问:
How does Android perform Data-Wifi Switch
I am trying to learn from Android source on Data-Wifi automatic switch.

The closest I can get is DataCommand and WifiCommand, they seem to switch network preference (through ConnectivityManager), by which I suppose can switch active interface. But I cannot find where these commands are actually used.

http://androidxref.com/4.4.4_r1/xref/frameworks/base/cmds/svc/src/com/android/commands/svc/DataCommand.java

http://androidxref.com/4.4.4_r1/xref/frameworks/base/cmds/svc/src/com/android/commands/svc/WifiCommand.java

Can any one has experience in Android framework point for me where to look at?

I know this might be the wrong place to ask source code question, but any help is appreciated.


问:
How can I successfully reset my tablet in Factory Mode?
I was struggling into the rootview of my Teclast P78S tablet trying to change the initlogo.rle image. I was going to replace it with a image of my own, when I accidentally deleted the original initlogo.rle.

Although I've been warned by a message in terminal like

initlogo.rle cannot be deleted. Read-only archive

It restarted my tablet and it is doing a boot-loop right now.

Solutions I've already tried:

Holding Power + Vol (down or up) doesn't power on the phone in recovery mode at all..

Theres a hardware "Reset" button, but when I press it, it get stucked at the boot-loop.

I can't access ADB in order to replace the original initlogo.rle

What should I do?
Is my tablet bricked?

There should be a solution for such a poor mistake.

ContentLicense: CC BY-SA 3.0


问:
Earbuds disable internal microphone
Whenever I plugin ear buds to my Nexus 7, I cannot use the microphone anymore. Same happens for when I plugin in a head set.

How to fix this?

Title: Earbuds disable internal microphone


问:
How do I stop the "Connected as Installer" when connecting to computer? (LG G3 Lollipop)
When I connect my LG G3 running Lollipop to my Mac, the phone connects as an installer. The Verizon Mobile finder window pops up and my phone notifies me it's connected as an installer.

I have changed the USB connection option to "charge only", but the phone continues to pop up the Verizon Mobile window periodically. It's not really running as "charge only"

What am I doing wrong?


问:
Downgrading from Lollipop 64-bit to Kitkat 32-bit hard-bricked Micromax Yureka device?
Update:

I didn't receive any answer here. Look's like my question didn't had enough research to deserve an answer. Here are some updates:

I posted the same question on OnePlus forums (I hang around) and received results here.

I looked for terms downgrade on Yureka Forums and out of 159 threads, didn't find any satisfactory result. I found only one argument worthy enough to be mentioned in step 3.

A OnePlus forums user mentioned that the 64-bit bootloader could be incompatible with 32-bit Kitkat in the event of downgrading, thereby, resulting a hard-brick. A Yureka forums user mentioned similar thing here.

As per this guide on XDA by a known member of OnePlus forums, and this info of all the partitions in a device here, I can conclude that a fastboot type ROM can flash any bootloader and similar partitions required at first stage of booting.

I read about bootloader and the name of the involved partitions from here and here.

A flashable ROM zip through recovery can hard-brick which is understandable here. However, if a fastboot type 32-bit Kitkat ROM is flashed on Yureka device running 64-bit Lollipop, should it be bricking it?

Note: This question is not meant to be open-ended, inviting discussion/opinion or chatty in nature. My question is only to know : Is there really a technical reason behind the warning or not?

Previously:

There is a post on Yu forums by a Community Manger here which says in warning the following:

Once device is updated with Lollipop (64-bit), downgrading to Kitkat (32-bit) is not supported and may hard-brick the device!

The users on the forum seems to follow the same warning whenever someones creates a thread regarding downgrade to Kitkat. The same warning can be seen on this website too.

However, nowhere it seems anyone cared to mention the reason for such hardbrick. May I know why 64-bit to 32-bit is a nightmare for this phone, or for that matter, any phone? Could it be just a gimmick to keep users at latest OS?


问:
Can android 2.3 be located through android device manager?
I'm willing to buy a Galaxy Y Duos just to track my car and I'd want to know if its android 2.3 supports being tracked by the android device manager on my PC? I just need to set up a google account, turn GPS and WiFi on, and then go to PC and track it?

Will it work?

Thanks.


问:
How is the resolution of round watches calculated?
I'm seeing these Android Wear round watches with specs of like 320x320 resolution.

What does that resolution mean on a circular screen?


问:
Exporting large Video from an app with no free space on internal storage
I have a large (4gb) video currently stored in an app called KeepSafe. My phone (Sony Xperia Z3 has 8gb internal memory and a 128gb SD card. However the internal memory is almost full (only 400mb free). KeepSafe is an app that stores photos/videos, hidden behind a pin. ie it stores them in an internal database.

I need to get this video off my internal memory and either onto the SD card or onto my computer. The problem is when I try to "unhide" it in the KeepSafe app, the thumbnail goes cloudy for a half hour or so (I assume this indicates it's processing) but then doesn't seem to unhide, and then seems to remain in KeepSafe. I'm assuming this might be because the phone is so full.

I was wondering if KeepSafe may require there to be some sort of free space buffer in order to unhide it?

It's very important I get this content off the phone in any way possible. Is there any way I can do this? Can I perhaps move the entire KeepSafe database from internal memory onto the SD card? If there is any way to achieve this I will do it.


问:
Unable to install apk files
This problem started around a couple of weeks ago when I tried updating some apps via the play store and it downloaded perfectly but the installation wouldn't progress. Nothing had changed before and I'd be stuck on the installation screen with no other option but to cancel it since it would seem like to take forever to install even a <2mb app. Since then I cannot install apps either from my sd card or via play store. The installation would just not proceed. Any fix to this apart from factory resetting my phone?(Moto G 2014 Android Lollipop 5.0.2)

Also I do not have any screen dimmer apps running in the background.

Title: Unable to install apk files


问:
How can I figure out, if my phone recognises my headset correctly?
Phone: HTC Desire 510
Headset: Samsung EO-HS1303

Problem: Phone refuses to output stereo sound on that headset.
Some exceptions: Occasionally after reboot and on first start of a few apps like bandcamp, there will be stereo sound. But only during the first track played.

Apparently the phone assumes to be connected to a monaural headset. How to find out why and how to fix it?

Update:
Phone is not rooted. Headset connected via 3.5 mm Jack. Headset works fine on Samsung Phone (one could expect that).


问:
Home Launcher in CM12 lags due to Tasker's accessibility feature
I'm using the Tasker app and noticed that if its accessibility service is turned on the Home Launcher seems to lag horribly. The lag is not only irritating but it also breaks the smooth animation of Lollipop. My views are shared by a user in this bug here. Unfortunately, the bug is still unresolved.

What can I do to fix this lag other than to turn off accessibility feature of Tasker?

Note that this accessibility feature is important because the technique in my previous question (Tasker app is skipping a task when profile is activated) is unresolved for some reason. Also, my other devices with Android 4.2.1 and 4.4.2 (both stock ROM) doesn't need accessibility service turned on to achieve my goal using Tasker.

Device: OnePlus One

OS version: CM12 (bacon)

Tasker version : 4.6u3


问:
Run Windows Mobile 6 Classic Virtual Machine on Android
I have a custom application that runs on Windows Mobile 6 Classic on a Psion Teklogix Workabout Pro G1/G2/G3. I am interested in running the same application without any alteration on an android device. Is there a way to run a virtual machine of Windows Mobile 6 Classic on an android device? Is there any other alternative to doing this without application alteration?
Thanks.
Mudassar Choudhry</p>


问:
How to get Kit Kat style status bar on Lollipop?
On my Nexus 5 I have Cyanogenmod 12 installed which is based on Lollipop. I don't like many of Android L features (OK, I know I can downgrade but not now) and I want to get back some of KK features back. Specially I want to have Kit Kat status bar and its tiled drop down menu. Is it possible?

P.S. I tried customizations but with android L I have to always touch and swipe multiple times to have the menu collapsed or expanded. I know if one swipes outside the dropdown area the menu will swipe directly up or down but it is still far from Kit Kat menu for me.


问:
Unable to mount USB Storage of ECOO E04 Plus Android device in Ubuntu
I have two phones. Ecoo E04 Plus and  MLAiS M52.

Both running Kitkat 4.4.4.

Both phones configured the same wrt USB connect mode (USB Storage).

Both have USB debugging off.

When I connect the M52, a screen comes up with USB connected with a picture of a large Android holding a USB logo. It has a button Turn on USB storage. This all works.

Problem is, the ECOO won't popup this screen, and I can't figure out why.

Changing USB debugging check box does not fix it.

Changing USB storage to MTP does not fix it.

lsusb with the M52 connected, I get:

Bus 001 Device 049: ID 0bb4:0001 HTC (High Tech Computer Corp.)

With the ECOO connected, I get:

Bus 001 Device 050: ID 0bb4:0c03 HTC (High Tech Computer Corp.)

/etc/udev/rules.d/51-android.rules doesn't have anything on either.

Yet the M52 shows the screen letting me proceed by enabling the USB storage connection, but the ECOO stubbornly just sits there and couldn't be bothered to do a damn thing.

Searching the net for solution, the results were not useful in regard to MTP and PTP.


问:
Can I set up one android phone, create a backup and restore it in multiple phones?
Where I work, we give all salesmen an Android phone with a set of multiple preinstalled apps, a predefined contact list, some predefined settings and restricted permissions over the phone's configuration.

I am responsible for setting up all of these things before giving the phone to the user, and it is a very repetitive and long process (almost an hour). I am looking for a smart way for automating or shortening the process as the set-up is always the same except for certain account information:

Set up the brand new phone with a unique gmail account we create for each salesmen. (THIS IS ONE OF THE STEPS THAT REQUIRE A UNIQUE ACCOUNT FOR EACH PHONE).

Install all predefined apps.

Set up all predefined apps.

Restrict permissions (using an app).

I'm thinking that a viable way of doing this is to completely set up one phone manually and do a complete backup of the phone to a computer. Then, in the future the only thing that I would have to do is to "Restore" the brand new phone with the backup and change only the settings that differ from user to user (i.e the phone's gmail account, the play store's account, the Whatsapp phone number, etc...)

Is this possible and viable?

How could I do this (which app could I use)?

The only caveat I can anticipate is that the original phone would be set up with a particular gmail account, phone number, etc..  Will I have any problem changing this setting in the restored phones?

Thanks !


问:
How does SIM unlocking work under the hood?
I know what SIM unlocking is and how to do it, but my question is how does SIM unlocking work under the hood? What is actually going on that prevents me from just popping another carriers SIM in there?

More importantly, since many of us have root access, unlocked bootloaders, and S-OFF for the HTC folks why are there no easy "flash this ROM\file and unlock your phone" scenarios?  Is the locking mechanism physically present on the Qualcomm chip and not actually part of the Android system? I would think it would be in the radio partition or EFS.


问:
Force Android Update to Samsung Galaxy S3
My Samsung Galaxy S3 which is on EE's network is currently still running Jelly Bean. Is it possible to push an update through to this, or force install one? If so, how do I go about doing so and what are the risks involved. I would be happy with either KitKat or Jelly Bean.

The device is currently rooted if this would help.


问:
GMAIL App: Fetching already deleted email repeatedly
As we can configure other Email Account like YAHOO email in a GMAIL App, I added my YAHOO Email Account to GMAIL App and can now Access YAHOO Emails using GMAIL App.

But the Issue is, when I delete my YAHOO Emails, somehow, it is again SYNC Back and I have to delete it again!

This is happening repeatedly and I am simply not able to delete my YAHOO Emails from within GMAIL App.

I can delete YAHOO Email from yahoo.com (WEB Interface) and then they don't re-appear in GMAIL App.

I can delete GMAIL Emails, and they don't sync back, it is an issue only with YAHOO emails.

Android device: Micromax canvas 4
Android OS Version: Jelly Bean 4.2


问:
App not installed when installing older version of an existing app
I have developed an Android app (Phonegap) in Eclipse with signed key APK file version (1.0.0) and save it on SD card of phone or download from site.

I am able to install it on non-rooted Samsung Galaxy Tab 2 phone having enabled "Unknown sources" and also able to update app with same signed key APK file version (2.0.0). It's successfully installed and working fine.

But now when I am going to install older signed version (1.0.0) app over latest version (2.0.0) by choosing "Install", I'm getting "App not installed message".

App downgrade working fine on Micromax Canvas device but not in Tab 2.

How to install it?


问:
Apps checking for app data in sd card instead of internal memory
I have an android phone with 13gb usable internal memory. I have many apps installed in it like fifa etc. I have been using the phone for quite some time without any sd card. Today I got an sd card and inserted it, and all of a sudden all installed apps are checking their app data in sd card instead of internal memory. Default write disk is internal memory and no apps have been transfered to sd card. I noticed this when I wanted to play fifa and it asked to download data first. How can I make my apps work without removing my new sd card?

Device
OS : 4.4.2
Model : infinix x507
Kernel: 3.4.67


问:
USB Debugging grayed out
I'm on an unrooted Verizon Galaxy Note 4 running Android 4.4.4.

I have not accepted the Lollipop preparation updates, because Android 5.0 on Snapdragon processors is known to have poor performance when using Gear VR.

In the last week I've noticed that USB debugging is grayed-out, even when plugged into a Windows 7 computer. I have tried using different USB cables and different computers.

I need to be able to use EasyTether, which requires USB debugging.

I have tried rebooting to Safe Mode, but this didn't help. USB debugging is still disabled.

Is it because I have deferred the OTA updates? How can I restore USB debugging without accepting the OTA update?

I've been using Samsung KNOX for months now and it hasn't interfered with USB debugging. Has something changed with Samsung KNOX?

Title: USB Debugging grayed out


问:
What is kcjlogger on Kyocera phones?
I have a Kyocera Hydro. There is a directory on the phone kcjlogger. It sounds suspicious. Does anyone know what it is or how I can investigate to find out? I was unable to find any answers searching. Thanks</p>

```<code>shell@android:/data/kcjlogger/tmp # ls -al
ls -al
-rw------- system   system          0 2015-04-15 22:38 kcjlog_from_tombstone_00
</code>```

Title: What is kcjlogger on Kyocera phones?


问:
Vanilla Lollipop on Sony Xperia Z3?
I'm new to the Android camp (having used iOS for many years) and whilst there are many things I like about my Sony Z3, the performance isn't one of them. At its core my question is;

Is it possible to install the vanilla version of Android Lollipop on my Z3, and revert back if needed?

A bit of background.
Since getting the phone about a month ago, I have had the phone crash on me at least every couple of days, and whilst doing a variety of things. Sometimes when trying to open an app, and sometimes just trying to unlock the phone.

Additionally the overall performance seems sluggish for a 'flagship' phone compared to my iPhone 5S.

I don't have many additional apps outside of the pre-installed ones and they are all well known apps, I'd like to think.

I am hoping to remove the Sony version of Lollipop and replace it with a 'vanilla' version in the hope that the phone becomes a bit snappier due to not having to run all of the Sony stuff in the background.

Alternatively, is there anything that can be done to speed up an Android phone, like how you can turn off some services in Windows?

Thanks

Title: Vanilla Lollipop on Sony Xperia Z3?


问:
Cannot Create/Modify Access Point Names in Mobile Network Settings - Huawei G700 - Android 4.2.1
I am trying to edit settings of APN (Access Point Names) according to provided guidelines by cellular company to be able to use 3G internet on my Huawei Ascend G700 running on Android 4.2.1.

Whenever I select any item from the default list of APN in Mobile Network Settings and then try to update and save any field, the whole item gets disappeared from the APN list.

Similarly while trying to create new APN, I provide all the fields and then hit the Save button, the new item doesn't get added to the APN list. No error is shown in this process.

Note: The SIM is inserted and working fine i.e., I can send/receive text messages, make/receive calls using the SIM. I've also asked the provider to send me a message for auto-configuration: when I receive and execute that, it says "internet settings already configured" – but the APN settings are not same like the cellular company 3G internet settings (so it seems auto-configuration has the very same issue of changes not being applied).

EDIT:

I navigate to Settings > About Phone > Status and observed that there is no info about Mobile Network i.e., Network, Signal Strength, Mobile Network Type, Service State, Roaming and Mobile Network State.


问:
Nexus 5 Suddenly starts playing music
I have a google nexus 5 which is a year old. I had no issues with it until recently, from around 3 days ago.

Music started playing suddenly from nowhere. It's not from the music player, and it doesn't show any notification, either. I can't even stop the music as I couldn't find out from where it is started playing. I had to turn off my phone to get it to stop.

What can I do to stop this from happening?

Title: Nexus 5 Suddenly starts playing music


问:
How to compile OBB data associated with an APK, into one OBB file?
I downloaded a game from some website, not Play Store. The download consists of two files, namely an APK (StarFront: Collision HD) and data/cache files (OBB), but the OBB is a bunch of loose files that still needs to be compiled into one.

How can I compile it into one OBB file? (Alternatively, how can I install an APK manually which needs OBB file?)

Here's the link: http://pdalife.ru/starfront-collision-hd-android-a2738.html
It's in Russian though, use google translate. I'm not quite positive about what kinda answer it'd be that's why I came to you


问:
Android not remembering which music app was in use last when pressing headset play/pause button
My phone has developed an odd and hard to reproduce problem lately.  I have been listening to a lot of audiobooks using BeyondPod.  Throughout the day, I often pause and resume the tracks using the play/pause button on the headset.  Usually this works without a hitch, but at random times it will launch the basic Android music player and start playing music, rather than resuming my audiobook where it was last paused.

When I listen to music, I use Rocket Player.  I have never intentionally launched the basic player.  I used to have random conflicts between BeyondPod and Rocket Player, but after being told by the Rocket devs that they couldn't control which player got control if I had headset controls enabled in both players, I just started switching off the headset controls in Rocket Player when I wasn't using it.  This worked for a while until recently when the basic player started launching instead.

I have noticed that it seems to forget that I was using BeyondPod primarily if it has been paused for a while and other (non-music) apps have been launched.  This leads me to believe that it is caused when BeyondPod gets deprioritized out of active memory.  However, I have been unable to force it to make this switch on purpose.

Is there any way to be able to select a system-wide default music player so it will stop launching the basic one?  I couldn't find a setting for this in my phone.  Alternatively, is there a way to mark an app as "higher priority" so it is less likely to be kicked out by other apps?  Any other thoughts on solving this?

Phone: Samsung Galaxy S4 (Sprint)

Android: 4.4.2

Rooted, but on stock Samsung image.


问:
Volume Rocker only controls Bluetooth In-call Volume; cannot control all other volumes
I am a bit baffled as to why the volume rocker is currently controlling "Bluetooth In-call Volume" I have not nor have  I ever paired a BT device with this phone. In fact I just always leave the BT signal off.

What else could be causing this and how do it change it so that my dedicated Volume button can control my music and not some Bluetooth thing that doesn't exist.

The phone is an LG Esteem, Android Ver 2.3.4


问:
Samsung Galaxy S3 shows up in Device Manager but not in Explorer
I'm trying to connect my Galaxy S3 to my computer so I could transfer some files, but my computer doesn't seem to be recognizing it.

I've already followed instructions found here about putting the phone in download mode and then re-plugging it in.

Strangely, when I look in Device Manager, my computer does notice my device.

Why does Device Manager notice it but Explorer not? Is there any way without Explore to access my files on my phone?


问:
Can an Android device's security be circumvented when its screen is being changed?
I had shattered the screen on my device (both touch and display) and it was locked with a password.

I took it to a nearby repair shop, and they took a long while to do touch-testing out of my sight after the screen was changed. The duration (about 20 to 30 minutes) made me quite anxious since I could see them touching it but not what they were doing on the screen.

Was it possible for them to have accessed the data in the phone (which was behind a pattern lock) by somehow circumventing it?

I also saw them plug the phone into a device which they said was related to testing, but it did not look like a computer. Is it possible to brute force "crack" pattern locks (or even passwords) within a few minutes with that kind of device?


问:
Closing internet access for some apps
Is there a way to prevent some apps from accessing to internet when wi-fi or mobile data is on?</p>

Title: Closing internet access for some apps


问:
All the info of Google "My Maps" in offline mode
Using Android 5.1, I would like to use all the information of "My Maps" in offline mode, but I do not find the way to do it.

I mean, I've downloaded the map of a city to be used offline and it works ok. If I am online, I can insert one of "My Maps" and browse over that map the points I inserted (click over them and see the associated information). However, if I am offline, I can not see that information. Does anybody know how to store it?

Thank you very much.


问:
can a phone detect 3D posture of a person with the camera?
Does an Android phone have everything it needs to reconstruct someone's posture, by using the camera sensors?
If yes, are nowadays' phones fast enough for this?

Here's a video of what I mean on the XBox Kinnect

Thanks in advance


问:
Can't access external SD Card in TWRP after Link2SD
Ever since I partitioned my SD card for Link2SD, TWRP has been unable to read it. CyanogenMod 12.1 views it fine, but TWRP just shows the card as being 0MB, and freezes when you try to select it.

Is this a format problem, or a problem with TWRP? Am I able to fix this? The card is a 32 GB Class 10 card. The first partition is FAT32 and the second is ext4.


问:
High Battery Drain with CM11 Stable on HTC One due to MediaServer
What's the best way to fix a high battery drain?

I had been using an old nightly build on my HTC One (since no stable had yet been released for it), and I had no battery issues. Just sitting in my pocket all day, the battery would still be at 75% by day's end.

Then I upgraded a week ago to the most recent stable (CM 11-20141112-SNAPSHOT-M12-m7), and now my battery's completely dead in about 3 hours even if I don't use my phone.

The battery statistics app says that the "Mediaserver" is consuming 45% and "Google Services" is consuming another 39%, which seems insane. Historically, "screen" is usually the biggest consumer, but that's now at only 8%.

Googling shows this is a common problem with CM, and there's a ton of different causes and fixes. What's the best solution? I picked a stable release because I thought...well, it would be stable and relatively bug free. It seems counter-intuitive to upgrade to a nightly to fix one bug, while likely introducing more.

A common solution mentioned is to "disable Google Now", but I don't have any such app installed.

Another solution is to disable location reporting for Google Services, but they don't mention how. I think they mean disabling location reporting under "Google Settings", but this effectively disables all apps that use GPS, and I use Google Maps and Navigation quite frequently.


问:
Change Android's default focal-length
I have Samsung device( GT-S7562) with 5 mp camera . When I updated it into CyanogenMod , I lost its camera quality . It always force me to take pictures with 3 mp . There is now option to change it . I tried lot of camera apps( including Google cam, HDR cam, Ported xperia,Samsung &HTC cams ...) and all those apps saying I have only 3 mp cam . So i think it is about the OS .

where can i change it ? I am happy if you prefer me to edit system files ;-)

Thank you

Title: Change Android's default focal-length


问:
Unable to read from '/sys/class/leds/wled:backlight/max_current'
I updated my Sony Z1 Compact to 5.0. And now every 50ms I see message in LogCat

```<code>Unable to read from '/sys/class/leds/wled:backlight/max_current'
</code>```

What's the problem? And how can i resolve it?


问:
I cannot see folders on my sd card
I was trying to transfer some music into my phone so as usual I connected it with my USB, however, out of the 48 folders I have I could only see 14... I already tried to check the "hidden" folders but I'm still not able to see those folders. Help please? BTW, I have a LG G3 phone, in case anyone wants to know.</p>

Title: I cannot see folders on my sd card


问:
Android Photos App Clear Data
I've cleared Data on the Photos app and photos are no longer showing. Any Ideas how to fix this?</p>

Title: Android Photos App Clear Data


问:
Recover CM system with bad Google Apps update
I recently updated Google Apps on my device. Now, when I start my phone, I get repeatedly inundated with "Unfortunately, {{app}} has stopped." with Keep, Gmail, Wallet, etc. filling in the blanks. The dialogs stack up, and whenever I manage to dismiss all of them, they pop up again about a half-second later, making it impossible to do anything. I've enabled ADB on the phone, but it isn't listed when I run adb devices.

I think I could probably wipe the phone/factory reset, but I have data I'd like to pull off first. Is there anything else I could try?

CM 12.1


问:
Texts going to email
I have a news Samsung S6, and when someone who is in my contact list texts me, it not only comes to my phone but goes to my email inbox. How can I stop this?</p>

Title: Texts going to email


问:
Can't add Google Apps account with SSO using ADFS
SSO - Single Sign-on

ADFS - Active Directory Federation Services

My school requires Active Directory authentication, where after logging in through Google you are redirected to an Active Directory login prompt. In KitKat this redirect happened naturally when I went to add a Google account.

On Lollipop, for some reason Google decided to redo the process where it doesn't give me the chance to sign in to AD and just redirects to the page you get when you mistype your AD credentials.

I have tried logging in to AD in Firefox and Chrome incognito prior to adding the account and nothing. I even tried disabling Chrome in settings to see if it would default to Firefox but it seems the Google account setup process has a built-in browser.

Is there some file I can modify or copy to manually add the account, or is there a way to inject authentication into the Google account setup process?


问:
Lollipop unpin screen
To unpin a screen on my Nexus 4, it asks me to touch and hold the 'Overview' key, but on my wife's one, it asks me to touch and hold both the 'Back' and the 'Overview' buttons.

Can someone point me out how can I change the screen unpin key combination?

Edit: both phones are running Android version 5.1, build number LMY47O.

Title: Lollipop unpin screen


问:
Mute or change user group ringtone depending on current location and time
Here's a sample scenario: when I'm at home and it's after 10pm, all call need to be silent, but family calls are enabled to ring loud.

Is it possible to do this? (preferably using Tasker, but 3rd-party apps is okay)


问:
after a routine reboot, Google Play Services disappeared on stock 5.0.2 Moto E 2015
Been loving my 2nd-gen Moto E for the last month or 2. Rebooted it last night and when it came back Google Play Services was missing, i.e., no longer listed under Apps, no way to clear cache for it, no way to open Hangouts, Play Store, Gmail, Contacts, etc. Google account no longer listed under accounts, and can't add a new one.

For the record, I've only installed things from the Google Play Store and almost exclusively use Google apps (plus a few other big name things: Pandora, Vine, Dictionary.com, LastPass, Out of Milk, VLC, Power Toggles, Smart Launcher Pro).

Nothing changed between the last couple reboots. (Rant: This is the kind of bull that makes me hesitate to recommend Android phones to my non-techie Apple-prone friends and family.) I know I could do a factory reset, but given I've done nothing unusual, that's going to destroy my confidence in this phone.

Anyone seen anything similar? Where can I start?

EDIT: I just went ahead and did a factory reset. All was well for a couple weeks or so. Then one day this happened: Gmail, Inbox, Messaging, Messenger work until try to open conversation -- crash


问:
Simplify, clarify backup for a former iPhone user
Former iPhone user, 5 months with Droid (Samsung Galaxy S 5, AT&T). I'd like clarity about backing up. The process is no longer centralized, so (sorry) either is my question.

How do I safekeep my apps, app data, settings, email accounts, wifi settings, tweaks, wallpapers...music, photos, contacts safe in case "something" happens. I think I'd like the simplest most comprehensive options for now.

I have my eye on Titanium eventually. Of course that means rooting, and before I'd do that I'd...need...to...back up my data.


问:
Tethering: I can search, but no search links work
House move, ISP screwed again, so I'm trying to tether from my Android 4.2.2 phone. This is UK, using t-mobile pay-as-you-go sim, with a 2GB data package. They appear to be tethering-friendly (EE own T-Mobile)

I can check email (secure POP, port 995), but not send (secure SMTP, port 465).

I can do searches on google, yahoo, duckduck, but in all three cases trying to follow a search result just sits there forever. All three of those sites does the annoying redirect thing, instead of linking directly to the target site, so the browser URL is still their site when it is not working - it does not get as far as the target site. The sites I tried directly also do not seem to work, e.g. I could not connect to stackoverflow. (I'm on free wifi at a coffee shop, currently.)

Outgoing ssh (on a non-standard port) worked fine.

An rdesktop connection failed (port 3389, I believe).

This has all been from Linux. I tried both Firefox and Chrome.

I'm a bit stumped where the problem might be: on my machine, at the android phone, or with the network.

UPDATE: As the fact I can write this shows, tethering is now working for StackOverflow (and related sites like this one), and also rdesktop is working. And clicking on google search results. (But not outgoing SMTP, that still fails.) Weird. Could it be bad DNS settings, er, or something, being cached??

UPDATE #2: Three days since I posted this question, and tethering continues to just work. I had just one period of no connectivity, but I was in a better troubleshooting position then, as I had two devices connected, both of which were affected. So I rebooted the Android phone, and it then worked when I tried again.


问:
facing irritating add pop-ups
I am using micromax Yureca handset and installed Android 4.4.

I don't want to reset my device, so can someone please tell me what is this all and what is smartApp, ads coming on behalf of it, but can't find it as a installed app ?

Title: facing irritating add pop-ups


问:
After updating to 5.0, default E-Mail drains battery
Recently I've updated my Sony Z1 Compact to Lollipop and noticed that battery is drained much faster than it was in KitKat.

~50% of battery usage is by builtin E-Mail app, here are the stats:

I have two e-mail accounts with following settings:

Check frequency -- Every 10 mins

Days to sync -- 30 days

It also overconsumes traffic - it receives about 7-10 Mb per day even if I don't have new emails. E-Mail server is IMAP w/SSL, but not Exchange, and both accounts are pretty big (about 4-5k e-mails). Usually, I've disable Wi-Fi. BTW, firmware is not rooted.

Any ideas what it receiving so eagerly, and how to stop it doing that?


问:
Help with Blade mobile network not working
I've been given an Orange San Francisco by my boss to fix for him. At the time he claimed it was bricked but its not as bad as first thought.

His initial problem was that the phone was unable to connect to the mobile network, despite having: a sim inserted, mobile tower in range, APNs configured correctly.

I have got a clean Gen 2 Cyanogen Mod 7.0.3 flashed with no problems. The APN settings are correct according to the Cyanogen APN list but it still doesn't connect to mobile networks.

I myself am a Desire man and so I have little real knowledge of the Blade. If it was a Desire I would try reflashing a radio rom but I'm not sure of the Blade equivalent.

Can anyone suggest what I should do next?


问:
Same android OS version -- one has move to SD card button, the other doesn't
I have two phones. Both have android OS 4.1.2 installed. Though on one phone it has "Move to SD card" buttons (though some apps have it grayed out), on the other this button does not appear at all. I mounted SD cards on both phones. And the same app would have the button on one phone, not the other.

I have read pages saying android disallowed that at some point. But how come they have it on some apps, not on others?

I loaded Link2SD and use the "move to SD" button there. I got this warning msgs:
"Warning: App2SD is not supported by your device. Because your device has a primary external storage which is emulated from the internal storage. you can link the app in order to move its files to your SD card"

I have little idea what it means. this phone only has 1.24GB of internal storage and it quickly drains.

Two models are Huawei Vitria (which can move to SD card) and LG-LS720 (cannot move to SD card)


问:
How to prevent Firefox from killing music?
I have this problem constantly when I try browsing the web while listening to music. It doesn't happen on every page, but probably somewhere around 80% of pages will cause my music to stop playing. This happens with both streaming music via the Pandora app, and when I'm playing mp3s from my SD card through the native music player app. Does anyone know of a setting, either in Firefox, one of the other apps, or universally in the Android settings, that can stop this from happening?

This is an LG Optimus F3Q running 4.1.2.


问:
Select file from Downloads to upload via web form
I'm on a Samsung Galaxy S3 and want to upload a file from my Downloads folder to a website using a form on that web page.

But when I click the button to browse for a file to upload, I can only select files from my Music and Gallery folders, or the camera.

I tried putting the files in my Gallery or Music, but those apps only display music or image files.

So how can I browse to my Downloads folder and select a file from there to upload?

I can't quite believe I'm having such an idiotic problem.


问:
IMEI spoofing won't fix invalid Sim Card
I recently bought a second-hand LG Pro Lite. I restored it to its factory settings. For a few days, it worked properly. A week or so later, I had no phone service. Everything else works fine.

As I boot my device, the messages displayed are as follow (one changes into the next):

Service Disabled

No Service

Invalid SIM Card

I have tested the SIM card in another device and it works fine. I have tested other SIM cards in my device, none work.

My best guess is that the previous owner (which can no longer be found) reported it as Stolen and provided its IMEI No., thus rendering the device useless with the carrier. (?)

I want to make the best out of a bad situation, so I rooted my device and changed my IMEI using XPOSED Framework, rebooted it and... nothing. It was properly changed, but still no service. Is there anything else I can try to use it fully?

-

System Info:

Android: 4.4.2

Kernel Version: 3.4.67

Phone: LG D680 "Pro Lite"


问:
Granting device admin previlage to email account
I am connecting my gmail app(or any e mail application) to my office e mail using exchange. It asks me to add the mail app as a Device administrator for my phone. So that it can  Erase all data,Set password rules and the list goes on.

Is it safe to grant the previlage?

Can someone else erase my data or do anything to phone?


问:
Access Bootloader on VSD241
I'm trying to access the Bootloader on a Viewsonic VSD241, but the menu that comes up tells me to hit the "volume up" button to select Bootloader from the menu. There are no hard volume control options on this tablet, so I was wondering if anyone had an idea for what to do. Any help is greatly appreciated.</p>

Title: Access Bootloader on VSD241


问:
Bluez-A2DP as sink
I want to configure and use Bluez as an audio sink for my Android Based Car Head Unit, so that I can connect a smart phone to the Car Head Unit.

The smart phone must work as a source of audio stream and head unit must work as an audio sink, so that when I stream from my Phone I should be able to listen to songs on the car speakers.

The car head unit is android-2.1 and uses Bluez -  4.47.

Has anybody already achieved this. If yes, please let me know what extra modules/application is required apart from Bluez to achieve the same on the Car Head Unit.

Title: Bluez-A2DP as sink


问:
Running 16:9 games on a 4:3 screen device
I recently bought a tablet with a 4:3 screen. I noticed that some games don't seem to take this into account and the graphics end up stretched vertically. It can be rather distracting at times.

Is there a way to fix this, e.g. letterboxing to preserve the original aspect ratio?


问:
App notifications block setting not set after phone restart
I updated my Sony Xperia Z1's Android to Lollipop (official update from Sony) a few days ago, and just noticed that the applications having their notifications blocked reset back when my phone is restarted. The Priority and Sensitive options are saved but the Block option appears to be not. For your information, the app I'm blocking is Psiphon – but testing this with other apps revealed it affects almost all of them, with a few exceptions only.

What could be the problem? Possible bug of Android?

Thanks


问:
How to have Android use one ext3fs partition instead of going rogue with virtual partitions for apps on the external sd card?
As this answer pointed out, moving apps to your external sd card decreases your overall system performance due to the tens or hundreds of partitions created for those apps.  Now I wonder, is there any way to avoid this and have the system use a single partition, maybe formatted ext3 or xfs or the like? My devices are rooted, if that helps, but I'd prefer sticking to the stock (samsung galaxy) OS.</p>


问:
Show only photos taken in camera app
In the Android 5 camera app, if you browse the photos taken, there appear also photos from Whatsapp, music album covers, etc.
Can you make the camera app only display photos taken?</p>

Title: Show only photos taken in camera app


问:
Can I update my Rooted Nexus 5 4.2 to 5.1 without bricking it?
I'm scared of updating my nexus 5 4.2 system as i've read reports of people's rooted system going into a boot loop when doing an update. Is there a safe way of upgrading when my system is rooted?</p>


问:
Can I root my Samsung Galaxy s5 900V running lollipop?
I'm running lollipop on my Samsung Galaxy s5 900V Verizon model. I can't find a way to root. Anyone have any ideas? Also, I'm running a mac so any instructions there would be great. Thanks!

Also, Im worried about trying to root without a full backup. Ironically, getting full backup by rooting my phone is one of the reasons I want to do it. Any way I can do a full backup of my phone without root before I try?


问:
Playing an embedded Youtube video directly in the Youtube app
I am using a very low speced smart-phone and heavy sites like Khan Academy are very difficult to load.

When ever I watch a video on their site my phone slow down and frequently crashes.

So, is there a way to directly play the embedded Youtube video in the app.

I want to do this because, that page could be locked away for a while, and I can concentrate on the lectures.

And can this be done without compromising the sites features, like the one that keeps track of "which and how much videos one has seen", so I could get my "energy points" and keep track of my performance. In other words, KA must know what videos I have watched.


问:
Change theme on Samsung Galaxy Alpha
I have a Samsung Galaxy Alpha G850A and while I've been able to adjust a lot of settings including the wallpaper for the home screen, lock screen, etc I haven't figured out how to get rid of the ugly Windows 8 4 bit color scheme. Other phones apparently have access to a theme option under settings, mine shows nothing when I search in the settings for 'color' or 'theme' and I've probably have gone through 95% of the various settings manually at this point.

How do I change the theme colors on my Samsung Galaxy Alpha?

I am completely willing to hook it up to my PC and manually edit configuration files if someone is that awesome to know where it is (and if it supports RGBA)?

Title: Change theme on Samsung Galaxy Alpha


问:
Is there a protocol for android which allows direct file modifications from computer?
Both the MTP and PTP protocols for file transfer do not allow editing or viewing files on  the phone from computer directly. In other words, you have first copy the file from the phone on the computer and then view/edit it. Are there any alternate protocol that support viewing/editing files directly?</p>


问:
Cannot read Android Partition Image created using ADB
I am currently working on a Mobile Forensics demonstration for my college's computer science capstone. For this demonstration I have been trying to create a partition image of the an old Droid x2 user partition and then examine the resulting data using forensic software. However neither FTK imager, nor Autopsy have been able to read the created image files.
I have been working with a rooted Droid x2 running 2.3.5, and have been using Android ADB to try and create a dd image.

```<code>  'adb shell dd if=/dev/block/mmcblk0p16 > userdata.dd'
</code>```

This command seems to work and creates an appropriate sized image file but various forensic software give errors such as 'does not contain valid evidence.'

I have tried creating .bin, and .img files to similar effects.


问:
How to setup wifi from adb shell?
I'm using adb over USB to shell into a rooted CyanogenMod-modded device. I wanted to debug my wifi connection through the command line, connecting to an open (unprotected) wifi network. Is it possible to do from adb shell? </p>

Title: How to setup wifi from adb shell?


问:
Further train Samsung Galaxy S6 fingerprint reader
I know that with iOS there's a trick that allows you to keep on entering your fingerprint for training after the basic mandatory set. </p>

<p>Is there such a thing for Android with a Samsung Galaxy S6? </p>


问:
Don't play phone ringtone if bluetooth headset is connected
We recently got rid of our landline and were are now using a 1st gen Republic Wireless Moto E as our home phone. We also bought Vtech Connect to Cell phones so we'd have a more home phone like experience. As far as the Moto E is concerned, the cordless phone is just a bluetooth headset. We we get a call, the cordless phones ring, and the Moto E itself also rings. We really only need the cordless phones to ring, not the phone itself. My mom uses this Moto E as her cell phone when we are out of the house, so setting a silent ringtone on the Moto E isn't really practical. Is there a way make the Moto E itself not ring while it's connected to the bluetooth cordless phones?</p>


问:
Settings while debugging for battery optimization
I just got my new LG G2 4.4.2 and since I will debug in it a lot, I want to know what settings should I use in order to harm less my battery. While in debug mode, I have 5 options:

Charge phone

Media sync (MTP)

Tethering

LG software

Send images (PTP)

Which one should I choose for less battery consumption? Also any other setting that could boost my battery life?

Thanks


问:
mDNS (.local) not working on android Phone browser
I have set up MySite.local on raspberry pi. I can access MySite.local on laptop via WiFi. But not able to access on Android mobile browser(Chrome).

Please provide me a solution

OwnerDisplayName: Nimish Patel


问:
Crazy gps path result
I'm not sure if this is an issue with the gps, the app I'm using, or android itself, but since it's android that ties it altogether, I'll try posting this here (let me know if I should move this to a better spot).

I tend to use my phone's (Samsung galaxy S2) gps along with MyTracks app to record when I go on a hike. Mostly it works fine, but every once in a while, I get this strange result:

Obviously, I can't hike this path in a few hours, so something is definitely wrong with the resulting coordinates. I write a quick script to filter out anything that looks too far (anything more then a few degrees difference), eliminating those far off points. I get this:

I try to filter it some more by tightening my error values or random things that come to mind, but it doesn't really work well. I did notice though that all was not lost as it actually recorded the first half just fine and the actual path looks like this:

But the added return path looks like this:

Zooming in to a section, I can see that the return path is very jerky with what seems like many points added all over the place roughly along my path:

And zooming in more:

Any idea what causes this to happen and how I can fix/prevent it in the future?

As a side note, what I usually do is export the gps coords from MyTracks to csv, where I draw them using google maps in some javascript I wrote. The above pictures are from that result. Trying to view the path in MyTracks itself usually results i the app freezing, then displaying a blank map or just force closing,

Title: Crazy gps path result


问:
Upgrade Huawei Ascend Y530 to Lollipop or Kitkat?
How do i upgrade my Huawei Ascend Y530 phone to KitKat or Lollipop?
Please, no surveys.
Also, it is the MEO version (100 euros), not the Original (120 euros).
It is rooted and currently running Android 4.3</p>


问:
Bootloop phone wont boot after boot screen
Folks,

I've rooted by buddy's phone and tried changing the boot animation to marvel boot screen, but unfortunately the phone won't boot further it keeps looping at boot animation. Now the phone's recovery mode option/factory mode is not working. If i try using the key combinations it simply flashes the screen and moves to boot loader.

I tried using fastboot from ubuntu but the tool is not listing my devices
but using lsusb i was able to list the device

Bus 002 Device 047: ID 0bb4:0001 HTC (High Tech Computer Corp.)

Please note that i've set permissions and updated the below file

```<code>  /etc/udev/rules.d/51-android.rules
</code>```

Also usb debug is disabled under developer options in the phone

Now, is there any way to access the phones root fs from a pc to remove this rogue boot loader so i can boot the phone.Please help.


问:
Nexus 5 won't start stuck on loading screen
My Nexus 5 has been stuck on the loading screen. After turning it off it wouldn't start and after showing the "Google" logo would just spin the 4 coloured dots for hours on end.

I tried a few things such as clearing the cache and doing a factory reset through the bootloader, but this didn't work.

I did some research and came across this forum topic which suggested re-installing an image. It took me a long time to figure out how to do this, but I eventually followed this guide

It involved unlocking the bootloader, for which I got the warning that my warranty would be voided, but I thought whatever I need to try this.

I followed all the steps and installed this "5.1.0 (LMY47I)" with the checksum "d78c50bc06fe37a19536cbca0a17394a" from the Google website here

When I was in recovery mode LMY47I was listed at the top, so I presume that this is the correct image to use.

This seemed to be installed just fine. However when the phone restarted I was still left with the same problem. The four dots just spin endlessly and the phone does not start.

Is there anything else I can do to resolve this?

UPDATE: I managed to get the phone to start by using the image "4.4 (KRT16M)", the earliest listed for the Nexus 5.

After doing this I was able to start the phone but camera, gallery and play store kept coming up with an "unexpectedly stopped" error.

I decided to go through the stages of upgrading bit by bit before installing any apps or doing anything else. I was using the system update in settings, not the bootloader. This seemed to be going okay (although strangely no signal) until I got to either 5.1 or 5.0.1 (I can't remember which) and after the download, install and reboot I was back with the spinning dots loading screen indefinitely again.


问:
Some notification tones only shows up for certain apps?
Let's say WhatsApp app. When I try to change notification tones for WhatsApp, some ringtones show up which are not shown when I change device's notification tones.

For example in Sound Picker, only one tone named Xperia is shown when I try to change the device's ringtone whereas in WhatsApp, Sound Picker shows two tones named Xperia. There are still more like that. How can I make those tones visible for all the apps?


问:
After splash screens, Moto G screen goes black. Stock recovery won't start either. What to do?
I have a one-year old Moto G (1st Gen) that suddenly today refuses to boot usefully (a boot loop? Not sure.), has a blank dark screen but backlight stays on. Tried to restart it using the power off button.

I get the splash screens & a startup vibrate but then the same dark screen.

Succeeded in getting it to the boot menu (Version 41.13; Battery OK; Device is locked; Status Code 0) using power + volume key press. If I try selecting recovery it reports "Boot up failed".

Selecting any of the other options on the boot menu just brings me back to the original dark screen + backlight.

Any other things I can try? Phone is out of warranty so trying doesn't hurt me.

If I keep the phone on the dark screen it gets warm. Not sure if that's merely the backlight or there's some hung processes running.

Ideas?

Edit 1:

Some more information:

Yes, I've an alternate phone that I can use in the meantime.

No custom ROMs etc. were ever installed on this phone or even attempted to be installed. The phone was purchased new without any contract. It is running the Stock Google-Motorola Android.

Have not tried installing any custom recovery MOds yet.

Tried contacting Motorola using their online chat and went through the troubleshooting steps he advised. Nothing fruitful. He has asked me to call their Level 2 Support. I will on Monday.

The only procedure I found to get into Safe Mode asks to keep the on screen soft power off  button long pressed and wait for a prompt. I cannot get an on screen power button so not sure how I can get into safe mode.

History before the problem occurred: Phone was in  a call in progress. Suddenly had a lot of popups warn that various applications were being terminated. After that it went into this blank screen unresponsive state. No recent phone drops or other mishaps.

The one thing that I have gotten to work from the boot menu is a menu item that shows the IMEI / Sr No. / SKU / Purchase Date in Bar Code Format and Text.

Edit 2:

More Progress. Got fastboot. Posting some basic output below. If any other fastboot / adb commands will help in getting more debug info I'd love to know.


问:
Adjust the default orientation on an Android tablet
So here's the low down: my tablet has this rather annoying feature where its default orientation for profile is set so that the power button is on the bottom. Because of this, I have accidentally powered out of several games by shifting my hold and shutting it down.

Is there some app or setting to change what the default setting is for orientation? (And if I could also adjust landscape, that would be great.)

OwnerDisplayName: Cyberson


问:
How to set an app to use its native language?
Thanks to my phone being rooted, I can use app settings to set an app's language without having to change my system language. but is there a way to determine the native language of an app and by default use that?</p>


问:
How long does an erase message sent from Android Device Manager last; when can I turn it back on?
I lost my phone recently and sent an erase message from Android Device Manager. I got my phone back and, because the battery was flat, it hadn't gone through. I had cancelled phone and had no WiFi, so I went into Google Settings and turned Android Device Manager off. Connected to internet without it being wiped. Is it safe to turn Android Device Manager back on without worrying that the original intent to wipe the phone will continue? How long do I have to wait to turn it back on? </p>


问:
Android 5 lockscreen does NOT timeout
When I receive notifications, plug in power, or manually turn on my phone display, the lock screen stays on forever (until battery runs out). My display timeout setting is set to 15 seconds (the lowest). The normal display times out correctly, just not the lockscreen.

A month ago I enabled developer mode, but only used it to enable usb debugging and made an adb backup of my phone. The lockscreen still timed out after that and I have made no other modification to the settings since then. The phone has not ever been rooted. Developer mode is currently off. Virus protection is on, and I've only downloaded authorized apps from the store.

I tried turning on/off gestures, smart stay, removing phone from case, cleaning screen, etc. I have no idea what is causing the lock screen to stay on and not timeout.

Samsung Galaxy S5 SM-G900T
android 5.0

Title: Android 5 lockscreen does NOT timeout


问:
How to view on-line or download my Android Contacts metadata including Linked info from Linked Apps
There is far more information about my Contacts in my Android phone then what is visible on-line from https://www.google.com/contacts.

Primarily I am referring to the information from "linked contacts" which Android captures and consolidates in the "People" "Phonebook" on the Android OS.

Presumably, Google is capturing and storing this information from my Linked Accounts (the content is not dynamically being pulled from these apps every time I pull up the Phone book).  I would like to view the total information regarding my Contacts on-line including this metadata... anyone know where this may be available?


问:
Ngrok (compiled for Arm5) crash on android: can't find core dump files!
I downloaded Ngrok which I want to install on a old HTC Hero [the project is to transform the phone in a ipcam, reachable behind a NAT network], so I chose the version compiled for Arm5. You can find the executable here: https://dl.ngrok.com/ngrok_2.0.17_linux_arm_v5.zip

Now, I tried to launch it on Hero and on a Nexus 5 with Lollipop, but I got a "Segmentation fault" error. The developer of Ngrok ask me the core dump, but even if I set the ulimit to unlimited, I cannot find nothing in tombstones folder.
Can someone help me? For example trying the Ngrok on you phone and tell me 1) if gives the "segmentation fault" error; 2) providing me the core dump; 3) tell me why I cannot find the core dump files...

To execute Ngrok on android you have to put it ind /data/ folder, then assign executable permissions (chmod x+ ngrok OR chmod 555 ngrok), lastly execute it with ./ngrok

Thanks in advance,
J.


问:
Hangouts not showing contacts, or after selected, their phone numbers
When I select a contact from "Contacts" and tap to send them an SMS, instead of their name, it only displays their phone number. If I try typing their name in hangouts, it doesn't come up at all! The contact is stored on my Google account and there are no duplicaes.

I'm on a Verizon LG G2 running Android 5.0.2 and Hangouts version  3.1.89134953


问:
Bootloop Galaxy S2 GT-I 9100
My phone( Galaxy S2 GT-I 9100)  is in bootloop . I have installed cwm v6.0.3.6 and I have done wipe cache and wipe dalvik , after that I have installed cm10 but the problem doesnt fixed . So how can I fix this problem? I don`t want to lose my pictures and music.</p>

Title: Bootloop Galaxy S2 GT-I 9100


问:
Twitter does not load images anywhere
I recently noticed that my Twitter app on Android does not load any new images. The ones stored in the cache still continue to open, but none new are downloaded. I cleared the app data, uninstalled updates (it is a pre-installed app), and restarted my phone, all being some of the solutions I found over the internet, but none worked. But it turns out the problem goes deeper than that.

I installed a couple other Twitter clients for Android, and they both fail to load the images too. I opened Twitter on my laptop, and no images there as well. Does anybody know why this could be and how to solve this?

P.S. I'm not sure if this question qualifies for this Stack site, but since I couldn't find any other site that was remotely relevant to my question, I went ahead with this. Also, not that I think it matters now but just in case, my phone is a One M8 with Lollipop installed.

Title: Twitter does not load images anywhere


问:
Show plain lock-screen when multimedia cover creates text contrast issue android 5.0
Occassionally I'll be listening to or reading media on my phone and the screen will lock.  When this happens, the lock-screen background is the media "cover".  For white or very light media covers, there is very little contrast between the lock screen numbers and the background, rendering the numbers virtually invisible.  In my last android version, I could swipe down from the clock to bring up a lock-screen with a plain black background.  This is not working with Lollipop.  Is there some trick I'm missing, short of forcing a restart on my phone?  (Samsung S4 16GB)</p>


问:
Why am I not getting access to the full internal storage space?
Please note: There are similar questions to this one, but this is different: in this case I am root reading all the block data directly from /dev/block/*, not a regular user trying to save files to pre-partitioned areas.

According to the internal memory capabilities this phone, a HTC One V (a version tailored for Cricket Wireless if it makes a difference), there should be "4 GB (1 GB user available)".

However, when I create a dd image of the internal storage (accessible through /dev/block/mmcblk0), it tells me the resulting image is 2.3GB large. Even if I create an image of each partition individually, the result is still 2.3GB.

Why is there a discrepancy between how much storage is listed on the phone's specs, and how much data can be accessed through /dev/block/*?


问:
No External Storage available Galaxy S2
My galaxy s2 was in bootloop ,  I have installed cyanogen mod 10 on it . Now I can`t see any files on my storage , when I enter camera or gallery it writes "no external storage available" . And the file manager doesnt show it too . But when I enter to that storage from recovery it shows all files . What can I do?</p>

Title: No External Storage available Galaxy S2


问:
Screen problem in Motorola moto g 2ng gen
There are black dotted lines over all on the screen. The touch works fine but black dotted lines randomly appear all over the screen.

Click image for larger version

Here is the screenshot. They appeared a day after I bought the phone


问:
Battery duration instead of battery percentage
I wonder if there is a way to modify my battery icon in order to present battery remaining in hours/minutes/etc and not in a percentage form</p>


问:
Cannot install Xposed in Yu(Yureka lollipo 5.0.2)
While flashing xposed framework via recovery it says that signature verification failed.
It uses 64 bit architecture.
We cannot use xposed installer apk because for lollipop version,manual flashing only supported.
Can anyone resove this?</p>


问:
Stop GOSMS from encrypting private messages
I use GOSMS app because it have Private Box Feature which i like the most, but now GOSMS encrypts the messages in private box.

I have to sometimes use the apps which show SMS(of phone) on Computer or in Browser, but private messages are not shown (even not in other apps) because they are being encrypted by GOSMS.

Is there any way that I can temporarily stop the encrypting feature (so SMS can be seen on PC OR BROWSER)?

Also, there are more then 25,000 messages in single conversation so I cant remove that Contact from Private Box because once remove it will start moving sms from private to normal list which will definitely take time, this is an option I am aware of, but don't want to use.


问:
application for changing fonts in android 4.3
Is there any appication by which you can change the fonts of your android, which it also supports greek language?

Unfortunatrlly, I don't own a well known brand, but somehow I managed to root it!


问:
Whatsapp not loading images nad not creating back up on my htc explorer (Cyanogen mod 11 CR4)
I have installed Cyanogen mod11 CR4 on my htc explorer.
Also I have increased my internal memory via partitioning the sd card and merging it with internal memory.

When I installed Whatsapp. It is not creating its folders (of conversations, images, videos). Due to this, I cannot download or upload images. Also it is not allowing to back up conversation.

Can anyone help me in this regard?
Thank you.


问:
Un-combining notifications on HTC M9/Lollipop?
On my HTC One M9 with Android Lollipop, notifications are combined by category. For example, if I have 3 emails and 5 text messages, the notification list will show two items - "3 new emails" and "5 new messages" (or however it's worded). This is great on the lock screen, but it's causing problems for my smartwatch, which will say I only have 2 notifications instead of 7. The smartwatch only lets me read full emails and texts through their notifications, and sometimes it will fail to load the bodies of emails when they have been combined into one notification. The notification settings on the smartwatch are not customizable so I can't adjust anything there.

Is there any way to stop Lollipop (or Sense, whichever is responsible) from combining notifications? I'd rather receive a separate notification for each text and email if that will make them easier to read on my watch.


问:
Bind camera button to Google Camera
I have just installed Google Camera on my Sony Z2 device and i would love to fully move to it from default xperia camera app but the only thing which stops me from this is a camera button which is binded to the default app.

I have stopped / disabled the default app in Apps settings and now, after holding that button, my device vibrates for half a second and nothing happens. I assume i need to somehow change it's binding or set Google Camera to the default app but i have no idea how to do that and i can't find anything about it on the internet. Any help much appreciated.

Title: Bind camera button to Google Camera


问:
Directly storing apps in SD Card
So I bought an 'Swees' Android phone recently, with ~150mb Internal storage + 4gb External SD Card.

I downloaded Android SDK manager on my mac, installed necessary packages and ran the 'adb' file in Terminal.

I set Default Storage Locaction to '2', (i.e. External Storage).

This was a success.

I have moved all my installed apps to SD Card (which I couldn't do before).

However, it seems I still have ~95% of Internal Memory used up.

When I download an app from the Play store it installs directly into the SD Card, which is what I want.

But when I install some apps (big file sizes) it will return an error, "insufficient storage space available".

I have >3.5GB available on my SD card.

Does the file have to be downloaded before it's installed on the SD card. And does it keep the downloaded file in Internal Memory?

I have no idea why else this is happening.

Title: Directly storing apps in SD Card


问:
In my android device when I take picture from camera, the image is reverting
I am using ASUS ZENFONE 4 - ASUS T00I, when I open camera and if I take any picture it is showing reverse image when I took image from Front camera  how can change that in settings , please suggest me </p>


问:
How to sync Android Firefox with my private ownCloud?
I have setup Firefox 38 (on my PC) synchronization with my private ownCloud server. I just had to add services.sync.tokenServerURI and services.sync.username strings in about:config (Mozilla and ownCloud). Now I can sync everything that Firefox offers to sync with my private cloud.

How to make the same for Firefox on Android?

I added those string on Android with no success.


问:
Find process causing io
I've been having some serious performance problems with my fairphone (wait times of 1 minute or more before apps open or switching apps, and general lack of responsiveness).

I installed System Monitor Lite, and it shows storage I/O maxing out (screen shot below).

Are there any tools I can use to trace which process(es) this I/O is coming from?

Title: Find process causing io


问:
RAM version in smartphone?
How can i find or check RAM version of my smartphone ,am using Samsung Galaxy,is there some secret code to find that?
Already i have tried the code : *#*#3264#*#*  but no help.
please help me sort this.

Title: RAM version in smartphone?


问:
is there a way to force chrome to accept a self signed site?
I want to access to a site in which zimbra is installed, the address is like 'https://...', but when I try to access it from chrome on my phone I have a message telling me the connection is not secured. Is there a way to force chrome to accept the encryption?

thanks

olivier


问:
Figure out why the "System" process on Android is using a lot of CPU
I have a Samsung Galaxy S5 with Android Lollipop.  My phone was feeling sluggish.  Using an app called "OS Monitor", I see that the "System" process (not to be confused with "Android System") is using a lot of CPU time.  The CPU percentage goes as high as 50% on a quad-core processor.

I looked at the Battery screen in settings and it says the "System" process  is using the most of the battery.  How do I figure out what inside "System" is consuming so much CPU time?  What app will reveal what is going on inside?

Rebooting the phone temporarily fixes the problem.

Note: The app or solution has to work on a non-rooted phone.

OwnerDisplayName: Nathan


问:
Is it possible to charge one discharged smartphone from other?
Suppose u are having 2 twin smartphones of same brand. one is fully charged and other one is fully discharged.

My question is that Is it possible to charge one discharged smartphone from fully charged other smartphone?


问:
How do I get Google Calendar event invitations through the Calendar app for Android?
In the webapp's settings, there's the option for email or SMS. In the Android settings, there's no option for event invitation notifications.

Is there a way to just get a notification from the Calendar app and no email?

OwnerDisplayName: willlma


问:
moto e not power on after update
While updating from KitKat 4.4.2 to 4.4.4 my moto e switched off.

During this process, the battery level was less than 50%. I've tried charging and nothing happened but if I press the power button while charging the notification LED blinks.

Please help me to fix this problem. Thanks.

Title: moto e not power on after update


问:
GPS and direction in Google Maps not working correct with S5
I have a Galaxy S5 and I am using Google Maps or Komoot to navigate with my bycicle. I am in the mode, so the map directs to where I am facing to. Walking works fine and cycling very slow too. But cycling above 15 km/h the map shakes around and its not working correct anymore.

Does anyone knows howto fix this or what is the problem ?


问:
Google+ is filling up my phone
I was running out of storage space on my phone, mainly due to photos, so I decided to sync all my pictures and "home movies" to Google+ and then delete all the photos/movies from my phone (deleting using the "On Device" option in the Photos app main menu) to recoup space.

This process didn't require much manual labor, but it did take a very long time. Unfortunately, the result was unsatisfactory because my phone is still nearly full. Now, when I look at how my device storage is being consumed, I see almost nothing under "Pictures, videos," but instead Google+ (which is now full of photos) is using up all my phone storage space.

So, in essence (and I believe I read this somewhere but can't find the link right now), it appears that Google+ is still keeping a copy of the photos on my phone, as part of the Google+ app. This doesn't do me much good in terms of clearing space on my phone. My intention with syncing to Google+ was to remove the photos completely from my mobile device.

My questions are

Is it possible to sync photos from my phone to Google+, delete
"On Device" photos through the Photos app, and have those photos
completely off my phone?

If I move all photos from my phone to my laptop and sync from my
laptop, will the Google+ app still fill up my phone? (I ask this
rather than try this because there are no more photos in the Photo
app on my phone and trying to recreate the sync scenario would take
even more time than it took me the first time.)

Is there another alternative that I am not considering? My
qualifications here would be that the service would have to offer
similar appealing features to Google+. Namely, unlimited (or a very
large amount) of photo storage, web-viewable photo pages, and the
ability to share photos with exactly whom you want to share with.

Title: Google+ is filling up my phone


问:
How can I prevent battery saver from disabling when the device is charging?
The battery saver functionality in Android 5.0 and 5.1 automatically turns itself off when the device is "charging". Unfortunately, when I'm charging my tablet from my car, most of the time the charge is insufficient to counter the drain on the battery so I would like battery saver to remain on even when charging.

Is this possible and if so, how can I achieve this?


问:
How to install a private key (.pfx certificate) on android?
I want to read a protected pdf file. I installed in on my Windows PC and install the .pfx certificate with the password to read it. There I can open it normally. But I can't do the same on my android tablet. When I install it, doesn't seem to be working. It doesn't even show up in the certificate list on the system settings.

Isn't there anyway to do the same on my Android tablet? To open it normally?


问:
Using adb to backup data on an unbootable & non-rooted phone that does not have USB Debugging turned on
I have a phone (Moto G) that won't boot & I had not turned the USB Debugging on when it used to boot correctly. The motivation is to use adb to get a full dump of the data on the phone before I try to resurrect it using fastboot commands that might be potentially data-destructive.

Is it still possible to somehow connect with adb from a PC + USB cable or it that option impossible now that I cannot access the menus that let me turn USB Debugging on?

Additional details of the problem I've posted on this related Android Stackexchange thread

Of course, if there's any way to backup a phone without using adb, that is welcome too. But I haven't seen anything like that yet.

Edit:

Phone isn't totally bricked. I get the initial splash screens of the Manufacturer's boot logo etc. & then it even does that initial vibrate. After that it goes blank (but backlight stays on) & just waits for ever.

If I connect it to a charger the LED blink & on-screen charging splash screen is also visible with the Charge %.

fastboot can connect to the phone but I haven't gotten adb to connect yet.


问:
High battery use by apps under location services. But location mode is set to battery saving
Under Settings > location in my phone, the apps listed under recent location requests say High battery use. However the location mode is set to Battery Saving (Networks only). I thought high battery use was only when GPS was on.
Does any one know how to fix this? I have tried turning location off and then on again.

Location history is off

Phone: LG G3 (international)


问:
Anonymous Battery Removal - Side effects
I am working with an embedded system with BeagleBone (White) as physical framework and Android JellyBean 4.1.2.

For some reasons I have to drop the entire power in the system (like anonymous battery removal).

Are there any side effects to doing this?

Like:

Issue with settings (not saving every time )

Database crash

or any other issues?


问:
Rooted phone, deleted Google apps, what upgrade options do I have?
Just wanted to know what options I have for updating/upgrading my Android OS, now that I have rooted it and deleted all the Google apps from the device?

It's about time it had an upgrade, but now that I've severed it from Google, is doing a factory reset the only alternative for me, should I want to upgrade the software?

Is there a way to make an image of my current install, should the factory reset fail?

Is there some alternative Android project available for users wishing to use Android without Google?

Grateful for any helpful and constructive advice.

Thanks

........................

Samsung GT-S7560 - Android 4.0.4


问:
Cannot enable USB mass storage (UMS) after changing internal SD card to emulated
After I changed internal SD card to emulated (previous was on it's own
partition) I cannot enable USB mass storage of internal card.
I got inspired by section "Emulated primary only (like Nexus 4)" in
https://source.android.com/devices/storage/config-example.html.

I'm trying to figure out what to change in vold.fstab to be able to enable USB mass storage.

I'm working on Allwinner A31s, on Android 4.2.2 Jelly Bean.

vold.fstab before my changes was (internal card was /mnt/sdcard):

```<code>dev_mount   sdcard  /mnt/sdcard auto    /devices/virtual/block/nandk
dev_mount   extsd   /mnt/extsd  auto    /devices/platform/sunxi-mmc.1/mmc_host  /devices/platform/sunxi-mmc.0/mmc_host
dev_mount   usbhost1    /mnt/usbhost1   auto    /devices/platform/sw-ehci.1 /devices/platform/sw_hcd_host0  /devices/platform/sw-ehci.2 /devices/platform/sw-ohci.1 /devices/platform/sw-ohci.2
</code>```

I removed the first line (for /mnt/sdcard). I also tried to add line:

```<code>dev_mount   sdcard  /mnt/shell/emulated     auto    /devices/platform/sw-ehci.1 /devices/platform/sw_hcd_host0  /devices/platform/sw-ehci.2 /devices/platform/sw-ohci.1 /devices/platform/sw-ohci.2
</code>```

but it didn't help.
I suppose it needs to be entry in vold.fstab for emulated devices as well. How to find correct sysfs_path?

I also changed attribute android:emulated to true in storage_list.xml.

UPDATE: The change in partition layout was to remove partition for internal SD card (/mnt/sdcard) and resize /data partition – add this free space to it. Internal SD card is mounted into /data partition (as /mnt/shell/emulated in /data/media).

It's done with sdcard service (defined in rc script):

```<code>service sdcard /system/bin/sdcard /data/media /mnt/shell/emulated 1023 1023
    class late_start
</code>```

I have probably some misconfiguration in storage_list.xml as UsbStorageActivity is shown, but after clicking to enable button does not finish enabling. But this is a minor problem, the main issue is the inability to set UMS.

When I watch vold with vdc   monitor it does nothing, prior to previous version when it worked as   expected - unmounting device and changing it's state). This happens also if  there is also external SD card presented.

Debugging with logcat shows that in case of emulated SD card:

PackageManager is not called

Vold is not called

MediaScannerReceiver is not called

MountService (runned in thread by UsbStorageActivity) skips both   internal  and partition (doesn't umount either of them) and progress indicator keeps running.


问:
Downloaded mp3 only plays for about 2 minutes. Is there a setting I have to change?
I've downloaded several mp3's so I can listen to them on my Samsung Galaxy S3. When I play them either through Google Play Music or Sound Player, I hear about 2 minutes of audio then it stops playing. I've attempted this with multiple mp3's. Is there a setting I need to change?</p>


问:
Nexus player does not wake up with TV
My nexus player does not wake up when I turn on my tv. On the tv it says it does not have signal.

If I unplug and plug the HDMI cable it works! This is a very annoying issue.

Do you know how to fix it?

What might be the problem? My TV, my HDMI cable or the nexus player?

Title: Nexus player does not wake up with TV


问:
Connect PlayStation gamepad to a nexus player
Is it possible to use the playstation gamepad in my nexus player?</p>


问:
Application messages
Need assistance. If I power on or restart my GT-P7500 10.1 Samsung tablet, it takes an awe full long time to become usable. It keeps coming up with messages like "Messager is not responding" - with pop up to "close or report or wait choice". This carries on for a while with pop ups for various apps before it becomes stable and usable. Even then occasionally a pop up still appears.
I have cleared no of apps so that only half of the 32Gig Mem (stil got 11.7 Gig free). Running

Any help will be appreciated as this is very frustrating

Title: Application messages


问:
Menus become cutoff and show as "..."
Sometimes when I go to open a menu item, it cuts off the text and I see '...'. Here it is happening on QkSMS but it happens on other apps too. Is there a way to fix it?

Here is a picture of it happening. I have an Xperia Z3 on T-Mobile running 4.4.4.

Screenshot (click image for larger variant)

Title: Menus become cutoff and show as "..."


问:
How can I set the Accelerometer Sensor Range?
The Accelerometer Sensor is set to a Range of 2 - 4 g on most devices.
There is no option to turn it up to 8 or 16 G, which my sensor and most others are capable of.
I found some information but can't get any further how to achieve this.

I have the LIS3DSH Sensor in my Xiaomi Device.

There is a manual which states that in the configuration .hal file you can set:

```<code>/* ACCELEROMETER SENSOR \*/
#define SENSOR_ACC_LABEL “LSM303DLHC 3-axis Accelerometer“
#define SENSOR_ACC_INCLUDE_FILE_NAME “lsm303dlhc.h“
#define SENSOR_DATANAME_ACCELEROMETER LSM303DLHC_ACC_DEV_NAME
#define ACCEL_DELAY_FILE_NAME “pollrate_ms“
#define ACCEL_ENABLE_FILE_NAME “enable_device”
#define ACCEL_RANGE_FILE_NAME “range”
#define ACCEL_MAX_RANGE 16*GRAVITY_EARTH
#define ACCEL_MAX_ODR 400
#define ACCEL_POWER_CONSUMPTION 0.033f
#define ACCEL_DEFAULT_FULLSCALE 4
</code>```

But I have no idea how to do this.

Resources to read:

Hardware abstraction layer for Android

Android accelerometer full range

I would be really glad if someone knows the way to go, or point me in the right direction for further research.


问:
Cannot boot into OS yureka
After flashing philz recovery through fastboot mode.Yureka doesn't neither boot into OS nor into recovery.(But battery less than 10%)
When turned on shows boot image and then a blank screen.If charger is connected,shows battery status  when phone is off.
Downloaded philz fromPhilz
And executed fastboot -i 0x1ebf flash recovery philz.img</p>

Title: Cannot boot into OS yureka


问:
Loading from External SD / Saving to ExtSD
I rooted my device, an Android off-brand tablet, and finally found a way to get all my files onto my 32gb SD card instead of the internal SD. However, it says my apps aren't installed now when I click on their icons. Also, new apps install to the internal SD and not the external, despite changing set-install-location to SD. (Tried to change the set-install-location to ExtSD but wouldn't do it.)

The whole point of  buying that SD card was because the space was so insufficient. It boasted 8gb of space plus a MicroSD jack, but I can only use half that space since it's partitioned, so I'm not going to be moving any of the apps back. There simply isn't space, and I'm not uninstalling apps I need/use often. I'm confident there's a workaround somehow. (Sorry, anything I'm finding on Google is people replying with "move it all back"  basically, and I'm getting annoyed.)

I was thinking either I could have Android just use the 32gb instead of it's own storage, and use the internal storage as "SD", i.e. swapping storage. I don't plan on ever removing the Micro SD, as I said, it was bought for this purpose. If that's not possible, maybe there's something I can do to tell Android, "Hey, all the apps are here"?

Thanks, this is endlessly frustrating!

PS: Using Android 4.4.2


问:
Disable disable option
Is it possible to disable the disable option for a system app?

For example, if I turned Google now launcher into a system app, the disable option is grayed out. However, if I do the same for Google keyboard, option to disable is still there. So is it possible to disable the disable option for an app?

Note: I have a  rooted Android lollipop device.

Title: Disable disable option


问:
Battery quickly discharged after installation of Lollipop
I have Samsung Galaxy Tab S 10.5. Recently I've updated it to Lollipop 5.0.2 through Odin. Then problem with battery have arisen: charge falls on one percent each three minutes when brightness is medium, 3G is on, screen is always on and music is enabled.

Does this problem really relate to possible confrontation with Lollipop?


问:
Cannot sync contacts from Google
My Moto G 1st gen running on Lollipop does not want to aggregate Google contacts from my contact.google.com list. The Contacts app does not allow me to import contacts from Google account. It also does not recognize the Google account in the Contacts > Menu > Accounts - I can see Facebook account and Skype account, but not the Google account (even when it is visible in the Settings > Accounts).

I cannot add any new account. When I click on the "Add account", it gives me the possibility to choose 2 "Exchange" accounts with the Gmail icon, but for both of them, when clicked, it says that there is already a Google account on the device.

I have tried to reinstall with no Facebook account introduced, does not work

I have tried to pass via Google+, it imported the contacts from Google+ without the phone numbers.

I have restored the SMS (backed up previously from my phone) and it does not recognize the sender (only the numbers),

It does recognize some of the callers, but it still asks whether to add them to contacts, so most probably it is not from my Google contacts.

reinstalls, reboots, reformat - all done.

Do you have any ideas?

Title: Cannot sync contacts from Google


问:
Bettery Saver setting not sticking
In Android Settings, under Battery, there is a setting called Battery Saver.

On multiple devices, changing that setting to On simply results in it changing back to Off within a few seconds.

What is causing this, and how can it be corrected?

Title: Bettery Saver setting not sticking


问:
Google photos displays pixelated images
Today I noticed that pictures (screenshots, pictures, etc) in my phone (LG F60) are displayed awfully. I use google photo. Until yesterday everything was fine but today i noticed that everything in google photos looks pixelated, like in low quality/ resolution.

Also... I uploaded a screenshot (which looks pixelated on google photos) to imgur, and it looks perfect, the same with every picture I see in the browser, if I download a picture I see it blurry in google photos.

Maybe due to a google+ update?? (Yesterday morning updated to a new version)

Thanks!

Title: Google photos displays pixelated images


问:
Android Lollipop Trusted Face Missing
So, I've been having this problem; I want to use Trusted face on my HTC One (M8) stock Android 5.1, but in Smart Lock, only these options come up:

Trusted devices

None

Trusted places

None

Trusted voice

On

On-body detection

Off

The option for Trusted face, isn't there, not even grayed out. In my Trust agents, Smart Lock (Google) is activated.

The only things I have done to the phone is root it, install TWRP recovery, and changed the DPI from 480 to 430. I don't think any of these are causing the issue, as I tested the default 480 DPI, and it was working fine on Lollipop 5.0.1.

Anyone know how to fix this? I'm going to perform a backup via TWRP, then factory reset to see if the feature is back, I'll keep you all updated.

Title: Android Lollipop Trusted Face Missing


问:
Android, connecting to a specific wireless channel
I live in a dorm where there is the same wireless network with different channels. How can I choose to which channel I want to be connected?

The problem is that channel 1, which has the best signal so gets automatically selected, is not working properly.

On my laptop I can just select the channel in wicd but I haven't found an app or possibility to connect only to specific channels in Android.

Android version is 5.0.2


问:
Softbricked phone
Alright, so I used this tutorial and after step 3 no my phone only boots up and says "Firmware upgrade encountered an issue. Please select recovery mode in Kies & try again"

So I tried installing the stock 4.4.2 and that didn't work, ended up with errors like Fused 3 > binary 1 and Something 2 > binary 1.

I should mention I got the Lollipop OTA update awhile ago, so I was all the way up to date. I'm guessing the issue here is that I'd need the stock image for the version I had before I started messing around, but as far as I can tell that's not available.

Not sure what to do here, but for now I'm completely cut off from communication so I could use some help!

I have the SM-G900A

Title: Softbricked phone


问:
Looking for a more efficient way to avoid apps that require creating online accounts
Here's an example of a recurring problem: I'm looking for a simple GPS-based pace-keeping app to keep me on track timewise while cycling, running, hiking, etc.  So I find a candidate app via the play store, if it's not free I buy it, then I install it and run it for the first time.  Then I discover that its use requires creating an account at some online site.  I find this unacceptable, so I delete the app, and go back to searching.

Of course, the whole maybe-purchase-install-start-uninstall cycle gets to be very time-consuming when the probability of success (i.e. finding an app that does not require an online account) is low.

In my ideal world, there would be a way to filter search results to exclude apps that require setting up an online account, but I'm not holding my breath for this feature.

Is there a way to identify those apps that require an online account before installing them?


问:
backup android-operating system
I am trying to backup the whole android OS with all kernel files, systemfiles, efs-data and more on my rooted samsung galaxy s3 but when I open the the backupfile (.ab)  on my computer i can only see two folders:

```<code> apps
 shared
</code>```

I used the following adb-switches

```<code> adb backup -apk -shared -all -f ~/Backups/i9300/s320150523.ab
</code>```

I cannot see any OS-parts in these folders such as libraries (.so files), kernelfiles, efs-folder and so on.

And when looking at the switches using adb-help it seems only be concerned with backup the apps and systemapps, not the OS-parts.

```<code> adb backup [-f <file>] [-apk|-noapk] [-shared|-noshared] [-all]
          [-system|-nosystem] [<packages...>]
        - write an archive of the device's data to <file>.
          If no -f option is supplied then the data is written
          to "backup.ab" in the current directory.
          (-apk|-noapk enable/disable backup of the .apks
             themselves in the archive; the default is noapk.)
          (-shared|-noshared enable/disable backup of the device's
             shared storage / SD card contents; the default is
             noshared.)
          (-all means to back up all installed applications)
          (-system|-nosystem toggles whether -all automatically
             includes system applications; the default is to
             include system apps)
          (<packages...> is the list of applications to be backed
             up. If the -all or -shared flags are passed, then the
             package list is optional. Applications explicitly
             given on the command line will be included even if
             -nosystem would ordinarily cause them to be omitted.)
</code>```

If it is so that adb cannot backup the whole image - what are the alternatives?
Could an app such as titanium-backup solve this issue?

Title: backup android-operating system


问:
Holding power button doesn't work on Nexus 4
My Nexus 4's power button's hold function is not working. I can lock my screen, but anything which involves me having to hold the power button isn't working.

I'm scared to even wait for my phone to drain all the battery and shut down because I have to hold the power button for it to start. I'm stuck.

Is this a hardware break or a software bug?


问:
How does the smart lock feature on Android define a trusted device?
The smart lock feature on Android allows someone to set a Bluetooth device as "trusted" which makes it easy to unlock. See for example: https://support.google.com/nexus/answer/6093922

I tried to add an Avantree Roxa device to play with this, but the log states:

```<code>I/Coffee - BluetoothTrustlet( 1549): Device Avantree Roxa is not allowed because it is either insecure or of unknown security and needs user confirmation
</code>```

What makes a device secure or not unknown anymore? I have paired with this device multiple times to stream audio. There doesn't seem to be a place where "user confirmation" is possible. Anyone knows how this is implemented?

OwnerDisplayName: Anne van Rossum


问:
How to play youtube in the background in android?
I have been using PVSTAR+ app which plaeyed youtube in the background and I could listen to youtube while its closed.

Youtube recently updated it's API so PVSTAR+ doesnt work anymore.
it's also have been deleted from the store so I wont get any updates.

Is there an app that play youtube in the background and works now?
And I dont want to use AudioPocket-it can't search youtube.

Thanks.

OwnerDisplayName: BestArmy


问:
Sony Xperia E can't install apps caused by storage problems
I've got a problen with my Sony Xperia E (Android 4.1.1.).
In the settings it says there's still 1.37 Gb free storage but when trying to install an app (about 20mb) from google play I just get an error telling me there's not enought free storage left. I don't have root and I don't want to root my device.

I know this problem has been discussed several times on the internet and here in the forum but I couldn't find a working solution.

I'm hoping anyone can help.

Regards
Nils


问:
USB debugging enabled on phone, but can't debug apps
I am using a custom ROM on my device (MIUI), and I have enabled USB debugging in Settings, but still, when I connect my phone to my laptop and try to debug apps, it is not showing my device.

This is not an issue with other custom ROMs. I am facing this problem in MIUI only. Any workaround on how to enable USB debugging, without flashing another ROM, as this one serves my purpose correctly (only USB debugging not working).
Any help would be appreciated.


问:
Command to delete full sentences or dictation session?
Is there a way to delete entire sentences when using voice recognition? Perhaps the functionality I am asking about doesn't even exists? </p>


问:
Found this amazing app on playstore, but how secure is it?
Today I came across a app on play store called RLWatcher. It is an amazing app which could come in handy in a lot of situations. It lets the user remotely sense movement, sound or even just the slightest motion of the phone and record audio or video for a specified amount of time. It then sends the recording as a email or uploads it to a ftp server. It is amazing!

But I am concerned about my privacy and this app seems a bit fishy. For one thing, the developer of the app could use this app to spy on the user. It could upload video/audio to a third location. Also for getting the recoded clip as an email, we are to submit our gmail account and password. Will my password be safe? Also it is to be noted that the app crashed a lot.

Does Google offer any protection from possible fraud of this type? Will you trust this app if you were in my place? How do you verify?


问:
Phone doesn't power up while charging, cannot unbrick because of this
I've got a LG Optimus L7 which is in a bricked state because of a failed ClockworkMod upgrade some months ago.

I am trying make it work again, but I cannot undergo the process of unbricking since the phone does not get past the LG logo when connected to power. This is true when its battery is removed and for when it's not.

The only way that it doesn't get stuck at the LG logo phase is when I hold the volume up key while connecting it to power, but that only boots to emergency mode, which is used for step 1 of the unbricking process. For step 2 of the KDZ LG phone update, it needs to boot in non-emergency mode.

Any ideas?


问:
usb keyboard detected but wont work
As the title says, I have a USB keyboard setup on my tablet and it shows it in the input section, but it won't work.

It worked fine for a while but one day it just stopped working. I've tried 3 different keyboards.

The tablet is an Ellipsis 7. Up to date

Title: usb keyboard detected but wont work


问:
Recover files from encrypted Android MMC dump
A friend of mine gave me his Samsung Galaxy S2 (with Cyanogenmod 10.1.3 installed and Full Disk Encryption enabled) because it bootlooped.

I made a dump of mmcblk0 (the internal Flash memory) just for safety.
While dumping the phone died completely and now only shows the first bootscreen and doesn't go anywhere.

Now I am trying to recover everything possible from the flashdump but testdisk does only see 3 partitions:

```<code>GUID Partition Table (EFI)
Offset Sector: 0
Units are in 512-byte sectors

     Slot    Start        End          Length       Description
00:  Meta    0000000000   0000000000   0000000001   Safety Table
01:  -----   0000000000   0000008191   0000008192   Unallocated
02:  Meta    0000000001   0000000001   0000000001   GPT Header
03:  Meta    0000000002   0000000033   0000000032   Partition Table
04:  00      0000008192   0000049151   0000040960
05:  -----   0000049152   0000106495   0000057344   Unallocated
06:  01      0000106496   0000311295   0000204800
07:  -----   0000311296   0000344063   0000032768   Unallocated
08:  02      0000344064   0001392639   0001048576
09:  -----   0001392640   0027419439   0026026800   Unallocated
</code>```

Is there any way to find the encryption keys and decrypt the data that got copied to my PC before the phone died?

ContentLicense: CC BY-SA 4.0


问:
Samsung Galaxy Nexus keeps rebooting in Cyanogenmod 11 as well as in CWM recovery. How to backup data, or repair the ROM?
I have a Samsung Galaxy Nexus. I have installed CM11 a while ago, but for about a week it keeps rebooting too often; it stays on for about 10-15 seconds, and then reboots.

I haven't installed anything suspicious in it. I just noticed that I can't update it to the latest version; I don't know why.

So I tried few things to backup my phone and wipe it with fastboot; tried to update to newest version of CM11 from CWM, but without any luck. It even keeps rebooting if I am in CWM.

Can you guys point me in the right direction? Maybe I am missing something. I keep searching for solutions, but cannot find any idea about how I can backup it, or maybe repair the ROM. I just need the Contacts and Photos from the phone.

adb logcat http://pastebin.com/S2RjfWmA


问:
How Recover deleted data from internal memory of non rooted Moto G device?
This is my first post here :). My question is to recover accidentally deleted data from a Moto G (the device is not rooted and has Android 4.4.4 inside) with avoiding any potential data loss.

So the trivial question will be must I absolutly root my device I'm asking that because the tool (Dr.Fone for Android) prompt me a message so that device must be rooted and it not succeed to recover deleted data. So if rooting is mandatory how achieve this without loss any data ?

Unfortunatly Moto-G seems to need a custom boot. I heard about clockworkmod, what if I cutom the boot of my device, can I still get my deleted data back after this operation

Suggestion may be clone internal memory of device with adb tool then use a data recovery tool :so my question will be first how backup internal memory of the device or clone it ?

Thank you in advance