i just want to ask i want to make googlemaps apps on android..
i have follow instruction from many website (include from google developer) but the apps doesn't work on my real device (on Android 4.2.2) can anyone help me? Please..
The Code Look Like This.

xml file :

```
 <?xml version="1.0" encoding="utf-8"?>
 <fragment 
     xmlns:android="http://schemas.android.com/apk/res/android"
      android:id="@+id/map"
      android:layout_width="match_parent"
      android:layout_height="match_parent"
      android:name="com.google.android.gms.maps.MapFragment"/>

```

The AndroidManifest file :

```
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.wilis.googlemaps"
android:versionCode="1"
android:versionName="1.0" >

<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
<uses-permission 
android:name="com.google.android.providers.gsf.permission.READ_GSERVICES"/>
<!-- The following two permissions are not required to use
 Google Maps Android API v2, but are recommended. -->
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>

<uses-feature
    android:glEsVersion="0x00020000"
    android:required="true"/>
<uses-sdk
    android:minSdkVersion="8"
    android:targetSdkVersion="17" />
    <application
    android:allowBackup="true"
    android:icon="@drawable/ic_launcher"
    android:label="@string/app_name"
    android:theme="@style/AppTheme" >    
<meta-data
android:name="com.google.android.gms.version"
android:value="@integer/google_play_services_version" />
    <activity
        android:name="com.wilis.googlemaps.GoogleMaps"
        android:label="@string/app_name" >
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />
            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>
<meta-data
android:name="com.google.android.maps.v2.API_KEY"
android:value="AIzaSyAOGow0GmvoOi87cCFQffmRVz4SNmEWnP0"/>

</application>    
</manifest>

```

And The Main Activity file :

```
package com.wilis.googlemaps;

import android.os.Bundle;
import android.app.Activity;

public class GoogleMaps extends Activity {

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);

}

}

```