title: My PreferenceActivity does not show up, even though it is in my manifest file
body: <p>So I am modifying the Cube live wallpaper example.  I have a class that extends PreferenceActivity, and I added the Activity in my manifest file.  I keep getting ActivityNotFoundExceptions.</p>
  
  <p>Here is my preference class : </p>
  
  <pre><code>package com.p.t.wallpapers.mywallpaper;
  
  import com.p.t.wallpapers.mywallpaper.R;
  import android.content.SharedPreferences;
  import android.os.Bundle;
  import android.preference.PreferenceActivity;
  
  public class MySettingsActivity extends PreferenceActivity
  implements SharedPreferences.OnSharedPreferenceChangeListener {
  
  @Override
  protected void onCreate(Bundle bundle) {
      super.onCreate(bundle);
      getPreferenceManager().setSharedPreferencesName(
              ParticleCandy.SHARED_PREFS_NAME);
      addPreferencesFromResource(R.xml.settings);
      getPreferenceManager().getSharedPreferences().registerOnSharedPreferenceChangeListener(
              this);
  }
  
  @Override
  protected void onResume() {
      super.onResume();
  }
  
  @Override
  protected void onDestroy() {
      getPreferenceManager().getSharedPreferences().unregisterOnSharedPreferenceChangeListener(
              this);
      super.onDestroy();
  }
  
  public void onSharedPreferenceChanged(SharedPreferences sharedPreferences,
          String key) {
  }
  </code></pre>
  
  <p>}</p>
  
  <p>And here is my manifest file</p>
  
  <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
  &lt;manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.p.t.wallpapers.mywallpaper"
    android:versionCode="1"
    android:versionName="1.0"&gt;
  &lt;application android:icon="@drawable/icon" android:label="@string/app_name"&gt;
  &lt;service 
   android:label="@string/app_name" 
   android:name=".MyWallpaper" 
   android:permission="android.permission.BIND_WALLPAPER" &gt;
   &lt;intent-filter&gt;
    &lt;action 
     android:name="android.service.wallpaper.WallpaperService"&gt;
    &lt;/action&gt;
  &lt;/intent-filter&gt;
  &lt;meta-data 
      android:name="android.service.wallpaper" 
      android:resource="@xml/wallpaper_info" /&gt;  
  &lt;/service&gt;
  
  &lt;activity
    android:label="@string/settings_title"
      android:name=".MySettingsActivity"
      android:theme="@android:style/Theme.Light.WallpaperSettings"
     android:exported="true"&gt;
  &lt;/activity&gt;
  
  &lt;/application&gt;
  &lt;uses-sdk android:minSdkVersion="7" /&gt;
  &lt;uses-feature android:name="android.software.live_wallpaper" /&gt;
  &lt;/manifest&gt; 
  </code></pre>
  
  <p>Any ideas why my preferences activity doesn't get read in from the manifest?  The wallpaper service, MyWallpaper shows up just fine, but DDMS keeps telling me the activity MySettingsActivity doesn't exit.</p>
  
  <p>Here is output from logcat</p>
  
  <pre><code>04-11 00:22:19.617: INFO/ActivityManager(57): Starting activity: Intent { cmp=com.android.wallpaper.livepicker/.LiveWallpaperPreview (has extras) }
  04-11 00:22:21.796: INFO/ActivityManager(57): Displayed activity com.android.wallpaper.livepicker/.LiveWallpaperPreview: 2111 ms (total 2111 ms)
  04-11 00:22:25.667: DEBUG/dalvikvm(375): GC freed 4745 objects / 316576 bytes in 192ms
  04-11 00:22:25.727: INFO/ActivityManager(57): Starting activity: Intent { cmp=com.p.t.wallpapers.mywallpaper/MySettingsActivity (has extras) }
  04-11 00:22:25.757: DEBUG/AndroidRuntime(375): Shutting down VM
  04-11 00:22:25.768: WARN/dalvikvm(375): threadid=3: thread exiting with uncaught exception (group=0x4001b188)
  04-11 00:22:25.787: ERROR/AndroidRuntime(375): Uncaught handler: thread main exiting due to uncaught exception
  04-11 00:22:25.847: ERROR/AndroidRuntime(375): java.lang.IllegalStateException: Could not execute method of the activity
  04-11 00:22:25.847: ERROR/AndroidRuntime(375):     at android.view.View$1.onClick(View.java:2031)
  04-11 00:22:25.847: ERROR/AndroidRuntime(375):     at android.view.View.performClick(View.java:2364)
  04-11 00:22:25.847: ERROR/AndroidRuntime(375):     at android.view.View.onTouchEvent(View.java:4179)
  04-11 00:22:25.847: ERROR/AndroidRuntime(375):     at android.widget.TextView.onTouchEvent(TextView.java:6540)
  04-11 00:22:25.847: ERROR/AndroidRuntime(375):     at android.view.View.dispatchTouchEvent(View.java:3709)
  04-11 00:22:25.847: ERROR/AndroidRuntime(375):     at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:884)
  04-11 00:22:25.847: ERROR/AndroidRuntime(375):     at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:884)
  04-11 00:22:25.847: ERROR/AndroidRuntime(375):     at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:884)
  04-11 00:22:25.847: ERROR/AndroidRuntime(375):     at com.android.internal.policy.impl.PhoneWindow$DecorView.superDispatchTouchEvent(PhoneWindow.java:1659)
  04-11 00:22:25.847: ERROR/AndroidRuntime(375):     at com.android.internal.policy.impl.PhoneWindow.superDispatchTouchEvent(PhoneWindow.java:1107)
  04-11 00:22:25.847: ERROR/AndroidRuntime(375):     at com.android.wallpaper.livepicker.LiveWallpaperPreview.dispatchTouchEvent(LiveWallpaperPreview.java:199)
  04-11 00:22:25.847: ERROR/AndroidRuntime(375):     at com.android.internal.policy.impl.PhoneWindow$DecorView.dispatchTouchEvent(PhoneWindow.java:1643)
  04-11 00:22:25.847: ERROR/AndroidRuntime(375):     at android.view.ViewRoot.handleMessage(ViewRoot.java:1691)
  04-11 00:22:25.847: ERROR/AndroidRuntime(375):     at android.os.Handler.dispatchMessage(Handler.java:99)
  04-11 00:22:25.847: ERROR/AndroidRuntime(375):     at android.os.Looper.loop(Looper.java:123)
  04-11 00:22:25.847: ERROR/AndroidRuntime(375):     at android.app.ActivityThread.main(ActivityThread.java:4363)
  04-11 00:22:25.847: ERROR/AndroidRuntime(375):     at java.lang.reflect.Method.invokeNative(Native Method)
  04-11 00:22:25.847: ERROR/AndroidRuntime(375):     at java.lang.reflect.Method.invoke(Method.java:521)
  04-11 00:22:25.847: ERROR/AndroidRuntime(375):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:860)
  04-11 00:22:25.847: ERROR/AndroidRuntime(375):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618)
  04-11 00:22:25.847: ERROR/AndroidRuntime(375):     at dalvik.system.NativeStart.main(Native Method)
  04-11 00:22:25.847: ERROR/AndroidRuntime(375): Caused by: java.lang.reflect.InvocationTargetException
  04-11 00:22:25.847: ERROR/AndroidRuntime(375):     at com.android.wallpaper.livepicker.LiveWallpaperPreview.configureLiveWallpaper(LiveWallpaperPreview.java:113)
  04-11 00:22:25.847: ERROR/AndroidRuntime(375):     at java.lang.reflect.Method.invokeNative(Native Method)
  04-11 00:22:25.847: ERROR/AndroidRuntime(375):     at java.lang.reflect.Method.invoke(Method.java:521)
  04-11 00:22:25.847: ERROR/AndroidRuntime(375):     at android.view.View$1.onClick(View.java:2026)
  04-11 00:22:25.847: ERROR/AndroidRuntime(375):     ... 20 more
  04-11 00:22:25.847: ERROR/AndroidRuntime(375): Caused by: android.content.ActivityNotFoundException: Unable to find explicit activity class {com.p.t.wallpapers.mywallpaper/MySettingsActivity}; have you declared this activity in your AndroidManifest.xml?
  04-11 00:22:25.847: ERROR/AndroidRuntime(375):     at android.app.Instrumentation.checkStartActivityResult(Instrumentation.java:1404)
  04-11 00:22:25.847: ERROR/AndroidRuntime(375):     at android.app.Instrumentation.execStartActivity(Instrumentation.java:1378)
  04-11 00:22:25.847: ERROR/AndroidRuntime(375):     at android.app.Activity.startActivityForResult(Activity.java:2749)
  04-11 00:22:25.847: ERROR/AndroidRuntime(375):     at android.app.Activity.startActivity(Activity.java:2855)
  04-11 00:22:25.847: ERROR/AndroidRuntime(375):     ... 24 more
  04-11 00:22:25.917: INFO/Process(57): Sending signal. PID: 375 SIG: 3
  04-11 00:22:25.917: INFO/dalvikvm(375): threadid=7: reacting to signal 3
  04-11 00:22:25.988: ERROR/ActivityThread(57): Failed to find provider info for android.server.checkin
  04-11 00:22:26.012: ERROR/Checkin(57): Error reporting crash: java.lang.IllegalArgumentException: Unknown URL content://android.server.checkin/crashes
  04-11 00:22:26.044: INFO/dalvikvm(375): Wrote stack trace to '/data/anr/traces.txt'
  04-11 00:22:29.307: INFO/Process(375): Sending signal. PID: 375 SIG: 9
  04-11 00:22:29.516: INFO/ActivityManager(57): Process android.process.acore (pid 375) has died.
  04-11 00:22:29.516: INFO/WindowManager(57): WIN DEATH: Window{44dd50d8 Media:com.android.wallpaper.livepicker/com.android.wallpaper.livepicker.LiveWallpaperPreview paused=false}
  04-11 00:22:29.576: INFO/WindowManager(57): WIN DEATH: Window{44d660f8 com.android.wallpaper.livepicker/com.android.wallpaper.livepicker.LiveWallpaperListActivity paused=false}
  04-11 00:22:29.586: INFO/WindowManager(57): WIN DEATH: Window{44dbe2f0 com.android.wallpaper.livepicker/com.android.wallpaper.livepicker.LiveWallpaperPreview paused=false}
  04-11 00:22:29.876: INFO/ActivityManager(57): Start proc android.process.acore for activity com.android.wallpaper.livepicker/.LiveWallpaperListActivity: pid=421 uid=10022 gids={}
  04-11 00:22:30.687: DEBUG/ddm-heap(421): Got feature list request
  04-11 00:22:30.957: INFO/UsageStats(57): Unexpected resume of com.android.wallpaper.livepicker while already resumed in com.android.wallpaper.livepicker
  04-11 00:22:31.756: WARN/ResourceType(421): getEntry failing because entryIndex 2 is beyond type entryCount 2
  04-11 00:22:31.768: WARN/ResourceType(421): Failure getting entry for 0x7f040002 (t=3 e=2) in package 0: 0x80000001
  04-11 00:22:32.758: WARN/InputManagerService(57): Got RemoteException sending setActive(false) notification to pid 375 uid 10022
  04-11 00:22:33.137: INFO/ActivityManager(57): Displayed activity com.android.wallpaper.livepicker/.LiveWallpaperListActivity: 3430 ms (total 3430 ms)
  04-11 00:22:33.528: ERROR/gralloc(57): [unregister] handle 0x467ae8 still locked (state=40000001)
  04-11 00:22:38.368: DEBUG/dalvikvm(364): GC freed 611 objects / 51656 bytes in 179ms
  </code></pre>
  
  <p>Updated logcat</p>
  
  <pre><code>04-11 01:10:52.976: INFO/ActivityManager(57): Starting activity: Intent { act=android.intent.action.CHOOSER cmp=android/com.android.internal.app.ChooserActivity (has extras) }
  04-11 01:10:53.668: WARN/InputManagerService(57): Window already focused, ignoring focus gain of: com.android.internal.view.IInputMethodClient$Stub$Proxy@44db02f8
  04-11 01:10:54.587: INFO/ActivityManager(57): Displayed activity android/com.android.internal.app.ChooserActivity: 1140 ms (total 17760 ms)
  04-11 01:10:56.458: INFO/ActivityManager(57): Starting activity: Intent { act=android.intent.action.SET_WALLPAPER flg=0x3000000 cmp=com.android.wallpaper.livepicker/.LiveWallpaperListActivity }
  04-11 01:10:57.466: DEBUG/dalvikvm(1622): GC freed 1487 objects / 106648 bytes in 167ms
  04-11 01:10:57.556: WARN/ResourceType(1622): getEntry failing because entryIndex 2 is beyond type entryCount 2
  04-11 01:10:57.587: WARN/ResourceType(1622): Failure getting entry for 0x7f040002 (t=3 e=2) in package 0: 0x80000001
  04-11 01:10:58.516: INFO/ActivityManager(57): Displayed activity com.android.wallpaper.livepicker/.LiveWallpaperListActivity: 1625 ms (total 1625 ms)
  04-11 01:11:00.717: INFO/ActivityManager(57): Starting activity: Intent { cmp=com.android.wallpaper.livepicker/.LiveWallpaperPreview (has extras) }
  04-11 01:11:02.948: INFO/ActivityManager(57): Displayed activity com.android.wallpaper.livepicker/.LiveWallpaperPreview: 2187 ms (total 2187 ms)
  04-11 01:11:11.538: INFO/ActivityManager(57): Starting activity: Intent { cmp=com.p.t.wallpapers.mywallpaper/MySettingsActivity (has extras) }
  04-11 01:11:11.577: DEBUG/AndroidRuntime(1622): Shutting down VM
  04-11 01:11:11.587: WARN/dalvikvm(1622): threadid=3: thread exiting with uncaught exception (group=0x4001b188)
  04-11 01:11:11.597: ERROR/AndroidRuntime(1622): Uncaught handler: thread main exiting due to uncaught exception
  04-11 01:11:11.667: ERROR/AndroidRuntime(1622): java.lang.IllegalStateException: Could not execute method of the activity
  04-11 01:11:11.667: ERROR/AndroidRuntime(1622):     at android.view.View$1.onClick(View.java:2031)
  04-11 01:11:11.667: ERROR/AndroidRuntime(1622):     at android.view.View.performClick(View.java:2364)
  04-11 01:11:11.667: ERROR/AndroidRuntime(1622):     at android.view.View.onTouchEvent(View.java:4179)
  04-11 01:11:11.667: ERROR/AndroidRuntime(1622):     at android.widget.TextView.onTouchEvent(TextView.java:6540)
  04-11 01:11:11.667: ERROR/AndroidRuntime(1622):     at android.view.View.dispatchTouchEvent(View.java:3709)
  04-11 01:11:11.667: ERROR/AndroidRuntime(1622):     at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:884)
  04-11 01:11:11.667: ERROR/AndroidRuntime(1622):     at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:884)
  04-11 01:11:11.667: ERROR/AndroidRuntime(1622):     at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:884)
  04-11 01:11:11.667: ERROR/AndroidRuntime(1622):     at com.android.internal.policy.impl.PhoneWindow$DecorView.superDispatchTouchEvent(PhoneWindow.java:1659)
  04-11 01:11:11.667: ERROR/AndroidRuntime(1622):     at com.android.internal.policy.impl.PhoneWindow.superDispatchTouchEvent(PhoneWindow.java:1107)
  04-11 01:11:11.667: ERROR/AndroidRuntime(1622):     at com.android.wallpaper.livepicker.LiveWallpaperPreview.dispatchTouchEvent(LiveWallpaperPreview.java:199)
  04-11 01:11:11.667: ERROR/AndroidRuntime(1622):     at com.android.internal.policy.impl.PhoneWindow$DecorView.dispatchTouchEvent(PhoneWindow.java:1643)
  04-11 01:11:11.667: ERROR/AndroidRuntime(1622):     at android.view.ViewRoot.handleMessage(ViewRoot.java:1691)
  04-11 01:11:11.667: ERROR/AndroidRuntime(1622):     at android.os.Handler.dispatchMessage(Handler.java:99)
  04-11 01:11:11.667: ERROR/AndroidRuntime(1622):     at android.os.Looper.loop(Looper.java:123)
  04-11 01:11:11.667: ERROR/AndroidRuntime(1622):     at android.app.ActivityThread.main(ActivityThread.java:4363)
  04-11 01:11:11.667: ERROR/AndroidRuntime(1622):     at java.lang.reflect.Method.invokeNative(Native Method)
  04-11 01:11:11.667: ERROR/AndroidRuntime(1622):     at java.lang.reflect.Method.invoke(Method.java:521)
  04-11 01:11:11.667: ERROR/AndroidRuntime(1622):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:860)
  04-11 01:11:11.667: ERROR/AndroidRuntime(1622):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618)
  04-11 01:11:11.667: ERROR/AndroidRuntime(1622):     at dalvik.system.NativeStart.main(Native Method)
  04-11 01:11:11.667: ERROR/AndroidRuntime(1622): Caused by: java.lang.reflect.InvocationTargetException
  04-11 01:11:11.667: ERROR/AndroidRuntime(1622):     at com.android.wallpaper.livepicker.LiveWallpaperPreview.configureLiveWallpaper(LiveWallpaperPreview.java:113)
  04-11 01:11:11.667: ERROR/AndroidRuntime(1622):     at java.lang.reflect.Method.invokeNative(Native Method)
  04-11 01:11:11.667: ERROR/AndroidRuntime(1622):     at java.lang.reflect.Method.invoke(Method.java:521)
  04-11 01:11:11.667: ERROR/AndroidRuntime(1622):     at android.view.View$1.onClick(View.java:2026)
  04-11 01:11:11.667: ERROR/AndroidRuntime(1622):     ... 20 more
  04-11 01:11:11.667: ERROR/AndroidRuntime(1622): Caused by: android.content.ActivityNotFoundException: Unable to find explicit activity class {com.p.t.wallpapers.mywallpaper/MySettingsActivity}; have you declared this activity in your AndroidManifest.xml?
  04-11 01:11:11.667: ERROR/AndroidRuntime(1622):     at android.app.Instrumentation.checkStartActivityResult(Instrumentation.java:1404)
  04-11 01:11:11.667: ERROR/AndroidRuntime(1622):     at android.app.Instrumentation.execStartActivity(Instrumentation.java:1378)
  04-11 01:11:11.667: ERROR/AndroidRuntime(1622):     at android.app.Activity.startActivityForResult(Activity.java:2749)
  04-11 01:11:11.667: ERROR/AndroidRuntime(1622):     at android.app.Activity.startActivity(Activity.java:2855)
  04-11 01:11:11.667: ERROR/AndroidRuntime(1622):     ... 24 more
  04-11 01:11:11.748: INFO/Process(57): Sending signal. PID: 1622 SIG: 3
  04-11 01:11:11.748: INFO/dalvikvm(1622): threadid=7: reacting to signal 3
  04-11 01:11:11.827: INFO/dalvikvm(1622): Wrote stack trace to '/data/anr/traces.txt'
  04-11 01:11:11.858: ERROR/ActivityThread(57): Failed to find provider info for android.server.checkin
  04-11 01:11:11.877: ERROR/Checkin(57): Error reporting crash: java.lang.IllegalArgumentException: Unknown URL content://android.server.checkin/crashes
  04-11 01:11:13.788: DEBUG/dalvikvm(101): GC freed 3389 objects / 203632 bytes in 2805ms
  04-11 01:11:16.787: INFO/Process(1622): Sending signal. PID: 1622 SIG: 9
  04-11 01:11:17.037: INFO/ActivityManager(57): Process android.process.acore (pid 1622) has died.
  04-11 01:11:17.046: INFO/WindowManager(57): WIN DEATH: Window{44db47b0 Media:com.android.wallpaper.livepicker/com.android.wallpaper.livepicker.LiveWallpaperPreview paused=false}
  04-11 01:11:17.107: INFO/WindowManager(57): WIN DEATH: Window{44db7138 com.android.wallpaper.livepicker/com.android.wallpaper.livepicker.LiveWallpaperListActivity paused=false}
  04-11 01:11:17.208: INFO/WindowManager(57): WIN DEATH: Window{44da6860 com.android.wallpaper.livepicker/com.android.wallpaper.livepicker.LiveWallpaperPreview paused=false}
  04-11 01:11:17.426: INFO/ActivityManager(57): Start proc android.process.acore for activity com.android.wallpaper.livepicker/.LiveWallpaperListActivity: pid=1647 uid=10022 gids={}
  04-11 01:11:18.266: DEBUG/dalvikvm(30): GC freed 222 objects / 8512 bytes in 799ms
  04-11 01:11:18.577: DEBUG/ddm-heap(1647): Got feature list request
  04-11 01:11:18.686: DEBUG/dalvikvm(30): GC freed 2 objects / 56 bytes in 406ms
  04-11 01:11:19.037: INFO/UsageStats(57): Unexpected resume of com.android.wallpaper.livepicker while already resumed in com.android.wallpaper.livepicker
  04-11 01:11:19.367: DEBUG/dalvikvm(30): GC freed 2 objects / 56 bytes in 652ms
  04-11 01:11:19.827: WARN/ResourceType(1647): getEntry failing because entryIndex 2 is beyond type entryCount 2
  04-11 01:11:19.837: WARN/ResourceType(1647): Failure getting entry for 0x7f040002 (t=3 e=2) in package 0: 0x80000001
  04-11 01:11:20.378: WARN/InputManagerService(57): Got RemoteException sending setActive(false) notification to pid 1622 uid 10022
  04-11 01:11:20.737: INFO/ActivityManager(57): Displayed activity com.android.wallpaper.livepicker/.LiveWallpaperListActivity: 3496 ms (total 3496 ms)
  04-11 01:11:21.117: ERROR/gralloc(57): [unregister] handle 0x448168 still locked (state=40000001)
  04-11 01:23:24.496: DEBUG/dalvikvm(98): GC freed 12398 objects / 575024 bytes in 213ms
  </code></pre>