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POApp can't start on Android 2.3
 

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  1. POApp can't start on Android 2.3
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    <p>My app doesn't want to start on Android 2.3 even though I made it for minimum 2.2, here is the LogCat. I tested in on both the emulator and on a device with 2.3 Android, it doesn't run at all, but on my other device with 4.0 it run's just fine... What could be wrong?</p> <pre><code>04-16 13:18:40.982: D/dalvikvm(6191): GC_CONCURRENT freed 41K, 49% free 2761K/5379K, external 3443K/4300K, paused 3ms+42ms 04-16 13:18:41.652: D/dalvikvm(6191): GC_CONCURRENT freed 1K, 49% free 2761K/5379K, external 4643K/4643K, paused 2ms+10ms 04-16 13:18:41.942: D/AndroidRuntime(6191): Shutting down VM 04-16 13:18:41.942: W/dalvikvm(6191): threadid=1: thread exiting with uncaught exception (group=0x2aac8578) 04-16 13:18:41.952: E/AndroidRuntime(6191): FATAL EXCEPTION: main 04-16 13:18:41.952: E/AndroidRuntime(6191): java.lang.RuntimeException: Unable to resume activity {spec.sartheris.myapp/spec.sartheris.myapp.MainActivity}: java.lang.NullPointerException 04-16 13:18:41.952: E/AndroidRuntime(6191): at android.app.ActivityThread.performResumeActivity(ActivityThread.java:2141) 04-16 13:18:41.952: E/AndroidRuntime(6191): at android.app.ActivityThread.handleResumeActivity(ActivityThread.java:2156) 04-16 13:18:41.952: E/AndroidRuntime(6191): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1680) 04-16 13:18:41.952: E/AndroidRuntime(6191): at android.app.ActivityThread.access$1500(ActivityThread.java:121) 04-16 13:18:41.952: E/AndroidRuntime(6191): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:943) 04-16 13:18:41.952: E/AndroidRuntime(6191): at android.os.Handler.dispatchMessage(Handler.java:99) 04-16 13:18:41.952: E/AndroidRuntime(6191): at android.os.Looper.loop(Looper.java:130) 04-16 13:18:41.952: E/AndroidRuntime(6191): at android.app.ActivityThread.main(ActivityThread.java:3701) 04-16 13:18:41.952: E/AndroidRuntime(6191): at java.lang.reflect.Method.invokeNative(Native Method) 04-16 13:18:41.952: E/AndroidRuntime(6191): at java.lang.reflect.Method.invoke(Method.java:507) 04-16 13:18:41.952: E/AndroidRuntime(6191): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:866) 04-16 13:18:41.952: E/AndroidRuntime(6191): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:624) 04-16 13:18:41.952: E/AndroidRuntime(6191): at dalvik.system.NativeStart.main(Native Method) 04-16 13:18:41.952: E/AndroidRuntime(6191): Caused by: java.lang.NullPointerException 04-16 13:18:41.952: E/AndroidRuntime(6191): at spec.sartheris.myapp.MainActivity.onResume(MainActivity.java:47) 04-16 13:18:41.952: E/AndroidRuntime(6191): at android.app.Instrumentation.callActivityOnResume(Instrumentation.java:1150) 04-16 13:18:41.952: E/AndroidRuntime(6191): at android.app.Activity.performResume(Activity.java:3832) 04-16 13:18:41.952: E/AndroidRuntime(6191): at android.app.ActivityThread.performResumeActivity(ActivityThread.java:2131) 04-16 13:18:41.952: E/AndroidRuntime(6191): ... 12 more 04-16 13:18:42.002: D/dalvikvm(6191): GC_CONCURRENT freed 54K, 49% free 2775K/5379K, external 2543K/5243K, paused 2ms+13ms </code></pre> <p>here is the code in MainActivity</p> <pre><code>public class MainActivity extends Activity { MediaPlayer music; int length; ImageView img; AnimationDrawable animation; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); } @Override public void onWindowFocusChanged(boolean hasFocus) { super.onWindowFocusChanged(hasFocus); music = MediaPlayer.create(getApplicationContext(), R.raw.mymusic); music.setLooping(true); music.start(); img = (ImageView) findViewById(R.id.imageView1); img.setBackgroundResource(R.drawable.myanim); animation = (AnimationDrawable) img.getDrawable(); animation.start(); } @Override protected void onPause() { super.onPause(); music.pause(); length = music.getCurrentPosition(); } @Override protected void onResume() { super.onResume(); music.seekTo(length); music.start(); } @Override public boolean onCreateOptionsMenu(Menu menu) { super.onCreateOptionsMenu(menu); getMenuInflater().inflate(R.menu.options, menu); return true; } @Override public boolean onOptionsItemSelected(MenuItem item) { switch (item.getItemId()) { case R.id.about: Intent ia = new Intent("spec.sartheris.myapp.ABOUTUS"); startActivity(ia); break; case R.id.exit: finish(); break; } return false; } } </code></pre>
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    1. USSartheris Stormhammer
    1. USSartheris Stormhammer
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    1. PO
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    1. This table or related slice is empty.
    1. COyour error is here check line num 47 in MainActivity.java : spec.sartheris.myapp.MainActivity.onResume(MainActivity.java:47)
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      1. POApp can't start on Android 2.3
      1. USDhawal Sodha Parmar
    2. COput you MainActivity code here...
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      1. POApp can't start on Android 2.3
      1. USDhawal Sodha Parmar
    3. COyou have a NullPointerException on line 47 in MainActivity.java. Kindly check that
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      1. POApp can't start on Android 2.3
      1. USSankar V
 

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