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POAndroid Pager Issue on Pause
 

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  1. POAndroid Pager Issue on Pause
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    <p>I'm building an application using Pager with the compatibility library. My application forceClose whenever I try to pause it (when I come back to my desktop for instance).</p> <p>I have never encountered any error of that type and therefore, I've no idea how to solve it.</p> <p>I'll show you my code whereas i'm quite sure you'll don't have to look at it : </p> <pre><code>public class *** extends FragmentActivity { /** Called when the activity is first created. */ static final int NUM_ITEMS = 5; static final int NUM_ACTUALITE = 0; static final int NUM_SELECTION = 1; static final int NUM_MULTIMEDIA = 2; static final int NUM_FESTIVALIER = 3; static final int NUM_***E = 4; MyAdapter mAdapter; ViewPager mPager; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.pager_layout); mAdapter = new MyAdapter(getSupportFragmentManager()); mPager = (ViewPager) findViewById(R.id.pager); mPager.setAdapter(mAdapter); } public static class MyAdapter extends FragmentPagerAdapter { public MyAdapter(FragmentManager fm) { super(fm); } @Override public int getCount() { return NUM_ITEMS; } @Override public Fragment getItem(int position) { switch (position) { case NUM_ACTUALITE: return ActuFragment.newInstance(); case NUM_SELECTION: return SelectionFragment.newInstance(); case NUM_MULTIMEDIA: return MultimediaFragment.newInstance(); case NUM_FESTIVALIER: return FestivalierFragment.newInstance(); case NUM_***E: return ***eFragment.newInstance(); default: return ActuFragment.newInstance(); } } } </code></pre> <p>and my logCat : </p> <pre><code>02-15 11:48:03.902: E/AndroidRuntime(11601): FATAL EXCEPTION: main 02-15 11:48:03.902: E/AndroidRuntime(11601): java.lang.RuntimeException: Unable to pause activity {com.**.**/com.**.**.***Activity}: java.lang.NullPointerException 02-15 11:48:03.902: E/AndroidRuntime(11601): at android.app.ActivityThread.performPauseActivity(ActivityThread.java:2354) 02-15 11:48:03.902: E/AndroidRuntime(11601): at android.app.ActivityThread.performPauseActivity(ActivityThread.java:2311) 02-15 11:48:03.902: E/AndroidRuntime(11601): at android.app.ActivityThread.handlePauseActivity(ActivityThread.java:2291) 02-15 11:48:03.902: E/AndroidRuntime(11601): at android.app.ActivityThread.access$1700(ActivityThread.java:117) 02-15 11:48:03.902: E/AndroidRuntime(11601): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:938) 02-15 11:48:03.902: E/AndroidRuntime(11601): at android.os.Handler.dispatchMessage(Handler.java:99) 02-15 11:48:03.902: E/AndroidRuntime(11601): at android.os.Looper.loop(Looper.java:130) 02-15 11:48:03.902: E/AndroidRuntime(11601): at android.app.ActivityThread.main(ActivityThread.java:3683) 02-15 11:48:03.902: E/AndroidRuntime(11601): at java.lang.reflect.Method.invokeNative(Native Method) 02-15 11:48:03.902: E/AndroidRuntime(11601): at java.lang.reflect.Method.invoke(Method.java:507) 02-15 11:48:03.902: E/AndroidRuntime(11601): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839) 02-15 11:48:03.902: E/AndroidRuntime(11601): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597) 02-15 11:48:03.902: E/AndroidRuntime(11601): at dalvik.system.NativeStart.main(Native Method) 02-15 11:48:03.902: E/AndroidRuntime(11601): Caused by: java.lang.NullPointerException 02-15 11:48:03.902: E/AndroidRuntime(11601): at android.support.v4.app.FragmentManagerImpl.saveFragmentBasicState(FragmentManager.java:1576) 02-15 11:48:03.902: E/AndroidRuntime(11601): at android.support.v4.app.FragmentManagerImpl.saveAllState(FragmentManager.java:1617) 02-15 11:48:03.902: E/AndroidRuntime(11601): at android.support.v4.app.FragmentActivity.onSaveInstanceState(FragmentActivity.java:481) 02-15 11:48:03.902: E/AndroidRuntime(11601): at android.app.Activity.performSaveInstanceState(Activity.java:1037) 02-15 11:48:03.902: E/AndroidRuntime(11601): at android.app.Instrumentation.callActivityOnSaveInstanceState(Instrumentation.java:1181) 02-15 11:48:03.902: E/AndroidRuntime(11601): at android.app.ActivityThread.performPauseActivity(ActivityThread.java:2336) 02-15 11:48:03.902: E/AndroidRuntime(11601): ... 12 more </code></pre> <p>A fragment of mines : </p> <pre><code>public class ActuFragment extends Fragment { public static ActuFragment newInstance() { ActuFragment f = new ActuFragment(); return f; } @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View mainView = inflater.inflate(R.layout.actualites_layout, container, false); return mainView; } } </code></pre>
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    1. USRenaud Favier
    1. USRenaud Favier
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    1. COmust be something wrong with how you're using fragments. have you tried doing it without fragments just yet?
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      1. USjosephus
    2. COyes, and it seemed to work just fine. do you wan't to see others part of my code ?
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      1. USRenaud Favier
    3. COI've miss read your answer, no I haven't tried it without fragments, actualy I was sure it wasn't possible. but I need them anyway. i've added one of my fragments, they are all lookalike
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      1. POAndroid Pager Issue on Pause
      1. USRenaud Favier
 

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