Android ActionBar Sharing с совместимостью с версией

Question

Я пытаюсь поделиться через Android ShareActionProvider.

Мой код

<menu xmlns:android="http://schemas.android.com/apk/res/android" 
xmlns:app="http://schemas.android.com/apk/res-auto" 
xmlns:tools="http://schemas.android.com/tools" 
tools:context="com.example.shreegorji.MyActionBarActivity" > 

<!-- android:onClick="onGroupItemClick" 

--> 
<item android:id="@+id/action_share" 
     android:icon="@drawable/ic_action_share" 
     android:title="@string/action_share" 
     app:actionProviderClass="android.support.v7.widget.ShareActionProvider" 
     app:showAsAction="ifRoom" 
    /> 

и вот мой код Java класс

@Override 
public boolean onCreateOptionsMenu(Menu menu) { 
    // Inflate the menu; this adds items to the action bar if it is present. 
    getMenuInflater().inflate(R.menu.my_action_bar, menu); 

    this.menu=menu; 

    //set icon 
    menu.findItem(R.id.submenu_item1).setIcon(null); 
    menu.findItem(R.id.submenu_item2).setIcon(null); 
    menu.findItem(R.id.submenu_item3).setIcon(null); 

    if(setDefault.getInt("Language", 3)==1) menu.findItem(R.id.submenu_item1).setIcon(R.drawable.ic_action_accept); 
    else if(setDefault.getInt("Language", 3)==2) menu.findItem(R.id.submenu_item2).setIcon(R.drawable.ic_action_accept); 
    else menu.findItem(R.id.submenu_item3).setIcon(R.drawable.ic_action_accept); 

    // Set up ShareActionProvider's default share intent 
    MenuItem shareItem = menu.findItem(R.id.action_share); 
    ShareActionProvider mShareActionProvider = (ShareActionProvider) 
      MenuItemCompat.getActionProvider(shareItem); 
    mShareActionProvider.setShareIntent(getDefaultIntent()); 

    return super.onCreateOptionsMenu(menu); 
} 

private Intent getDefaultIntent() { 
    // TODO Auto-generated method stub 
    Intent intent = new Intent(Intent.ACTION_SEND); 
    intent.setType("text/plain"); 
    String msg = "Gurudev Says: "+shareText; 
    Log.e("msg",msg); 
    intent.putExtra(Intent.EXTRA_TEXT,msg); 

    return intent; 
} 

Но это бросает NullPointerException, когда я пытаюсь поделиться через мое приложение. И этот код также не работает с уровнем API < 11.

Когда я пытаюсь запустить этот код под уровнем API 11, он выдает исключение. Пожалуйста, направляйте меня.

Моих исключений

03-15 22:16:20.527: E/AndroidRuntime(472): FATAL EXCEPTION: main 
03-15 22:16:20.527: E/AndroidRuntime(472): java.lang.NullPointerException 
03-15 22:16:20.527: E/AndroidRuntime(472): at  android.support.v7.internal.widget.ActivityChooserView.updateAppearance(ActivityChooserView.java:512) 
03-15 22:16:20.527: E/AndroidRuntime(472): at android.support.v7.internal.widget.ActivityChooserView.access$400(ActivityChooserView.java:68) 
03-15 22:16:20.527: E/AndroidRuntime(472): at android.support.v7.internal.widget.ActivityChooserView$3.onChanged(ActivityChooserView.java:249) 
03-15 22:16:20.527: E/AndroidRuntime(472): at android.database.DataSetObservable.notifyChanged(DataSetObservable.java:31) 
03-15 22:16:20.527: E/AndroidRuntime(472): at android.widget.BaseAdapter.notifyDataSetChanged(BaseAdapter.java:50) 
03-15 22:16:20.527: E/AndroidRuntime(472): at android.support.v7.internal.widget.ActivityChooserView$1.onChanged(ActivityChooserView.java:129) 
03-15 22:16:20.527: E/AndroidRuntime(472): at android.database.DataSetObservable.notifyChanged(DataSetObservable.java:31) 
03-15 22:16:20.527: E/AndroidRuntime(472): at android.support.v7.internal.widget.ActivityChooserModel.ensureConsistentState(ActivityChooserModel.java:663) 
03-15 22:16:20.527: E/AndroidRuntime(472): at android.support.v7.internal.widget.ActivityChooserModel.setIntent(ActivityChooserModel.java:376) 
03-15 22:16:20.527: E/AndroidRuntime(472): at android.support.v7.widget.ShareActionProvider.setShareIntent(ShareActionProvider.java:304) 
03-15 22:16:20.527: E/AndroidRuntime(472): at com.example.shreegorji.ThoughtsContainerActivity.onCreateOptionsMenu(ThoughtsContainerActivity.java:94) 
03-15 22:16:20.527: E/AndroidRuntime(472): at android.app.Activity.onCreatePanelMenu(Activity.java:2148) 
03-15 22:16:20.527: E/AndroidRuntime(472): at android.support.v4.app.FragmentActivity.onCreatePanelMenu(FragmentActivity.java:275) 
03-15 22:16:20.527: E/AndroidRuntime(472): at android.support.v7.app.ActionBarActivity.superOnCreatePanelMenu(ActionBarActivity.java:276) 
03-15 22:16:20.527: E/AndroidRuntime(472): at android.support.v7.app.ActionBarActivityDelegate$1.onCreatePanelMenu(ActionBarActivityDelegate.java:79) 
03-15 22:16:20.527: E/AndroidRuntime(472): at android.support.v7.app.ActionBarActivityDelegateBase.preparePanel(ActionBarActivityDelegateBase.java:979) 
03-15 22:16:20.527: E/AndroidRuntime(472): at android.support.v7.app.ActionBarActivityDelegateBase.doInvalidatePanelMenu(ActionBarActivityDelegateBase.java:1182) 
03-15 22:16:20.527: E/AndroidRuntime(472): at android.support.v7.app.ActionBarActivityDelegateBase.access$100(ActionBarActivityDelegateBase.java:79) 
03-15 22:16:20.527: E/AndroidRuntime(472): at android.support.v7.app.ActionBarActivityDelegateBase$1.run(ActionBarActivityDelegateBase.java:118) 
03-15 22:16:20.527: E/AndroidRuntime(472): at android.os.Handler.handleCallback(Handler.java:587) 
03-15 22:16:20.527: E/AndroidRuntime(472): at android.os.Handler.dispatchMessage(Handler.java:92) 
03-15 22:16:20.527: E/AndroidRuntime(472): at android.os.Looper.loop(Looper.java:123) 
03-15 22:16:20.527: E/AndroidRuntime(472): at android.app.ActivityThread.main(ActivityThread.java:4627) 
03-15 22:16:20.527: E/AndroidRuntime(472): at java.lang.reflect.Method.invokeNative(Native Method) 
03-15 22:16:20.527: E/AndroidRuntime(472): at java.lang.reflect.Method.invoke(Method.java:521) 
03-15 22:16:20.527: E/AndroidRuntime(472): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868) 
03-15 22:16:20.527: E/AndroidRuntime(472):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626) 
03-15 22:16:20.527: E/AndroidRuntime(472):  at dalvik.system.NativeStart.main(Native Method) 
03-15 22:45:19.917: E/Null(502): java.lang.NullPointerException 
03-15 22:45:20.417: E/msg(502): Gurudev Says: 
03-15 22:45:20.507: E/AndroidRuntime(502): FATAL EXCEPTION: main 
03-15 22:45:20.507: E/AndroidRuntime(502): java.lang.NullPointerExceptio 

Answer 1

Довольно трудно сказать, так как вы только выложили метод, но я собираюсь быть для этого: why MenuItemCompat.getActionProvider returns null?