java.lang.IllegalStateException: L'activité a été détruite SlidingFragmentActivity

Question

Je suis nouveau sur Android et récemment j'utilise SlidingMenu (celui sur github) .Quand j'essaye de changer le fragment de MainActivity quand je clique sur le bouton sur le menu coulissant I obtenir l'erreur: "java.lang.IllegalStateException: l'activité a été détruite". Je pense que cela a quelque chose à voir avec les fragments mais ne peut pas comprendre comment faire face.

Voici le journal

06-07 02:37:58.533: E/AndroidRuntime(31909): java.lang.IllegalStateException: Activity has been destroyed 
06-07 02:37:58.533: E/AndroidRuntime(31909): at android.app.FragmentManagerImpl.enqueueAction(FragmentManager.java:1295) 
06-07 02:37:58.533: E/AndroidRuntime(31909): at android.app.BackStackRecord.commitInternal(BackStackRecord.java:548) 
06-07 02:37:58.533: E/AndroidRuntime(31909): at android.app.BackStackRecord.commit(BackStackRecord.java:532) 
06-07 02:37:58.533: E/AndroidRuntime(31909): at com.example.ui.MainActivity.switchContent(MainActivity.java:67) 
06-07 02:37:58.533: E/AndroidRuntime(31909): at com.example.ui.SlidingMenuFragment.switchFragment(SlidingMenuFragment.java:110) 
06-07 02:37:58.533: E/AndroidRuntime(31909): at com.example.ui.SlidingMenuFragment.onClick(SlidingMenuFragment.java:100) 
06-07 02:37:58.533: E/AndroidRuntime(31909): at android.view.View.performClick(View.java:4171) 
06-07 02:37:58.533: E/AndroidRuntime(31909): at android.view.View$PerformClick.run(View.java:17097) 
06-07 02:37:58.533: E/AndroidRuntime(31909): at android.os.Handler.handleCallback(Handler.java:615) 
06-07 02:37:58.533: E/AndroidRuntime(31909): at android.os.Handler.dispatchMessage(Handler.java:92) 
06-07 02:37:58.533: E/AndroidRuntime(31909): at android.os.Looper.loop(Looper.java:137) 
06-07 02:37:58.533: E/AndroidRuntime(31909): at android.app.ActivityThread.main(ActivityThread.java:4803) 
06-07 02:37:58.533: E/AndroidRuntime(31909): at java.lang.reflect.Method.invokeNative(Native Method) 
06-07 02:37:58.533: E/AndroidRuntime(31909): at java.lang.reflect.Method.invoke(Method.java:511) 
06-07 02:37:58.533: E/AndroidRuntime(31909): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793) 
06-07 02:37:58.533: E/AndroidRuntime(31909): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560) 
06-07 02:37:58.533: E/AndroidRuntime(31909): at dalvik.system.NativeStart.main(Native Method) 

Voici les codes MainActivity

public class MainActivity extends SlidingFragmentActivity implements 
    OnClickListener { 
public static SlidingMenu slidingMenu = null; 
private Fragment mContent; 

private long exitTime = 0; 

@Override 
public void onCreate(Bundle savedInstanceState) { 
    // TODO Auto-generated method stub 
    super.onCreate(savedInstanceState); 
    initFragment(); 
    setContentView(R.layout.activity_main); 

    MyApplication.getInstance().addActivity(MainActivity.this); 
} 

private void initFragment() { 
    mContent = new RidingActivityFragment(); 
    // ridingActivityFragment = new RidingActivityFragment(); 
    getFragmentManager().beginTransaction() 
      .add(R.id.content_frame, mContent).commit(); 
    setBehindContentView(R.layout.sliding_menu); 
    FragmentTransaction fragmentTransaction = getFragmentManager() 
      .beginTransaction(); 
    Fragment aa = new SlidingMenuFragment(); 
    fragmentTransaction.replace(R.id.content_left, aa); 
    fragmentTransaction.commit(); 

    slidingMenu = getSlidingMenu(); 
    slidingMenu.setMode(SlidingMenu.LEFT); 
    slidingMenu.setBehindOffsetRes(R.dimen.sliding_menu_offset); 
    slidingMenu.setTouchModeAbove(SlidingMenu.TOUCHMODE_FULLSCREEN); 
} 

@Override 
public void onClick(View v) { 
    // TODO Auto-generated method stub 
    switch (v.getId()) { 
    case R.id.title_bar_imageview: 
     slidingMenu.toggle(true); 
     break; 

    default: 
     break; 
    } 
} 

public void switchContent(Fragment fragment) { 
    mContent = fragment; 
    getFragmentManager().beginTransaction() 
      .replace(R.id.content_frame, fragment).commit(); 
    getSlidingMenu().showContent(); 
} 

et SlidingMenuFragment

public class SlidingMenuFragment extends Fragment implements OnClickListener { 
private View logoutView = null; 
private View sycnView = null; 
private View ridingView = null; 

private MySharedpreference mySharedpreference = null; 

@Override 
public void onCreate(Bundle savedInstanceState) { 
    // TODO Auto-generated method stub 
    super.onCreate(savedInstanceState); 
} 

@Override 
public View onCreateView(LayoutInflater inflater, ViewGroup container, 
     Bundle savedInstanceState) { 
    // TODO Auto-generated method stub 
    View view = inflater.inflate(R.layout.fragment_sliding_menu, container, 
      false); 

    logoutView = view.findViewById(R.id.toolbox_logout); 
    logoutView.setOnClickListener(this); 
    sycnView = view.findViewById(R.id.toolbox_sycn); 
    sycnView.setOnClickListener(this); 
    ridingView = view.findViewById(R.id.toolbox_riding); 
    ridingView.setSelected(true); 
    ridingView.setOnClickListener(this); 

    return view; 
} 

@Override 
public void onActivityCreated(Bundle savedInstanceState) { 
    // TODO Auto-generated method stub 
    super.onActivityCreated(savedInstanceState); 
} 

@Override 
public void onClick(View v) { 
    // TODO Auto-generated method stub 
    Fragment newContent = null; 
    switch (v.getId()) { 
    case R.id.toolbox_sycn: 
     newContent = new SycnActivityFragment(); 
     sycnView.setSelected(true); 
     ridingView.setSelected(false); 
     break; 

    case R.id.toolbox_riding: 
     newContent = new RidingActivityFragment(); 
     ridingView.setSelected(true); 
     sycnView.setSelected(false); 
     break; 

    default: 
     break; 
    } 

    if (newContent != null) { 
     switchFragment(newContent); 
    } 
} 

private void switchFragment(Fragment fragment) { 
    if (getActivity() == null) { 
     return; 
    } 

    MainActivity mainActivity = new MainActivity(); 
    mainActivity.switchContent(fragment); 
} 

Merci à l'avance!

Answer 1

Problème

Votre problème est ici: vous essayez de créer une autre instance que vous l'activité, dans votre fragment:

private void switchFragment(Fragment fragment) { 
if (getActivity() == null) { 
    return; 
} 

MainActivity mainActivity = new MainActivity(); 
    mainActivity.switchContent(fragment); 
} 

Solution

Au lieu de cela, vous devez getActivity à l'intérieur du fragment et écrire ce code dans SlidingMenuFragment:

private void switchFragment(Fragment fragment) { 
    if (getActivity() == null) { 
     return; 
    } 

    MainActivity mainActivity = (MainActivity)getActivity(); 
    mainActivity.switchContent(fragment); 
} 

Ce serait une bonne pratique si vous voulez utiliser les auditeurs de communiquer à votre activité de votre fragment