안드로이드 addToBackStack 애플 리케이션을 닫습니다

Question

내 애플 리케이션에서 다른 조각을 표시 활동과 함께 일하고 있어요. 또한 액티비티에는 drawerlayout이 있습니다.

activity_main.xml :

<android.support.v4.widget.DrawerLayout 
xmlns:android="http://schemas.android.com/apk/res/android" 
android:id="@+id/drawer_layout" 
android:layout_width="match_parent" 
android:layout_height="match_parent"> 

<!-- Framelayout to display Fragments --> 
<FrameLayout 
    android:id="@+id/frame_container" 
    android:layout_width="match_parent" 
    android:layout_height="match_parent" /> 

<!-- Listview to display slider menu --> 
<ListView 
    android:id="@+id/list_slidermenu" 
    android:layout_width="240dp" 
    android:layout_height="match_parent" 
    android:layout_gravity="start" 
    android:choiceMode="singleChoice" 
    android:divider="@color/list_divider" 
    android:dividerHeight="1dp" 
    android:listSelector="@drawable/list_selector" 
    android:background="@color/list_background"/> 
</android.support.v4.widget.DrawerLayout> 

그래서 지금은 그들을 대체하여 조각을 보여주기 위해 노력하고있어. 이것은 잘 작동합니다! 그러나 조각을 백 스택에 추가하고 싶습니다.

private void displayView(int position) { 
    // update the main content by replacing fragments 
    Fragment fragment = null; 
    switch (position) { 
     case 0: 
      fragment = new firstFragment(); 
      break; 
     case 1: 
      fragment = new secondFragment(); 
      break; 
     default: 
      break; 
    } 

    if (fragment != null) { 

     // Insert the fragment by replacing any existing fragment 
     FragmentManager fragmentManager = getFragmentManager(); 
     FragmentTransaction transaction = fragmentManager.beginTransaction(); 
     transaction.replace(R.id.frame_container, fragment); 
     transaction.addToBackStack(null); 
     transaction.commit(); 

     // update selected item and title, then close the drawer 
     mDrawerList.setItemChecked(position, true); 
     mDrawerList.setSelection(position); 
     setTitle(navMenuTitles[position]); 
     mDrawerLayout.closeDrawer(mDrawerList); 
    } else { 
     // error in creating fragment 
     Log.e("MainActivity", "Error in creating fragment"); 
    } 
} 

내 응용 프로그램이 잘 작동하지만 내가 두 번째 또는 세 번째 조각을 표시 한 후 내 휴대 전화의 뒤로 가기 (back) 버튼을 누를 때, 응용 프로그램은 종료 : 그래서 이렇게. 왜 addToBackStack (null)이 작동하지 않는지 모르겠다.

전체 로그 캣 : http://pastebin.com/8NPHgqXi

관련 부분 :

02-05 15:50:08.002 7844-7844/example.de.example D/ViewGroup﹕ addInArray been called, this = android.support.v7.widget.ActionMenuView{421451d8 V.E..... ......ID 540,0-540,84}call stack = 
java.lang.Throwable: addInArray 
     at android.view.ViewGroup.addInArray(ViewGroup.java:3786) 
     at android.view.ViewGroup.addViewInner(ViewGroup.java:3740) 
     at android.view.ViewGroup.addView(ViewGroup.java:3564) 
     at android.view.ViewGroup.addView(ViewGroup.java:3509) 
     at android.support.v7.internal.view.menu.BaseMenuPresenter.addItemView(BaseMenuPresenter.java:133) 
     at android.support.v7.internal.view.menu.BaseMenuPresenter.updateMenuView(BaseMenuPresenter.java:107) 
     at android.support.v7.widget.ActionMenuPresenter.updateMenuView(ActionMenuPresenter.java:207) 
     at android.support.v7.internal.view.menu.MenuBuilder.dispatchPresenterUpdate(MenuBuilder.java:279) 
     at android.support.v7.internal.view.menu.MenuBuilder.onItemsChanged(MenuBuilder.java:1021) 
     at android.support.v7.internal.view.menu.MenuBuilder.startDispatchingItemsChanged(MenuBuilder.java:1044) 
     at android.support.v7.app.ActionBarActivityDelegateBase.preparePanel(ActionBarActivityDelegateBase.java:1021) 
     at android.support.v7.app.ActionBarActivityDelegateBase.doInvalidatePanelMenu(ActionBarActivityDelegateBase.java:1182) 
     at android.support.v7.app.ActionBarActivityDelegateBase.access$100(ActionBarActivityDelegateBase.java:79) 
     at android.support.v7.app.ActionBarActivityDelegateBase$1.run(ActionBarActivityDelegateBase.java:115) 
     at android.view.Choreographer$CallbackRecord.run(Choreographer.java:788) 
     at android.view.Choreographer.doCallbacks(Choreographer.java:591) 
     at android.view.Choreographer.doFrame(Choreographer.java:559) 
     at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:774) 
     at android.os.Handler.handleCallback(Handler.java:808) 
     at android.os.Handler.dispatchMessage(Handler.java:103) 
     at android.os.Looper.loop(Looper.java:193) 
     at android.app.ActivityThread.main(ActivityThread.java:5292) 
     at java.lang.reflect.Method.invokeNative(Native Method) 
     at java.lang.reflect.Method.invoke(Method.java:515) 
     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:824) 
     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:640) 
     at dalvik.system.NativeStart.main(Native Method) 

Answer 1

먼저 백 스택을 취소해야!

if (fragment != null) { 
      FragmentManager fm = getSupportFragmentManager(); 

      //clear the back stack when click happens 
      while (fm.getBackStackEntryCount() > 1) { 
       fm.popBackStackImmediate(); 
      } 

      FragmentTransaction ft = fm.beginTransaction(); 
      ft.addToBackStack(null); 
      ft.replace(R.id.frame_container, fragment).commit(); 

      mDrawerList.setItemChecked(position, true); 
      mDrawerList.setSelection(position); 


    enter code here 

Answer 2

대신 널 (null)의

transaction.addToBackStack("saveState"); 

어떤 문자열 값을 시도하고 확인하십시오. 작동하지 않으면 전체 LogCat을 붙여 넣으십시오.

수정 : 귀하의 최신 LogCat 업데이트에 따라 을 Context으로 전달했다고 생각합니다. 'this'대신 getActivity()을 전달해야합니다. context