Tabgroupactivity的OnBackpress不起作用iff键盘ID在任何活动中打开

Z时代
2024-01-10
分类：问答

我在我的应用程序中使用Tabgroupactivity如果我在我的应用程序中使用编辑框。当我单击编辑框键盘打开。在这个tym，如果按回来按钮我的应用程序去两个背部。以下是我对tabgroupactivity的代码。Tabgroupactivity的OnBackpress不起作用iff键盘ID在任何活动中打开

public class TabGroupActivity extends ActivityGroup { 
private ArrayList<String> mIdList; 
@Override 
public void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState);  
    if (mIdList == null) mIdList = new ArrayList<String>(); 
} 
/** 
* This is called when a child activity of this one calls its finish method. 
* This implementation calls {@link LocalActivityManager#destroyActivity} on the child activity 
* and starts the previous activity. 
* If the last child activity just called finish(),this activity (the parent), 
* calls finish to finish the entire group. 
*/ 
// public void finishFromChild(Activity child) { 
// 
//  LocalActivityManager manager = getLocalActivityManager(); 
//  int index = mIdList.size()-1; 
//  
//  if (index < 1) { 
//   finish(); 
//   return; 
//  } 
//   
//  manager.destroyActivity(mIdList.get(index), true); 
//  mIdList.remove(index); index--; 
//  String lastId = mIdList.get(index); 
//  Intent lastIntent = manager.getActivity(lastId).getIntent(); 
//  Window newWindow = manager.startActivity(lastId, lastIntent); 
//  setContentView(newWindow.getDecorView()); 
// } 
@Override 
public void finishFromChild(Activity child) 
{ 
    LocalActivityManager manager = getLocalActivityManager(); 
    int index = mIdList.size()-1; 
    if (index < 1) 
    { 
     finish(); 
     return; 
    } 
    destroy(mIdList.get(index), manager); 
    mIdList.remove(index); 
    index--; 
    String lastId = mIdList.get(index); 
    Intent lastIntent = manager.getActivity(lastId).getIntent(); 
    Window newWindow = manager.startActivity(lastId, lastIntent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP)); 
    //Window newWindow = manager.startActivity(lastId, lastIntent); 
    setContentView(newWindow.getDecorView()); 
} 
public boolean destroy(String id , LocalActivityManager manager) { 
    if(manager != null){ 
     manager.destroyActivity(id, false); 
     try { 
      final Field mActivitiesField = LocalActivityManager.class.getDeclaredField("mActivities"); 
      if(mActivitiesField != null){ 
       mActivitiesField.setAccessible(true); 
       @SuppressWarnings("unchecked") 
       final Map<String, Object> mActivities = (Map<String, Object>)mActivitiesField.get(manager); 
       if(mActivities != null){ 
        mActivities.remove(id); 
       } 
       final Field mActivityArrayField = LocalActivityManager.class.getDeclaredField("mActivityArray"); 
       if(mActivityArrayField != null){ 
        mActivityArrayField.setAccessible(true); 
        @SuppressWarnings("unchecked") 
        final ArrayList<Object> mActivityArray = (ArrayList<Object>)mActivityArrayField.get(manager); 
        if(mActivityArray != null){ 
         for(Object record : mActivityArray){ 
          final Field idField = record.getClass().getDeclaredField("id"); 
          if(idField != null){ 
           idField.setAccessible(true); 
           final String _id = (String)idField.get(record); 
           if(id.equals(_id)){ 
            mActivityArray.remove(record); 
            break; 
           } 
          } 
         } 
        } 
       } 
      } 
     } catch (Exception e) { 
      e.printStackTrace(); 
     } 
     return true; 
    } 
    return false; 
} 
/** 
* Starts an Activity as a child Activity to this. 
* @param Id Unique identifier of the activity to be started. 
* @param intent The Intent describing the activity to be started. 
* @throws android.content.ActivityNotFoundException. 
*/ 
public void startChildActivity(String Id, Intent intent) { 
    Window window; 
    window = getLocalActivityManager().startActivity(Id,intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP)); 
    if (window != null) { 
     mIdList.add(Id); 
     setContentView(window.getDecorView()); 
    } 
} 
/** 
* The primary purpose is to prevent systems before android.os.Build.VERSION_CODES.ECLAIR 
* from calling their default KeyEvent.KEYCODE_BACK during onKeyDown. 
*/ 
@Override 
public boolean onKeyDown(int keyCode, KeyEvent event) { 
    if (keyCode == KeyEvent.KEYCODE_BACK) { 
     //preventing default implementation previous to android.os.Build.VERSION_CODES.ECLAIR 
     return true; 
    } 
    return super.onKeyDown(keyCode, event); 
} 
/** 
* Overrides the default implementation for KeyEvent.KEYCODE_BACK 
* so that all systems call onBackPressed(). 
*/ 
@Override 
public boolean onKeyUp(int keyCode, KeyEvent event) { 
    if (keyCode == KeyEvent.KEYCODE_BACK) { 
     onBackPressed(); 
     return true; 
    } 
    return super.onKeyUp(keyCode, event); 
} 
/** 
* If a Child Activity handles KeyEvent.KEYCODE_BACK. 
* Simply override and add this method. 
*/ 
@Override 
public void onBackPressed () { 
    int length = mIdList.size(); 
    if (length > 1) { 
     Activity current = getLocalActivityManager().getActivity(mIdList.get(length-1)); 
     current.finish(); 
    }else{ 
     finish(); 
    } 
} 
}

回答：

尝试增加键收听到您的EditText这样，

eidtText.setOnKeyListener(new OnKeyListener() { 
     public boolean onKey(View arg0, int arg1, KeyEvent arg2) { 
      if(arg2=KeyEvent.KEYCODE_BACK) 
      { 
       //handle back event here 
        onBackPressed(); 
       return true; 
      } 
      else 
      { 
       return false; 
      } 
     } 
    });