上下文菜單不出現

看看下面的代碼...爲什麼我的上下文菜單正在創建？這可能是什麼原因...？上下文菜單不出現

@Override 
public void onCreateContextMenu(ContextMenu menu, View v, 
     ContextMenuInfo menuInfo) { 
    super.onCreateContextMenu(menu, v, menuInfo); 

    MenuInflater inflator = getMenuInflater(); 

    inflator.inflate(R.menu.contextmenudisplayer, menu); 
} 

@Override 
public boolean onContextItemSelected(MenuItem item) { 
    switch(item.getItemId()) 
    { 
    case R.id.delete: 
     AdapterContextMenuInfo info = (AdapterContextMenuInfo) item.getMenuInfo(); 

      String s = (String) ((Cursor) getListView().getItemAtPosition(info.position)) 
        .getString(2); 
      Log.v("ID is", s); 

    default: 

    return super.onContextItemSelected(item); 
    } 
}

，這裏是xml文件，從上下文菜單中顯示器的代碼 contextmenudisplayer.xml

<?xml version="1.0" encoding="utf-8"?> 
<menu xmlns:android="http://schemas.android.com/apk/res/android" > 

    <item 
     android:id="@+id/delete" 
     android:title="Delete Message"> 
    </item> 
    <item 
     android:id="@+id/forward" 
     android:title="Forward"> 
    </item> 

</menu>

來源

2012-04-10 kashifmehmood

上下文菜單不出現

回答

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