Android中onContextItemSelected不响应是怎么回事？

在实现一个Contextual Menu时，onCreateContextMenu()是成功执行了的，但长按显示出上下文菜单时，点击其中一个item，onContextItemSelected()中的内容并没有被执行，请问这是为什么？

public class MainActivity extends ActionBarActivity {

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    TextView tv = (TextView)findViewById(R.id.hint);
    tv.setText("this is a textview");
    registerForContextMenu(tv);

}

public boolean onContexItemSelected(MenuItem item){
      super.onContextItemSelected(item);
      Log.d("ContextMenu", item.getTitle()+" is selected!");
      Toast.makeText(this, "Hleele;", Toast.LENGTH_LONG).show();
      return false;

  }


  public void onCreateContextMenu(ContextMenu menu, View v,
            ContextMenuInfo menuInfo) {
      super.onCreateContextMenu(menu, v, menuInfo);
        MenuItem cmitem1 = menu.add(0, Menu.FIRST, Menu.NONE, "item1");
        MenuItem cmitem2 = menu.add(0, Menu.FIRST+1, Menu.NONE, "item2");
        MenuItem cmitem3 = menu.add(0, Menu.FIRST+2, Menu.NONE, "item3");
        /*cmitem1.setCheckable(true)
        .setChecked(true);
        cmitem2.setCheckable(true);
        cmitem3.setCheckable(true);*/

    }

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


@Override
public boolean onOptionsItemSelected(MenuItem item) {
    // Handle action bar item clicks here. The action bar will
    // automatically handle clicks on the Home/Up button, so long
    // as you specify a parent activity in AndroidManifest.xml.
    int id = item.getItemId();
    if (id == R.id.action_settings) {
        return true;
    }
    return super.onOptionsItemSelected(item);
}

}

你的onContexItemSelected、onCreateContextMenu需要继承activity的，onContexItemSelected方法中的super要去掉，返回true就ok了。我的代码是：

@Override
public void onCreateContextMenu(ContextMenu menu, View v,
        ContextMenuInfo menuInfo) {
    super.onCreateContextMenu(menu, v, menuInfo);
    menu.add(0, Menu.FIRST, Menu.NONE, "item1");
    menu.add(0, Menu.FIRST + 1, Menu.NONE, "item2");
    menu.add(0, Menu.FIRST + 2, Menu.NONE, "item3");

}

@Override
public boolean onContextItemSelected(MenuItem item) {
    Log.d("ContextMenu", item.getTitle() + " is selected!");
    Toast.makeText(this, "Hleele;", Toast.LENGTH_LONG).show();
    return true;
}