微信中长按弹出菜单(1) 没有实现功能

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MainActivity：

package com.example.menumeration;import android.app.Activity;import android.os.Bundle;import android.view.ContextMenu;import android.view.ContextMenu.ContextMenuInfo;import android.view.MenuItem;import android.view.View;import android.widget.TextView;import android.widget.Toast;public class MainActivity extends Activity {@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);TextView text=(TextView) findViewById(R.id.text);text.setOnCreateContextMenuListener(this);}@Overridepublic void onCreateContextMenu(ContextMenu menu, View v, ContextMenuInfo menuInfo) {menu.add(0, 1001, 0, "标为未读");menu.add(0, 1002, 1, "删除聊天");menu.add(0, 1003, 2, "设为置顶");super.onCreateContextMenu(menu, v, menuInfo);}@Overridepublic boolean onContextItemSelected(MenuItem item) {Toast.makeText(this,item.getTitle(), Toast.LENGTH_LONG).show();return super.onContextItemSelected(item);}}

acitivity:

只有一个普通的TextView。

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent"    tools:context="com.example.menumeration.MainActivity" >    <TextView        android:id="@+id/text"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="微信" /></RelativeLayout>

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