package com.hanqi.testapp2;import android.app.Activity;
import android.os.Bundle;
import android.view.ContextMenu;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.SubMenu;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;public class TestActivity3 extends Activity {Button bt_1;Button bt_2;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_test3);bt_1=(Button)findViewById(R.id.bt_1);bt_2=(Button)findViewById(R.id.bt_2);//给组件添加上下菜单 Activity是OnCreateContextMenuListener的实现类
        bt_2.setOnCreateContextMenuListener(this);//添加长按监听器
//        bt_2.setOnLongClickListener(new View.OnLongClickListener() {
//            @Override
//            public boolean onLongClick(View v) {
//
//                Toast.makeText(TestActivity3.this, "按钮被长按了", Toast.LENGTH_SHORT).show();
//
//                return true;//后面不再处理
//            }
//        });//点击bt_1.setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View v) {Toast.makeText(TestActivity3.this, "按钮被点击了", Toast.LENGTH_SHORT).show();}});//长按bt_1.setOnLongClickListener(new View.OnLongClickListener() {@Overridepublic boolean onLongClick(View v) {Toast.makeText(TestActivity3.this, "按钮被长按了", Toast.LENGTH_SHORT).show();//事件是否已经被消费return true;}});}//重写创建上下文菜单的方法
@Overridepublic void onCreateContextMenu(ContextMenu menu, View v, ContextMenu.ContextMenuInfo menuInfo) {super.onCreateContextMenu(menu, v, menuInfo);//javamenu.add(1,0,1,"字体大小");menu.add(1, 1, 2, "背景颜色");SubMenu sm=menu.addSubMenu(1, 2, 3, "子菜单");sm.add(2,21,0,"子菜单1");sm.add(2,22,1,"子菜单2");//加载文件MenuInflater m=getMenuInflater();m.inflate(R.menu.test3_menu,menu);}@Overridepublic boolean onContextItemSelected(MenuItem item) {Toast.makeText(TestActivity3.this, "上下文菜单的标题title="+item.getTitle(), Toast.LENGTH_SHORT).show();return super.onContextItemSelected(item);}//给activity 添加选项菜单//重写
    @Overridepublic boolean onCreateOptionsMenu(Menu menu) {//添加菜单
//        menu.add(1,1,0,"添加");
//        menu.add(1,2,2,"修改");
//        menu.add(1,3,1,"删除");//加载菜单文件方式//1-获得菜单加载器MenuInflater m=getMenuInflater();//2-加载菜单文件 1)菜单文件 2)当前菜单
        m.inflate(R.menu.test3_menu,menu);return super.onCreateOptionsMenu(menu);}@Overridepublic boolean onOptionsItemSelected(MenuItem item) {Toast.makeText(TestActivity3.this, "菜单项的id="+item.getItemId()+"菜单项的title"+item.getTitle(), Toast.LENGTH_SHORT).show();//怎么判断菜单文件里的菜单哪个被选中了if(item.getItemId()==R.id.me_1){Toast.makeText(TestActivity3.this, "执行删除动作", Toast.LENGTH_SHORT).show();}else if (item.getItemId()==R.id.me_2){Toast.makeText(TestActivity3.this, "执行修改动作", Toast.LENGTH_SHORT).show();}return super.onOptionsItemSelected(item);}
}

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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"android:paddingBottom="@dimen/activity_vertical_margin"android:paddingLeft="@dimen/activity_horizontal_margin"android:paddingRight="@dimen/activity_horizontal_margin"android:paddingTop="@dimen/activity_vertical_margin"tools:context="com.hanqi.testapp2.TestActivity3"android:orientation="vertical"><Buttonandroid:layout_width="match_parent"android:layout_height="wrap_content"android:text="拨打电话"android:id="@+id/bt_1" /><Buttonandroid:layout_width="match_parent"android:layout_height="wrap_content"android:text="上下文菜单按钮"android:id="@+id/bt_2" /></LinearLayout>

<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android"><item android:id="@+id/me_1" android:title="删除"/><item android:id="@+id/me_2" android:title="修改"/>
</menu>