【Android】PopupMenu的使用

效果图：







使用PopupMenu可以很方便地在某个控件下方显示简单的菜单，并实现菜单项的点击响应。

（1）在res/menu目录下生成一个menu的xml文件，如此处的pop_menu.xml:

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

<item
android:id="@+id/pop_menu_item_share"
android:title="@string/pop_menu_share"
/>

<item
android:id="@+id/pop_menu_item_setting"
android:title="@string/pop_menu_setting"
/>

</menu>

（2）主页面布局，这里只有一个TextView，activity_main.xml:

<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"
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.ydz.test026_popupmenu.MainActivity" >

<TextView
android:id="@+id/textview_pop_menu"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@android:color/holo_green_dark"
android:text="@string/text_pop"
android:textSize="30sp" />

</RelativeLayout>

（3）Activity中的逻辑处理:

package com.ydz.test026_popupmenu;

import android.app.Activity;
import android.os.Bundle;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.PopupMenu;
import android.widget.PopupMenu.OnMenuItemClickListener;
import android.widget.TextView;
import android.widget.Toast;

public class MainActivity extends Activity {

private TextView mTextviewPopMenu;

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

mTextviewPopMenu = (TextView) findViewById(R.id.textview_pop_menu);
mTextviewPopMenu.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// 创建PopupMenu，其中第二个参数为要关联显示的控件
PopupMenu tPopupMenu = new PopupMenu(MainActivity.this, mTextviewPopMenu);
// 装载视图，Menu在构造函数中已经生成，此处getMenu直接用即可
tPopupMenu.getMenuInflater().inflate(R.menu.pop_menu, tPopupMenu.getMenu());
// 设置item的点击监听
tPopupMenu.setOnMenuItemClickListener(new OnMenuItemClickListener() {
@Override
public boolean onMenuItemClick(MenuItem item) {
switch (item.getItemId()) {
case R.id.pop_menu_item_share:
Toast.makeText(getApplicationContext(), "Click Share",
Toast.LENGTH_SHORT).show();
break;
case R.id.pop_menu_item_setting:
Toast.makeText(getApplicationContext(), "Click Setting",
Toast.LENGTH_SHORT).show();
break;
default:
break;
}
return true;
}
});
// 显示
tPopupMenu.show();
}
});
}
}

如果某个menu选项只是用于显示而不用响应事件处理的话，可以对该item设置enable属性，如：

<item
android:id="@+id/pop_menu_item_setting"
android:title="@string/pop_menu_setting"
android:enabled="false"
/>