【Android】弹出菜单popupmenu

弹出菜单popupmenu就是点击某个组件时弹出的菜单。

Activity类：

package com.zzj.ui.popupmenudemo;

import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.widget.PopupMenu;
import android.widget.PopupMenu.OnMenuItemClickListener;
import android.widget.Toast;

import com.zzj.ui.R;

public class PopupMenuActivity extends Activity {
	PopupMenu popupMenu;
	Menu menu;

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);

		setContentView(R.layout.popupmenu_activity);

		popupMenu = new PopupMenu(this, findViewById(R.id.popupmenu_btn));
		menu = popupMenu.getMenu();

		// 通过代码添加菜单项
		menu.add(Menu.NONE, Menu.FIRST + 0, 0, "复制");
		menu.add(Menu.NONE, Menu.FIRST + 1, 1, "粘贴");

		// 通过XML文件添加菜单项
		MenuInflater menuInflater = getMenuInflater();
		menuInflater.inflate(R.menu.popupmenu, menu);

		// 监听事件
		popupMenu.setOnMenuItemClickListener(new OnMenuItemClickListener() {

			@Override
			public boolean onMenuItemClick(MenuItem item) {
				switch (item.getItemId()) {
				case R.id.news:
					Toast.makeText(PopupMenuActivity.this, "新建",
							Toast.LENGTH_LONG).show();
					break;
				case R.id.open:
					Toast.makeText(PopupMenuActivity.this, "打开",
							Toast.LENGTH_LONG).show();
					break;
				case Menu.FIRST + 0:
					Toast.makeText(PopupMenuActivity.this, "复制",
							Toast.LENGTH_LONG).show();
					break;
				case Menu.FIRST + 1:
					Toast.makeText(PopupMenuActivity.this, "粘贴",
							Toast.LENGTH_LONG).show();
					break;
				default:
					break;
				}
				return false;
			}
		});
	}

	public void popupmenu(View v) {
		popupMenu.show();
	}
}

Activity布局文件：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" >

    <Button
        android:id="@+id/popupmenu_btn"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:onClick="popupmenu"
        android:text="弹出菜单" />

</LinearLayout>

popupmenu布局文件：

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

    <item
        android:id="@+id/news"
        android:title="新建"/>
    <item
        android:id="@+id/open"
        android:title="打开"/>

</menu>

效果：