Android popu菜单

来源：互联网发布：软件测试有哪些工具编辑：程序博客网时间：2024/05/06 12:45

popu 菜单构建与contextMenu 菜单以及 optionsMenu 菜单略微不同

使用步骤为
① 创建popu 对象
② 设置监听
③ 调用popu的show() 方法

package com.example.gp11_day12_popupmenu;

import android.os.Bundle;
import android.annotation.SuppressLint;
import android.app.Activity;
import android.graphics.Color;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.PopupMenu;
import android.widget.PopupMenu.OnMenuItemClickListener;
import android.widget.TextView;

public class MainActivity extends Activity {

private TextView textView;private float fontSize = 20f;@Overrideprotected void onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    setContentView(R.layout.activity_main);    textView = (TextView) findViewById(R.id.textView);    textView.setTextSize(fontSize);}//当点击按钮时显示弹出菜单@SuppressLint("NewApi")public void showMenu(View v){    //创建弹出菜单    //第二个参数接收的是一个视图对象，作用是指定弹出菜单显示的参考位置    PopupMenu pop = new PopupMenu(this, v);    //生成菜单项对象并加入到弹出菜单中    getMenuInflater().inflate(R.menu.main, pop.getMenu());    //给菜单添加事件监听    pop.setOnMenuItemClickListener(new OnMenuItemClickListener() {        @Override        public boolean onMenuItemClick(MenuItem item) {            int id = item.getItemId();            switch(id)            {            case R.id.action_bigFont:                fontSize +=5;                textView.setTextSize(fontSize);                break;            case R.id.action_smallFont:                fontSize -=5;                textView.setTextSize(fontSize);                break;            case R.id.action_bgColor:                int red = (int)(Math.random()*256);                int green = (int)(Math.random()*256);                int blue = (int)(Math.random()*256);                textView.setBackgroundColor(Color.rgb(red, green, blue));                break;            }            return false;        }    });    //显示弹出菜单    pop.show();}

}

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