Android PopupWindow使用

//代码

package com.mark.pop.win;

import android.app.Activity;
import android.os.Bundle;
import android.view.Gravity;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.PopupWindow;
import android.widget.RelativeLayout;

public class PopupWindowDemoActivity extends Activity
{
	private Button pop_windowButton;
	private PopupWindow menuPop=null;
	@Override
	public void onCreate(Bundle savedInstanceState)
	{
		super.onCreate(savedInstanceState);
		setContentView(R.layout.main);
		
		pop_windowButton=(Button) findViewById(R.id.pop_window);
		pop_windowButton.setOnClickListener(new OnClickListener()
		{
			@Override
			public void onClick(View v)
			{
				View paopaoView = getLayoutInflater().inflate(R.layout.pop_menu, null);
				//这里最关键，不在pop的View的里面找到相映的ID，还真不好关闭popWin
				Button pop_play_btn=(Button) paopaoView.findViewById(R.id.play_btn);
				
				menuPop = new PopupWindow(paopaoView, RelativeLayout.LayoutParams.WRAP_CONTENT, RelativeLayout.LayoutParams.WRAP_CONTENT);
				menuPop.showAtLocation(pop_windowButton, Gravity.LEFT,0,-120);
				pop_play_btn.setOnClickListener(new OnClickListener()
				{
					@Override
					public void onClick(View v)
					{
						closePop();
					}
				});
			}
		});
	}
	@Override
	public boolean onTouchEvent(MotionEvent event)
	{
		closePop();
		return super.onTouchEvent(event);
	}
	private void closePop()
	{
		if(null!=menuPop)
		{
			menuPop.dismiss();
		}
	}
}

//pop_menu.xml

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

    <Button
        android:id="@+id/play_btn"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:background="@drawable/button_menu_pause" /><!--这个依旧是布局-->

    <Button
        android:id="@+id/sound_btn"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:background="@drawable/button_menu_sound" /><!--布局-->

    <Button
        android:id="@+id/help_btn"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:background="@drawable/button_menu_help" /><!--布局-->
    <Button
        android:id="@+id/about_btn"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:background="@drawable/button_menu_about" /><!--布局-->
    <Button
        android:id="@+id/home_btn"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:background="@drawable/button_menu_home" /><!--布局-->
</LinearLayout>

//button_menu_pause.xml

<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item         
	android:state_pressed="false"
	android:drawable="@drawable/pause_menu_1" /><!--未按下时-->
	<item         
	android:state_pressed="true"
	android:drawable="@drawable/pause_menu_2" /><!--已按下时-->
	<item         
	android:state_focused="true"
	android:drawable="@drawable/pause_menu_2" /><!--已点击时-->
	<item         
	android:drawable="@drawable/pause_menu_1" /><!--这个就是图片了 default-->
</selector>

//button_menu_sound.xml

同上

//button_menu_help.xml

同上

//button_menu_about.xml

同上