Android popupwindow弹出对话框

今天项目中要用到对话框浮层显示，PopupWindow可以实现该功能。可以自定义view，通过LayoutInflator方法加载自定义的布局。而且加载和退出时都可以自定义动画效果。还能指定显示的位置。效果图如下所示：

MainActivity代码：

package com.example.popwindow;

import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.View.OnTouchListener;
import android.widget.Button;
import android.widget.PopupWindow;
import android.widget.Toast;

/**
 * 
 * @author WangJintao
 * 
 * @date 2013-5-6
 */
public class MainActivity extends Activity implements OnClickListener {

	Button button, button1, button2, button3;
	PopupWindow popupWindow;

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		button = (Button) findViewById(R.id.button);
		button.setOnClickListener(this);

	}

	@Override
	public void onClick(View v) {
		switch (v.getId()) {
		case R.id.button:
			getPopWin();
			popupWindow.showAsDropDown(v);
			break;

		case R.id.button1:
			Toast.makeText(MainActivity.this, "button1", Toast.LENGTH_LONG)
					.show();
			popupWindow.dismiss();
			break;
		case R.id.button2:
			Toast.makeText(MainActivity.this, "button2", Toast.LENGTH_LONG)
					.show();
			popupWindow.dismiss();
			break;
		case R.id.button3:
			Toast.makeText(MainActivity.this, "button3", Toast.LENGTH_LONG)
					.show();
			popupWindow.dismiss();
			break;
		default:
			break;
		}
	}

	private void getPopWin() {
		if (popupWindow != null) {
			popupWindow.dismiss();
		} else {
			initPopWin();
		}
	}

	private void initPopWin() {
		View popupWindow_view = getLayoutInflater().inflate(R.layout.pop_win,
				null, false);
		popupWindow = new PopupWindow(popupWindow_view, 200, 300, true);
		popupWindow.setAnimationStyle(R.style.AnimationFade);
		popupWindow_view.setOnTouchListener(new OnTouchListener() {

			@Override
			public boolean onTouch(View v, MotionEvent event) {
				if (popupWindow != null && popupWindow.isShowing()) {
					popupWindow.dismiss();
					popupWindow = null;
				}
				return false;
			}
		});
		button1 = (Button) popupWindow_view.findViewById(R.id.button1);
		button2 = (Button) popupWindow_view.findViewById(R.id.button2);
		button3 = (Button) popupWindow_view.findViewById(R.id.button3);
		button1.setOnClickListener(this);
		button2.setOnClickListener(this);
		button3.setOnClickListener(this);

	}

}

activity_main.xml代码：

<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"
    tools:context=".MainActivity" >

    <Button
        android:id="@+id/button"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="PopWindow" />

</RelativeLayout>

弹出的布局：

pop_win.xml代码

<?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:background="@android:color/darker_gray"
    android:orientation="vertical" >

    <Button
        android:id="@+id/button1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="button1" />

    <Button
        android:id="@+id/button2"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="button2" />

    <Button
        android:id="@+id/button3"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="button3" />

</LinearLayout>

style代码：

 <!-- Application theme. -->
    <style name="AppTheme" parent="AppBaseTheme">
        <!-- All customizations that are NOT specific to a particular API-level can go here. -->
    </style>

    <style name="AnimationFade">
 <!-- PopupWindow左右弹出的效果 -->
        <item name="android:windowEnterAnimation">@anim/in_lefttoright</item>
        <item name="android:windowExitAnimation">@anim/out_righttoleft</item>
    </style>

动画代码：

in_lefttoright.xml

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

    <!-- 定义从左向右进入的动画 -->
    <translate
        android:duration="500"
        android:fromXDelta="-100%"
        android:toXDelta="0" />

</set>

out_righttoleft.xml

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

    <!-- 定义从右向左动画退出动画 -->
    <translate
        android:duration="500"
        android:fromXDelta="0"
        android:toXDelta="-100%" />

</set>