Android popupwindow弹出对话框

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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;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);button = (Button) findViewById(R.id.button);button.setOnClickListener(this);}@Overridepublic 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() {@Overridepublic 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" ><Buttonandroid: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" ><Buttonandroid:id="@+id/button1"android:layout_width="match_parent"android:layout_height="wrap_content"android:text="button1" /><Buttonandroid:id="@+id/button2"android:layout_width="match_parent"android:layout_height="wrap_content"android:text="button2" /><Buttonandroid: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 --><translateandroid: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 --><translateandroid:duration="500"android:fromXDelta="0"android:toXDelta="-100%" /></set>

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