android popupWindow使用

<?xml version="1.0" encoding="utf-8"?><RelativeLayoutandroid:id="@+id/main"xmlns:android="http://schemas.android.com/apk/res/android"android:layout_width="match_parent"android:layout_height="match_parent"><Buttonandroid:id="@+id/button"android:layout_width="match_parent"android:layout_height="wrap_content"android:text="show popupwindow"/><Buttonandroid:id="@+id/button1"android:layout_below="@+id/button"android:layout_width="match_parent"android:layout_height="wrap_content"android:text="hide popupwindow"/></RelativeLayout>

<?xml version="1.0" encoding="utf-8"?><LinearLayoutxmlns:android="http://schemas.android.com/apk/res/android"android:layout_width="match_parent"android:layout_height="wrap_content"android:orientation="horizontal"><TextViewandroid:layout_width="wrap_content"android:layout_height="wrap_content"android:text="I am a popupWindow !"android:textSize="25sp"/></LinearLayout>

package com.datong.mypopupwindow;import android.app.Activity;import android.os.Bundle;import android.view.Gravity;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import android.widget.Button;import android.widget.PopupWindow;public class MainActivity extends Activity {private Button button,button1;private PopupWindow mpopupWindow;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);button = (Button) findViewById(R.id.button);button1 = (Button) findViewById(R.id.button1);button.setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View v) {LayoutInflater inflater = getLayoutInflater();View popupWindow = inflater.inflate(R.layout.popupwindow, null);mpopupWindow = new PopupWindow(popupWindow, ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT);mpopupWindow.showAtLocation(findViewById(R.id.main), Gravity.BOTTOM,0,0);}});button1.setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View v) {mpopupWindow.dismiss();}});}}