Example of using PopupWindow

android.widget.PopupWindow can be used to display an arbitrary view. The popup windows is a floating container that appears on top of the current activity.



Create /res/layout/popup.xml to define the view of the PopupWindow.

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" 
    android:background="@android:color/background_light">
 <LinearLayout 
     android:layout_width="wrap_content"
     android:layout_height="wrap_content"
     android:orientation="vertical" 
     android:layout_margin="1dp"
     android:background="@android:color/darker_gray">
     >
     <LinearLayout 
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:orientation="vertical" 
      android:layout_margin="20dp">
      <TextView
          android:layout_width="fill_parent"
          android:layout_height="wrap_content"
          android:text="It's a PopupWindow" />
      <ImageView
          android:layout_width="fill_parent"
          android:layout_height="wrap_content"
          android:src="@drawable/ic_launcher" />
      <Button
          android:id="@+id/dismiss"
          android:layout_width="fill_parent"
          android:layout_height="wrap_content"
          android:text="Dismiss" />
      </LinearLayout>
 </LinearLayout>
</LinearLayout>

Main activity Java code to handle the PopupWindow

package com.exercise.AndroidPopupWindow;

import android.app.Activity;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup.LayoutParams;
import android.widget.Button;
import android.widget.PopupWindow;

public class AndroidPopupWindowActivity extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        
        final Button btnOpenPopup = (Button)findViewById(R.id.openpopup);
        btnOpenPopup.setOnClickListener(new Button.OnClickListener(){

   @Override
   public void onClick(View arg0) {
    LayoutInflater layoutInflater 
     = (LayoutInflater)getBaseContext()
      .getSystemService(LAYOUT_INFLATER_SERVICE);  
    View popupView = layoutInflater.inflate(R.layout.popup, null);  
             final PopupWindow popupWindow = new PopupWindow(
               popupView, 
               LayoutParams.WRAP_CONTENT,  
                     LayoutParams.WRAP_CONTENT);  
             
             Button btnDismiss = (Button)popupView.findViewById(R.id.dismiss);
             btnDismiss.setOnClickListener(new Button.OnClickListener(){

     @Override
     public void onClick(View v) {
      // TODO Auto-generated method stub
      popupWindow.dismiss();
     }});
               
             popupWindow.showAsDropDown(btnOpenPopup, 50, -30);
         
   }});
    }
}

main.xml

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

    <TextView
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="@string/hello" />
    <Button
        android:id="@+id/openpopup"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="Open Popup Window" />
    
</LinearLayout>

Next:
- Disable outside PopupWindow, by setFocusable(true)

Related:
- PopupMenu, for Android 3.0(API Level 11)