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)