Popup menu - android Sample Code

How to implement a popup menu - Android 2.1 

Popup Menu is available in Android SDK 11 on wards. Here I am implementing the concept of popup menu in SDK 7. A Button when clicked should show a Popup Menu. 

In the onCreate of the main activity we have to inflate the layout of the menu which we intend to show as popup.

 inflater = (LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE);
 popupView = inflater.inflate(R.layout.menu_layout, null, false);

Here, menu_layout is the desired layout you wish to show as popup.
the onClick method for the button to show the popup is

public void showPopup(View view) {
    pw = new PopupWindow(getApplicationContext());
    pw.setTouchable(true);
    pw.setFocusable(true);
    pw.setOutsideTouchable(true);
    pw.setTouchInterceptor(new OnTouchListener() {
        public boolean onTouch(View v, MotionEvent event) {
            if (event.getAction() == MotionEvent.ACTION_OUTSIDE) {
                pw.dismiss();

                return true;
            }

            return false;
        }
    });

    pw.setWidth(WindowManager.LayoutParams.WRAP_CONTENT);
    pw.setHeight(WindowManager.LayoutParams.WRAP_CONTENT);
    pw.setOutsideTouchable(false);
    pw.setContentView(popupView);
    pw.showAsDropDown(view, 0, 0);

}

Here's the XML layout of the main activity

<?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" >


    <Button
        android:id="@+id/btn1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:layout_marginTop="50dip"
        android:onClick="showPopup"
        android:text="@string/showPopup" />

</LinearLayout>

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