android - set a ripple effect on own picture in android

Question

i want create a LIVE WALLPAPER with ripple effect on our own pix. first prblem is - how to set wallpaper which is selected in iemageview. and how to create a ripple effect on it.

import java.io.IOException;

import android.app.Activity;
import android.app.WallpaperManager;
import android.content.Intent;
import android.database.Cursor;
import android.graphics.BitmapFactory;
import android.net.Uri;
import android.os.Bundle;
import android.provider.MediaStore;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemSelectedListener;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.Spinner;
import android.widget.Toast;

public class MainActivity extends Activity {


private static int RESULT_LOAD_IMAGE = 1;


@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    Button b =(Button) findViewById(R.id.settings);

    b.setOnClickListener(new View.OnClickListener() {

        @Override
         public void onClick(View arg0) {
            // TODO Auto-generated method stub
            WallpaperManager myWallpaperManager
            = WallpaperManager.getInstance(getApplicationContext());
            try {
                myWallpaperManager.setResource());
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
            }});



    Button buttonLoadImage = (Button) findViewById(R.id.setw);

    buttonLoadImage.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View arg0) {

            Intent i = new Intent(
                    Intent.ACTION_PICK,
                    android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);

            startActivityForResult(i, RESULT_LOAD_IMAGE);
        }
    });
}


@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);

    if (requestCode == RESULT_LOAD_IMAGE && resultCode == RESULT_OK && null != data) {
        Uri selectedImage = data.getData();
        String[] filePathColumn = { MediaStore.Images.Media.DATA };

        Cursor cursor = getContentResolver().query(selectedImage,
                filePathColumn, null, null, null);
        cursor.moveToFirst();

        int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
        String picturePath = cursor.getString(columnIndex);
        cursor.close();

        ImageView imageView = (ImageView) findViewById(R.id.imgView);
        imageView.setImageBitmap(BitmapFactory.decodeFile(picturePath));

    }


}

}