Smooth Effect on image in ImageView (Android)

Before Smooth Effect

After Smooth Effect

Create new Android Project

Project Name: PlayingwithBitmaps

Build Target: Android 2.3.3   //or greater than that

Application Name: PlayingwithBitmaps

Package Name: com.hamad.playingwithbitmaps

Create Activity: Main

Min SDK: 10 // or greater than that

  1.create main layout:

• One image view to display the image.

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="#000000"
    android:id="@+id/rlMain" >

    <ImageView
        android:id="@+id/imViewAndroid"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerInParent="true"
        android:src="@drawable/beautiful" />

</RelativeLayout>

 2. code of main activity:

package com.shaikhhamadali.blogspot.playingwithbitmaps;

import android.os.Bundle;
import android.app.Activity;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.widget.ImageView;

public class Main extends Activity {
 ImageView imViewAndroid;
 @Override
 protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_main);
  imViewAndroid = (ImageView) findViewById(R.id.imViewAndroid);
  imViewAndroid.setImageBitmap(applySmoothEffect(BitmapFactory.decodeResource(getResources(), R.drawable.beautiful),5));
 }
 public Bitmap applySmoothEffect(Bitmap src, double value) {
  //create convolution matrix instance
  ConvolutionMatrix convMatrix = new ConvolutionMatrix(3);
  convMatrix.setAll(1);
  convMatrix.Matrix[1][1] = value;
  // set weight of factor and offset
  convMatrix.Factor = value + 8;
  convMatrix.Offset = 1;
  return ConvolutionMatrix.computeConvolution3x3(src, convMatrix);
 }}

  3. note that:

• For better understanding please refer to my previous post:convolution matrix
• With the help of this,applySmoothEffect() method you can apply Smooth Effect on image on click,on action_down etc.

  4. conclusion:

• Some deep information about Smooth effect .
• Know how to apply Smooth effect on image bitmap from drawables.

  5. About the post:

The applied matrix for the effect:[ 1 | 1 | 1 ][ 1 | 5 | 1 ][ 1 | 1 | 1 ]The factor is 13 and offset 1.

•  The code seems to explain itself due to comments, and is very easy to understand.
•  Don’t mind to write a comment whatever you like to ask, to know,to suggest or recommend.
•  Hope you enjoy it!

  6. Source Code:

        you can download the source code here

Cheers,

Hamad Ali Shaikh