Before Tint Color Effect
After Tint Color Effect
Tint Degree=30 |
Tint Degree=30 |
Tint Degree=50 |
Tint Degree=80 |
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
- 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/car" /> </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; public static final double PI = 3.14159d; public static final double FULL_CIRCLE_DEGREE = 360d; public static final double HALF_CIRCLE_DEGREE = 180d; public static final double RANGE = 256d; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); imViewAndroid = (ImageView) findViewById(R.id.imViewAndroid); imViewAndroid.setImageBitmap(applyTintEffect(BitmapFactory.decodeResource(getResources(), R.drawable.car),80)); } public Bitmap applyTintEffect(Bitmap src, int degree) { // get source image size int width = src.getWidth(); int height = src.getHeight(); int[] pix = new int[width * height]; // get pixel array from source src.getPixels(pix, 0, width, 0, 0, width, height); int RY, GY, BY, RYY, GYY, BYY, R, G, B, Y; double angle = (PI * (double)degree) / HALF_CIRCLE_DEGREE; int S = (int)(RANGE * Math.sin(angle)); int C = (int)(RANGE * Math.cos(angle)); for (int y = 0; y < height; y++) for (int x = 0; x < width; x++) { int index = y * width + x; int r = ( pix[index] >> 16 ) & 0xff; int g = ( pix[index] >> 8 ) & 0xff; int b = pix[index] & 0xff; RY = ( 70 * r - 59 * g - 11 * b ) / 100; GY = (-30 * r + 41 * g - 11 * b ) / 100; BY = (-30 * r - 59 * g + 89 * b ) / 100; Y = ( 30 * r + 59 * g + 11 * b ) / 100; RYY = ( S * BY + C * RY ) / 256; BYY = ( C * BY - S * RY ) / 256; GYY = (-51 * RYY - 19 * BYY ) / 100; R = Y + RYY; R = ( R < 0 ) ? 0 : (( R > 255 ) ? 255 : R ); G = Y + GYY; G = ( G < 0 ) ? 0 : (( G > 255 ) ? 255 : G ); B = Y + BYY; B = ( B < 0 ) ? 0 : (( B > 255 ) ? 255 : B ); pix[index] = 0xff000000 | (R << 16) | (G << 8 ) | B; } // output bitmap Bitmap outBitmap = Bitmap.createBitmap(width, height, src.getConfig()); outBitmap.setPixels(pix, 0, width, 0, 0, width, height); pix = null; return outBitmap; } }
3. note that:
- i know that,it is a quite complicated algorithm, yet I also don’t really understand it clearly.I’ve found it at this link Working with images in Google Android
- With the help of this,applyTintEffect() method you can apply Tint Color Effect on image on click,on action_down etc.
4. conclusion:
- Some deep information about Tint Color effect .
- Know how to apply Tint Color Effect on image bitmap from drawables.
5. About the post:
- The code seems to explain itself due to comments, and is very easy to understand.
- I Think this Rocking algorithm,what do you think?
- 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,
you can download the source code here
Hamad Ali Shaikh