Before Pixel Color Replacement
After Pixel Color Replacement
Create new Android Project
Project Name: PlayingwithBitmap
Build Target: Android 2.3.3 //or greater than that
Application Name: PlayingwithBitmap
Package Name: com.shaikhhamadali.blogspot.playingwithbitmap
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="#ffffff" > <ImageView android:id="@+id/imViewAndroid" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_centerInParent="true" android:src="@drawable/car" /> </RelativeLayout>
package com.shaikhhamadali.blogspot.playingwithbitmaps; import android.os.Bundle; import android.app.Activity; import android.graphics.Bitmap; import android.graphics.BitmapFactory; import android.graphics.Canvas; import android.graphics.Color; import android.graphics.Paint; import android.view.Menu; 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); Bitmap b=replaceColor(BitmapFactory.decodeResource(getResources(), R.drawable.basic),Color.YELLOW,Color.MAGENTA); imViewAndroid.setImageBitmap(b); } public Bitmap replaceColor(Bitmap src,int fromColor, int targetColor) { if(src == null) { return null; } // Source image size int width = src.getWidth(); int height = src.getHeight(); int[] pixels = new int[width * height]; //get pixels src.getPixels(pixels, 0, width, 0, 0, width, height); for(int x = 0; x < pixels.length; ++x) { pixels[x] = (pixels[x] == fromColor) ? targetColor : pixels[x]; } // create result bitmap output Bitmap result = Bitmap.createBitmap(width, height, src.getConfig()); //set pixels result.setPixels(pixels, 0, width, 0, 0, width, height); return result; } }
3. note that:
- With the help of this,replaceColor() method you can Replace the color of image on image on click,on action_down,on the fly etc.
- You can cut the required area of image by changing their color into Color.Transparent.
4. conclusion:
- Some information about Color Replacement.
- Know how to Replace image bitmap colors from drawables.
5. About the post:
- 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!
Hamad Ali Shaikh