Please use below class and pass the bitmap to this function and get return bitmap with gray scale effect.
public class GrayFilter {
// satutarion --- 1.0 , 0.5 and 0
public static Bitmap
changeToGray(Bitmap bitmap) {
return changeToGray(bitmap,
0);
}
public static Bitmap
changeToGray(Bitmap bitmap,float sat) {
int width, height;
width
= bitmap.getWidth();
height
= bitmap.getHeight();
Bitmap
grayBitmap = Bitmap.createBitmap(width, height, Bitmap.Config.RGB_565);
Canvas
canvas = new Canvas(grayBitmap);
Paint
paint = new Paint();
paint.setAntiAlias(true);
ColorMatrix
colorMatrix = new ColorMatrix();
colorMatrix.setSaturation(sat);
ColorMatrixColorFilter
filter = new ColorMatrixColorFilter(colorMatrix);
paint.setColorFilter(filter);
canvas.drawBitmap(bitmap,
0, 0, paint);
return grayBitmap;
}
}
By: NovaRadix Technology.
