Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
import android.graphics.Bitmap;

import android.graphics.Color;

public class Main {
    public static Bitmap doGray(Bitmap src) {
        final double GS_RED = 0.299;
        final double GS_GREEN = 0.587;
        final double GS_BLUE = 0.114;

        Bitmap bmOut = Bitmap.createBitmap(src.getWidth(), src.getHeight(), src.getConfig());
        int A, R, G, B, pixel;
        int w = src.getWidth();
        int h = src.getHeight();
        for (int x = 0; x < w; x++) {
            for (int y = 0; y < h; y++) {
                pixel = src.getPixel(x, y);

                A = Color.alpha(pixel);
                R = Color.red(pixel);
                G = Color.green(pixel);
                B = Color.blue(pixel);
                R = G = B = (int) (GS_RED * R + GS_GREEN * G + GS_BLUE * B);
                bmOut.setPixel(x, y, Color.argb(A, R, G, B));
            }
        }
        return bmOut;
    }
}