Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
//License from project: Open Source License 

import android.graphics.Bitmap;

import android.graphics.Color;

public class Main {

    public static Bitmap olderImage(Bitmap bm) {

        int width = bm.getWidth();
        int height = bm.getHeight();
        int color;
        int r, g, b, a;

        Bitmap bitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);

        int[] oldPx = new int[width * height];
        int[] newPx = new int[width * height];

        bm.getPixels(oldPx, 0, width, 0, 0, width, height);

        for (int i = 0; i < oldPx.length; i++) {
            color = oldPx[i];
            r = Color.red(color);
            g = Color.green(color);
            b = Color.blue(color);
            a = Color.alpha(color);

            r = (int) (0.393 * r + 0.769 * g + 0.189 * b);
            g = (int) (0.349 * r + 0.686 * g + 0.168 * b);
            b = (int) (0.272 * r + 0.534 * g + 0.131 * b);

            if (r > 255) {
                r = 255;
            } else if (r < 0) {
                r = 0;
            }

            if (g > 255) {
                g = 255;
            } else if (g < 0) {
                g = 0;
            }

            if (b > 255) {
                b = 255;
            } else if (b < 0) {
                b = 0;
            }

            newPx[i] = Color.argb(a, r, g, b);
        }

        bitmap.setPixels(newPx, 0, width, 0, 0, width, height);
        return bitmap;
    }
}