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.Canvas;

import android.graphics.ColorMatrix;
import android.graphics.ColorMatrixColorFilter;
import android.graphics.Paint;

public class Main {

    public static Bitmap generateGrayImage(Bitmap bm) {
        Bitmap bitmap = Bitmap.createBitmap(bm.getWidth(), bm.getHeight(), Bitmap.Config.ARGB_8888);
        Canvas canvas = new Canvas(bitmap);
        Paint paint = new Paint();

        float[] matrixs = new float[] { 0.33f, 0.59f, 0.11f, 0, 0, 0.33f, 0.59f, 0.11f, 0, 0, 0.33f, 0.59f, 0.11f,
                0, 0, 0, 0, 0, 1, 0 };

        ColorMatrix colorMatrix = new ColorMatrix();
        colorMatrix.set(matrixs);
        paint.setColorFilter(new ColorMatrixColorFilter(colorMatrix));

        canvas.drawBitmap(bm, 0, 0, paint);

        return bitmap;
    }
}