Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
/*
 * Copyright (C) Stichting Akvo (Akvo Foundation)
 *
 * This file is part of Akvo Caddisfly.
 *
 * Akvo Caddisfly is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * Akvo Caddisfly is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with Akvo Caddisfly. If not, see <http://www.gnu.org/licenses/>.
 */

import android.graphics.Bitmap;

import android.graphics.Canvas;

import android.graphics.ColorMatrixColorFilter;

import android.graphics.Paint;

import android.support.annotation.NonNull;

public class Main {
    private static final float[] MATRIX = new float[] { 0.3f, 0.59f, 0.11f, 0, 0, 0.3f, 0.59f, 0.11f, 0, 0, 0.3f,
            0.59f, 0.11f, 0, 0, 0, 0, 0, 1, 0 };

    public static Bitmap getGrayscale(@NonNull Bitmap src) {

        Bitmap dest = Bitmap.createBitmap(src.getWidth(), src.getHeight(), src.getConfig());

        Canvas canvas = new Canvas(dest);
        Paint paint = new Paint();
        ColorMatrixColorFilter filter = new ColorMatrixColorFilter(MATRIX);
        paint.setColorFilter(filter);
        canvas.drawBitmap(src, 0, 0, paint);

        return dest;
    }
}