Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
//License from project: Apache License 

import android.graphics.Bitmap;
import android.graphics.Bitmap.Config;

import android.graphics.Canvas;
import android.graphics.ColorMatrix;
import android.graphics.ColorMatrixColorFilter;

import android.graphics.Paint;

public class Main {
    public static final Bitmap alpha(Bitmap bitmap, int alpha) {
        float[] matrixItems = new float[] { 1, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, alpha / 255f, 0,
                0, 0, 0, 0, 1 };
        int width = bitmap.getWidth();
        int height = bitmap.getHeight();
        Bitmap alphaBitmap = Bitmap.createBitmap(width, height, Config.ARGB_8888);
        Canvas canvas = new Canvas(alphaBitmap);
        Paint paint = new Paint();
        ColorMatrix colorMatrix = new ColorMatrix(matrixItems);
        ColorMatrixColorFilter colorMatrixFilter = new ColorMatrixColorFilter(colorMatrix);
        paint.setColorFilter(colorMatrixFilter);
        canvas.drawBitmap(bitmap, 0, 0, paint);
        return alphaBitmap;
    }
}