do Bitmap Image Invert - Android Graphics

Android examples for Graphics:Bitmap Effect

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Description

do Bitmap Image Invert

Demo Code


//package com.java2s;

import android.graphics.Bitmap;

import android.graphics.Color;

public class Main {
    public static Bitmap doInvert(Bitmap src) {
        Bitmap bmOut = Bitmap.createBitmap(src.getWidth(), src.getHeight(),
                src.getConfig());/*from   ww w  .  j  av a 2s .  co  m*/
        // color info
        int A, R, G, B;
        int pixelColor;
        // image size
        int height = src.getHeight();
        int width = src.getWidth();

        // scan through every pixel
        for (int y = 0; y < height; y++) {
            for (int x = 0; x < width; x++) {
                // get one pixel
                pixelColor = src.getPixel(x, y);
                // saving alpha channel
                A = Color.alpha(pixelColor);
                R = 255 - Color.red(pixelColor);
                G = 255 - Color.green(pixelColor);
                B = 255 - Color.blue(pixelColor);
                bmOut.setPixel(x, y, Color.argb(A, R, G, B));
            }
        }

        // return final bitmap
        return bmOut;
    }
}

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