Android Utililty Methods Bitmap Color Change

List of utility methods to do Bitmap Color Change

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Description

The list of methods to do Bitmap Color Change are organized into topic(s).

Method

int[]getGrayscaleHistogram(Bitmap bm)
get Grayscale Histogram 
int[] histogram = new int[256];
int ptr = 0;
while (ptr < histogram.length)
    histogram[ptr++] = 0;
int hlen = bm.getWidth(), vlen = bm.getHeight();
int pixel;
for (int y = 0; y < vlen; y++) {
    for (int x = 0; x < hlen; x++) {
...
BitmapincreaseGreen(Bitmap src, int value)
Increase green. 
int width = src.getWidth();
int height = src.getHeight();
final float factor = 1.1f;
Bitmap bmOut = Bitmap.createBitmap(width, height, src.getConfig());
int[] pix = new int[width * height];
src.getPixels(pix, 0, width, 0, 0, width, height);
int A, R, G, B;
int i = 0;
...
booleaninitAlphaChannel( BitmapFactory.Options bitmapOptions)
set bitmap options preferred config 
if (!TextUtils.isEmpty(bitmapOptions.outMimeType)) {
    if (mayNotHasAlphaChannel(bitmapOptions)) {
        bitmapOptions.inPreferredConfig = Bitmap.Config.RGB_565;
        bitmapOptions.inDither = false;
    } else {
        bitmapOptions.inPreferredConfig = Bitmap.Config.ARGB_8888;
    return true;
...
booleaninitBitmapFactoryOptions( BitmapFactory.Options bitmapOptions, int maxWidth, int maxHeight)
init Bitmap Factory Options 
if (bitmapOptions.inJustDecodeBounds && bitmapOptions.outHeight > 0
        && bitmapOptions.outWidth > 0) {
    if (bitmapOptions.outWidth > (maxWidth << 1)
            || bitmapOptions.outHeight > (maxHeight << 1)) {
        bitmapOptions.inSampleSize = Math.max(
                bitmapOptions.outWidth / maxWidth,
                bitmapOptions.outHeight / maxHeight);
    bitmapOptions.inJustDecodeBounds = false;
    return true;
return false;
BitmapmakeSaturated(Bitmap source, int level)
Make colors of bitmap saturated. 
int width = source.getWidth();
int height = source.getHeight();
int[] pixels = new int[width * height];
float[] HSV = new float[3];
source.getPixels(pixels, 0, width, 0, 0, width, height);
int index = 0;
for (int y = 0; y < height; ++y) {
    for (int x = 0; x < width; ++x) {
...
BitmapmakeVivid(Bitmap src, int type, float percent)
Make colors in bitmap vivid. 
int width = src.getWidth();
int height = src.getHeight();
Bitmap bmOut = Bitmap.createBitmap(width, height, src.getConfig());
int A, R, G, B;
int pixel;
for (int x = 0; x < width; ++x) {
    for (int y = 0; y < height; ++y) {
        pixel = src.getPixel(x, y);
...
BitmapsetAlpha(Bitmap sourceImg, int number)
set Alpha 
int[] argb = new int[sourceImg.getWidth() * sourceImg.getHeight()];
sourceImg.getPixels(argb, 0, sourceImg.getWidth(), 0, 0,
        sourceImg.getWidth(), sourceImg.getHeight());
number = number * 255 / 100;
for (int i = 0; i < argb.length; i++) {
    argb[i] = (number << 24) | (argb[i] & 0x00FFFFFF);
sourceImg = Bitmap.createBitmap(argb, sourceImg.getWidth(),
...
BitmapsetAlpha(Bitmap sourceImg, int number)
set Alpha 
int[] argb = new int[sourceImg.getWidth() * sourceImg.getHeight()];
sourceImg.getPixels(argb, 0, sourceImg.getWidth(), 0, 0,
        sourceImg.getWidth(), sourceImg.getHeight());
number = number * 255 / 100;
for (int i = 0; i < argb.length; i++) {
    argb[i] = (number << 24) | (argb[i] & 0x00FFFFFF);
sourceImg = Bitmap.createBitmap(argb, sourceImg.getWidth(),
...
BitmaptiltShift(Bitmap sentBitmap, int radius, int x, int y)
Tilt shift effect on bitmap. 
Bitmap bmp = sentBitmap.copy(sentBitmap.getConfig(), true);
int w = sentBitmap.getWidth();
int h = sentBitmap.getHeight();
int[] pix = new int[w * h];
bmp.getPixels(pix, 0, w, 0, 0, w, h);
int radiusSquared = 110 * 110;
for (int r = radius; r > 1; r /= 2) {
    for (int i = r; i < h - r; i++) {
...
BitmapchangeBitmapColor(Bitmap bmp, int color)
change Bitmap Color 
Bitmap result = Bitmap.createBitmap(bmp.getWidth(),
        bmp.getHeight(), bmp.getConfig());
Canvas c = new Canvas(result);
Paint paint = new Paint();
ColorFilter filter = new LightingColorFilter(color, 1);
paint.setColorFilter(filter);
c.drawBitmap(bmp, 0, 0, paint);
return result;
...