Android Utililty Methods Bitmap Resize

List of utility methods to do Bitmap Resize

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Description

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

Method

BitmapgetResizedBitmap(Bitmap bm, int newHeight, int newWidth)
get Resized Bitmap 
final int w = bm.getWidth();
final int h = bm.getHeight();
final float sw = ((float) newWidth) / w;
final float sh = ((float) newHeight) / h;
Matrix matrix = new Matrix();
matrix.postScale(sw, sh);
return Bitmap.createBitmap(bm, 0, 0, w, h, matrix, false);
BitmapgetResizedBitmap(Bitmap bm, int maxX, int maxY, double maxRatio)
Downsize the bitmap to at most the indicated ratio of the max specified size 
if (null == bm) {
    return bm;
int height = bm.getHeight();
int width = bm.getWidth();
if (0 == height || 0 == width) {
    return bm;
double ratio = height / width;
int newHeight = (int) (Math.min(maxX, maxY) * maxRatio);
int newWidth = (int) (newHeight / ratio);
if (newHeight >= height && newWidth >= width) {
    return bm;
float scaleWidth = ((float) newWidth) / width;
float scaleHeight = ((float) newHeight) / height;
Matrix matrix = new Matrix();
matrix.postScale(scaleWidth, scaleHeight);
try {
    Bitmap resizedBitmap = Bitmap.createBitmap(bm, 0, 0, width,
            height, matrix, false);
    return resizedBitmap;
} catch (Exception e) {
    return bm;
BitmapgetSafeResizingBitmap(String strImagePath, int nMaxResizedWidth, int nMaxResizedHeight, boolean checkOrientation)
Get the image bitmap that resizing to maximum size of limit. 
BitmapFactory.Options options = getBitmapSize(strImagePath);
if (options == null)
    return null;
int nSampleSize;
int degree = 0;
if (checkOrientation) {
    degree = getExifDegree(strImagePath);
if (degree == 90 || degree == 270) {
    nSampleSize = getSafeResizingSampleSize(options.outHeight,
            options.outWidth, nMaxResizedWidth, nMaxResizedHeight);
} else {
    nSampleSize = getSafeResizingSampleSize(options.outWidth,
            options.outHeight, nMaxResizedWidth, nMaxResizedHeight);
options.inJustDecodeBounds = false;
options.inSampleSize = nSampleSize;
options.inDither = false;
options.inPreferredConfig = Bitmap.Config.ARGB_8888;
options.inPurgeable = true;
Bitmap photo = BitmapFactory.decodeFile(strImagePath, options);
if (checkOrientation && (degree == 90 || degree == 270)) {
    return getRotatedBitmap(photo, degree);
return photo;