Android Utililty Methods Bitmap Scale

List of utility methods to do Bitmap Scale

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Description

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

Method

BitmapscaleImage(Bitmap image, float scale)
scales Bitmap to a decimal 
Bitmap data = Bitmap.createBitmap((int) (image.getWidth() * scale),
        (int) (image.getHeight() * scale), image.getConfig());
Canvas canvas = new Canvas(data);
canvas.drawBitmap(image,
        new Rect(0, 0, image.getWidth(), image.getHeight()),
        new Rect(0, 0, (int) (image.getWidth() * scale),
                (int) (image.getHeight() * scale)), null);
return data;
...
BitmapscaleImg(Bitmap bitmap, float scale)
scale Img 
Bitmap resizeBmp = null;
try {
    int bmpW = bitmap.getWidth();
    int bmpH = bitmap.getHeight();
    Matrix mt = new Matrix();
    mt.postScale(scale, scale);
    resizeBmp = Bitmap.createBitmap(bitmap, 0, 0, bmpW, bmpH, mt,
            true);
...
BitmapscaleImg(Bitmap bitmap, int newWidth, int newHeight)
scale Img 
Bitmap resizeBmp = null;
if (bitmap == null) {
    return null;
if (newWidth <= 0 || newHeight <= 0) {
    throw new IllegalArgumentException("???????????????0");
int srcWidth = bitmap.getWidth();
...
BitmapscaleImg(File file, int newWidth, int newHeight)
scale Img 
Bitmap resizeBmp = null;
if (newWidth <= 0 || newHeight <= 0) {
    throw new IllegalArgumentException("???????????????0");
BitmapFactory.Options opts = new BitmapFactory.Options();
opts.inJustDecodeBounds = true;
BitmapFactory.decodeFile(file.getPath(), opts);
int srcWidth = opts.outWidth;
...
BitmapgetScaleBitmap(Bitmap origialBitmap, int dstWidth, int dstHeight)
get Scale Bitmap 
Bitmap scaleBitmap = Bitmap.createScaledBitmap(origialBitmap,
        dstWidth, dstHeight, true);
if (origialBitmap != null && !origialBitmap.isRecycled()) {
    origialBitmap.recycle();
return scaleBitmap;
BitmapgetScaleBitmap(Context context, int resId, int dstWidth, int dstHeight)
get Scale Bitmap 
Bitmap origialBitmap = BitmapFactory.decodeResource(
        context.getResources(), resId);
Bitmap scaleBitmap = Bitmap.createScaledBitmap(origialBitmap,
        dstWidth, dstHeight, true);
if (origialBitmap != null && !origialBitmap.isRecycled()) {
    origialBitmap.recycle();
return scaleBitmap;
...
BitmapgetScaleImage(final Bitmap bitmap, final float boundBoxInDp)
get Scale Image 
final int width = bitmap.getWidth();
final int height = bitmap.getHeight();
final float xScale = boundBoxInDp / width;
final float yScale = boundBoxInDp / height;
final float scale = xScale <= yScale ? xScale : yScale;
final Matrix matrix = new Matrix();
matrix.postScale(scale, scale);
final Bitmap scaledBitmap = Bitmap.createBitmap(bitmap, 0, 0,
...
BitmapgenerateScaledBitmap(Bitmap bitmap, int width, int height)
Generates a bitmap scaled to provided width and height 
if (bitmap != null) {
    try {
        return Bitmap.createScaledBitmap(bitmap, width, height,
                true);
    } catch (IllegalArgumentException illegalArgs) {
        return null;
} else {
...
BitmapgenerateScaledBitmap(Drawable drawable, int width, int height)
Generates a bitmap scaled to provided width and height 
if (drawable != null && drawable instanceof BitmapDrawable) {
    Bitmap bitmap = ((BitmapDrawable) drawable).getBitmap();
    return generateScaledBitmap(bitmap, width, height);
} else {
    return null;
BitmapgenerateScaledBitmap(byte[] bitMapData, int width, int height)
Generates a bitmap scaled to provided width and height 
if (bitMapData != null) {
    try {
        Bitmap bitmap = BitmapFactory.decodeByteArray(bitMapData,
                0, bitMapData.length);
        return generateScaledBitmap(bitmap, width, height);
    } catch (ArrayIndexOutOfBoundsException indexOutOfBounds) {
        return null;
    } catch (IllegalArgumentException illegalArgs) {
...