| Methods Summary |
|---|
| public static byte[] | compressToBytes(android.graphics.Bitmap bitmap)
return compressToBytes(bitmap, DEFAULT_JPEG_QUALITY);
|
| public static byte[] | compressToBytes(android.graphics.Bitmap bitmap, int quality)
ByteArrayOutputStream baos = new ByteArrayOutputStream(65536);
bitmap.compress(CompressFormat.JPEG, quality, baos);
return baos.toByteArray();
|
| private static int | computeInitialSampleSize(int w, int h, int minSideLength, int maxNumOfPixels)
if (maxNumOfPixels == UNCONSTRAINED
&& minSideLength == UNCONSTRAINED) return 1;
int lowerBound = (maxNumOfPixels == UNCONSTRAINED) ? 1 :
(int) FloatMath.ceil(FloatMath.sqrt((float) (w * h) / maxNumOfPixels));
if (minSideLength == UNCONSTRAINED) {
return lowerBound;
} else {
int sampleSize = Math.min(w / minSideLength, h / minSideLength);
return Math.max(sampleSize, lowerBound);
}
|
| public static int | computeSampleSize(int width, int height, int minSideLength, int maxNumOfPixels)
int initialSize = computeInitialSampleSize(
width, height, minSideLength, maxNumOfPixels);
return initialSize <= 8
? Utils.nextPowerOf2(initialSize)
: (initialSize + 7) / 8 * 8;
|
| public static int | computeSampleSize(float scale)
Utils.assertTrue(scale > 0);
int initialSize = Math.max(1, (int) FloatMath.ceil(1 / scale));
return initialSize <= 8
? Utils.nextPowerOf2(initialSize)
: (initialSize + 7) / 8 * 8;
|
| public static int | computeSampleSizeLarger(int w, int h, int minSideLength)
int initialSize = Math.max(w / minSideLength, h / minSideLength);
if (initialSize <= 1) return 1;
return initialSize <= 8
? Utils.prevPowerOf2(initialSize)
: initialSize / 8 * 8;
|
| public static int | computeSampleSizeLarger(float scale)
int initialSize = (int) FloatMath.floor(1f / scale);
if (initialSize <= 1) return 1;
return initialSize <= 8
? Utils.prevPowerOf2(initialSize)
: initialSize / 8 * 8;
|
| public static android.graphics.Bitmap | createVideoThumbnail(java.lang.String filePath)
// MediaMetadataRetriever is available on API Level 8
// but is hidden until API Level 10
Class<?> clazz = null;
Object instance = null;
try {
clazz = Class.forName("android.media.MediaMetadataRetriever");
instance = clazz.newInstance();
Method method = clazz.getMethod("setDataSource", String.class);
method.invoke(instance, filePath);
// The method name changes between API Level 9 and 10.
if (Build.VERSION.SDK_INT <= 9) {
return (Bitmap) clazz.getMethod("captureFrame").invoke(instance);
} else {
byte[] data = (byte[]) clazz.getMethod("getEmbeddedPicture").invoke(instance);
if (data != null) {
Bitmap bitmap = BitmapFactory.decodeByteArray(data, 0, data.length);
if (bitmap != null) return bitmap;
}
return (Bitmap) clazz.getMethod("getFrameAtTime").invoke(instance);
}
} catch (IllegalArgumentException ex) {
// Assume this is a corrupt video file
} catch (RuntimeException ex) {
// Assume this is a corrupt video file.
} catch (InstantiationException e) {
Log.e(TAG, "createVideoThumbnail", e);
} catch (InvocationTargetException e) {
Log.e(TAG, "createVideoThumbnail", e);
} catch (ClassNotFoundException e) {
Log.e(TAG, "createVideoThumbnail", e);
} catch (NoSuchMethodException e) {
Log.e(TAG, "createVideoThumbnail", e);
} catch (IllegalAccessException e) {
Log.e(TAG, "createVideoThumbnail", e);
} finally {
try {
if (instance != null) {
clazz.getMethod("release").invoke(instance);
}
} catch (Exception ignored) {
}
}
return null;
|
| private static Bitmap.Config | getConfig(android.graphics.Bitmap bitmap)
Bitmap.Config config = bitmap.getConfig();
if (config == null) {
config = Bitmap.Config.ARGB_8888;
}
return config;
|
| public static boolean | isRotationSupported(java.lang.String mimeType)
if (mimeType == null) return false;
mimeType = mimeType.toLowerCase();
return mimeType.equals("image/jpeg");
|
| public static boolean | isSupportedByRegionDecoder(java.lang.String mimeType)
if (mimeType == null) return false;
mimeType = mimeType.toLowerCase();
return mimeType.startsWith("image/") &&
(!mimeType.equals("image/gif") && !mimeType.endsWith("bmp"));
|
| public static void | recycleSilently(android.graphics.Bitmap bitmap)
if (bitmap == null) return;
try {
bitmap.recycle();
} catch (Throwable t) {
Log.w(TAG, "unable recycle bitmap", t);
}
|
| public static android.graphics.Bitmap | resizeAndCropCenter(android.graphics.Bitmap bitmap, int size, boolean recycle)
int w = bitmap.getWidth();
int h = bitmap.getHeight();
if (w == size && h == size) return bitmap;
// scale the image so that the shorter side equals to the target;
// the longer side will be center-cropped.
float scale = (float) size / Math.min(w, h);
Bitmap target = Bitmap.createBitmap(size, size, getConfig(bitmap));
int width = Math.round(scale * bitmap.getWidth());
int height = Math.round(scale * bitmap.getHeight());
Canvas canvas = new Canvas(target);
canvas.translate((size - width) / 2f, (size - height) / 2f);
canvas.scale(scale, scale);
Paint paint = new Paint(Paint.FILTER_BITMAP_FLAG | Paint.DITHER_FLAG);
canvas.drawBitmap(bitmap, 0, 0, paint);
if (recycle) bitmap.recycle();
return target;
|
| public static android.graphics.Bitmap | resizeBitmapByScale(android.graphics.Bitmap bitmap, float scale, boolean recycle)
int width = Math.round(bitmap.getWidth() * scale);
int height = Math.round(bitmap.getHeight() * scale);
if (width == bitmap.getWidth()
&& height == bitmap.getHeight()) return bitmap;
Bitmap target = Bitmap.createBitmap(width, height, getConfig(bitmap));
Canvas canvas = new Canvas(target);
canvas.scale(scale, scale);
Paint paint = new Paint(Paint.FILTER_BITMAP_FLAG | Paint.DITHER_FLAG);
canvas.drawBitmap(bitmap, 0, 0, paint);
if (recycle) bitmap.recycle();
return target;
|
| public static android.graphics.Bitmap | resizeDownBySideLength(android.graphics.Bitmap bitmap, int maxLength, boolean recycle)
int srcWidth = bitmap.getWidth();
int srcHeight = bitmap.getHeight();
float scale = Math.min(
(float) maxLength / srcWidth, (float) maxLength / srcHeight);
if (scale >= 1.0f) return bitmap;
return resizeBitmapByScale(bitmap, scale, recycle);
|
| public static android.graphics.Bitmap | rotateBitmap(android.graphics.Bitmap source, int rotation, boolean recycle)
if (rotation == 0) return source;
int w = source.getWidth();
int h = source.getHeight();
Matrix m = new Matrix();
m.postRotate(rotation);
Bitmap bitmap = Bitmap.createBitmap(source, 0, 0, w, h, m, true);
if (recycle) source.recycle();
return bitmap;
|
