ExifInterface exif = null;
byte [] thumbData = null;
try {
exif = new ExifInterface(filePath);
if (exif != null) {
thumbData = exif.getThumbnail();
}
} catch (IOException ex) {
Log.w(TAG, ex);
}
BitmapFactory.Options fullOptions = new BitmapFactory.Options();
BitmapFactory.Options exifOptions = new BitmapFactory.Options();
int exifThumbWidth = 0;
int fullThumbWidth = 0;
// Compute exifThumbWidth.
if (thumbData != null) {
exifOptions.inJustDecodeBounds = true;
BitmapFactory.decodeByteArray(thumbData, 0, thumbData.length, exifOptions);
exifOptions.inSampleSize = computeSampleSize(exifOptions, targetSize, maxPixels);
exifThumbWidth = exifOptions.outWidth / exifOptions.inSampleSize;
}
// Compute fullThumbWidth.
fullOptions.inJustDecodeBounds = true;
BitmapFactory.decodeFile(filePath, fullOptions);
fullOptions.inSampleSize = computeSampleSize(fullOptions, targetSize, maxPixels);
fullThumbWidth = fullOptions.outWidth / fullOptions.inSampleSize;
// Choose the larger thumbnail as the returning sizedThumbBitmap.
if (thumbData != null && exifThumbWidth >= fullThumbWidth) {
int width = exifOptions.outWidth;
int height = exifOptions.outHeight;
exifOptions.inJustDecodeBounds = false;
sizedThumbBitmap.mBitmap = BitmapFactory.decodeByteArray(thumbData, 0,
thumbData.length, exifOptions);
if (sizedThumbBitmap.mBitmap != null) {
sizedThumbBitmap.mThumbnailData = thumbData;
sizedThumbBitmap.mThumbnailWidth = width;
sizedThumbBitmap.mThumbnailHeight = height;
}
} else {
fullOptions.inJustDecodeBounds = false;
sizedThumbBitmap.mBitmap = BitmapFactory.decodeFile(filePath, fullOptions);
}
}
}