/**
* Decode and sample down a bitmap from a file to the requested width and height.
*
* @param filename The full path of the file to decode
* @param reqWidth The requested width of the resulting bitmap
* @param reqHeight The requested height of the resulting bitmap
* @param cache The ImageCache used to find candidate bitmaps for use with inBitmap
* @return A bitmap sampled down from the original with the same aspect ratio and dimensions that
* are equal to or greater than the requested width and height
*/
public static Bitmap decodeSampledBitmapFromFile(
String filename, int reqWidth, int reqHeight, ImageCache cache) {
// First decode with inJustDecodeBounds=true to check dimensions
final BitmapFactory.Options options = new BitmapFactory.Options();
options.inJustDecodeBounds = true;
BitmapFactory.decodeFile(filename, options);
// Calculate inSampleSize
options.inSampleSize = calculateInSampleSize(options, reqWidth, reqHeight);
// If we're running on Honeycomb or newer, try to use inBitmap
if (Utils.hasHoneycomb()) {
addInBitmapOptions(options, cache);
}
// Decode bitmap with inSampleSize set
options.inJustDecodeBounds = false;
return BitmapFactory.decodeFile(filename, options);
}
/**
* Decode and sample down a bitmap from resources to the requested width and height.
*
* @param res The resources object containing the image data
* @param resId The resource id of the image data
* @param reqWidth The requested width of the resulting bitmap
* @param reqHeight The requested height of the resulting bitmap
* @param cache The ImageCache used to find candidate bitmaps for use with inBitmap
* @return A bitmap sampled down from the original with the same aspect ratio and dimensions that
* are equal to or greater than the requested width and height
*/
public static Bitmap decodeSampledBitmapFromResource(
Resources res, int resId, int reqWidth, int reqHeight, ImageCache cache) {
// BEGIN_INCLUDE (read_bitmap_dimensions)
// First decode with inJustDecodeBounds=true to check dimensions
final BitmapFactory.Options options = new BitmapFactory.Options();
options.inJustDecodeBounds = true;
BitmapFactory.decodeResource(res, resId, options);
// Calculate inSampleSize
options.inSampleSize = calculateInSampleSize(options, reqWidth, reqHeight);
// END_INCLUDE (read_bitmap_dimensions)
// If we're running on Honeycomb or newer, try to use inBitmap
if (Utils.hasHoneycomb()) {
addInBitmapOptions(options, cache);
}
// Decode bitmap with inSampleSize set
options.inJustDecodeBounds = false;
return BitmapFactory.decodeResource(res, resId, options);
}