Problems with scaling image to thumbnail size and load in imageview to save memory
I am trying to scale my images down to smaller size I was loa开发者_运维技巧ding them as they were into an imageview and I started getting a "bitmap size exceeds VM budget" exception. On the other hand if I get the thumbnails instead of the actual images and show them it runs smooth. But I need the URIs of the actual images for later use which I can't get if I straight away load the thumbnails.
After looking around, I found a way, but it's not working.
Code:
Uri uri = Uri.withAppendedPath(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, name);
uriList.add(uri.getPath());
File image = new File(uri.getPath());
BitmapFactory.Options options = new BitmapFactory.Options();
options.inSampleSize = 2;
Bitmap actualBitmap = BitmapFactory.decodeFile(image.getPath(), options);
Bitmap scaledBitmap = Bitmap.createScaledBitmap(actualBitmap, image_width, image_height, false);
iv.setImageBitmap(scaledBitmap);
The part where I get the actualBitmap returns null, and so the imageview is empty. If I print uri.getpath()
it gives:
/external/images/media//sdcard/dcim/Camera/imagename.jpg
My question is, is this the right approach? If it is, what am I doing wrong and if it's not can someone please point me in the right direction.
try with the following code
public static Bitmap resizeBitMapImage1(String filePath, int targetWidth,
int targetHeight) {
Bitmap bitMapImage = null;
// First, get the dimensions of the image
Options options = new Options();
options.inJustDecodeBounds = true;
BitmapFactory.decodeFile(filePath, options);
double sampleSize = 0;
// Only scale if we need to
// (16384 buffer for img processing)
Boolean scaleByHeight = Math.abs(options.outHeight - targetHeight) >= Math
.abs(options.outWidth - targetWidth);
if (options.outHeight * options.outWidth * 2 >= 1638) {
// Load, scaling to smallest power of 2 that'll get it <= desired
// dimensions
sampleSize = scaleByHeight ? options.outHeight / targetHeight
: options.outWidth / targetWidth;
sampleSize = (int) Math.pow(2d,
Math.floor(Math.log(sampleSize) / Math.log(2d)));
}
// Do the actual decoding
options.inJustDecodeBounds = false;
options.inTempStorage = new byte[128];
while (true) {
try {
options.inSampleSize = (int) sampleSize;
bitMapImage = BitmapFactory.decodeFile(filePath, options);
break;
} catch (Exception ex) {
try {
sampleSize = sampleSize * 2;
} catch (Exception ex1) {
}
}
}
return bitMapImage;
}
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