Regularly, you can just write BitmapFactory.decodeBitmap(....) etc, but the file can be huge and you can get the OutOfMemoryError in no time, especially, if you do decoding a few times in the row. So you need to compress the image before setting it to view, so you won't run out of memory. Here is the proper way to do it.
File f = new File(path);
if(file.exists()){
Bitmap myBitmap = ImageHelper.getCompressedBitmap(photoView.getMaxWidth(), photoView.getMaxHeight(), f);
photoView.setImageBitmap(myBitmap);
}
//////////////
/**
* Compresses the file to make a bitmap of size, passed in arguments
* @param width width you want your bitmap to have
* @param height hight you want your bitmap to have.
* @param f file with image
* @return bitmap object of sizes, passed in arguments
*/
public static Bitmap getCompressedBitmap(int width, int height, File f) {
BitmapFactory.Options options = new BitmapFactory.Options();
options.inJustDecodeBounds = true;
BitmapFactory.decodeFile(f.getAbsolutePath(), options);
options.inSampleSize = calculateInSampleSize(options, width, height);
options.inJustDecodeBounds = false;
return BitmapFactory.decodeFile(f.getAbsolutePath(), options);
}
/////////////////
public static int calculateInSampleSize(BitmapFactory.Options options, int reqWidth, int reqHeight) {
// Raw height and width of image
final int height = options.outHeight;
final int width = options.outWidth;
int inSampleSize = 1;
if (height > reqHeight || width > reqWidth) {
final int halfHeight = height / 2;
final int halfWidth = width / 2;
// Calculate the largest inSampleSize value that is a power of 2 and keeps both
// height and width larger than the requested height and width.
while ((halfHeight / inSampleSize) >= reqHeight
&& (halfWidth / inSampleSize) >= reqWidth) {
inSampleSize *= 2;
}
}
return inSampleSize;
}
