Android. Obtaining image size from it's resource id

Question

This is a part of my Activity:

private ImageView mImageView;
private int resource;

@Override
protected void onCreate(Bundle savedInstanceState) {
  super.on         


        

Answer 1

For anyone that didn't read dmon's comment. The code to do this looks like this:

final Options opt = new BitmapFactory.Options();
opt.inJustDecodeBounds = true;
BitmapFactory.decodeResource(getResources(), R.drawable.your_photo, opt);

opt.outHeight; // height of resource
opt.outWidth; // width of resource

Answer 2

Use BitmapFactory.decodeResource to obtain a Bitmap object of the resource, and then from the bitmap you can easily retrieve the image width/height with getHeight and getWidth

Also do not forget to recycle your bitmap

EDIT:

This way you will get a null bitmap as output, but the BitmapFactory.Options will be set with the with and height for the bitmap. So, in this case,, you do not need to recycle the bitmap

BitmapFactory.Options dimensions = new BitmapFactory.Options(); 
dimensions.inJustDecodeBounds = true;
Bitmap mBitmap = BitmapFactory.decodeResource(getResources(), R.drawable.bitmap, dimensions);
int height = dimensions.outHeight;
int width =  dimensions.outWidth;