OutOfMemoryError with image selection in Android. How to resize image before decoding it to bitmap?

Question

I\'m building an imagepicker in my Android app, for which I used the example code on this page. This basically gives me a button which opens the possibility to get a file fr

Answer 1

Basically, you should use BitmapFactory.decodeFile(path, options) passing Bitmap.Options.inSampleSize to decode a subsampled version of the original Bitmap.

Your code will look something like this:

public Bitmap decodeBitmap(String path, int maxWidth, int maxHeight) {
    BitmapFactory.Options options = new BitmapFactory.Options();
    options.inJustDecodeBounds = true;
    BitmapFactory.decodeFile(path, options);
    options.inJustDecodeBounds = false;
    options.inSampleSize = calculateInSampleSize(maxWidth, maxHeight, options.outWidth, options.outHeight);
    return BitmapFactory.decodeFile(path, options);
}

And the calculateInSampleSize code:

private int calculateInSampleSize(int maxWidth, int maxHeight, int width, int height) {
    double widthRatio = (double) width / maxWidth;
    double heightRatio = (double) height / maxHeight;
    double ratio = Math.min(widthRatio, heightRatio);
    float n = 1.0f;
        while ((n * 2) <= ratio) {
            n *= 2;
        }
        return (int) n;
    }