Question

I am building an android where. Inside of one activity I have an image button. When I click on it the gallery opens up and I can choose an image. Then I set that image as the new image for the image button.
The problem is the image appears way too big inside my activity. How can I make it fit into my image button?

protected void onActivityResult(int requestCode, int resultCode, Intent imageReturnedIntent) { 
    super.onActivityResult(requestCode, resultCode, imageReturnedIntent); 

    switch(requestCode) { 
    case SELECT_PHOTO:
        if(resultCode == RESULT_OK){  
            Uri selectedImage = imageReturnedIntent.getData();
            String[] filePathColumn = {MediaStore.Images.Media.DATA};

            Cursor cursor = getContentResolver().query(selectedImage, filePathColumn, null, null, null);
            cursor.moveToFirst();

            int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
            String filePath = cursor.getString(columnIndex);
            cursor.close();


            Bitmap yourSelectedImage = BitmapFactory.decodeFile(filePath);

            mImageButton.setImageBitmap(yourSelectedImage);
        }
    }
}

Answer 1

You can use this method to get a resized image. This way you can avoid OutOfMemoryError

public static Bitmap decodeUri(Context c, Uri uri, final int requiredSize) 
            throws FileNotFoundException {
        BitmapFactory.Options o = new BitmapFactory.Options();
        o.inJustDecodeBounds = true;
        BitmapFactory.decodeStream(c.getContentResolver().openInputStream(uri), null, o);

        int width_tmp = o.outWidth
                , height_tmp = o.outHeight;
        int scale = 1;

        while(true) {
            if(width_tmp / 2 < requiredSize || height_tmp / 2 < requiredSize)
                break;
            width_tmp /= 2;
            height_tmp /= 2;
            scale *= 2;
        }

        BitmapFactory.Options o2 = new BitmapFactory.Options();
        o2.inSampleSize = scale;
        return BitmapFactory.decodeStream(c.getContentResolver().openInputStream(uri), null, o2);
    }   

---

requiredSize means either one of height or width. Based on this code:

if(width_tmp / 2 < requiredSize || height_tmp / 2 < requiredSize)

That means, if photo is landscape, 1000×800, and you put required size as 500, then the resulting image will be 500×400. And if the photo is portrait, 800×1000, and requiredSize specified as 500, the resulting image then will be 400×500.