Нехватка памяти bitmap size exceeds VM budget

ArrayList<BitmapDrawable> DrawList;
DrawList = new ArrayList<BitmapDrawable>();
 
        LinearLayout L = (LinearLayout)findViewById(R.id.startlayout);
        DrawList.add(decodeSampledBitmapFromResource(getResources(),R.drawable.a,getResources().getDisplayMetrics().widthPixels,getResources().getDisplayMetrics().heightPixels));
L.setBackgroundDrawable(DrawList.get(0));
Вот код метода.
public static BitmapDrawable decodeSampledBitmapFromResource(Resources res,int id,int reqWidth, int reqHeight)
    {
 
        // First decode with inJustDecodeBounds=true to check dimensions
        final BitmapFactory.Options options = new BitmapFactory.Options();
        options.inJustDecodeBounds = true;
        BitmapFactory.decodeResource(res, id, options);
        final int height = options.outHeight;
        final int width = options.outWidth;
 
        // Calculate inSampleSize
        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;
            }
        }
        options.inSampleSize = inSampleSize;
 
        // Decode bitmap with inSampleSize set
        options.inJustDecodeBounds = false;
        return new BitmapDrawable(res,BitmapFactory.decodeResource(res, id, options));
    }

@Override
    public void onBackPressed() {
        intent = new Intent(this,Satrt_activity.class);
        intent.putExtra("kolx",kolx);
        intent.putExtra("koly",koly);
        intent.putExtra("mode",mode);
        startActivity(intent);
        return;
    }

DrawList.get(0).getBitmap().recycle();
       DrawList.clear();