RenderScriptUtil

RenderScriptUtil.java

public class RenderScriptUtil {

    private static final float DEFAULT_BLUR_RADIUS = 25f;

    private RenderScriptUtil() {
    }

    public static BitmapDrawable blurImage(Context context, int resource) {
        return blurImage(context, resource, DEFAULT_BLUR_RADIUS);
    }

    public static BitmapDrawable blurImage(Context context, int resource, float radius) {
        final BitmapFactory.Options options = new BitmapFactory.Options();
        options.inPreferredConfig = Bitmap.Config.ARGB_8888;
        Bitmap inputBitmap = BitmapFactory.decodeResource(context.getResources(), resource, options);
        Bitmap outputBitmap = Bitmap.createBitmap(inputBitmap.getWidth(), inputBitmap.getHeight(), inputBitmap.getConfig());

        RenderScript rs = RenderScript.create(context);
        ScriptIntrinsicBlur theIntrinsic = ScriptIntrinsicBlur.create(rs, Element.U8_4(rs));
        Allocation tmpIn = Allocation.createFromBitmap(rs, inputBitmap);
        Allocation tmpOut = Allocation.createFromBitmap(rs, outputBitmap);
        theIntrinsic.setRadius(radius);
        theIntrinsic.setInput(tmpIn);
        theIntrinsic.forEach(tmpOut);
        tmpOut.copyTo(outputBitmap);
        inputBitmap.recycle();

        return new BitmapDrawable(context.getResources(), outputBitmap);
    }
}