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android {

    defaultConfig {

        renderscriptTargetApi   19

        renderscriptSupportModeEnabled   true

    }

}

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public class BlurBuilder   {

    private static final float BITMAP_SCALE = 0.4f;

    private static final float BLUR_RADIUS = 7.5f;

    public static Bitmap blur(Context context, Bitmap image) {

        int width = Math.round(image.getWidth() *   BITMAP_SCALE);

        int height = Math.round(image.getHeight() *   BITMAP_SCALE);

        Bitmap   inputBitmap = Bitmap.createScaledBitmap(image, width, height, false);

        Bitmap   outputBitmap = Bitmap.createBitmap(inputBitmap);

        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(BLUR_RADIUS);

        theIntrinsic.setInput(tmpIn);

        theIntrinsic.forEach(tmpOut);

        tmpOut.copyTo(outputBitmap);

        return outputBitmap;

    }

}

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Bitmap blurredBitmap = BlurBuilder.blur(   getActivity(), originalBitmap );

view.setBackgroundDrawable( new BitmapDrawable( getResources(), blurredBitmap   ) );