content: package org.amahi.anywhere.util;
  
  import android.content.Context;
  import android.graphics.Bitmap;
  import android.renderscript.Allocation;
  import android.renderscript.Element;
  import android.renderscript.RenderScript;
  import android.renderscript.ScriptIntrinsicBlur;
  
  public class BlurBuilder {
      private static final float BITMAP_SCALE = 0.2f;
      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;
      }
  }
  