/**
	 * 模糊图片
	 * @param bitmap 原图片
	 * @param radius 模糊度  0~25
	 * @param context
	 * @return 模糊后的图片
	 */
	public static Bitmap blurBitmap(Bitmap bitmap, float radius, Context context) {
    //Create renderscript
    RenderScript rs = RenderScript.create(context);
 
    //Create allocation from Bitmap
    Allocation allocation = Allocation.createFromBitmap(rs, bitmap);
    
    Type t = allocation.getType();
 
    //Create allocation with the same type
    Allocation blurredAllocation = Allocation.createTyped(rs, t);
 
    //Create script
    ScriptIntrinsicBlur blurScript = ScriptIntrinsicBlur.create(rs, Element.U8_4(rs));
    //Set blur radius (maximum 25.0)
    blurScript.setRadius(radius);
    //Set input for script
    blurScript.setInput(allocation);
    //Call script for output allocation
    blurScript.forEach(blurredAllocation);
 
    //Copy script result into bitmap
    blurredAllocation.copyTo(bitmap);
 
    //Destroy everything to free memory
    allocation.destroy();
    blurredAllocation.destroy();
    blurScript.destroy();
    t.destroy();
    rs.destroy();
    return bitmap;
}

LevelListDrawable pauseDrawable = (LevelListDrawable) yourwiget
				.getBackground();
pauseDrawable.setLevel(1);//根据业务需要,对应图片等级

static List<Integer> intArrayAsList(final int[] a){
    if(a == null)
        throw new NullPointerException();

    retrun new AbstractList<Integer>() {
        public Interger get(int i) {
            retrun a[i];
        }
        @Override public Integer set(int i, Integer val){
            int oldVal = a[i];
            a[i] = val;
            retrun oldVal;
        }

        public int size(){ retrun a.length;}
    };
}