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Android下高斯模糊的算法和demo

采用纯java和RenderScript两种方式来做高斯算法。

也可以用NDK来做,想试试的可以参考:

http://stackoverflow.com/questions/2067955/fast-bitmap-blur-for-android-sdk/23119957#23119957

 

 

     c                           device-2014-07-07-165759

 

 

 

纯java的代码有点长,可直接参考源代码

 

放上RenderScript的核心算法 :

/**     * 第二种方法的延伸     *      * @param bm     * @param view     * @return void     * @author Doraemon     * @time 2014年7月7日下午4:56:53     */    private void rsBlur2(Bitmap bm, ImageView view) {        Bitmap outputBitmap = Bitmap.createBitmap((int) (view.getMeasuredWidth() / 1), (int) (view.getMeasuredHeight() / 1),                Bitmap.Config.ARGB_8888);        RenderScript rs = RenderScript.create(getApplicationContext());        ScriptIntrinsicBlur theIntrinsic = ScriptIntrinsicBlur.create(rs, Element.U8_4(rs));        Allocation tmpIn = Allocation.createFromBitmap(rs, bm);        Allocation tmpOut = Allocation.createFromBitmap(rs, outputBitmap);        theIntrinsic.setRadius(25.f);        theIntrinsic.setInput(tmpIn);        theIntrinsic.forEach(tmpOut);        tmpOut.copyTo(outputBitmap);        bm.recycle();        view.setImageDrawable(new BitmapDrawable(getResources(), outputBitmap));        rs.destroy();    }

 

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