利用Android原生RenderScript实现仿网易云、QQ音乐播放界面效果

概述国际惯例先上图：QQ音乐效果图：Demo效果图：高斯模糊工具类：/***<pre>*author:Hansel*e-mail:oysqloveyou@163.com*desc:毛玻璃工具类*version:1.0*</pre>*/publicclassBlurUtil{/***获取高斯模糊Drawable

国际惯例先上图：
QQ音乐效果图：

Demo效果图：

高斯模糊工具类：

/** * <pre> *     author : Hansel *     e-mail : oysqloveyou@163.com *     desc   : 毛玻璃工具类 *     version: 1.0 * </pre> */public class BlurUtil {    /**     * 获取高斯模糊Drawable     *     * @param bitmap   bitmap     * @param scale    缩放比例     * @param radius   缩放半径     * @param mContext mContext     * @return Single<Drawable>     */    public static Single<Drawable> getForegroundDrawable(Bitmap bitmap, int scale, int radius, Context mContext) {        return Single.create((Single.OnSubscribe<Drawable>) ex -> {            /*得到屏幕的宽高比，以便按比例切割图片一部分*/            final float wIDthHeightSize = (float) (ScreenUtils.getScreenWIDth(mContext)                    * 1.0 / ScreenUtils.getScreenHeight(mContext) * 1.0);            int cropBitmapWIDth;            if (wIDthHeightSize <= 1) {                cropBitmapWIDth = (int) (wIDthHeightSize * bitmap.getHeight());            } else {                cropBitmapWIDth = (int) (bitmap.getHeight() / wIDthHeightSize);            }            int cropBitmapWIDthX = (int) ((bitmap.getWIDth() - cropBitmapWIDth) / 2.0);            /*切割部分图片*/            Bitmap cropBitmap = Bitmap.createBitmap(bitmap, cropBitmapWIDthX, 0, cropBitmapWIDth,                    bitmap.getHeight());            /*缩小图片*/            Bitmap scaleBitmap = Bitmap.createScaledBitmap(cropBitmap, bitmap.getWIDth() / scale, bitmap                    .getHeight() / scale, false);            /*模糊化*/            final Bitmap blurBitmap = blurBitmap(scaleBitmap, radius, mContext);            final Drawable foregroundDrawable = new BitmapDrawable(null, blurBitmap);            /*加入灰色遮罩层，避免图片过亮影响其他控件*/            foregroundDrawable.setcolorFilter(color.GRAY, PorterDuff.Mode.MulTIPLY);            ex.onSuccess(foregroundDrawable);        })                .compose(RxUtil.ioHelper());    }    /**     * 高斯模糊     *     * @param bitmap  bitmap     * @param radius  radius range 0 < radius <= 25     * @param context context     * @return Bitmap     */    private static Bitmap blurBitmap(Bitmap bitmap, float radius, Context context) {        //Let's create an empty bitmap with the same size of the bitmap we want to blur        Bitmap outBitmap = Bitmap.createBitmap(bitmap.getWIDth(), bitmap.getHeight(),                Bitmap.Config.ARGB_8888);        //Instantiate a new Renderscript        androID.renderscript.RenderScript rs = androID.renderscript.RenderScript.create(context);        //Create an Intrinsic Blur Script using the Renderscript        androID.renderscript.ScriptIntrinsicBlur blurScript = androID.renderscript.ScriptIntrinsicBlur.create(rs, Element.U8_4(rs));        //Create the Allocations (in/out) with the Renderscript and the in/out bitmaps        androID.renderscript.Allocation allin = androID.renderscript.Allocation.createFromBitmap(rs, bitmap);        androID.renderscript.Allocation allOut = androID.renderscript.Allocation.createFromBitmap(rs, outBitmap);        //Set the radius of the blur        blurScript.seTradius(radius);        //Perform the Renderscript        blurScript.setinput(allin);        blurScript.forEach(allOut);        //copy the final bitmap created by the out Allocation to the outBitmap        allOut.copyTo(outBitmap);        //recycle the original bitmap        //        bitmap.recycle();        //After finishing everything, we destroy the Renderscript.        rs.destroy();        return outBitmap;    }}备注：Single是RxAndroID类，ScreenUtils.getScreenWIDth是自己写的获取屏幕宽度类，自己写很简单~，注释应该很详细了，高斯模糊so easy~!.

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