RenderScript是Android在API 11之后加入的,用于高效的图片处理,包括模糊、混合、矩阵卷积计算等,原图:
App中效果图:
代码示例如下
- public Bitmap blurBitmap(Bitmap bitmap){
- //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(), Config.ARGB_8888);
- //Instantiate a new Renderscript
- RenderScript rs = RenderScript.create(getApplicationContext());
- //Create an Intrinsic Blur Script using the Renderscript
- ScriptIntrinsicBlur blurScript = ScriptIntrinsicBlur.create(rs, Element.U8_4(rs));
- //Create the Allocations (in/out) with the Renderscript and the in/out bitmaps
- Allocation allIn = Allocation.createFromBitmap(rs, bitmap);
- Allocation allOut = Allocation.createFromBitmap(rs, outBitmap);
- //Set the radius of the blur
- blurScript.setRadius(25.f);
- //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;
- }
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