Android NV21与Bitmap相互转换 可实时添加水印

获取相机回调数据

        @Override
        public void onPreviewFrame(byte[] data, Camera camera) {
   
			//这里的data便是原始视频数据
		}

将视频数据转化为bitmap

    public Bitmap nv21ToBitmap(byte[] nv21, int width, int height){
   
        if (yuvType == null){
   
            yuvType = new Type.Builder(renderScript, Element.U8(renderScript)).setX(nv21.length);
            in = Allocation.createTyped(renderScript, yuvType.create(), Allocation.USAGE_SCRIPT);
            rgbaType = new Type.Builder(renderScript, Element.RGBA_8888(renderScript)).setX(width).setY(height);
            out = Allocation.createTyped(renderScript, rgbaType.create(), Allocation.USAGE_SCRIPT);
        }
        in.copyFrom(nv21);
        yuvToRgbIntrinsic.setInput(in);
        yuvToRgbIntrinsic.