Created by: yeyupiaoling

在AndroidDemo中，下面的方法是不是通道的转换呢？是不是转成BGR呢？

    public float[] getScaledMatrix(Bitmap bitmap, int desWidth,
                                   int desHeight) {
        float[] dataBuf = new float[3 * desWidth * desHeight];
        int rIndex;
        int gIndex;
        int bIndex;
        int[] pixels = new int[desWidth * desHeight];
        Bitmap bm = Bitmap.createScaledBitmap(bitmap, desWidth, desHeight, false);
        bm.getPixels(pixels, 0, desWidth, 0, 0, desWidth, desHeight);
        int j = 0;
        int k = 0;
        Log.d("pixels", Arrays.toString(pixels));
        for (int i = 0; i < pixels.length; i++) {
            int clr = pixels[i];
            j = i / desHeight;
            k = i % desWidth;
            rIndex = j * desWidth + k;
            gIndex = rIndex + desHeight * desWidth;
            bIndex = gIndex + desHeight * desWidth;
            dataBuf[rIndex] = (float) ((clr & 0x00ff0000) >> 16) - 148;
            dataBuf[gIndex] = (float) ((clr & 0x0000ff00) >> 8) - 148;
            dataBuf[bIndex] = (float) ((clr & 0x000000ff)) - 148;

        }
        if (bm.isRecycled()) {
            bm.recycle();
        }
        return dataBuf;


    }

我觉得Android的Demo代码还是要放出来的，方便我们提问题的时候引用