我有一个加载位图，我想转换设置配置为 Bitmap.Config.RGB_565 。是否有转换位图的位图后，这个配置已经加载到内存中的一个简单的方法？例如，下面我有一个位图之中去$ C $从应用程序的资源光盘，但是，我将如何转换已加载的位图到 RGB_565 ？我敢肯定，这是简单的东西，不过，我是相当新的使用位图和几个小时在网上找工作后，不幸的是我没有找到我所需要的具体。

  BitmapFactory.Options选项=新BitmapFactory.Options（）;
options.in preferredConfig = Bitmap.Config.RGB_565
位= BitmapFactory.de codeResource（getResources（），R.drawable.myphoto，期权）;
 

解决方案

我没有测试过这一点，但它应该工作：

 私人位图转换（位图位图，Bitmap.Config配置）{
    位图convertedBitmap = Bitmap.createBitmap（bitmap.getWidth（），bitmap.getHeight（），配置）;
    帆布油画=新的Canvas（convertedBitmap）;
    涂料粉刷=新的油漆（）;
    paint.setColor（Color.BLACK）;
    canvas.drawBitmap（位图，0，0，油漆）;
    返回convertedBitmap;
}
 

这样调用方法：

 位图convertedBitmap =转换（位图，Bitmap.Config.RGB_565）;
 

您可以做各种额外的转换像旋转，伸展等，如果你使用的drawBitmap一个矩阵。

I have a loaded Bitmap which I would like to convert to set the config to Bitmap.Config.RGB_565. Is there a simple way of converting a Bitmap to this configuration after the Bitmap is already loaded into memory? For example, below I have a bitmap being decoded from the application resources, however, how would I convert an already loaded Bitmap to RGB_565? I'm sure it's something simple, however, I'm fairly new to working with Bitmaps and after a few hours of looking online, unfortunately I couldn't find what I needed specifically.

BitmapFactory.Options options = new BitmapFactory.Options();
options.inPreferredConfig=Bitmap.Config.RGB_565
bitmap=BitmapFactory.decodeResource(getResources(), R.drawable.myphoto ,options);

I haven't tested this but it should work:

private Bitmap convert(Bitmap bitmap, Bitmap.Config config) {
    Bitmap convertedBitmap = Bitmap.createBitmap(bitmap.getWidth(), bitmap.getHeight(), config);
    Canvas canvas = new Canvas(convertedBitmap);
    Paint paint = new Paint();
    paint.setColor(Color.BLACK);
    canvas.drawBitmap(bitmap, 0, 0, paint);
    return convertedBitmap;
}

call the methods like this:

Bitmap convertedBitmap = convert(bitmap, Bitmap.Config.RGB_565);

You can do all kinds of additional transformations like rotating, stretching etc. if you use the drawBitmap with a Matrix.