Bitmap和Drawable的互相转换

   刚好之前的项目有用到，怕遗忘了，就先记录下来，然后会用到的时候直接来这copy使用就好了。

 1.Bitmap ---->Drawable:

public static Drawable bitmapToDrawable(Bitmap bitmap) {
BitmapDrawable bd = new BitmapDrawable(bitmap);
return bd;
}

2.Drawable---->Bitmap:
public static Bitmap drawableToBitmap(Drawable drawable) {
// 取 drawable 的长宽
int w = drawable.getIntrinsicWidth();
int h = drawable.getIntrinsicHeight();

// 取 drawable 的颜色格式
Bitmap.Config config = drawable.getOpacity() != PixelFormat.OPAQUE ? Bitmap.Config.ARGB_8888
: Bitmap.Config.RGB_565;

Bitmap bitmap = Bitmap.createBitmap(w, h, config);
Canvas canvas = new Canvas(bitmap);
drawable.setBounds(0, 0, w, h);
drawable.draw(canvas);
return bitmap;
}

That is Over！