MDTintHelper.java 文件源码

public static void setTint(RadioButton radioButton, ColorStateList colors) {
  if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP_MR1) {
    radioButton.setButtonTintList(colors);
  } else {
    Drawable radioDrawable =
        ContextCompat.getDrawable(radioButton.getContext(), R.drawable.abc_btn_radio_material);
    Drawable d = DrawableCompat.wrap(radioDrawable);
    DrawableCompat.setTintList(d, colors);
    radioButton.setButtonDrawable(d);
  }
}