Preferences.java 文件源码

@Override
public void onAttachedToWindow() {
    super.onAttachedToWindow();
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
        Fragment fragment = getFragmentManager().findFragmentById(android.R.id.content);
        if (fragment instanceof PreferenceFragment && fragment.getView() != null) {
            // Set list view padding to 0 so dividers are the full width of the screen.
            fragment.getView().findViewById(android.R.id.list).setPadding(0, 0, 0, 0);
        }
    }
}