只是用于自己记录，方便以后查阅，就直接上代码了
/**Activity 套Fragment*/
inline fun <reified T : Fragment> AppCompatActivity.addFragment(@IdRes containerViewId: Int) {
supportFragmentManager.beginTransaction().add(containerViewId,
newInstanceFragment<T>()).commit()
}
/**Activity 套Fragment*/
inline fun <reified T : Fragment> AppCompatActivity.replaceFragment(@IdRes containerViewId: Int) {
supportFragmentManager.beginTransaction().replace(containerViewId,
newInstanceFragment<T>()).commit()
}
