加载fragment

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/**
 * 加载fragment
 */
fun FragmentActivity.loadFragment(id: Int, from: Fragment?, to: Fragment?) {
    supportFragmentManager.let { manager ->
        manager.beginTransaction().run {
            if (from != to) {
                val fromFragment = manager.findFragmentByTag(from?.javaClass?.simpleName)
                fromFragment?.let { hide(it) }
                val toFragment = manager.findFragmentByTag(to?.javaClass?.simpleName)
                if (toFragment == null || !toFragment.isAdded) {
                    to?.let { add(id, it, it.javaClass.simpleName).commit() }
                } else {
                    toFragment.let { show(it).commit() }
                }
            }
        }
    }
}

/**
 * 移除fragment
 */
fun FragmentActivity.removeFragment(fragment: Fragment) {
    supportFragmentManager
        .beginTransaction()
        .remove(fragment)
        .commit()
}