一.Navigation是什么？
Navi是jetPack的Ui组件，它使用于单个Activity多个Fragment，可以结合底部和顶部以及侧边导航栏，管理起来更加灵活，而且它也支持DeepLink。
二.Navigation怎么用?
1.Navigation三大元素
1.Fragment容器：NaviHostFragment
2.Fragment导航图：navi_gragh
3.Fragment跳转：NaviController
2.跳转实列
override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
super.onViewCreated(view, savedInstanceState)
view.findViewById<TextView>(R.id.tv2)
.setOnClickListener {
findNavController().navigate(R.id.action_fragmentB2_to_fragmentC22) //根据naviGraph跳转
}
view.findViewById<TextView>(R.id.tv4).setOnClickListener {
findNavController().navigateUp() //类似于返回键
}
}
3.参数传递
view.findViewById<TextView>(R.id.tv1)
.setOnClickListener {
findNavController().navigate(R.id.action_fragmentA2_to_fragmentB22,
Bundle().apply {
putString("param1", "FragmentA") //传递参数
}
)
}
4.安全参数传递
5.结合BottomNavigationView、Appbar、ToolBar使用
val navHostFragment: Fragment =
supportFragmentManager.findFragmentById(R.id.nav_host_fragment) as NavHostFragment
//找到Controller
val navController = navHostFragment.findNavController()
//底部导航栏
val bottomNavigationView: BottomNavigationView = findViewById(R.id.nav_bottom)
//绑定底部导航栏和Navigation
NavigationUI.setupWithNavController(bottomNavigationView,navController)
<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto">
<item
android:id="@+id/fragmentA2"
android:title="Item1" />
<item
android:id="@+id/fragmentB2"
android:title="Item2" />
<item
android:id="@+id/fragmentC2"
android:title="Item3" />
</menu>
6.DeepLink的配置
1.在navigrah中配置Fragment的deepLink
<fragment
android:id="@+id/fragmentB2"
android:name="com.seven.nav.FragmentB"
android:label="fragment_b"
tools:layout="@layout/fragment_b">
<action
android:id="@+id/action_fragmentB2_to_fragmentC22"
app:destination="@id/fragmentC2" />
<action
android:id="@+id/action_fragmentB2_to_fragmentA2"
app:popUpTo="@id/fragmentA2" />
<deepLink
android:id="@+id/deepLink"
app:action="ACTION_BAIDU"
app:mimeType="test/fragment"
app:uri="www.baidu.com" />
</fragment>
2.指令测试
adb shell am start -W -a ACTION_BAIDU -d "www.baidu.com/test/fragment" com.seven.nav/.MainActivity
