【Jetpack】Android Navigation DeepLink 與參數傳遞 (三) 範例

Android Jetpack Navigation 是一個統一的導航框架，可以讓開發者更容易地將 Android 皆常用的導航功能（如功能表、堆疊、抽屜和底部導航等）添加到應用中。

它為多個導航目的地提供一致的 API，並可以讓開發者將導航行為通用於單個或多個活動。

文章目錄

1. Navigation DeepLink 配置
2. Navigation DeepLink Args 取值
3. Navigation DeepLink Bundle 取值
4. Navigation Fragment 傳遞參數 Args 取值
5. Navigation Fragment 傳遞參數 Bundle 取值
6. Developer Documents Navigation

1.Navigation DeepLink 配置

AndroidManifest.xml

<activity
    android:name=".MainActivity"
    android:exported="true"
    android:launchMode="singleInstance">

    <nav-graph android:value="@navigation/nav_graph" />

</activity>

nav_graph.xml

<?xml version="1.0" encoding="utf-8"?>
<navigation xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/nav_graph"
    app:startDestination="@id/AFragment">

    <fragment
        android:id="@+id/AFragment"
        android:name="com.example.jetpackdemo.AFragment"
        android:label="AFragment"
        tools:layout="@layout/fragment_a">

        <argument
            android:defaultValue="init"
            android:name="key"
            app:argType="string" />

        <deepLink app:uri="app://fragment/{key}" />
    </fragment>
</navigation>

2.Navigation DeepLink Args 取值

AFragment.kt

class AFragment : Fragment(R.layout.fragment_a) {

    private val args: AFragmentArgs by navArgs()

    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
        super.onViewCreated(view, savedInstanceState)

        Log.e("key", args.key)
    }

}

3.Navigation DeepLink Bundle 取值

AFragment.kt

class AFragment : Fragment(R.layout.fragment_a) {

    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
        super.onViewCreated(view, savedInstanceState)

        val argument = arguments?.getString("key")
        Log.e("key", argument.toString())
    }

}

4.Navigation Fragment 傳遞參數 Args 取值

參數類型表

nav_graph.xml

<?xml version="1.0" encoding="utf-8"?>
<navigation xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/nav_graph"
    app:startDestination="@id/AFragment">

    <fragment
        android:id="@+id/AFragment"
        android:name="com.example.jetpackdemo.AFragment"
        android:label="AFragment"
        tools:layout="@layout/fragment_a">

        <action
            android:id="@+id/action_AFragment_to_BFragment"
            app:destination="@id/BFragment" />

    </fragment>

    <fragment
        android:id="@+id/BFragment"
        android:name="com.example.jetpackdemo.BFragment"
        android:label="BFragment"
        tools:layout="@layout/fragment_b">

        <argument
            android:name="number"
            android:defaultValue="1"
            app:argType="integer" />

    </fragment>
</navigation>

AFragment.kt

class AFragment : Fragment(R.layout.fragment_a) {

    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
        super.onViewCreated(view, savedInstanceState)

        val binding = FragmentABinding.bind(view)

        binding.next.setOnClickListener {
            val action = AFragmentDirections.actionAFragmentToBFragment(100)
            findNavController().navigate(action)
        }
    }

}

BFragment .kt

class BFragment : Fragment(R.layout.fragment_b) {

    private val safeArgs: BFragmentArgs by navArgs()

    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
        super.onViewCreated(view, savedInstanceState)

        Log.e("number", safeArgs.number.toString())
    }

}

5.Navigation Fragment 傳遞參數 Bundle 取值

nav_graph.xml

<?xml version="1.0" encoding="utf-8"?>
<navigation xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/nav_graph"
    app:startDestination="@id/AFragment">

    <fragment
        android:id="@+id/AFragment"
        android:name="com.example.jetpackdemo.AFragment"
        android:label="AFragment"
        tools:layout="@layout/fragment_a">

        <action
            android:id="@+id/action_AFragment_to_BFragment"
            app:destination="@id/BFragment" />

    </fragment>

    <fragment
        android:id="@+id/BFragment"
        android:name="com.example.jetpackdemo.BFragment"
        android:label="BFragment"
        tools:layout="@layout/fragment_b">

    </fragment>
</navigation>

AFragment.kt

class AFragment : Fragment(R.layout.fragment_a) {

    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
        super.onViewCreated(view, savedInstanceState)

        val binding = FragmentABinding.bind(view)

        binding.next.setOnClickListener {
            val bundle = bundleOf("number" to 100)
            findNavController().navigate(R.id.BFragment, bundle)
        }
    }

}

BFragment.kt

class BFragment : Fragment(R.layout.fragment_b) {


    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
        super.onViewCreated(view, savedInstanceState)

        val number = arguments?.getInt("number")
        Log.e("number", number.toString())
    }

}

6.Developer Documents Navigation

Open in Documents Navigation