使用 androidx.navigation:navigation 指南
最外层项目 build.gradle.kts 添加
plugins {id("com.android.application") version "8.1.1" apply falseid("org.jetbrains.kotlin.android") version "1.9.0" apply false//id ("androidx.navigation.safeargs") version "2.5.0" apply false
}
app 对应的 build.gradle.kts 添加
plugins {id("com.android.application")id("org.jetbrains.kotlin.android")id("kotlin-kapt")//id("androidx.navigation.safeargs")
}dependencies {....// Navigation library//implementation ("androidx.navigation:navigation-fragment-ktx:2.7.7")//implementation ("androidx.navigation:navigation-ui-ktx:2.7.7")....}
res/layout/activity_main.xml
<androidx.fragment.app.FragmentContainerViewxmlns:android="http://schemas.android.com/apk/res/android"xmlns:tools="http://schemas.android.com/tools"xmlns:app="http://schemas.android.com/apk/res-auto"android:id="@+id/fragment_container"android:name="androidx.navigation.fragment.NavHostFragment"android:layout_width="match_parent"android:layout_height="match_parent"android:keepScreenOn="true"app:defaultNavHost="true"app:navGraph="@navigation/nav_graph"tools:context=".MainActivity"/>
res/navigation/nav_graph.xml
<?xml version="1.0" encoding="utf-8"?>
<!--~ Copyright 2020 The Android Open Source Project~~ Licensed under the Apache License, Version 2.0 (the "License");~ you may not use this file except in compliance with the License.~ You may obtain a copy of the License at~~ https://www.apache.org/licenses/LICENSE-2.0~~ Unless required by applicable law or agreed to in writing, software~ distributed under the License is distributed on an "AS IS" BASIS,~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.~ See the License for the specific language governing permissions and~ limitations under the License.-->
<navigationxmlns:android="http://schemas.android.com/apk/res/android"xmlns:app="http://schemas.android.com/apk/res-auto"android:id="@+id/nav_graph"app:startDestination="@id/permissions_fragment"><fragmentandroid:id="@+id/permissions_fragment"android:name="com.android.example.cameraxbasic.fragments.PermissionsFragment"android:label="PermissionsFragment" ><actionandroid:id="@+id/action_permissions_to_camera"app:destination="@id/camera_fragment"app:popUpTo="@id/permissions_fragment"app:popUpToInclusive="true" /></fragment><fragmentandroid:id="@+id/camera_fragment"android:name="com.android.example.cameraxbasic.fragments.CameraFragment"android:label="CameraFragment" ><actionandroid:id="@+id/action_camera_to_gallery"app:destination="@id/gallery_fragment" /><actionandroid:id="@+id/action_camera_to_permissions"app:destination="@id/permissions_fragment"app:popUpTo="@id/camera_fragment"app:popUpToInclusive="true"/></fragment><fragmentandroid:id="@+id/gallery_fragment"android:name="com.android.example.cameraxbasic.fragments.GalleryFragment"android:label="GalleryFragment" ><argumentandroid:name="root_directory"app:argType="string" /></fragment></navigation>
使用：
import androidx.navigation.Navigationprivate fun navigateToCamera() {lifecycleScope.launchWhenStarted {Navigation.findNavController(requireActivity(), R.id.fragment_container).navigate(PermissionsFragmentDirections.actionPermissionsToCamera())}}
