Nav Graph 范围的 ViewModel 函数未解析

Question

我正在尝试将 ViewModel 的范围限定为导航图，但无法让 NavController.getViewModelStoreOwner(id) 或委托 by navGraphViewModels(id) 解析。我一定是遗漏了一个依赖项，但一直找不到正确的依赖项。

build.gradle:

dependencies {
    implementation fileTree(dir: "libs", include: ["*.jar"])
    implementation "org.jetbrains.kotlin:kotlin-stdlib:$kotlin_version"
    implementation 'androidx.core:core-ktx:1.3.0'
    implementation 'androidx.appcompat:appcompat:1.1.0'
    implementation 'androidx.fragment:fragment:1.2.5'
    implementation 'androidx.fragment:fragment-ktx:1.2.5'
    implementation 'androidx.lifecycle:lifecycle-livedata-ktx:2.2.0'
    implementation 'androidx.lifecycle:lifecycle-runtime-ktx:2.2.0'
    implementation 'androidx.lifecycle:lifecycle-viewmodel:2.2.0'
    implementation 'androidx.lifecycle:lifecycle-extensions:2.2.0'
    implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
    implementation 'com.google.firebase:firebase-analytics:17.4.3'
    implementation 'com.google.firebase:firebase-crashlytics:17.0.1'
    implementation 'com.google.firebase:firebase-perf:19.0.7'
    implementation 'com.google.firebase:firebase-messaging:20.2.0'
    implementation 'com.jakewharton.timber:timber:4.7.1'
    implementation 'androidx.legacy:legacy-support-v4:1.0.0'
    implementation 'android.arch.navigation:navigation-runtime:2.2.0'
    implementation 'android.arch.navigation:navigation-fragment:2.2.0'
    implementation 'android.arch.navigation:navigation-ui:2.2.0'
    implementation 'android.arch.navigation:navigation-runtime-ktx:2.2.0'
    implementation 'android.arch.navigation:navigation-fragment-ktx:2.2.0'
    implementation 'android.arch.navigation:navigation-ui-ktx:2.2.0'

    testImplementation 'junit:junit:4.13'
    androidTestImplementation 'androidx.test.ext:junit:1.1.1'
    androidTestImplementation 'androidx.test.espresso:espresso-core:3.2.0'

}

MainActivity.kt

package com.cren90.sandbox

import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import androidx.navigation.findNavController

class MainActivity : AppCompatActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)

        val navController = findNavController(R.id.nav_host_fragment)
        navController.getViewModelStoreOwner(R.id.nav_graph) // getViewModelStoreOwner is not resolving
    }
}

Answer 1

您所有的导航依赖项都在使用 android.arch.navigation，这意味着您只能获得 1.0.0 版本的 AndroidX 之前的导航。

如果您想使用 AndroidX 版本，它们需要 androidx.navigation。

// This includes navigation-fragment and navigation-runtime-ktx already
implementation 'androidx.navigation:navigation-fragment-ktx:2.2.0'
// This includes navigation-ui already
implementation 'androidx.navigation:navigation-ui-ktx:2.2.0'

Nav Graph 范围的 ViewModel 函数未解析

Nav Graph scoped ViewModel functions not resolving

android

kotlin

android-jetpack

android-jetpack-navigation