Unresolved reference setupWithNavController

[YesayaSoftware]

[linucksrox]

Do you have this import statement? import androidx.navigation.ui.setupWithNavController

[YesayaSoftware]

I did @linucksrox, but it show like it is unused.

[linucksrox]

Can you post the entire MainActivity.kt file? Also did you add the proper kotlin extensions in the project's build.gradle file, and add the correct dependencies in the app build.gradle file? I just got everything working in my environment today by using the dependencies used here: https://github.com/ResoCoder/forecast-mvvm-android-kotlin/commit/f4434b47c2530e2e0fffaac9e0f1ecd36c6ff402

The exact versions are important too, it's not always safe to assume you should use newer dependency versions just because they are available.

[YesayaSoftware]

`package software.yesaya.weather.ui

import androidx.appcompat.app.AppCompatActivity import android.os.Bundle import androidx.navigation.NavController import androidx.navigation.Navigation import androidx.navigation.ui.NavigationUI import androidx.navigation.ui.setupWithNavController import kotlinx.android.synthetic.main.activity_main.* import software.yesaya.weather.R

class MainActivity : AppCompatActivity() {

private lateinit var navController: NavController

override fun onCreate(savedInstanceState: Bundle?) {
    super.onCreate(savedInstanceState)
    setContentView(R.layout.activity_main)
    setSupportActionBar(toolbar)

    navController = Navigation.findNavController(this, R.id.nav_host_fragment)

    bottom_nav.setupWithNavController(navController)

    NavigationUI.setupActionBarWithNavController(this, navController)
}

override fun onSupportNavigateUp(): Boolean {
    return NavigationUI.navigateUp(null, navController)
}

} `

[linucksrox]

I'm not sure.... I would double check in activity_main.xml that you have this at the bottom of your LinearLayout:

<com.google.android.material.bottomnavigation.BottomNavigationView
        android:id="@+id/bottom_nav"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        app:menu="@menu/bottom_nav" />

And that you created bottom_nav.xml for the menu:

<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android">
    <item
            android:id="@+id/currentWeatherFragment"
            android:icon="@drawable/ic_today"
            android:title="Today"/>
    <item
            android:id="@+id/futureListWeatherFragment"
            android:icon="@drawable/ic_calendar_week"
            android:title="7 Days"/>
    <item
            android:id="@+id/settingsFragment"
            android:icon="@drawable/ic_settings"
            android:title="Settings"/>
</menu>

And that you created a navigation resource called mobile_navigation:

<?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/mobile_navigation"
    app:startDestination="@id/currentWeatherFragment">

    <fragment
        android:id="@+id/currentWeatherFragment"
        android:name="software.yesaya.weather.ui.weather.current.CurrentWeatherFragment"
        android:label="current_weather_fragment"
        tools:layout="@layout/current_weather_fragment" />
    <fragment
        android:id="@+id/futureListWeatherFragment"
        android:name="software.yesaya.weather.ui.weather.future.list.FutureListWeatherFragment"
        android:label="future_list_weather_fragment"
        tools:layout="@layout/future_list_weather_fragment" />
    <fragment
        android:id="@+id/futureDetailWeatherFragment"
        android:name="software.yesaya.weather.ui.weather.future.detail.FutureDetailWeatherFragment"
        android:label="future_detail_weather_fragment"
        tools:layout="@layout/future_detail_weather_fragment" />
    <fragment
        android:id="@+id/settingsFragment"
        android:name="software.yesaya.weather.ui.settings.SettingsFragment"
        android:label="SettingsFragment" />
</navigation>

If you have all of that, double check project level build.gradle

// Top-level build file where you can add configuration options common to all sub-projects/modules.

buildscript {
    ext.kotlin_version = '1.3.10'
    ext.room_version = '2.1.0-alpha02'
    ext.navigation_version = '1.0.0-alpha07'
    ext.kodein_version = '5.2.0'
    ext.lifecycle_version = '2.0.0'
    ext.retrofit_version = '2.4.0'
    repositories {
        google()
        jcenter()

    }
    dependencies {
        classpath 'com.android.tools.build:gradle:3.4.0-alpha01'
        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
        classpath 'android.arch.navigation:navigation-safe-args-gradle-plugin:1.0.0-alpha07'
        // NOTE: Do not place your application dependencies here; they belong
        // in the individual module build.gradle files
    }
}

allprojects {
    repositories {
        google()
        jcenter()

    }
}

task clean(type: Delete) {
    delete rootProject.buildDir
}

And app build.gradle

apply plugin: 'com.android.application'

apply plugin: 'kotlin-android'

apply plugin: 'kotlin-android-extensions'

apply plugin: "kotlin-kapt"

apply plugin: 'androidx.navigation.safeargs'

android {
    compileSdkVersion 28
    defaultConfig {
        applicationId "com.dalydays.android.forecastmvvm"
        minSdkVersion 19
        targetSdkVersion 28
        versionCode 1
        versionName "1.0"
        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
        }
    }
}

dependencies {
    implementation fileTree(dir: 'libs', include: ['*.jar'])
    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
    implementation 'androidx.appcompat:appcompat:1.0.2'

    // Navigation
    implementation "android.arch.navigation:navigation-fragment:$navigation_version"
    implementation "android.arch.navigation:navigation-ui:$navigation_version"
    implementation "android.arch.navigation:navigation-fragment-ktx:$navigation_version"
    implementation "android.arch.navigation:navigation-ui-ktx:$navigation_version"
    implementation "androidx.core:core-ktx:1.0.1"
    implementation "androidx.constraintlayout:constraintlayout:1.1.3"

    // Room
    implementation "androidx.room:room-runtime:$room_version"
    implementation "androidx.legacy:legacy-support-v4:1.0.0"
    implementation 'androidx.lifecycle:lifecycle-extensions:2.0.0'
    implementation 'androidx.lifecycle:lifecycle-viewmodel-ktx:2.0.0'
    kapt "androidx.room:room-compiler:$room_version"

    // Gson
    implementation "com.google.code.gson:gson:2.8.5"

    // Kotlin Android Coroutines
    implementation 'org.jetbrains.kotlinx:kotlinx-coroutines-core:1.0.0-RC1'
    implementation "org.jetbrains.kotlinx:kotlinx-coroutines-android:1.0.0-RC1"

    // Retrofit
    implementation "com.squareup.retrofit2:retrofit:$retrofit_version"
    implementation "com.squareup.retrofit2:converter-gson:$retrofit_version"
    implementation 'com.jakewharton.retrofit:retrofit2-kotlin-coroutines-adapter:0.9.2'

    // ViewModel
    implementation "androidx.lifecycle:lifecycle-extensions:$lifecycle_version"
    implementation "androidx.lifecycle:lifecycle-viewmodel-ktx:$lifecycle_version"
    kapt "androidx.lifecycle:lifecycle-compiler:$lifecycle_version"

    // Kodein
    implementation "org.kodein.di:kodein-di-generic-jvm:$kodein_version"
    implementation "org.kodein.di:kodein-di-framework-android-x:$kodein_version"

    // Better dateTime-time support even on older Android versions
    implementation "com.jakewharton.threetenabp:threetenabp:1.1.0"

    // Glide
    implementation 'com.github.bumptech.glide:glide:4.8.0'
    kapt 'com.github.bumptech.glide:compiler:4.8.0'

    // Groupie RecyclerView
    implementation 'com.xwray:groupie:2.1.0'
    implementation 'com.xwray:groupie-kotlin-android-extensions:2.1.0'

    // Preference
    implementation "androidx.preference:preference:1.0.0"

    // Location
    implementation "com.google.android.gms:play-services-location:16.0.0"

    // New Material Design
    implementation "com.google.android.material:material:1.0.0"

    testImplementation 'junit:junit:4.12'
    androidTestImplementation 'androidx.test:runner:1.1.0'
    androidTestImplementation 'androidx.test.espresso:espresso-core:3.1.0'
}

[linucksrox]

If all your code looks good, try clicking on the menu Build -> Rebuild Project. If that doesn't work, you can also try File -> Invalidate Caches/Restart... And post what version of Android Studio you're using

[YesayaSoftware]

Thanks @linucksrox , I double check each file and Rebuild the project then Invalidate Caches/Restart. Now am good to go. Thanks

[divyansh1004]

Hi, I m getting the same issue.