Can'；t导入androidx.navigation.ui.AppBarConfiguration和androidx.navigation.ui.NavigationUI

我正在尝试将androidx.navigation.ui.AppBarConfiguration和androidx.navigation.ui.NavigationUI导入到我的主活动中

以下是我的主要活动：

package com.example.cyticketclient;

import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;

import com.google.android.material.bottomnavigation.BottomNavigationView;

import androidx.appcompat.app.AppCompatActivity;
import androidx.navigation.NavController;
import androidx.navigation.Navigation;
import androidx.navigation.ui.AppBarConfiguration;
import androidx.navigation.ui.NavigationUI;

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        BottomNavigationView navView = findViewById(R.id.nav_view);
        // Passing each menu ID as a set of Ids because each
        // menu should be considered as top level destinations.
        AppBarConfiguration appBarConfiguration = new AppBarConfiguration.Builder(
                R.id.navigation_sales,
                R.id.navigation_messages,
                R.id.navigation_forum,
                R.id.navigation_profile).build();

    }
}

我发现了错误

Cannot resolve symbol 'ui'

如何获取要导入的androidx.navigation.ui.AppBarConfiguration和androidx.navigation.ui.NavigationUI

这是我的身材。格雷德尔：

apply plugin: 'com.android.application'

android {
    compileSdkVersion 30
    buildToolsVersion "30.0.2"

    defaultConfig {
        applicationId "com.example.cyticketclient"
        minSdkVersion 16
        targetSdkVersion 30
        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 'androidx.appcompat:appcompat:1.2.0'
    implementation 'androidx.constraintlayout:constraintlayout:2.0.1'
    implementation 'androidx.legacy:legacy-support-v4:1.0.0'
    implementation 'androidx.recyclerview:recyclerview:1.1.0'
    implementation 'com.google.android.material:material:1.2.1'
    implementation 'androidx.navigation:navigation-runtime:2.3.0'
    testImplementation 'junit:junit:4.12'
    androidTestImplementation 'androidx.test.ext:junit:1.1.2'
    androidTestImplementation 'androidx.test.espresso:espresso-core:3.3.0'

    implementation 'com.android.volley:volley:1.1.1'

}

---

androidx.navigation.ui

中的类根据

---

请注意，如果要在导航图中使用

目的地，则需要将

导航运行时

依赖项替换为

导航片段

（

导航片段

依赖于

导航运行时

，因此如果依赖于

导航片段

，则无需显式声明对

导航运行时

的依赖）。

implementation 'androidx.navigation:navigation-ui:2.3.0'