Firebase视频开发报错：无法解析FirebaseRecyclerOptions等符号

问题现象 #

• 代码中FirebaseRecyclerOptions提示Cannot resolve symbol 'FirebaseRecyclerOptions'
• 导入语句com.firebase.ui.database.FirebaseRecyclerOptions提示Cannot resolve symbol 'firebase'
• 已添加Firebase数据库依赖和FirebaseUI数据库依赖，但问题仍未解决

用户提供的代码 #

源码

package com.example.coffecorner;

import android.os.Bundle;
import android.view.WindowManager;

import androidx.appcompat.app.AppCompatActivity;
import androidx.viewpager2.widget.ViewPager2;

import com.firebase.ui.database.FirebaseRecyclerOptions;
import com.google.firebase.database.FirebaseDatabase;
public class Videohome extends AppCompatActivity {
    ViewPager2 viewpager2;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_videohome);
        getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,WindowManager.LayoutParams.FLAG_FULLSCREEN);

        viewpager2=(ViewPager2)findViewById(R.id.vpager);

        FirebaseRecyclerOptions<videomodel> options =
                new FirebaseRecyclerOptions.Builder<videomodel>()
                        .setQuery(FirebaseDatabase.getInstance().getReference().child("videos"), videomodel.class)
                        .build();
    }
}

原Gradle文件

plugins {
    id 'com.android.application'
    id 'com.google.gms.google-services'
}

android {
    namespace 'com.example.coffecorner'
    compileSdk 33

    defaultConfig {
        applicationId "com.example.coffecorner"
        minSdk 24
        targetSdk 33
        versionCode 1
        versionName "1.0"

        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
    }

    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
        }
    }
    compileOptions {
        sourceCompatibility JavaVersion.VERSION_1_8
        targetCompatibility JavaVersion.VERSION_1_8
    }
    buildFeatures {
        viewBinding true
    }
}

dependencies {
    implementation fileTree(dir: "libs", include: ["*.jar"])
    implementation 'androidx.appcompat:appcompat:1.6.0'
    implementation 'com.google.android.material:material:1.8.0'
    implementation 'androidx.constraintlayout:constraintlayout:2.1.4'
    implementation 'com.google.firebase:firebase-auth:21.1.0'
    implementation 'androidx.navigation:navigation-fragment:2.4.1'
    implementation 'androidx.navigation:navigation-ui:2.4.1'
    testImplementation 'junit:junit:4.13.2'
    androidTestImplementation 'androidx.test.ext:junit:1.1.5'
    androidTestImplementation 'androidx.test.espresso:espresso-core:3.5.1'
    implementation "androidx.viewpager2:viewpager2:1.0.0"
    implementation "com.google.android.material:material:1.2.0-alpha02"
    implementation "com.makeramen:roundedimageview:2.3.0"
    implementation "androidx.viewpager2:viewpager2:1.0.0"
    implementation 'com.google.android.material:material:1.2.1'
    implementation 'com.google.android.material:material:1.6.0'
    implementation "androidx.viewpager2:viewpager2:1.0.0"

    implementation 'com.google.firebase:firebase-database:16.0.4'
    implementation 'com.firebaseui:firebase-ui-database:6.3.0'

}

解决方案 #

1. 修复版本兼容性问题
   当前使用的com.google.firebase:firebase-database:16.0.4版本过旧，和com.firebaseui:firebase-ui-database:6.3.0不兼容。FirebaseUI 6.3.0要求搭配19.3.0版本的firebase-database，替换依赖为：

   implementation 'com.google.firebase:firebase-database:19.3.0'
   implementation 'com.firebaseui:firebase-ui-database:6.3.0'
   

2. 清理重复依赖
   你的Gradle文件中存在大量重复依赖（如viewpager2、material库多次重复引入），会导致依赖解析混乱。删除重复项，保留最新版本：

   // 保留最新版本的material和viewpager2，删除其他重复条目
   implementation 'com.google.android.material:material:1.8.0'
   implementation "androidx.viewpager2:viewpager2:1.0.0"
   

3. 执行Gradle同步与清理

   • 点击Android Studio右上角的Sync Project with Gradle Files按钮重新同步
   • 执行Build > Clean Project，再执行Build > Rebuild Project
   • 若问题依旧，尝试File > Invalidate Caches... > Invalidate and Restart清除缓存并重启AS

内容的提问来源于stack exchange，提问作者Luigirazzo