java - QueryDocumentSnapshot 无法解析

Question

QueryDocumentSnapshot 并非无法解析。我尝试更改 firebase-firestore 和 firebase-core 依赖项的版本，但仍然不起作用。

以下是 Firebase 导入:

import com.google.firebase.auth.FirebaseAuth;
import com.google.firebase.auth.FirebaseUser;
import com.google.firebase.firestore.DocumentReference;
import com.google.firebase.firestore.FirebaseFirestore;
import com.google.firebase.firestore.QueryDocumentSnapshot;
import com.google.firebase.firestore.QuerySnapshot;

这里是依赖

    implementation fileTree(include: ['*.jar'], dir: 'libs')
    implementation 'com.android.support:appcompat-v7:27.1.1'
    implementation 'com.android.support.constraint:constraint-layout:1.1.3'
    implementation 'com.google.firebase:firebase-auth:11.8.0'
    implementation 'de.hdodenhof:circleimageview:3.0.0'
    implementation 'com.github.bumptech.glide:glide:4.9.0'
    implementation 'com.google.firebase:firebase-database:11.8.0'
    implementation 'com.android.support:support-v4:26.1.0'
    annotationProcessor 'com.github.bumptech.glide:compiler:4.9.0'
    implementation 'com.getbase:floatingactionbutton:1.10.1'
    implementation 'com.theartofdev.edmodo:android-image-cropper:2.6.+'
    implementation 'com.google.firebase:firebase-storage:11.8.0'
    implementation 'com.google.firebase:firebase-firestore:11.8.0'
    implementation 'com.google.firebase:firebase-core:11.8.0'

    testImplementation 'junit:junit:4.12'
    androidTestImplementation 'com.android.support.test:runner:1.0.2'
    androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'
    implementation 'com.android.support:design:27.1.1'
    implementation 'com.android.support:cardview-v7:27.1.1'
    implementation files('libs/activation.jar')
    implementation files('libs/additionnal.jar')
    implementation files('libs/mail.jar')

Answer 1

要解决这个问题，请更改以下依赖项:

implementation 'com.google.firebase:firebase-storage:11.8.0'
implementation 'com.google.firebase:firebase-firestore:11.8.0'
implementation 'com.google.firebase:firebase-core:11.8.0'

与相应的最新版本:

implementation 'com.google.firebase:firebase-storage:16.1.0'
implementation 'com.google.firebase:firebase-firestore:18.2.0'
implementation 'com.google.firebase:firebase-core:16.0.8'

还要确保:

classpath 'com.google.gms:google-services:4.2.0'

在您的 build.gradle(项目)文件中。