无法解析：com.google.firebase:firebase-core:9.0.0

Question

我想在我的安卓应用程序中使用 Firebase 进行身份验证。

1. I create the app then downloaded the JSON File and Paste it into app folder

2. I added this to my build.gradle > Project

    // Top-level build file where you can add configuration options common to all sub-projects/modules.
   
   buildscript {
       repositories {
           jcenter()
       }
       dependencies {
           classpath 'com.android.tools.build:gradle:2.2.1'
           classpath 'com.google.gms:google-services:3.0.0'
           // NOTE: Do not place your application dependencies here; they belong
           // in the individual module build.gradle files
       }
   }
   
   allprojects {
       repositories {
           jcenter()
       }
   }
   
   task clean(type: Delete) {
       delete rootProject.buildDir
   }
   

3. add this apply to my build.gradle > app

   apply plugin: 'com.android.application'
   android {
       compileSdkVersion 24
       buildToolsVersion "23.0.1"
       defaultConfig {
           applicationId "com.example.mahmoud.loginwithfirebase"
           minSdkVersion 15
           targetSdkVersion 24
           versionCode 1
           versionName "1.0"
           testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
       }
       buildTypes {
           release {
               minifyEnabled false
               proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
           }
       }
   }
   
   dependencies {
   
       compile fileTree(dir: 'libs', include: ['*.jar'])
       androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {
           exclude group: 'com.android.support', module: 'support-annotations'
       })
       compile 'com.android.support:appcompat-v7:24.2.1'
       testCompile 'junit:junit:4.12'
   }
   apply plugin: 'com.google.gms.google-services'
   

   but this error appeared

4. this MainActivity.java

   package com.example.mahmoud.loginwithfirebase;
   
   import android.support.v7.app.AppCompatActivity;
   import android.os.Bundle;
   
       public class MainActivity extends AppCompatActivity {
   
           @Override
           protected void onCreate(Bundle savedInstanceState) {
               super.onCreate(savedInstanceState);
               setContentView(R.layout.activity_main);
           }
       }
   

- Mahmoud Belal

---

“this error appear to me”不是一个非常明确的标题。将来您可能需要考虑使标题更具体以解决问题。 - ChiefTwoPencils

Answer 1

将此行com.google.firebase:firebase-auth:9.6.1'添加到您的build.gradle依赖项中，就像这里一样：https://firebase.google.com/docs/android/setup，但是请使用auth而不是core。

- T.S

---

错误：（25，13）无法解析：com.google.firebase:firebase-auth:9.6.1 <a href="openFile:C:/Users/mahmoud/AndroidStudioProjects/LoginWithFirebase/app/build.gradle">在文件中查看</a><br><a href="open.dependency.in.project.structure">在项目结构对话框中查看</a> - Mahmoud Belal

前往Android SDK管理器并安装最新版本的两个库：Google Play服务和Google存储库。如果无法使用，请尝试使用firebase-auth:9.6.0而不是9.6.1。 - T.S