添加Firebase连接时，为什么在实现'com.android.support:appcompat-v7:28.0.0'时出现错误？

Question

When I modify my build.gradle files to use the Firebase plugin, It shows me an error on implementation 'com.android.support:appcompat-v7:28.0.0'

I have already added the google-services.json file into my Android app module root directory.

My error: Issue ID= Gradle compatible

All com.android.support libraries must have the exact same version specification...Found versions 28.0.0,26.1.0. Examples include com.android.support:animated-vector-drawable:28.0.0 and com.android.support:support-media-compat:26.1.0

I have tried to comment it out:

//noinspection GradleCompatible

implementation 'com.android.support:appcompat-v7:28.0.0'

But also it didn't work it cant communicate with firebase servers

apply plugin: 'com.android.application'

android {
compileSdkVersion 28

defaultConfig {
    applicationId "com.example.android.tinder"
    minSdkVersion 15
    targetSdkVersion 28
    versionCode 1
    versionName "1.0"
    testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
}
buildTypes {
    release {
        minifyEnabled false
        proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
    }
}
}

dependencies {
implementation fileTree(dir: 'libs', include: ['*.jar'])
implementation 'com.android.support:appcompat-v7:28.0.0'
implementation 'com.android.support.constraint:constraint-layout:1.1.3'
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.lorentzos.swipecards:library:1.0.9'
implementation 'com.google.firebase:firebase-core:16.0.6'
implementation 'com.google.firebase:firebase-database:16.0.5'
implementation 'com.google.firebase:firebase-auth:16.1.0'
}
apply plugin: 'com.google.gms.google-services'

My build.gradle code(Project)

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

buildscript {

repositories {
    google()
    jcenter()
}
dependencies {
    classpath 'com.android.tools.build:gradle:3.2.1'
    classpath 'com.google.gms:google-services:4.2.0'

    // 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
 }

I just expect to be able to connect my Firebase to my android app

Answer 1

The solution is:

implementation fileTree(dir: 'libs', include: ['*.jar'])
implementation 'com.android.support:appcompat-v7:28.0.0'
implementation 'com.android.support.constraint:constraint-layout:1.1.3'
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:28.0.0'

implementation 'com.android.support:support-media-compat:28.0.0' // NEED TO ADD
implementation 'com.android.support:support-v4:28.0.0' //NEED TO ADD

implementation 'com.google.firebase:firebase-storage:16.0.5'

Answer 2

I solved my problem by changing the version of Fire-base and classpath dependencies.

The latest version of dependencies conflicted with implementation 'com.android.support:appcompat-v7:28.0.0' in App level build.gradle .

My changes are given below

• implementation 'com.google.firebase:firebase-core:17.0.1' to implementation 'com.google.firebase:firebase-core:16.0.8' in App level build.gradle file.

• classpath 'com.google.gms:google-services:4.3.0' to classpath 'com.google.gms:google-services:4.2.0' in Project level build.gradle file.

* If you migrate your project to AndroidX, then you will be able to use all the latest dependencies without facing this kind of errors *