Failed to resolve: firebase-auth-15.0.0 [closed]

问题:

Hello fellow developer i'm new to Android Development I just want to know how to resolve this kind of problem because i need to connect my app to firebase.

    apply plugin: 'com.android.application'
    apply plugin: 'com.google.gms.google-services'

    android {
compileSdkVersion 28
defaultConfig {
    applicationId "com.acemergencyapp.user.aceapp"
    minSdkVersion 14
    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'
implementation 'com.google.firebase:firebase-core:16.0.3'
implementation 'com.google.firebase:firebase-auth:16.0.3'
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.google.firebase:firebase-auth:16.0.1:15.0.0'
  }

I have a red line in implementation 'com.android.support:appcompat-v7:28.0.0'

回答1:

implementation 'com.google.firebase:firebase-auth:16.0.1:15.0.0'

Remove this dependency (last line)

You have already included version 16.0.3 above

回答2:

you have two version numbers there... obviously a copy & paste fail.

implementation 'com.google.firebase:firebase-auth:16.0.1:15.0.0'

probably should rather be (which is already contained a few lines above):

implementation 'com.google.firebase:firebase-auth:16.0.3'

... maybe read your build.gradle, before posting your typos here.

回答3:

Solution:

Navigate to SDK Manager -> SDK Tools.

First, click the Android SDK Build-Tools and install the latest update.

Second, click the Android SDK Platform-Tools and install the latest update.

This should fix the red line.

(Alternatively suppose if it does not go try the below code)

Write this:

implementation 'com.android.support:support-v4:28.0.0'

or this:

implementation 'com.android.support:design:28.0.0'

Hope it helps.