gradle.build文件中的问题

Question

<

apply plugin: 'com.android.application'

android {
    compileSdkVersion 28
    buildToolsVersion "25.0.3"
    defaultConfig {
        applicationId "afterapps.com.firebaseim"
        minSdkVersion 21
        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'
        }
    }
}
repositories {
    jcenter()
    maven{
        url "https://maven.google.com"
    }
}
repositories {
    jcenter()
    mavenCentral()
    maven {
        url "https://jitpack.io"
    }
}

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'
    })
    implementation 'com.android.support:appcompat-v7:27.1.1'
    implementation 'com.android.support:cardview-v7:27.1.1'
    implementation 'com.android.support:design:27.1.1'
    implementation 'com.android.support:support-v4:27.1.1'
    implementation 'com.google.firebase:firebase-auth:19.2.0'
    implementation 'com.google.firebase:firebase-database:19.2.0'
    implementation 'com.google.firebase:firebase-messaging:20.1.0'
    implementation 'com.firebaseui:firebase-ui-database:1.2.0'
    implementation 'com.google.android.gms:play-services-auth:17.0.0'
    implementation 'com.android.support.constraint:constraint-layout:1.1.3'
    implementation 'com.github.bumptech.glide:glide:4.8.0'
    implementation 'jp.wasabeef:glide-transformations:2.0.1'
    implementation 'frankiesardo:icepick:3.2.0'
    implementation 'org.greenrobot:eventbus:3.0.0'
    implementation 'com.jakewharton:butterknife:8.4.0'
    implementation 'com.zsoltsafrany:needle:1.0.0'
    testCompile 'junit:junit:4.12'
    annotationProcessor 'com.jakewharton:butterknife-compiler:8.4.0'
    provided 'frankiesardo:icepick-processor:3.2.0'
    implementation 'joda-time:joda-time:2.9.7'
}



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

[1]：https://github.com/MahmoudAlyuDeen/FirebaseIM “ >><< > 
将其更改为您的buildToolsVersion。您的项目之所以显示此内容，是因为您提供的库版本高于buildToolsVersion。
implementation 'com.android.support:appcompat-v7:27.1.1'
implementation 'com.android.support:cardview-v7:27.1.1'
implementation 'com.android.support:design:27.1.1'
implementation 'com.android.support:support-v4:27.1.1'
我认为您不需要实现cardView库。当您已经实现了设计库时。
您可以
Alt
 + 
Enter
。它将解决您的问题

Answer 1