android - android:gradle:依赖版本相同

Question

我想将fcm添加到我的android项目中。按照指南，我将firebase添加到我的应用程序并插入了依赖项。但是现在我得到了错误

All com.android.support libraries must use the exact same version specification (mixing versions can lead to runtime crashes). 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

关于appcompat依赖(或者也许我之前没有注意到它)

apply plugin: 'com.android.application'

android {
    compileSdkVersion 28
    defaultConfig {
        applicationId "myApp.ginso.com.azul"
        minSdkVersion 26
        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-messaging:17.3.4'
    testImplementation 'junit:junit:4.12'
    androidTestImplementation 'com.android.support.test:runner:1.0.2'
    androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.1'
}

谁能告诉我，我必须改变什么？

Answer 1

问题是 espresso核心正在使用支持库组的较早依赖性。将其增加到最新版本(3.0.2或任何最新版本)，或使用以下代码代替您的现有代码从其中明确删除支持组:

androidTestImplementation ('com.android.support.test.espresso:espresso-core:3.0.1') {
    exclude group: "com.android.support"
}

希望这能解决您的问题。