android - 使用支持lib依赖性v7:26.1.0时发生Gradle dex问题

Question

您好，我的build.gradle文件有问题:

apply plugin: 'com.android.application'

android {
    compileSdkVersion 26
    defaultConfig {
        applicationId "com.example.dell"
        minSdkVersion 19
        targetSdkVersion 26
        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:design:26.1.0'
    implementation 'com.android.support:appcompat-v7:26.1.0'
    implementation 'com.android.support:support-v4:26.1.0'
    implementation 'com.android.support:cardview-v7:26.1.0'
    implementation 'com.android.support.constraint:constraint-layout:1.0.2'

    implementation 'com.google.firebase:firebase-firestore:12.0.1'
    implementation 'com.firebaseui:firebase-ui-firestore:3.3.0'
    implementation 'hanks.xyz:htextview-library:0.1.5'

    testImplementation 'junit:junit:4.12'
    androidTestImplementation 'com.android.support.test:runner:1.0.1'
    androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.1'
}

Android Studio向我发出此警告:

All com.android.support libraries must use the exact same version specification (mixing versions can lead to runtime crashes). Found versions 27.1.0, 26.1.0. Examples include com.android.support:recyclerview-v7:27.1.0 and com.android.support:animated-vector-drawable:26.1.0

有人能帮帮我吗？我不知道该怎么办。我什至尝试将其设置为27版。甚至删除了它，但仍然无法解决我的问题。

我也看到此错误:

Error:Execution failed for task ':app:transformDexArchiveWithExternalLibsDexMergerForDebug'.

java.lang.RuntimeException: java.lang.RuntimeException: com.android.builder.dexing.DexArchiveMergerException: Unable to merge dex

Answer 1

Android Studio警告

All com.android.support libraries must use the exact same version specification (mixing versions can lead to runtime crashes). Found versions 27.1.0, 26.1.0. Examples include com.android.support:recyclerview-v7:27.1.0 and com.android.support:animated-vector-drawable:26.1.0

问题

您的一个依赖项(com.firebaseui:firebase-ui-firestore:3.3.0)在com.android.support:recyclerview-v7:27.1.0上有一个transitive dependency。同时，您在构建文件中手动声明的支持库使用26.1.0版本。

解

将compileSdkVersion和targetSdkVersion更新为27，并将您的支持库更新为27.1.1

android {
    compileSdkVersion 27
    defaultConfig {
        targetSdkVersion 27
        ...
    }
    ...
}

dependencies {
    implementation fileTree(dir: 'libs', include: ['*.jar'])
    implementation 'com.android.support:design:27.1.1'
    implementation 'com.android.support:cardview-v7:27.1.1'
    ...
}

提示(可选)

由于com.android.support:design对com.android.support:appcompat-v7和com.android.support:support-v4具有传递依赖关系，因此，如果您声明appcompat-v7依赖关系，则不必手动声明support-v4或design依赖关系。