生成 APK 但未构建和部署时构建失败

Question

我的项目在我的模拟器上构建并运行，但当我尝试为我的项目生成 APK 时失败。我在尝试生成发布 APK 时收到以下错误：

警告：com.google.android.gms.gcm.GcmTaskService：找不到 程序类中引用的字段“android.os.IBinder zzaHj” com.google.android.gms.gcm.PendingCallback

警告：有 1 个 对程序类成员的未解决引用。

警告：异常 处理任务时 java.io.IOException: 请更正上述 首先警告。

错误：任务执行失败 ':app:transformClassesAndResourcesWithProguardForRelease'.

---

我的 proguard-rules.pro

-assumenosideeffects class android.util.Log {
    public static boolean isLoggable(java.lang.String, int);
    public static int v(...);
    public static int i(...);
    public static int w(...);
    public static int d(...);
    public static int e(...);
}

# Attempted below to fix issue
#-keep public class com.google.android.gms.* { public *; }
#-dontwarn com.google.android.gms.**

Build.gradle

apply plugin: 'com.android.application'

repositories {
  google()
  // Alternative attempt to resolve
  //    jcenter()
  //    maven {
  //        url "https://maven.google.com"
  //    }
}

dependencies {

    compile fileTree(include: ['*.jar'], dir: 'libs')

    compile "com.android.support:support-v4:25.3.1"
    compile "com.android.support:support-v13:25.3.1"
    compile "com.android.support:cardview-v7:25.3.1"
    compile "com.android.support:appcompat-v7:25.3.1"
    compile 'com.google.firebase:firebase-auth:11.0.2'
    compile 'com.google.firebase:firebase-database:11.0.2'
    compile 'com.google.firebase:firebase-crash:11.0.2'
    compile 'com.google.firebase:firebase-config:11.0.2'
    compile 'com.google.firebase:firebase-storage:11.0.2'
    compile 'com.google.firebase:firebase-messaging:11.0.2'
    compile 'com.google.firebase:firebase-core:11.0.2'
    compile 'com.google.android.gms:play-services:11.0.2'
    compile 'com.firebase:firebase-jobdispatcher:0.6.0'
    compile 'com.android.support:design:25.1.0'
    compile 'com.android.support.constraint:constraint-layout:1.0.2'
    testCompile 'junit:junit:4.12'
}

List<String> dirs = [
        'main',     // main sample code; look here for the interesting stuff.
        'common',   // components that are reused by multiple samples
        'template'] // boilerplate code that is generated by the sample template process

android {
    compileSdkVersion 27
    buildToolsVersion '27.0.0'

    defaultConfig {
        applicationId "com.company.app"
        minSdkVersion 21
        targetSdkVersion 27
        versionCode 12
        versionName "1.11"
        multiDexEnabled true
    }

    compileOptions {
        sourceCompatibility JavaVersion.VERSION_1_7
        targetCompatibility JavaVersion.VERSION_1_7
    }

    sourceSets {
        main {
            dirs.each { dir ->
                java.srcDirs "src/${dir}/java"
                res.srcDirs "src/${dir}/res"
            }
        }
        androidTest.setRoot('tests')
        androidTest.java.srcDirs = ['tests/src']

    }


    buildTypes {
        release {
            minifyEnabled true // Enables code shrinking for the release build type.
            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
        }
        debug {
            debuggable true
        }
    }
    productFlavors {
    }

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

---

尝试修复

1. 我已尝试将以下内容添加到我的proguard-rules.pro（建议here）：

   -保持公共类 com.google.android.gms.* { public *; } -dontwarn com.google.android.gms.**

但这只会产生以下问题：

警告：处理任务 java.io.IOException 时出现异常：不能 写 [/Users/myName/Documents/myProjectFolder/app/build/intermediates/transforms/proguard/release/jars/3/1f/main.jar] （看不懂 [/Users/myName/.android/build-cache/a80bb41778b1f73h09e3t326jn804m46e280aw10/output/jars/classes.jar(;;;;;;**.class)] （重复的 zip 条目 [classes.jar:com/google/android/gms/gcm/PendingCallback.class]))

1. https://stackoverflow.com/a/46047978/4206520
2. https://stackoverflow.com/a/33953133/4206520

---

有谁知道为什么我的构建在生成 APK 时失败，但没有构建和部署（以及如何防止它发生）？

Answer 1

请删除

compile 'com.google.android.gms:play-services:11.0.2'

来自dependencies 在build.gradle 文件中

使用下面链接中给出的依赖项中的各个模块 Set up Google Play Services

Duplicate Entry 错误意味着，您的项目中有两个相同的类，并且它们之间存在冲突