android - AndroidError:程序类型已存在:当我尝试从Android Studio生成Signed APK时，android_serialport_api.SerialPort

Question

将.aar文件添加到应用gradle后，我得到指定的异常:程序类型已存在:android_serialport_api.SerialPort
当我尝试构建Debug APK时，它可以工作，但是当我尝试构建Signed APK时，则给出了指定的异常(exception)。
以下是我的应用程序等级文件

 apply plugin: 'com.android.application'

android {
    compileSdkVersion 28
    buildToolsVersion '28.0.3'
    defaultConfig {
        applicationId "XX.XX.XX"
        minSdkVersion 22
        targetSdkVersion 28
        versionCode 27
        versionName "6.6"
        multiDexEnabled true
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
    }
    buildTypes {
        release {
            minifyEnabled true
            useProguard true
            shrinkResources true
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }

    compileOptions {
        sourceCompatibility JavaVersion.VERSION_1_8
        targetCompatibility JavaVersion.VERSION_1_8
    }
    configurations {
        all*.exclude group: 'com.squareup.okhttp3';
        all*.exclude group: 'com.squareup.okio';
    }
   
}

repositories {
    maven { url "jitpack.io" }
    maven { name 'glide-snapshot'; url 'oss.sonatype.org/content/repositories/snapshots' }
    mavenCentral()
}

dependencies {
   
    implementation files('libs/apache-httpcomponents-httpclient.jar')
    implementation files('libs/apache-httpcomponents-httpcore.jar')

    implementation files('libs/commons-codec-1.11.jar')
    implementation 'com.android.support:appcompat-v7:28.0.0'
    implementation 'com.android.support:design:28.0.0'
    implementation 'com.journeyapps:zxing-android-embedded:3.5.0'
    implementation 'com.android.support:cardview-v7:28.0.0'
    implementation 'com.google.android.gms:play-services-location:11.0.4'
    implementation 'com.google.firebase:firebase-messaging:11.0.4'
    implementation 'com.jakewharton.timber:timber:4.5.1'
    implementation 'com.android.support.constraint:constraint-layout:1.1.3'

    implementation 'com.android.support:support-v4:28.0.0'
    implementation 'com.github.bumptech.glide:glide:4.9.0'
    implementation 'me.dm7.barcodescanner:zxing:1.8.4'
    implementation 'com.loopj.android:android-async-http:1.4.9'
    implementation 'com.android.support:multidex:1.0.3'
    implementation 'com.github.antonKozyriatskyi:CircularProgressIndicator:1.3.0'

    implementation 'com.google.code.gson:gson:2.6.2'
    implementation 'com.squareup.retrofit2:retrofit:2.0.2'
    implementation 'com.squareup.retrofit2:converter-gson:2.0.2'
    implementation 'com.android.support:recyclerview-v7:28.0.0'
    //implementation group: 'org.bouncycastle', name: 'bcprov-jdk15on', version: '1.54'
    implementation 'com.google.android.gms:play-services-maps:11.0.4'

    /*implementation(name: 'merchantsdk', ext: 'aar')*/
    /*implementation(name: 'merchantsdk', ext: 'aar'){
        exclude module: 'SerialPort'
    }*/
    /*implementation(name: 'ezetapandroidsdk', ext: 'aar')*/

    implementation project(':merchantsdk')
    implementation project(':ezetapandroidsdk')

    testImplementation 'junit:junit:4.12'
    implementation files('libs/org.apache.commons.io.jar')
}


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

以下是Project Gradle文件

// Top-level build file where you can add configuration options common to all sub-projects/modules.

buildscript {
    repositories {
        maven { url "https://jcenter.bintray.com"}
        jcenter()
        maven {
            url 'https://maven.google.com/'
            name 'Google'
        }
        google()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:3.5.1'

        // NOTE: Do not place your application dependencies here; they belong
        // in the individual module build.gradle files
        classpath 'com.google.gms:google-services:4.2.0'
    }
}

allprojects {
    repositories {
        google()
        jcenter()
        maven {
            url 'https://jitpack.io'
        }
        maven {
            url 'https://maven.google.com/'
            name 'Google'
        }

    }
}

task clean(type: Delete) {
    delete rootProject.buildDir
}

以下是异常(exception)

  > Task :app:transformClassesAndResourcesWithR8ForRelease FAILED
AGPBI: {"kind":"error","text":"Program type already present: android_serialport_api.a","sources":[{}],"tool":"R8"}

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':app:transformClassesAndResourcesWithR8ForRelease'.
> com.android.tools.r8.CompilationFailedException: Compilation failed to complete

调试apk正常运行，但是当我尝试构建上述异常的签名APK时。
请对此提供帮助。谢谢。

Answer 1

问题是您使用android_serialport_api.SerialPort有一个以上的软件包。
有两种处理方法。首先是检查每个库并检查它是否正在使用它，或者可以通过运行以下命令找到重复的库:

gradlew -q dependencies yourProject:dependencies --configuration implementation

您也可以将其从merchantsdk中排除，如下所示:

implementation(name: 'merchantsdk', ext: 'aar'){
    exclude module: 'SerialPort'
}