即使启用了multiDex，任务'：app：transformDexArchiveWithExternalLibsDexMergerForDebug'错误的执行失败

Question

我正在尝试在我的设备上运行该应用，但每次都收到此错误：

错误：任务“执行失败：app:transformDexArchiveWithExternalLibsDexMergerForDebug”。 java.lang.RuntimeException: com.android.builder.dexing.DexArchiveMergerException: 无法合并 dex

这里是build.gradle (Module: app)：

apply plugin: 'com.android.application'

android {
    compileSdkVersion 28
    defaultConfig {
        applicationId "com.abc.xyz"
        minSdkVersion 23
        targetSdkVersion 26
        versionCode 1
        versionName "1.0"
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
        multiDexEnabled true
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
}

dependencies {
    implementation fileTree(include: ['*.jar'], dir: 'libs')
    implementation 'com.android.support:appcompat-v7:26.1.0'
    implementation 'com.android.support.constraint:constraint-layout:1.1.3'
    testImplementation 'junit:junit:4.12'
    androidTestImplementation('com.android.support.test.espresso:espresso-core:2.2') {
        // Necessary if your app targets Marshmallow (since Espresso
        // hasn't moved to Marshmallow yet)
        exclude group: 'com.android.support', module: 'support-annotations'
    }
    androidTestImplementation('com.android.support.test:runner:0.3') {
        // Necessary if your app targets Marshmallow (since the test runner
        // hasn't moved to Marshmallow yet)
        exclude group: 'com.android.support', module: 'support-annotations'
    }
    implementation('com.kc.androidunsplash:androidunsplash:1.0.3') {
        exclude group: 'com.android.support'
        exclude module: 'appcompat-v7'
        exclude module: 'support-v4'
    }
    implementation 'com.squareup.picasso:picasso:2.71828'
    implementation 'androidx.appcompat:appcompat:1.0.2'
    implementation 'androidx.recyclerview:recyclerview:1.0.0'
}

我已经搜索了很多解决方案，但还没有找到任何解决方案。

Answer 1

我可以看到您正在从 android 迁移到 androidx

Here is official documentation for the migration from androidX

对于上述问题，您需要更改 gradle 文件，如下所示

    apply plugin: 'com.android.application'

android {
    compileSdkVersion 28
    defaultConfig {
        applicationId "com.backpaper.backpapers"
        minSdkVersion 23
        targetSdkVersion 26
        versionCode 1
        versionName "1.0"
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
       // multiDexEnabled true
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }

}

dependencies {
    implementation fileTree(include: ['*.jar'], dir: 'libs')
    //implementation 'com.android.support:appcompat-v7:26.1.0'
    implementation 'com.google.android.material:material:1.1.0-alpha02'
    implementation('com.kc.androidunsplash:androidunsplash:1.0.3') {
        exclude group: 'com.android.support'
        exclude module: 'appcompat-v7'
        exclude module: 'support-v4'
    }
    implementation 'com.squareup.picasso:picasso:2.71828'
    implementation 'androidx.appcompat:appcompat:1.0.2'
    implementation 'androidx.recyclerview:recyclerview:1.0.0'
    //implementation 'androidx.multidex:multidex:2.0.1'
    testImplementation 'junit:junit:4.12'
    androidTestImplementation 'androidx.test.espresso:espresso-core:3.1.1'
    androidTestImplementation 'androidx.test:runner:1.1.1'

}

在activity_main布局文件里面改成

<com.google.android.material.floatingactionbutton.FloatingActionButton
        android:id="@+id/fab_download"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:src="@android:drawable/stat_sys_download"
        android:layout_alignParentEnd="true"
        android:layout_alignParentBottom="true"
        android:layout_margin="12dp"
        app:elevation="6dp"
        app:pressedTranslationZ="12dp"/>

MainActivity 内部导入

   import com.google.android.material.floatingactionbutton.FloatingActionButton;
import androidx.appcompat.app.AppCompatActivity;