android – 什么是“程序类型已存在”？

当我尝试构建我的project.i得到此错误

Program type already present: android.support.v4.accessibilityservice.AccessibilityServiceInfoCompat
Message{kind=ERROR, text=Program type already present: android.support.v4.accessibilityservice.AccessibilityServiceInfoCompat, sources=[Unknown source file], tool name=Optional.of(D8)}

我也找到堆栈溢出的解决方案,但它没有帮助.我的build.gradle文件

    apply plugin: 'com.android.application'android {
compileSdkVersion 28
defaultConfig {
    applicationId "com.example.hassan.qrscan"
    minSdkVersion 18
    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'])
//noinspection GradleCompatible
implementation 'com.android.support:appcompat-v7:28.0.0-alpha1'
implementation 'com.android.support.constraint:constraint-layout:1.0.2'
implementation 'me.dm7.barcodescanner:zxing:1.9'
implementation 'com.journeyapps:zxing-android-embedded:3.0.2@aar'
implementation 'com.android.support:design:28.0.0'
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'}

解决方法:

 implementation 'com.android.support:appcompat-v7:28.0.0-alpha1'

将依赖版本降级为

 implementation 'com.android.support:appcompat-v7:27.1.0'

并添加设计依赖项

 implementation 'com.android.support:design:27.1.0'

一旦这对我有效,请检查一下

标签：android,android-studio,android-studio-3-1
来源： https://codeday.me/bug/20190627/1303548.html