Error:Execution failed for task ':app:preDebugAndroidTestBuild'. > Conflict with dependency 'com.

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刚开学做项目运行AS编译器,发生如下错误

Error:Execution failed for task ':app:preDebugAndroidTestBuild'.
> Conflict with dependency 'com.android.support:support-annotations' in project ':app'. Resolved versions for app (26.1.0) and test app (27.1.1) differ. See https://d.android.com/r/tools/test-apk-dependency-conflicts.html for details.

发生这类型的错误,是当我们修改了.build中的compileSdkVersion,产生所依赖的dependency与当前版本不一致导致的。

上网查询了一些解决方法总结如下:

解决方法一:

build->Rebuid-project

上面这种方法亲测可行

解决方法二:

在build.gradle中将

implementation 'com.android.support:appcompat-v7:26.1.0'

androidTestImplementation 'com.android.support:support-annotations:26.1.0'

修改为最新的版本(27.1.1) 

implementation 'com.android.support:appcompat-v7:27.1.1'

androidTestImplementation 'com.android.support:support-annotations:27.1.1'

 同时更正build.gradle中的compileSdkVersion和targetSdkVersion版本为27:

复制代码
compileSdkVersion 27
    defaultConfig {
        applicationId "com.hero"    //改成自己的applicationId
        minSdkVersion 'P'
        targetSdkVersion 27
        versionCode 1
        versionName "1.0"
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
}

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转载自blog.csdn.net/qq_37283570/article/details/80198969