Question

build.gradle

应用插件：“ com.android.application”

android {

compileSdkVersion 27
defaultConfig {
    applicationId "com.appium_new"
    minSdkVersion 26
    targetSdkVersion 27
    versionCode 1
    versionName "1.0"
    testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"

    packagingOptions {
        exclude 'lang-708-input.txt'
        exclude 'java.policy'
    }

}
buildTypes {
    release {
        minifyEnabled false
        proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
    }
}

}

依赖性{

implementation fileTree(include: ['*.jar'], dir: 'libs')
implementation 'com.android.support:appcompat-v7:27.1.1'
implementation 'com.android.support.constraint:constraint-layout:1.1.3'
testImplementation 'junit:junit:4.12'
androidTestImplementation 'com.android.support.test:runner:1.0.2'
androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'
implementation files('src/libs/byte-buddy-1.8.15.jar')
implementation files('src/libs/commons-exec-1.3.jar')
implementation files('src/libs/commons-lang3-3.9.jar')
implementation files('src/libs/commons-lang3-3.9-sources.jar')
implementation files('src/libs/commons-lang3-3.9-test-sources.jar')
implementation files('src/libs/commons-lang3-3.9-tests.jar')
implementation files('src/libs/guava-25.0-jre.jar')
implementation files('src/libs/java-client-7.3.0.jar')
implementation files('src/libs/okhttp-3.11.0.jar')
implementation files('src/libs/okio-1.14.0.jar')
implementation files('src/libs/selenium-server-standalone-3.141.59.jar')

}

添加了最后一个库即实现文件（'src / libs / selenium-server-standalone-3.141.59.jar'）后，显示以下错误，如果我删除了该库，则可以正常工作

2019-11-13 18：05：44.994 12737-12744 /？ E / com.appium_new：无法将DDMS数据包REAQ发送到调试器（-1 / 20）：管道损坏

2019-11-13 18：05：45.587 12737-12737 /？ E / AndroidRuntime：致命异常：main 流程：com.appium_new，PID：12737

java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.appium_new/com.appium_new.MainActivity}: java.lang.ClassNotFoundException: Didn't find class "com.appium_new.MainActivity" on path: DexPathList[[zip file "/system/framework/org.apache.http.legacy.boot.jar", zip file "/data/app/com.appium_new-0MtEr8TXu2cbQ_krT1jqPg==/base.apk"],nativeLibraryDirectories=[/data/app/com.appium_new-0MtEr8TXu2cbQ_krT1jqPg==/lib/x86, /system/lib]]
    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2843)
    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3048)
    at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:78)
    at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:108)
    at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:68)
    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1808)
    at android.os.Handler.dispatchMessage(Handler.java:106)
    at android.os.Looper.loop(Looper.java:193)
    at android.app.ActivityThread.main(ActivityThread.java:6669)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858)
 Caused by: java.lang.ClassNotFoundException: Didn't find class "com.appium_new.MainActivity" on path: DexPathList[[zip file "/system/framework/org.apache.http.legacy.boot.jar", zip file "/data/app/com.appium_new-0MtEr8TXu2cbQ_krT1jqPg==/base.apk"],nativeLibraryDirectories=[/data/app/com.appium_new-0MtEr8TXu2cbQ_krT1jqPg==/lib/x86, /system/lib]]
    at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:134)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:379)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:312)
    at android.app.AppComponentFactory.instantiateActivity(AppComponentFactory.java:69)
    at android.app.Instrumentation.newActivity(Instrumentation.java:1215)
    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2831)
    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3048) 
    at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:78) 
    at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:108) 
    at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:68) 
    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1808) 
    at android.os.Handler.dispatchMessage(Handler.java:106) 
    at android.os.Looper.loop(Looper.java:193) 
    at android.app.ActivityThread.main(ActivityThread.java:6669) 
    at java.lang.reflect.Method.invoke(Native Method) 
    at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493) 
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858) 
    Suppressed: java.lang.NoClassDefFoundError: Failed resolution of: Landroid/support/v7/app/AppCompatActivity;
    at java.lang.VMClassLoader.findLoadedClass(Native Method)
    at java.lang.ClassLoader.findLoadedClass(ClassLoader.java:738)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:363)
            ... 15 more
 Caused by: java.lang.ClassNotFoundException: Didn't find class "android.support.v7.app.AppCompatActivity" on path: DexPathList[[zip file "/system/framework/org.apache.http.legacy.boot.jar", zip file "/data/app/com.appium_new-0MtEr8TXu2cbQ_krT1jqPg==/base.apk"],nativeLibraryDirectories=[/data/app/com.appium_new-0MtEr8TXu2cbQ_krT1jqPg==/lib/x86, /system/lib]]
    at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:134)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:379)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:312)
            ... 18 more

Answer 1

添加库gradle后未正确同步，因此显示错误“找不到类'.MainActivity'”：

主要问题是某些gradle文件具有相同的内部文件，例如：-

NULL 或

WHERE (a.Checkdate >= b.ValidFrom OR b.ValidFrom IS NULL) AND (a.CheckDate < b.ValidTill OR B.ValidTill IS NULL)

因此无法成功同步，

或者第二种选择是使用gradle版本，例如

implementation files('src/libs/okhttp-3.11.0.jar')
 implementation files('src/libs/okio-1.14.0.jar')

并根据您的需要放置版本...

主要问题是ClassNotFoundException，因此请检查此link给出了许多解决方案。使用它，看看您的项目有什么用。

添加库后，显示此错误在路径：DexPathList上找不到类“ .MainActivity”

1 个答案: