Question

的gradle：

classpath 'com.android.tools.build:gradle:3.0.1'

我做了：

禁用即时运行
构建 - ＆gt;清理项目
构建 - >构建APK（s）
adb install app-debug.apk
启动申请

日志错误：

 FATAL EXCEPTION: main
Process: com.example, PID: 23753
java.lang.RuntimeException: Unable to instantiate application com.example.TheApplication: java.lang.ClassNotFoundException: Didn't find class "com.example.TheApplication" on path: DexPathList[[zip file "/data/app/com.example-1/base.apk"],nativeLibraryDirectories=[/data/app/com.example-1/lib/arm, /data/app/com.example-1/base.apk!/lib/armeabi-v7a, /vendor/lib, /system/lib]]
at android.app.LoadedApk.makeApplication(LoadedApk.java:676)
at android.app.ActivityThread.handleBindApplication(ActivityThread.java:6289)
at android.app.ActivityThread.access$1800(ActivityThread.java:221)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1860)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:158)
at android.app.ActivityThread.main(ActivityThread.java:7224)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1230)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1120)
Caused by: java.lang.ClassNotFoundException: Didn't find class "com.example.TheApplication" on path: DexPathList[[zip file "/data/app/com.example-1/base.apk"],nativeLibraryDirectories=[/data/app/com.example-1/lib/arm, /data/app/com.example-1/base.apk!/lib/armeabi-v7a, /vendor/lib, /system/lib]]
at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:56)
at java.lang.ClassLoader.loadClass(ClassLoader.java:511)
at java.lang.ClassLoader.loadClass(ClassLoader.java:469)
at android.app.Instrumentation.newApplication(Instrumentation.java:1004)
at android.app.LoadedApk.makeApplication(LoadedApk.java:666)
at android.app.ActivityThread.handleBindApplication(ActivityThread.java:6289)
at android.app.ActivityThread.access$1800(ActivityThread.java:221)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1860)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:158)
at android.app.ActivityThread.main(ActivityThread.java:7224)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1230)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1120)
Suppressed: java.lang.ClassNotFoundException: com.example.TheApplication
at java.lang.Class.classForName(Native Method)
at java.lang.BootClassLoader.findClass(ClassLoader.java:781)
at java.lang.BootClassLoader.loadClass(ClassLoader.java:841)
at java.lang.ClassLoader.loadClass(ClassLoader.java:504)
... 12 more
Caused by: java.lang.NoClassDefFoundError: Class not found using the boot class loader; no stack trace available

Answer 1

转到文件 - ＆gt;设置 - ＆gt;实例运行的未选中即时运行复选框 - ＆gt;按应用 删除构建文件夹，清理并重建项目

此后我的问题得到解决

Answer 2

当我遇到类似的错误时，我发现我的遗失类是在另一个dex文件中。

我简单地添加了multidex-config.pro文件（将“com.sample.package”替换为你的包）

-keep class com.sample.package.** { *; }

并在我的build.gradle中添加了multiDexKeepProguard

buildTypes {
        debug {
            multiDexKeepProguard(new File("multidex-config.pro"))
            applicationIdSuffix ".debug"
            versionNameSuffix "-debug"
        }

        release {
            multiDexKeepProguard(new File("multidex-config.pro"))
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
            signingConfig signingConfigs.release
        }
    }

当gradle构建apk文件时，它会将类封装在一个dex文件中

希望有所帮助

Gradle：3.0.1“Build APK（s）”使用NoClassDefFoundError构建apk

2 个答案: