android - 无法在应用程序中引用库模块的 Activity

Question

我使用的是 Android Studio 2.3.3，Android Plugin for Gradle 2.3.3 .

请参阅我的示例项目，https://github.com/Uni-/AndroidModuleTest .在此项目中，有两个示例模块(作为 Android Studio 名称)，app 和 library。

library 有 com.example.test.myapplication.MainActivity 类，它在 app< 的 AndroidManifest.xml 中被引用/强>。该应用程序编译良好，但在启动时崩溃:

10-31 22:20:55.031 30084-30084/? I/zygote64: Late-enabling -Xcheck:jni
10-31 22:20:55.312 30084-30084/? I/InstantRun: starting instant run server: is main process
10-31 22:20:55.325 30084-30084/? D/AndroidRuntime: Shutting down VM
10-31 22:20:55.327 30084-30084/? E/AndroidRuntime: FATAL EXCEPTION: main
                                                   Process: com.example.test.myapplication, PID: 30084
                                                   java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.example.test.myapplication/com.example.test.myapplication.MainActivity}: java.lang.ClassNotFoundException: Didn't find class "com.example.test.myapplication.MainActivity" on path: DexPathList[[zip file "/data/app/com.example.test.myapplication-dsBQ8b1LFh9WtKzvdfrLYg==/base.apk", zip file "/data/app/com.example.test.myapplication-dsBQ8b1LFh9WtKzvdfrLYg==/split_lib_dependencies_apk.apk", zip file "/data/app/com.example.test.myapplication-dsBQ8b1LFh9WtKzvdfrLYg==/split_lib_slice_0_apk.apk", zip file "/data/app/com.example.test.myapplication-dsBQ8b1LFh9WtKzvdfrLYg==/split_lib_slice_1_apk.apk", zip file "/data/app/com.example.test.myapplication-dsBQ8b1LFh9WtKzvdfrLYg==/split_lib_slice_2_apk.apk", zip file "/data/app/com.example.test.myapplication-dsBQ8b1LFh9WtKzvdfrLYg==/split_lib_slice_3_apk.apk", zip file "/data/app/com.example.test.myapplication-dsBQ8b1LFh9WtKzvdfrLYg==/split_lib_slice_4_apk.apk", zip file "/data/app/com.example.test.myapplication-dsBQ8b1LFh9WtKzvdfrLYg==/split_lib_slice_5_apk.apk", zip file "/data/app/com.example.test.myapplication-dsBQ8b1LFh9WtKzvdfrLYg==/split_lib_slice_6_apk.apk", zip file "/data/app/com.example.test.myapplication-dsBQ8b1LFh9WtKzvdfrLYg==/split_lib_slice_7_apk.apk", zip file "/data/app/com.example.test.myapplication-dsBQ8b1LFh9WtKzvdfrLYg==/split_lib_slice_8_apk.apk", zip file "/data/app/com.example.test.myapplication-dsBQ8b1LFh9WtKzvdfrLYg==/split_lib_slice_9_apk.apk"],nativeLibraryDirectories=[/data/app/com.example.test.myapplication-dsBQ8b1LFh9WtKzvdfrLYg==/lib/arm64, /system/lib64, /vendor/lib64]]
                                                       at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2718)
                                                       at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2892)
                                                       at android.app.ActivityThread.-wrap11(Unknown Source:0)
                                                       at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1593)
                                                       at android.os.Handler.dispatchMessage(Handler.java:105)
                                                       at android.os.Looper.loop(Looper.java:164)
                                                       at android.app.ActivityThread.main(ActivityThread.java:6541)
                                                       at java.lang.reflect.Method.invoke(Native Method)
                                                       at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:240)
                                                       at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:767)
                                                    Caused by: java.lang.ClassNotFoundException: Didn't find class "com.example.test.myapplication.MainActivity" on path: DexPathList[[zip file "/data/app/com.example.test.myapplication-dsBQ8b1LFh9WtKzvdfrLYg==/base.apk", zip file "/data/app/com.example.test.myapplication-dsBQ8b1LFh9WtKzvdfrLYg==/split_lib_dependencies_apk.apk", zip file "/data/app/com.example.test.myapplication-dsBQ8b1LFh9WtKzvdfrLYg==/split_lib_slice_0_apk.apk", zip file "/data/app/com.example.test.myapplication-dsBQ8b1LFh9WtKzvdfrLYg==/split_lib_slice_1_apk.apk", zip file "/data/app/com.example.test.myapplication-dsBQ8b1LFh9WtKzvdfrLYg==/split_lib_slice_2_apk.apk", zip file "/data/app/com.example.test.myapplication-dsBQ8b1LFh9WtKzvdfrLYg==/split_lib_slice_3_apk.apk", zip file "/data/app/com.example.test.myapplication-dsBQ8b1LFh9WtKzvdfrLYg==/split_lib_slice_4_apk.apk", zip file "/data/app/com.example.test.myapplication-dsBQ8b1LFh9WtKzvdfrLYg==/split_lib_slice_5_apk.apk", zip file "/data/app/com.example.test.myapplication-dsBQ8b1LFh9WtKzvdfrLYg==/split_lib_slice_6_apk.apk", zip file "/data/app/com.example.test.myapplication-dsBQ8b1LFh9WtKzvdfrLYg==/split_lib_slice_7_apk.apk", zip file "/data/app/com.example.test.myapplication-dsBQ8b1LFh9WtKzvdfrLYg==/split_lib_slice_8_apk.apk", zip file "/data/app/com.example.test.myapplication-dsBQ8b1LFh9WtKzvdfrLYg==/split_lib_slice_9_apk.apk"],nativeLibraryDirectories=[/data/app/com.example.test.myapplication-dsBQ8b1LFh9WtKzvdfrLYg==/lib/arm64, /system/lib64, /vendor/lib64]]
                                                       at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:93)
                                                       at java.lang.ClassLoader.loadClass(ClassLoader.java:379)
10-31 22:20:55.328 30084-30084/? E/AndroidRuntime:     at java.lang.ClassLoader.loadClass(ClassLoader.java:312)
                                                       at android.app.Instrumentation.newActivity(Instrumentation.java:1173)
                                                       at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2708)
                                                        ... 9 more
10-31 22:21:00.439 30084-30093/com.example.test.myapplication I/zygote64: Waiting for a blocking GC ObjectsAllocated
10-31 22:21:00.537 30084-30093/com.example.test.myapplication I/zygote64: WaitForGcToComplete blocked for 97.913ms for cause ObjectsAllocated

根据日志，MainActivity 类似乎不存在于应用程序 Artifact 中。

事实上，app 的build.gradle 包含这些行:

debugCompile project(path: ':library', configuration: 'debugCompile')
releaseCompile project(path: ':library', configuration: 'releaseCompile')

当我用下面的一行替换这些行时，错误就修复了:

compile project(':library')

然而，这不是我想要的。我的真实项目中有各种产品风格和自定义构建类型，所以只需一个编译，甚至是 implementation in 3.0 , 无法解决。

我在示例项目中做错了什么？

Answer 1

我自己解决了这个问题。

关键是在library的build.gradle中设置publishNonDefault true。

此外，上下文相关性应声明为:

debugCompile project(path: ':library', configuration: 'debug')
releaseCompile project(path: ':library', configuration: 'release')

修复于 151f6e4 .谢谢。