我得到与 java.lang.ClassNotFoundException 相同的错误:没有找到类,但仅在版本 4.4 中
尝试了各种方法都无法解决
有办法解决这个问题吗?
java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.sinwho.timer/com.sinwho.timer.MainActivity}: java.lang.ClassNotFoundException: Didn't find class "com.sinwho.timer.MainActivity" on path: DexPathList[[zip file "/data/app/com.sinwho.timer-1.apk"],nativeLibraryDirectories=[/data/app-lib/com.sinwho.timer-1, /vendor/lib, /system/lib]]
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2131)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2255)
at android.app.ActivityThread.access$800(ActivityThread.java:142)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1203)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:136)
at android.app.ActivityThread.main(ActivityThread.java:5118)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:790)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:606)
at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.ClassNotFoundException: Didn't find class "com.sinwho.timer.MainActivity" on path: DexPathList[[zip file "/data/app/com.sinwho.timer-1.apk"],nativeLibraryDirectories=[/data/app-lib/com.sinwho.timer-1, /vendor/lib, /system/lib]]
at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:56)
at java.lang.ClassLoader.loadClass(ClassLoader.java:497)
at java.lang.ClassLoader.loadClass(ClassLoader.java:457)
at android.app.Instrumentation.newActivity(Instrumentation.java:1061)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2122)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2255)
at android.app.ActivityThread.access$800(ActivityThread.java:142)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1203)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:136)
at android.app.ActivityThread.main(ActivityThread.java:5118)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:790)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:606)
at dalvik.system.NativeStart.main(Native Method)
最佳答案
在 android 4.4 中,我们面临以下问题:在主 DEX 文件中声明所需的类。这里提到:( https://developer.android.com/studio/build/multidex#keep )
从 Gradle 2.2.0(2016 年 9 月发布)开始,您可以使用 multiDexKeepFile api
android {
buildTypes {
debug {
...
multiDexEnabled true
multiDexKeepFile file('multidex_keep_file.txt')
}
}
}
其中 multidex_keep_file.txt 是每行具有单个类的文件,需要显式添加到主 dex
com/test/TestClass.class
com/test/TestClass.class
另一种方法是:使用multiDexKeepProguard来保留整个包
-keep class com.test.** { *; }
关于android ClassNotFoundException : Didn't find class error,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/57815313/