无法实例化4.3和4.4中的活动，但可能在> 5.0中

Question

我已经实现了一个运行在Android 4.3以上的应用程序.. 经过很多更改后，它突然停止工作< Android 5.0，但工作在Android 5.0以上。 。 下面你可以看到错误消息：

 E/AndroidRuntime: FATAL EXCEPTION: main 
       java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.chickchat.chickchat/com.chickchat.chickchat.MainActivity}: java.lang.ClassNotFoundException: Didn't find class "com.chickchat.chickchat.MainActivity" on path: DexPathList[[zip file "/data/app/com.chickchat.chickchat-1.apk"],nativeLibraryDirectories=[/data/app-lib/com.chickchat.chickchat-1, /vendor/lib, /system/lib]] 
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2137) 
        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2261) 
        at android.app.ActivityThread.access$600(ActivityThread.java:141) 
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1256) 
        at android.os.Handler.dispatchMessage(Handler.java:99) 
        at android.os.Looper.loop(Looper.java:137) 
        at android.app.ActivityThread.main(ActivityThread.java:5103) 
        at java.lang.reflect.Method.invokeNative(Native Method) 
        at java.lang.reflect.Method.invoke(Method.java:525) 
        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737) 
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553) 
        at dalvik.system.NativeStart.main(Native Method) 
       Caused by: java.lang.ClassNotFoundException: Didn't find class "com.chickchat.chickchat.MainActivity" on path: DexPathList[[zip file "/data/app/com.chickchat.chickchat-1.apk"],nativeLibraryDirectories=[/data/app-lib/com.chickchat.chickchat-1, /vendor/lib, /system/lib]] 
        at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:53) 
        at java.lang.ClassLoader.loadClass(ClassLoader.java:501) 
        at java.lang.ClassLoader.loadClass(ClassLoader.java:461) 
        at android.app.Instrumentation.newActivity(Instrumentation.java:1061) 
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2128) 
        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2261)  
        at android.app.ActivityThread.access$600(ActivityThread.java:141)  
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1256)  
        at android.os.Handler.dispatchMessage(Handler.java:99)  
        at android.os.Looper.loop(Looper.java:137)  
        at android.app.ActivityThread.main(ActivityThread.java:5103)  
        at java.lang.reflect.Method.invokeNative(Native Method)  
        at java.lang.reflect.Method.invoke(Method.java:525)  
        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737)  
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)  
        at dalvik.system.NativeStart.main(Native Method)  

清单

<?xml version="1.0" encoding="utf-8"?> 
<manifest xmlns:android="http://schemas.android.com/apk/res/android" 
    package="com.chickchat.chickchat" > 

    <uses-permission android:name="android.permission.INTERNET" /> 
    <uses-permission android:name="android.permission.VIBRATE"/> 
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" /> 
    <uses-permission android:name="android.permission.CHANGE_CONFIGURATION" /> 
    <uses-permission android:name="com.android.alarm.permission.SET_ALARM"/> 

    <application 
     <activity 
      android:name=".MainActivity" 

android { 
compileSdkVersion 26 
buildToolsVersion '25.0.3' 

Gradle.File

defaultConfig { 
    applicationId "com.chickchat.chickchat" 
    // Note: reducing to sdk 16 when removing UIAutomation 
    minSdkVersion 18 
    targetSdkVersion 26 
    versionCode 1 
    testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner" 
    multiDexEnabled true 
} 

dependencies { 
compile 'com.android.support:multidex:1.0.1' 
} 

虽然有很多的计算器上我能找到我的问题的解决方案与这种类型的异常问题...

Answer 1

这似乎是与multidex一个问题。您的Application课程是否从MultiDexApplication延伸或者是否实施必要的MultiDex.install(this)操作。

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