android程序报找不到Application

事件原委：

给测试发了程序，反馈装上就闪退，我这边装的没事，又发了一次，测试还是反馈闪退，心中一万个。。。

把发给测试的程序通过adb来安装，发现确实闪退，通过android  studio  安装没有问题，这你妹的。。。

错误信息：

FATAL EXCEPTION: mainProcess: com.example, PID: 21084java.lang.RuntimeException: Unable to instantiate application com.example.MyApp: java.lang.ClassNotFoundException: Didn't find class "com.example.MyApp" on path: DexPathList[[zip file "/data/app/com.example-1/base.apk"],nativeLibraryDirectories=[/data/app/com.example-1/lib/arm, /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.MyApp" on path: DexPathList[[zip file "/data/app/com.example-1/base.apk"],nativeLibraryDirectories=[/data/app/com.example-1/lib/arm, /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.MyAppat 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 moreCaused by: java.lang.NoClassDefFoundError: Class not found using the boot class loader; no stack trace available

把依赖库、各种clean、rebuild不行。百度查出来的跟问题的相关性也不大，最后在stackoverflow上找到了解决办法：

Android Studio->Preferences->Instant Run, uncheck "Enable Instance Run"

将Enable Instance Run  复选框去掉勾选

修改后好了，折腾了一天，之前发程序也没出问题，具体什么问题，没有时间再深入去探究，先记录下如何修改应急！！！

真TM坑

附上链接：

https://stackoverflow.com/questions/43273878/unable-to-instantiate-application-java-lang-classnotfoundexception

点击打开链接