Unable to instantiate application com.android.tools.fd.runtime.BootstrapApplication ?Android

Question

I updated my Android Studio to version 2.0. But I had a problem, I don't know why?

The important error info:

Unable to instantiate application com.android.tools.fd.runtime.BootstrapApplication: java.lang.IllegalStateException: java.lang.ClassNotFoundException: com.eallcn.rentagent.MyDebugEallApplication

I searched a long time, But I didn't find the right answer you can see the link

At the same time when I click File->Project structure It shows this error:

Is there any problem somewhere in the libs? When gradle build the program the libs didn't load completely for current program. Is there any problem with Android Studio version 2.0?

When I use Android studio 1.4.0 to build and run the program. It works fine for me! But when I use the Android Studio 2.0, the problem shows up!

Why? Could you help me, please?

Here is detailed error log:

11-28 11:57:00.489 19890-19890/com.eallcn.rentagent.debug E/AndroidRuntime: FATAL EXCEPTION: main Process: com.eallcn.rentagent.debug, PID: 19890 java.lang.RuntimeException: Unable to instantiate application com.android.tools.fd.runtime.BootstrapApplication: java.lang.IllegalStateException: java.lang.ClassNotFoundException: com.eallcn.rentagent.MyDebugEallApplication at android.app.LoadedApk.makeApplication(LoadedApk.java:537) at android.app.ActivityThread.handleBindApplication(ActivityThread.java:4586) at android.app.ActivityThread.access$1800(ActivityThread.java:139)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1316)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:136)
at android.app.ActivityThread.main(ActivityThread.java:5314)
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:864) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:680)
at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.IllegalStateException: java.lang.ClassNotFoundException: com.eallcn.rentagent.MyDebugEallApplication
at com.android.tools.fd.runtime.BootstrapApplication.createRealApplication(BootstrapApplication.java:167) at com.android.tools.fd.runtime.BootstrapApplication.attachBaseContext(BootstrapApplication.java:179) at android.app.Application.attach(Application.java:194)
at android.app.Instrumentation.newApplication(Instrumentation.java:992)
at android.app.Instrumentation.newApplication(Instrumentation.java:976)
at android.app.LoadedApk.makeApplication(LoadedApk.java:532)
at android.app.ActivityThread.handleBindApplication(ActivityThread.java:4586)? at android.app.ActivityThread.access$1800(ActivityThread.java:139)? at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1316)? at android.os.Handler.dispatchMessage(Handler.java:102)? at android.os.Looper.loop(Looper.java:136)? at android.app.ActivityThread.main(ActivityThread.java:5314)? 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:864)? at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:680)? at dalvik.system.NativeStart.main(Native Method)? Caused by: java.lang.ClassNotFoundException: com.eallcn.rentagent.MyDebugEallApplication at java.lang.Class.classForName(Native Method) at java.lang.Class.forName(Class.java:251) at java.lang.Class.forName(Class.java:216) at com.android.tools.fd.runtime.BootstrapApplication.createRealApplication(BootstrapApplication.java:155) at com.android.tools.fd.runtime.BootstrapApplication.attachBaseContext(BootstrapApplication.java:179)? at android.app.Application.attach(Application.java:194)? at android.app.Instrumentation.newApplication(Instrumentation.java:992)? at android.app.Instrumentation.newApplication(Instrumentation.java:976)? at android.app.LoadedApk.makeApplication(LoadedApk.java:532)? at android.app.ActivityThread.handleBindApplication(ActivityThread.java:4586)? at android.app.ActivityThread.access$1800(ActivityThread.java:139)? at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1316)? at android.os.Handler.dispatchMessage(Handler.java:102)? at android.os.Looper.loop(Looper.java:136)? at android.app.ActivityThread.main(ActivityThread.java:5314)? 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:864)? at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:680)? at dalvik.system.NativeStart.main(Native Method)? Caused by: java.lang.NoClassDefFoundError: com/eallcn/rentagent/MyDebugEallApplication at java.lang.Class.classForName(Native Method)? at java.lang.Class.forName(Class.java:251)? at java.lang.Class.forName(Class.java:216)? at com.android.tools.fd.runtime.BootstrapApplication.createRealApplication(BootstrapApplication.java:155)? at com.android.tools.fd.runtime.BootstrapApplication.attachBaseContext(BootstrapApplication.java:179)? at android.app.Application.attach(Application.java:194)? at android.app.Instrumentation.newApplication(Instrumentation.java:992)? at android.app.Instrumentation.newApplication(Instrumentation.java:976)? at android.app.LoadedApk.makeApplication(LoadedApk.java:532)? at android.app.ActivityThread.handleBindApplication(ActivityThread.java:4586)? at android.app.ActivityThread.access$1800(ActivityThread.java:139)? at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1316)? at android.os.Handler.dispatchMessage(Handler.java:102)? at android.os.Looper.loop(Looper.java:136)? at android.app.ActivityThread.main(ActivityThread.java:5314)? 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:864)? at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:680)?

Answer 1

Disable the Instant Run option in Android Studio. Instructions are in the Android Studio Instant Run documentation.

Instant Run tries to do hot swapping of your code; this causes the application class to be moved.

To disable Instant Run Go to File --> Settings--> Build,Execution,Deployment -->Instant Run ---> uncheck "Enable instant run"