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

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)  > at dalvik.system.NativeStart.main(Native Method)  > Caused by: java.lang.ClassNotFoundException: Didn't find class > "com.eallcn.rentagent.MyDebugEallApplication" on path: > DexPathList[[zip file > "/data/app/com.eallcn.rentagent.debug-1.apk"],nativeLibraryDirectories=[/data/app-lib/com.eallcn.rentagent.debug-1, > /vendor/lib, /system/lib, /data/datalib]] > 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 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)

 

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"

I had the same error after trying to use the 2.0.

I solved it by reverting some gradle changes:

1/3:

Changing:

classpath 'com.android.tools.build:gradle:2.0.0-alpha1'

By:

classpath 'com.android.tools.build:gradle:1.2.3'

2/3:

Changing:

buildToolsVersion '23.0.2'

By:

buildToolsVersion "21.1.2"

3/3: (in <project folder>/.idea/gradle.xml)

And:

<option name="gradleHome" value="$APPLICATION_HOME_DIR$/gradle/gradle-2.8" />

By:

<option name="gradleHome" value="$APPLICATION_HOME_DIR$/gradle/gradle-2.4" />

I don't know what line is exactly the origin of the error, but with this three changes it was solved.

Hope that it helps you :)

I had the same error.

I solved it by cleaning the project ( Build > Clean Project )

Just go to Android Studio menu - Build --> Rebuild Project.

I was able to get rid of this error by updating gradle-wrapper.properties to gradle-2.14.1-all, and cleaning/rebuilding the project. Then it ran fine. No other changes were needed (as those suggested in the above answer)...

Changing to

classpath 'com.android.tools.build:gradle:2.0.0-alpha6'

fixed issue

I also got this error with Android 2.0 in stable channel.

What I did?

• I had an older version of the app already installed on the device (which was built using older version of the Studio) which I was trying to replace by running the newer app on device.
  I just uninstalled the older version completely before running the new app and the trick worked.

Just for those who want to update classPath with latest gradle plugin version, Where to find latest plugin version?

Check in http://tools.android.com/tech-docs/new-build-system and update your classPath. Latest one at current is

 classpath 'com.android.tools.build:gradle:2.0.0'.

Always try to build with latest plugin version.

If you don't want to disable Instant Run, just do a project clean and rerun.

Change classpath 'com.android.tools.build:gradle:2.1.2' to classpath 'com.android.tools.build:gradle:2.1.0' fixes my problem.

I also faced the same problem and i solved it. In my case it was due to a mistake in global class ( Throughout Application context class ) , my mistake was in AndroidManifest.xml i have declared the Application class VolleyHelper as :-

 <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:supportsRtl="true" android:name=".VolleyHelper"
        android:theme="@style/AppTheme"> 

but in VolleyHelper.java i don't have a Default constructor . So i added default constructor in VolleyHelper.java ( Application Class ) .

you can also add this into your gradle to prevent making dex on debug

debug {
    // dev utilizes minSDKVersion = 21 to allow the Android gradle plugin
    // to pre-dex each module and produce an APK that can be tested on
    // Android Lollipop without time consuming dex merging processes.
    minSdkVersion 21
}

This error will happen when you add a blank activity with .java file. So to solve this error 1st you have to Build the project again. Then run it. Solved Thank You.

In some Android devices with versions before OS 5.0 we get the error message:

> Caused by: java.lang.ClassNotFoundException: Didn't find class > "com.android.tools.fd.runtime.BootstrapApplication

We must disable "Instant Run".

Go to File > Settings > Built, Execution, Deployment > Instant Run

Then disable the option Enable Instant Run to hot swap code.

I just needed to reboot my device. Tried everything else first unfortunately so wasted hours.

If you are sharing your app then another solution is

go to Android Studio --> Build --> Build APK

A pop up will come with APK generated successfully. Show in Explorer will get you to the generated apk folder.

No need to disable "instant run".

1. go to project's root using File Explorer
2. Finish Android Studio(AS)
3. delete(relocate somewhere) ".gradle" 's folder content
   (to clean some cashs and old artifacts)
4. in res folder clean off all inappropriate files
5. launch the AS again
6. in module's build.gradle set "buildTypes { debug {minifyEnabled true" to false
   (that looks like an error was in my proguard file, kek)

Sync, compile and run the app again :/

I just update Android Studio to the last version (2.0 Beta 5). It changes itself to classpath 'com.android.tools.build:gradle:2.0.0-beta5' and works like a charm.