java.lang.RuntimeException: Unable to instantiate activity ComponentInfo

java.lang.RuntimeException: Unable to instantiate activity ComponentInfo

java.lang.runtimeexception unable to instantiate activity componentinfo android studio
java.lang.runtimeexception: unable to instantiate activity componentinfo unity
unable to instantiate activity componentinfo flutter
flutter java.lang.runtimeexception: unable to instantiate activity componentinfo
java.lang.runtimeexception: unable to start activity componentinfo
fatal exception: java lang runtimeexception unable to start activity componentinfo
xamarin android unable to instantiate activity componentinfo
unable to instantiate activity componentinfo has no zero argument constructor

I was trying to run a sample code While launching the application in the android 1.5 emulator , I got these errors.... Any one have some hint..?

ERROR from LogCat:

01-13 02:28:08.392: ERROR/AndroidRuntime(2888): FATAL EXCEPTION: main
01-13 02:28:08.392: ERROR/AndroidRuntime(2888): java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.s.android.test/com.s.android.test.MainActivity}: java.lang.ClassNotFoundException: com.s.android.test.MainActivity in loader dalvik.system.PathClassLoader[/data/app/com.s.android.test-2.apk]
01-13 02:28:08.392: ERROR/AndroidRuntime(2888):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1544)
01-13 02:28:08.392: ERROR/AndroidRuntime(2888):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1638)
01-13 02:28:08.392: ERROR/AndroidRuntime(2888):     at android.app.ActivityThread.access$1500(ActivityThread.java:117)
01-13 02:28:08.392: ERROR/AndroidRuntime(2888):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:928)
01-13 02:28:08.392: ERROR/AndroidRuntime(2888):     at android.os.Handler.dispatchMessage(Handler.java:99)
01-13 02:28:08.392: ERROR/AndroidRuntime(2888):     at android.os.Looper.loop(Looper.java:123)
01-13 02:28:08.392: ERROR/AndroidRuntime(2888):     at android.app.ActivityThread.main(ActivityThread.java:3647)
01-13 02:28:08.392: ERROR/AndroidRuntime(2888):     at java.lang.reflect.Method.invokeNative(Native Method)
01-13 02:28:08.392: ERROR/AndroidRuntime(2888):     at java.lang.reflect.Method.invoke(Method.java:507)
01-13 02:28:08.392: ERROR/AndroidRuntime(2888):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
01-13 02:28:08.392: ERROR/AndroidRuntime(2888):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
01-13 02:28:08.392: ERROR/AndroidRuntime(2888):     at dalvik.system.NativeStart.main(Native Method)
01-13 02:28:08.392: ERROR/AndroidRuntime(2888): Caused by: java.lang.ClassNotFoundException: com.s.android.test.MainActivity in loader dalvik.system.PathClassLoader[/data/app/com.s.android.test-2.apk]
01-13 02:28:08.392: ERROR/AndroidRuntime(2888):     at dalvik.system.PathClassLoader.findClass(PathClassLoader.java:240)
01-13 02:28:08.392: ERROR/AndroidRuntime(2888):     at java.lang.ClassLoader.loadClass(ClassLoader.java:551)
01-13 02:28:08.392: ERROR/AndroidRuntime(2888):     at java.lang.ClassLoader.loadClass(ClassLoader.java:511)
01-13 02:28:08.392: ERROR/AndroidRuntime(2888):     at android.app.Instrumentation.newActivity(Instrumentation.java:1021)
01-13 02:28:08.392: ERROR/AndroidRuntime(2888):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1536)
01-13 02:28:08.392: ERROR/AndroidRuntime(2888):     ... 11 more
01-13 02:28:08.407: WARN/ActivityManager(112):   Force finishing activity com.s.android.test/.MainActivity

Edit This error happens to most of the beginners, the thing is that you have to add all your activities in the Manifest file.


you may have some errors in your fields like

public class Search_costumer extends Activity {

// you may have some errors like this 
int x =3/0;
// I have error in initializing this variable too 
 MySimpleOnGestureListener mySimpleOnGestureListener =new MySimpleOnGestureListener();

public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
}
}

so my advice is to perform all initialization in onCreate method not directly in your fields

solve like that

public class Search_costumer extends Activity {

public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

// you may have some errors like this 
int x =3/0;
// I have error in initializing this variable too 
 MySimpleOnGestureListener mySimpleOnGestureListener =new MySimpleOnGestureListener();
}
}

How to resolve a Java.lang.RuntimeException: Unable to instantiate , How do I resolve a Java.lang.RuntimeException: Unable to instantiate activity ComponentInfo error? Ad by DuckDuckGo. java.lang.RuntimeException: Unable to instantiate activity ComponentInfo in a New Project - Android 3 Canary 7 0 (TensorflowLite/Android) Unable to instantiate activity ComponentInfo


This can also happen if you have two projects with the same package name and you ran one of them before the other so I guess it confuses Eclipse. For me this happened when I copied an Android tutorial in eclipse in the same workspace and left the package names the same but added ActionBarSherlock (ABS) to it, e.g.

 package="com.example.android.whatever"

So in my AndroidManifest.xml file, both the tutorial project that was in my workspace and the copied tutorial project both had as the package string:

<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.android.whatever"

    ....
</manifest>

Just change the package name by refactoring (In eclipse, right click on package in Package Explorer tab > select Refractor > select Rename...) and then changing it in your AndroidManifest.xml file and anywhere else you need to (e.g. like all your .java files)

Java.Lang.RuntimeException: Unable to instantiate activity , java.lang.RuntimeException: Unable to instantiate activity ComponentInfo. Problem on Java Build Path again! similar to the case of  java.lang.RuntimeException: Unable to instantiate activity ComponentInfo 1 Android — SurfaceView assigned from findViewById(R…) won't allow access to custom fields


Also if you're retrieving something from intent of another activity using getIntent in the current activity and setting those retrieved data before/above onCreate then this exception is thrown.

For eg. if i retrieve a string like this

final String slot1 = getIntent().getExtras().getString("Slot1");

and put this line of code before/above onCreate then this exception is thrown.

Android, java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{…}: java.lang.ClassNotFoundException: Didn't find class. There is another way to get an java.lang.RuntimeException: Unable to instantiate activity ComponentInfo exception and that is the activity that you are trying to start is abstract. I made this stupid mistake once and its very easy to overlook.


In my case I had two version of "android-support-v4.jar" references in the project. After resolving this (removed additional/incorrect reference) solved the issue.

Unable to instantiate activity ComponentInfo · Issue #7625 , Estou executando o projeto em meu celular, porem apresenta o seguinte erro de exceção: java.lang.RuntimeException: Unable to instantiate activity ComponentInfo MainActivity: public class MainActi


Most the time If Activity name changed reflected all over the project except the AndroidManifest.xml file.

You just need to Add the name in manifest manually.

<activity
android:name="Activity_Class_Name"
android:label="@string/app_name">
</activity>

Android Webpack- .RuntimeException: Unable to instantiate activity , Do you get this same behavior with the "Hello Admob" sample app? It helps to try the same process using a known good reference app, so you can determine if it is something with the build system, the plugins, or your code.


Unable to instantiate activity, Thank you for taking the time to report this issue. Unfortunately, we're unable to follow up on it right now. The reason is that we've created too many feedback channels to track and solve issues as effectively as we want. That's why we've decided to do the following: On February 15, 2019, we'll be archiving this repository, including all issues.


Dismiss Join GitHub today. GitHub is home to over 40 million developers working together to host and review code, manage projects, and build software together.


Unity ID. A Unity ID allows you to buy and/or subscribe to Unity products and services, shop in the Asset Store and participate in the Unity community.