Session app Error Launching activity

Question

After the Android Studio 2 0 update while the gradle build  finishes I get this   Session  app   Error Launching activity   It prevents the app from starting but it s installed in my emulator  This is what comes up in the Run tab    Unexpected error while executing  am start -n  quot com example user ypologismosmoriwn com example user ypologismosmoriwn MainActivity quot  -a android intent action MAIN -c android intent category LAUNCHER Error while Launching activity  Here is the code  package com example user ypologismosmoriwn   import android support v7 app AppCompatActivity  import android os Bundle   public class MainActivity extends AppCompatActivity         Override     protected void onCreate Bundle savedInstanceState            super onCreate savedInstanceState           setContentView R layout activity main            It s just an empty Activity nothing added and the XML code is just a Relative Layout with 4 Texts and 3 Check Boxes This is the logcat i am getting Thanks anyone who is willing to help

User · Answer

Clearing the device data worked for me     Close your emulator  Go to AVD Manager  Under  Actions  select  Wipe Data   for the device your intend to use   Then run your app again   Hope this helps

User · Answer

I got the same problem and fixed it with this answer     But this problem was created by myself  as I tried to debug my unit tests  Therefore I had to uncheck the Use in-process build option of the AS Settings in Build  Execution  Deployment   Compiler   So in my case it works  if I disabled instant run  But it also works  as I enabled instant run and also the Use in-process build option

User · Answer

it occured when I changed the applicationId in app gradle file  It works for me after I sync gradle

User · Answer

I ve fixed the issue using this solution If you are running the application in USB device then close all the virtual device like   genymotion   virtual machine

User · Answer

I ve fixed the issue  on my Anroid watch Moto 360  by uninstalling the app before installing from AS

User · Answer

I had same problem  I was using AVD with arm processor image and received this same message  The only way for me to make Android Studio 2 1 2 runs the app with instant run was change to an X86 processor image  The error was gone and   until this moment  I think the emulator works faster than ARM emulated  My workstation configuration is Intel I5  6Gb RAM  Maybe this helps until next fix

User · Answer

Sometimes when you uninstall the application from android device it does not get uninstalled completely  It goes to disabled state  To fix this  Go to Settings -  Apps -  Disabled Apps -  Select your app and uninstall    Then go to android studio and run the app  The isssue is resolved

User · Answer

I tried  clean  amp  rebuild project and Invalidate Cache  amp  Restart also manually removed  gradle and  idea folders  but that didn t solved the issue   I have 3 user acounts in my phone  So  I didn t select Uninstall for all users  and  it only uninstall my app from first user account  but it was still there in guest and second user account    So  I removed it from rest of the accounts and it solved my issue

User · Answer

Same issue  but for me problem was that Android Studio couldn t find my Default Activity  When I specified the intent filter to catch the MAIN action intent  I didn t specify the LAUNCHER category  and that caused the  Error Launching activity  issue        lt intent-filter gt           lt action android name  android intent action MAIN    gt           lt category android name  android intent category LAUNCHER    gt    lt -- forgot      lt  intent-filter gt

User · Answer

Try reinstalling the app  this solved the error for me  The trick was that  I uninstalled my app  but Android didn t truly uninstall it  On my phone  there is a guest user  my sister uses it sometimes   If you uninstall the app from your main user  it will still be available on the phone  but only for the guest user  It looks like Android Studio can t handle this case  I guess it detects that the app is installed  so it will not be reinstalled again for the current user  hence the OS can t access and launch the activity  Nice bug  I ll report it

User · Answer

This is issue with 2 0  studio  Issue 206036   No local changes  not deploying APK  I found the nice workaround here just add -r flag here in edit configurations and also disabling instant    Waiting to get Instant run Feature run smoothly soon with no type 3 error more

User · Answer

Just disable Instant Run   Go To File  gt  gt  Settings  gt  gt  Build  Execute  Deployment  gt  gt  Instant Run   Uncheck The Box that says Enable instant run to hot swap code resource changes on deploy  Re-run the emulator

User · Answer

Disable  instant run   you can go to Preference Dialog   May be Setting dialog on Windows   then select Build  Execution  Deployment   Instant Run  and uncheck all the checkbox to disable Instant Run   And Reboot your Device this should make the thing work    instant run has a bug in Android studio 2  This should do the magic

User · Answer

Just Run -- gt  clean and rerun   In my case it helps   Prompts automatically like following message     would you uninstall already installed activity with same name   if activity is already installed first uninstall it and make project ready after installing app

User · Answer

My Answer is specifically for Redmi Mi Phone users  I faced this issue multiple times   Sometimes we uninstall the app but it is not completely uninstalled but app will not display on screen and also it will not be listed in Settings -  Apps   After checking multiple answers  What worked for me is below command     Go to Android Studio and click on Terminal tab in bottom of Android Studio  Connect your device  once adb detects your device  Run this   command and try again to Run your application  Hope it will help    adb uninstall com shyam smsapp   com shyam smsapp replace with your application package name

User · Answer

I had the same error as in the headline  after I changed the version name and version code in the gradle  the sync happened and then it worked   so maybe even only sync can help sometimes

User · Answer

I also faced this issue after I updated to AS2 0  I found that it is because of the instant run enabled  So my solution is to disable the  instant run   and it worked  To disable  instant run   you can go to Preference Dialog   May be Setting dialog on Windows   then select Build  Execution  Deployment   Instant Run  and uncheck all the checkbox to disable Instant Run   This is my temporary solution and it may help you  Later  I ll find a better way to this issue     update by 2016 06 06  A better solution instead of disabling instant run  Remove the  idea folder and  gradle folder  then click button Sync Project with Gradle Files  or through the menu File -  Sync Project with Gradle Files   after this process finished  you are able to run your app as normal   Good Luck

User · Answer

I ve had same issue  rebuilding project clears the error for me     build -  rebuild project -  run

User · Answer

None of the existing answers helped me as I had the same app installed in my other profile  Solution -    Switch to the other profile Uninstall the app from 2nd profile Switch back

User · Answer

I  was facing the same problem in android studio 2 1 2  but worked after selecting Build -   Clean Project or alternatively Run -   Clean and Rerun

User · Answer

I tried the above answer  However  none of the solutiond worked for me  I changed the emulator to USB and the code is running on the USB target device prefectly

User · Answer

Just run adb uninstall  lt package name gt  in your terminal  and reinstall the app again    Hope it helps

User · Answer

I had this error because of my stupidity  In the manifest xml I have wrongly declared two Activity as Launcher  Make sure you have only one activity as Launcher        lt activity android name   MainActivity  gt           lt intent-filter gt               lt action android name  android intent action MAIN    gt               lt category android name  android intent category LAUNCHER    gt           lt  intent-filter gt       lt  activity gt       lt activity android name   WelcomeActivity  gt           lt intent-filter gt               lt action android name  android intent action MAIN    gt               lt category android name  android intent category DEFAULT    gt           lt  intent-filter gt       lt  activity gt

User · Answer

I spent a whole lot of hours on this exact issue   The  instant run  fix was a total fail   And I wasn t missing the android intent category LAUNCHER  I removed all applicable Android Studio and SDK code and re-installed   Still a no go     Ultimately I think my issue was marginal hardware   I m running on a laptop with a AMD A6-4400M processor  There is no hardware acceleration   virtualization tools available   I was just running the standard Android Studio   Google emulator   It was painfully slow  and although I was eventually able to see the emulator and interact with it  I was never able to connect the emulator to Android Studio to upload APK s    But I did discover an awesome fix     Remove all Android Virtual Devices and install the GenyMotion Emulator  with VirtualBox     I ve tried GenyMotion emulators before  with a Linux  and it didn t make much difference in load up speed   On this Windows 10 machine it works exceptionally well   Its pretty quick  easily connects to Android Studio and works well deploying my apps    GenyMotion offers one personal use device at no cost   Kudos to the GenyMotion team    Answer provided here in case anybody else gets stuck with this error  possibly with this root cause

User · Answer

All answers did not work for me This error raised when I was trying to rename the app package I have ended up creating a new project with the new package name and move my files to the new one

User · Answer

I tried all suggested answers  I found out this is a hardware issue on Android N phone with studio 2 3 version  App launches fine on phones below version 7

User · Answer

I got the same error  This issue was caused by uninstalling the app from the device  uninstalled from only 1 user   Solved by logging into the other user and uninstall the app from there   and it solved

User · Answer

The only one best Answer is to run uninstall command from adb and install the app again   C  Users YourUser AppData Local Android sdk platform-tools adb uninstall applicationId   applicationId  from gradle module file

User · Answer

I did all suggestions above  but they didn t work  I rebuilt the project  uninstalled the app from my real device  unplugged USB  then I run Android Studio and run the app on my real device and the issue was gone   Hope this helps

User · Answer

For me the problem was that the app I was trying to launch was already installed under a different user account on my phone  I saw this when I went to Settings- apps looking to uninstall it  I switched to the other user  uninstalled it  came back to the original user  and was able to install and launch the app from Android Studio with no more problems

User · Answer

Uninstall App on your real device or emulator  Then Run again  It s worked for me  I used Android Studio 2 3 3

User · Answer

If you are using Android 7 0 and above it is likely that the app was installed in two places  Guest and Admin  and you only Uninstalled it for only one user and that is causing problems    To solve that  go to   Settings -  Apps  amp  Notifications -  See all Apps -  find the app you are trying to install      Then click the menu on the top right corner and select Uninstall for all users    Run Your App from Android Studio it should work

User · Answer

Adb also throws this error if applicationId  package of launching activity or module name contains error substring

User · Answer

OK already so many possible solutions for this problem  if none of those works then try this   I faced this problem when I first uninstalled my app then tried reinstalling from ADB  But then after trying these many solutions  I realized that uninstalling app nowadays does not really uninstall it  It just disables it for few days so that it can be enabled in case you change your mind    Now I am not sure whether its done by LG or Native Android Nougat   I just went in Settings-  apps-  my-app and uninstalled it completely  After that from Android studio I am able to install the app again properly without this error

[android] Session 'app': Error Launching activity

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