com.android.ddmlib.InstallException: Failed to establish session react-native

Question

I am trying to run react-native android app in my nexus5 emulator

adb devices
List of devices attached
emulator-5554   device

started pack

Answer 1

step :1 run(kill all adb)

 adb kill-server

step 2:list all connected devices(get your emulator id)

adb devices 

step 3:(replace ID to listed id from step2)

react-native run-android --deviceId ID

Note: make sure your previous app uninstalled in your emulator or physical device

Answer 2

For Mi devices

for those who suffer from this, try what lironess mentions in a Github Comment

1. enable developer mode - In your phone, go to Settings, About phone and click on MIUI version 7 times. You’ll see a pop up which says you are a developer now.
2. Go back to Settings, Additional settings, Developer options and enable USB Debugging.
3. Connect your phone to your PC/Mac and on the phone authorize your computer
4. go back to Developer options, scroll down to find Turn on MIUI optimization and disable it. Your phone will be rebooted
5. Try it now :)

Answer 3

Sometimes it may happened due to insufficient storage within emulator.Try something like below:
   1. Stop emulator
   2. Open AVD Manager -> Wipe Data
   3. Start emulator and run your project.

Answer 4

01 - Uninstall the app installed in device

03- then run

• adb kill-server

02 -Then run again

• react-native run-android

Answer 5

In my case, I have to run this command in
/sdklocation/platform-tools/

 adb kill-server

then run again and watch for install request on the phone.
hope this help some one

Answer 6

Even i had the same problem,but restarting the genymotion and running the "react-native run-android" again worked for me. Ensure genymotion is running before running the above command.