I can't use the command telnet localhost 5554 to connect Android emulator.
Always get this error:
Connecting To localhost...Could not open connection to the host, on port
5554: Connect failed
I even have all ports set to allow connections in both the inbound and outbound rules in Windows Firewall.
I am running Windows 7.
I've encountered this issue a few times, I'm not sure how the the emulator deals with addresses, but localhost just doesn't work for me.
Changing the connection command to telnet 127.0.0.1 5554 enabled me to connect, so if localhost doesn't work, try 127.0.0.1
Try using the complete command inside telnet:
Microsoft Telnet> open localhost 5554
That should work, sometimes we forget to write the entire command
Use the netstat tool to verify the application is listening on that port. I'm not familiar with netstat on windows, but it seems you'll need -a -n and optionally the -o options.
If you see the process listening, keep looking at the firewall. If you don't see one, figure out why it's not running.
Firstly ... you should enable Telnet command in windows .
check this
http://www.labnol.org/software/windows-telnet-command/18222/
then it will work :)
first simply type telnet to your command prompt
Microsoft Telnet> open 127.0.0.1 5554
above line might show you following result
Android Console: Authentication required
Android Console: type 'auth ' to authenticate
Android Console: you can find your in C:\Users\YOURPCNAME.emulator_console_auth_token'
OK
then go into your 'c' drive then user where you find .emulator_console_auth_token
open that file and put you auth token like below
auth ################
then you find
Android Console: type 'help' for a list of commands
OK
it means you are connected now..
If "telnet localhost 5554" doesnt work, try using port 5037.
Also ensure that the Emulator is running.
In cmd: you press cd D:\Android\sdk\platform-tools. It is path to platform-tools in your computer. After you can input telnet localhost 5554
redir add udp:9876:9876 or redir add tcp:5000:6000
Related
I'm trying to get udp packets into android emulator sent from PC.
Server is sending udp to my PC, port number 4000, and I want to see the udp packet in the android emulator.
So i tried port redirection like:
redir add udp:4000:4000
But i can’t see the packet in the android emulator. What should i change if I want to receive the Udp packet into the android emulator?
I found this open bug:
https://issuetracker.google.com/issues/80149140
and their suggested workaround works for me!
The easiest way of doing this is to run the emulator with the additional parameters:
-feature -Wifi
So launching my emulator is something like this:
cd "C:\Program Files (x86)\Android\android-sdk\emulator"
./emulator.exe -avd tablet_m-dpi_10_1in_-_api_28 -feature -Wifi
And pay close attention that its -Wifi (lowercase f and with a hyphen). You can get a list of your devices by using the command:
./emulator.exe -list-avds
And you still need to do the telnet bit after the emulator is running:
telnet localhost 5554
auth <your+code+here>
redir add udp:8000:8000
I can't open the application I'm developing in Android Studio emulator, It is showing the following message in the log
Could not open Selected VM debug port (8700). Make sure you do not have another instance of DDMS or of the eclipse plugin running. If it's being used by something else, choose a new port number in the preferences.
Unable to open connection to: localhost/17.253.38.253:5037, due to: java.net.ConnectException: Operation timed out
Following is the port listening by adb
adb 14528 unnikrishnan.b 10u IPv4 0x7e537943f4599ac9 0t0 TCP localhost:5037 (LISTEN)
This happened after I upgraded to android studio 3.1.2. How I can fix this issue?
Thanks,
Unnikrishnan B.
can be caused by an ip address in the file etc / host, sometimes you enter an additional to make tests and it is not deleted, you must check that in your file this
127.0.0.1 localhost
255.255.255.255 broadcasthost
:: 1 localhost
you can also ping the address 127.0.0.1 to check for an answer, $ ping localhost
additional information that can helps you
https://issuetracker.google.com/issues/37126279
I'm trying to set the coordinates on an emulated device.
XXXX-MacBook-XXXXX XXXX$ telnet localhost 5554
Trying ::1...
telnet: connect to address ::1: Connection refused
Trying 127.0.0.1...
Connected to localhost.
Escape character is '^]'.
Android Console: Authentication required
Android Console: type 'auth <auth_token>' to authenticate
Android Console: you can find your <auth_token> in
'/Users/XXXXX/.emulator_console_auth_token'
OK
The problem is...
geo fix 77.9888 34.0000
KO: unknown command, try 'help'
I don't seem to have the geo command
help
Android console command help:
help|h|? print a list of commands
auth use 'auth <auth_token>' to get extended functionality
avd control virtual device execution
quit|exit quit control session
try 'help <command>' for command-specific help
OK
In fact, it looks like most of my commands are missing.
Does anyone know why the commands are missing?
You are not authenticated.
Obtain the content of /Users/XXXXX/.emulator_console_auth_token and after the OK prompt enter
auth <auth_token>
For amateurs' like me what diego-torres-milano meant :
cat /Users/XXXXX/.emulator_console_auth_token
<copy the above contents - auth_token>
telnet localhost <portnumber> (mostly 5554)
auth auth_token
I am trying to reverse-forward port through ADB, but it just returns cryptic error of error: closed. Normal forwarding works. Session snippet:
$ adb forward tcp:59778 tcp:59778
$ adb forward --list
015d2109ce0c1a0f tcp:59778 tcp:59778
$ adb forward --remove-all
$ adb forward --list
$ adb reverse --list
error: closed
error: closed
$ adb reverse tcp:59778 tcp:59778
error: closed
error: closed
I am connecting via USB to non-rooted Nexus 7 2012 Android 4.4.4 from Windows 7 Pro x64 on Boot Camp.
adb reverse was introduced in Android 5.0
Since adb reverse is not supported in Android versions lower than 5.0, you need to use an alternative method, for example connecting via Wi-Fi instead. If you are using React Native, Facebook has added official documentation to connect to the development server via Wi-Fi. Quoting the instructions for MacOS, but they also have them for Linux and Windows:
Method 2: Connect via Wi-Fi
You can also connect to the development server over Wi-Fi. You'll first need to install the app on your device using a USB cable, but once that has been done you can debug wirelessly by following these instructions. You'll need your development machine's current IP address before proceeding.
You can find the IP address in System Preferences → Network.
Make sure your laptop and your phone are on the same Wi-Fi network.
Open your React Native app on your device.
You'll see a red screen with an error. This is OK. The following steps will fix that.
Open the in-app Developer menu.
Go to Dev Settings → Debug server host for device.
Type in your machine's IP address and the port of the local dev server (e.g. 10.0.1.1:8081).
Go back to the Developer menu and select Reload JS.
Follow these steps carefully.
Note: All commands need to run inside a project only.
Run this command first:
npm react-native start
Open another window in the same project and run:
curl "http://localhost:8081/index.android.bundle?platform=android" -o "android/app/src/main/assets/index.android.bundle"
This will create index.android.bundle in the assets folder
Run:
npm react-native run-android
Now you can get apk in the build folder which will work fine.
adb reverse requires Android 5.0+. For devices previous to that, you'll need to use a workaround like so.
If you have busybox installed on your Android device (most Genymotion images do), you can emulate adb reverse using this incantation:
adb shell busybox nc -ll -p {guest port} -e busybox nc {host IP} {host port}
In this case, "guest" is the Android OS running in the emulator and "host" is the computer running the emulator.
cause of adb reverse isnt working on android prior 5 you could propably use adb forward with a service listening on android and tunneling other connections through this inbound connection. I am doing this mostly with ssh, but you would need an ssh server on android. you than can connect using ssh -R incommingreverseportonandroid:hostyouwanttoforwardto:portyouwanttoforwardto sshuseronandroid#localhost -p portyouhaveusedforadbforwaqrdtoaccessandroidssshserver
but i dont know how to enable an ssh server on android and maybe there is a better way cause ssh uses encryption which isnt needed over usb and using up cpu.
i am using this way with my server to share a service when i am forced behind a nat...
hope someone will find a way to bring this teoretical way into practical possibility
Just use 10.0.2.2 instead of localhost/127.0.0.1 for your hostname. It will directly try to connect to the port on the host machine (same affect as reverse).
I have been trying to understand the basics of android emulator networking. I found this Emulator details.
which asks to execute these commands :
telnet localhost 5554
redir add tcp:5000:6000
Que : So my doubt is that where do I exactly enter these commands??
use a normal command line window to type in telnet localhost 5554
you have to check first if telnet client is activated on your pc:
In windows:
check this link turn-on-telnet-in-windows-7
In ubuntu install it by:
$ sudo apt-get install telnet
You have to run your emulator first also!! hope this will help you