As a general rule, everything works fine, but then sometimes either Eclipse or my Android emulator decides to be a jerk and refuses to work.
I open the AVD Manager in Eclipse. I choose which AVD I want and click Start. The emulator starts up and it goes through the loooong process of booting. It finally finishes booting and then for some reason, it immediately reboots and goes through the looong process of booting again. Once it boots the second time, Eclipse loses track of it. It is no longer lists in the Devices tab and I can't install my app or run it on that emulator. If I kill the emulator and try to start it over, then I get the exact same behavior. It's incredibly frustrating.
There are no messages happening in the console to explain the behavior. Any idea why this is happening?
That's a known issue when adb starts before the emulator. I don't know the real reason, but a quick workaround is to restart adb in the command prompt (with the emulator running)
> adb kill-server
> adb start-server
Now,
> adb devices
will return the emulator and Eclipse will be able to install the app.
While in Eclipse, choose Window->Show View->Devices.
If you can't see the emulator on the newly opened window choose the down-arrow icon in the same window (near the minimize and maximize buttons) and from the dropdown menu select "Reset ADB".
The alternative is to open CMD.exe and type the following two commands (change the ADB directory as necessary):
C:\Program Files\Android\android-sdk\platform-tools\adb.exe kill-server
C:\Program Files\Android\android-sdk\platform-tools\adb.exe start-server
I've seen this too. If you kill and restart the adb server, Eclipse should then see it.
> ./adb kill-server
> ./adb start-server
tried these commands in mac os x / eclipse - works, but it also kills the actual devices and you have to unplug/plug them back in to get them back.
Related
I have installed adt bundle eclipse. However, I can't seems to run the AVD. I have the problem of
ADB server didn't ACK
failed to start daemon
I have search on how to solve it, I've read to type adb kill-server and adb start-server. when I typed that, it says
adb server is out of date. killing...
ADB server didn't ACK
* failed to start daemon *"
Please follow below steps:-
Go to run
open command prompt
get into your platform-tools under android sdk.
now type command: adb kill-server
then upon success type: adb start-server
Thats'it.
Let me know if you still facing any issue..
I had this exact problem on my Vista x64 system. I solved it by doing the following:
Ctrl-Alt-Del, start Task Manager, under Processes tab, check for "shuame_helper.exe". It was there from running RootGenius. I clicked End Process, then went back to the command prompt and entered adb start-server and it worked!
Try below step from DDMS in eclipse :
So I had the same problem and failed in all the same ways as above:
adb kill-server
followed by
adb start-server
still resulted in the ADB server didn't ACK error.
The other common suggestion of using the task manager to kill the process also
failed as it seemed that something restarted adb automatically? It would disappear for a second, then there were two adb processes ,then there was one again.
Exasperated.
I restarted Windows in safe mode.
This ensured that adb wasn't started.
Shut down and restart normally. Problem solved.
Just for good measure, I also updated eclipse and android at this point, but I think that the safe mode restart fixed it.
Give it a try when all else fails.
When this happens I open Activity Monitor (on mac) or Task Manager (on windows) and look for the ADB process and force close it (sometimes there are more than one, close those to) and then press the Run button again in Android Studio or Eclipse.
1)Open task manager first
2)close any instance of adb.exe(end task it)
3)open command prompt
4) type adb start-server(you may have to execute it twice)
5) try to run now.
I had this problem using the latest ADT, SDK and Eclipse on Windows 7. I had an old ASUS TF101 and an HTC HD connected with their respective docking software. When I looked in processor tab of the Windows task manager I could see two instances of the adb.exe, one loaded and another one looking like it is trying to load.
I killed the PC connecting software (process in task manager) for the ASUS, the HTC Sync wasn't running. There is now one adb.exe running and both devices are recognised in Eclipse and in the command prompt (adb devices). You may need to restart Eclipse.
The emulator starts up fine. But when you long-press the power button (or F7) and choose "Power off", it displays a "Shutting down" message which remains on-screen forever and the emulator won't actually shut down.
I can close the emulator window or kill its process. But I'm wondering if this is the correct way to shut down an Android emulator.
According to the documentation I found at google, simply closing the
emulator window is the correct way to shut the emulator down.
To stop an emulator instance, just close the emulator's window.
Source: Starting and Stopping the Emulator
Open Android Studio
Go AVD Manager
Go Actions Tab
Click arrow
You will see stop
Click and emulator shut down :)
If the device is stopped in a bad state, this may persist when relaunching the emulator. To get around this, simply select 'Cold Boot Now' from the virtual device's drop down menu in the manager.
I'm running Android Studio Chipmunk 2021.2.1 and most of the solutions in this thread no longer work.
adb solution
What does work is using adb to shutdown the emulated device:
adb reboot -p
(The -p stands for power off, so it's not really a "reboot")
If you have multiple devices attached you'll need to specify which one:
adb -s DEVICE_SERIAL reboot -p
(You can find the list of device serial numbers by running adb devices)
Alternate pkill solution
Shutting down via adb is the clean way to shutdown the device. If for some reason that doesn't work, you can kill the emulator by running:
pkill qemu
This will kill every running instance of QEMU on your computer (QEMU is what the Android Emulator uses under-the-hood). pkill(1) is installed on most computers, but you may have to install it if it's not built-in.
Okay so do this:
Open Android Studio
2.Go to AVD Manager
3.Select Your Emulator and Cold Boot Now
On Mac, you can simply use the shortcut Cmd + w to close the emulator window (either window or docked mode). It would automatically shut down the emulator.
I've verified this for Android Studio Bumblebee | 2021.1.1 Patch 3
Open Virtual Device Manager, locate the virtual device you are concerning, check "Cold Boot Now" on the drop down menu of actions column of it.
This is for Mac Users.
Click on android emulator.
Go to top menu
Click on item which is shown (there will only be one)
Click on Stop/Quit from the dropdown.
It will then save its present state and then it will shut down.
No idea
I really don't know.
Here's what I do know.
Getting a list of running Android instances
You can get a list of running Android instances by entering this command:
adb devices
What else you can try
Now you can visit "How I shutdown Android phone with adb command?" and try all the proposed solutions.
I don't know whether any of them work. Please leave a comment below and inform us.
More thoughts
You can connect to a running emulator by entering this command:
adb shell
Now you can enter Unix-like shell commands which will do things. These are similar to the usual Linux shell commands.
Maybe the following will work? But, does it truly shut down, or does it reboot?
sync && reboot -p
In fact, does any "shut down" command work, or do they all just cause the running Android instance to reboot?
Please file a bug report
Someone should file a bug report, in the Android issue tracker, against the current version of the Android emulator — plus one of Google's newest available emulator ROMs. Once you do so, please leave a comment below and provide us with a link to the bug report.
If you were taking advantage of the emulator's "snapshot" feature, you probably didn't need to shut Android down in the first place.
If the feature is enabled, closing the emulator window should hibernate the emulator's state to disk. (Source.) This should make the emulator start up quicker next time.
You can enable snapshot support using AVD Manager's "Edit..." button.
If you want to enable snapshot support, you'll probably need to disable the "Use Host GPU" feature. I believe that the two features are mutually incompatible.
I tried to hold click on right side button for 3-5 seconds and choose to turn it off. It works for me.
Found an easy solution: from android device manager-> when having emulator in question highlighted, click on ... (three dots) on top right-> select Start with factory defaults.
Goto AVD manager (Tools menu > AVD Manager), in the actions section, stop and then wipe data
Now click play button in the same window
AVD is running on port 5555, the easiest way to close it is using the below command line:
sudo lsof -n -i :5555
It will show the PID that is running your AVD, use -9 or -15 to kill the process
kill -9 [PID]
On Windows 11, the emulator often refuses to shutdown, and just stays frozen. Killing the qemu-system process in Task Manager while AndroidStudio is running resolves the issue.
if you are using last version at Android Studio.
Deleted this file.
snapshot.lock.lock
multiinstance.lock
hardware-qemu.uni.loc
from
.android/avd/Pixel_3a_API_29.avd
My computer become slow because of running different application then i delete some process from window task manager. Unfortunately in this time adb.exe is also delete. I try restart the eclipse and reconnect the my mobile to usb port but doesnot work properly.Only remaining the restart my computer, so how to fix this problem.
[2011-10-12 15:09:00 - Ultimate Jokes] ------------------------------
[2011-10-12 15:09:00 - Ultimate Jokes] Android Launch!
[2011-10-12 15:09:00 - Ultimate Jokes] Connection with adb was interrupted, and attempts to reconnect have failed.
[2011-10-12 15:09:00 - Ultimate Jokes] 5 attempts have been made to restart adb.
[2011-10-12 15:09:00 - Ultimate Jokes] You may want to manually restart adb from the Devices view.
Another trick is to disable and then reenable USB debugging on you phone. While doing that pulling out the usb cable and putting it back in also helps.
Happens quite often. It's annoying buggy.
I normally go into Task Manager and end the process adb.exe. Try to run the app again and it normally says it's reconnecting. After a short time (normally by the 12th attempt) it'll kick into life.
I found this problem easy solution: if you are using phone.
Go to:
setting->Application->Development->USB debugging(if unchecked this
checked or if checked then unchecked again checked)
Which is work fine.
Just go to cmd prompt
And type "adb start-server"
Cheears
Check in your android sdk-> platform-tools -> adb. if there is exist then double click of that and restart eclipse
If you're a windows user, start a command prompt (console) and type : adb start-server. Then restart Eclipse.
Actually just closing Eclipse and restarting it works for me. If it doesn t start messing with the adb command in the console
You can solve it doing the following steps:
1) Disconnect your phone from the computer
2) On command line type: adb kill-server.
3) Reconnect your phone to the computer.
4) On Command line type: adb devices
the "adb device" will start the adb demon and represent you a list of the connected devices.
I was getting this problem since i upgraded my ADB plugin. I guess there is some compatibility issue with other components. go to [Help > Check for updates] update everything. This worked for me!!
i tryed to restart my computer and it did not work and i reinstalled eclipse and it did not change but i disabled my avast antivirus and killed eclipse and adb process and i opened eclipse and it was working normal
I have the same problem. You must uninstall previous versions of JRE or JDK (in my case I installed Java 7(adb not working). After I uninstalled Java 7 and installed Java 6 (adb working) ). After, restart Eclipse
on windows, try:
adb kill-server
adb start-server
Fix for Emulator :
Click Home button and then click the Menu button on the right-hand side panel and choose System Settings
Scrolldown for Developer options Uncheck or Check USB Debugging and Stay Awake. Click OK and then Relaunch the application.
I'm new with android development, and I have problems installing all the recent platform. I'm a java developer that I would like learning android.
I've installed all programs succesfully in windows xp sp3 (JDK 1.6 with environment vars created, eclipse 3.5, 3.6 & 3.7 well configured, Android SDK with all the features, devices, platform-tools, APi's, etc, and ADT Plugin 12 for eclipse with an emulator to API 8 -Target 2.2-), but, when I'm running an android project into eclipse (Run -> Android Application), the eclipse console show me: "The connection to adb is down, and a severe error has ocurred... You must restart adb and eclipse... Ensure that adb is in this path 'D:\Android\android-sdk-windows\platform-tools\adb.exe'" (or something similiar).
I'm very sure that the path is right, adb is correctly running on command-line, and the commands 'adb kill-server' and 'adb start-server' works fine, but doesn't solve my problem (like I've read in other answers).
The emulator, via Eclipse, not working, but if I start the emulator via Eclipse ADV Manager, emulator starts fine, but when I runs the android app, I take the same error.
I suppose that Eclipse can't start adb,but I don't know why.
Other issue, when I executed 'adb devices', console show me an empty list, no 'no devices' message, but when I plugged my HTC, adb is running fine in console, but Eclipse doesn't.
In addition, I also try restarting adb with Eclipse - Devices tab, but the list of devices are empty too.
Anyone can help me, please? I've read so much that my eyes are pixelated. xD
Best regards!!
PD: sorry, but my english is a bit poor ;)
in the DDMS perspective (if it doesn't show, add it by click window>open perspective>other...>DDMS)
then click the triangle of the devices tab > reset adb.
this works for me.
I finally resolved the problem, please see my blog
you can do this steps to solve the problem:
task manager-> process
right click on adb.exe and left click on "properties"
check the path of the process:
-if the path is like "Programs\android-sdk\platform-tools", which means it is the android sdk that is running this process.
-if not, that means there is another process this is running adb.exe, you have to kill the process or service which runs adb.exe.(you can identify the process by the path)
I've had this problem too. The solution I've found is to kill eclipse, open up task manager and kill the adb.exe process. Then when you start eclipse again, that should also kick start adb and it should work from there.
Try the following steps :
- Close Eclipse IDE
- Go to the Android SDK platform-tools directory in Command Prompt
- run adb kill-server
- run adb start-server
- Now start Eclipse again.
Hope this may help you :)
In my case, in Windows7
Close all opened emulators
Go to task manager > processes and then click on adb.exe and press the button 'end process'.
Then go to command prompt go to plate-form tools and type
adb start-server
Then run your application through eclipse.
It worked fine for me.
you try
Open Task Manager > Processes > eclipse.exe > End Process > restart eclipse
In my case the problem was the FIREWALL!.Turn off your windows firewall , Then restart adb and eclipse from task-manager
After I start the emulator by hitting Debug in Eclipse, after certain time it disconnects from the ADB, but the emulator stays open. It is responsive, I can navigate and start apps.
How can I attach back the emulator to ADB, to be able to debug from Eclipse?
(the current workaround is the terminate the emulator, close Eclipse and restart both of them, which takes 10 minutes as you know the emulator needs time to start up)
EDIT 1
Check out this image:
EDIT 2
After I kill and restart server. One emulator process shows up in Devices tab in Eclipse. But that cannot be expanded, and I don't see sub-processes.
I can't hit debug already, as it says: Debug already running. (How to I stop the debug?)
If I managed to start the debugging of another project, It hangs out in the emulator telling me: Waiting for the debugger to attach. Nothing happens.
As you said, the problem is not Eclipse losing contact with the Emulator, but ADB - the Android Debug Bridge - losing contact with it. As Eclipse uses ADB to communicate with the emulator when ADB is broken Eclipse can do nothing.
To fix this stop the ADB server by running the following command:
adb kill-server
Eclipse will then usually try to restart ADB, or you can restart it yourself by running an ADB command, such as:
adb devices
If you do, you'll see output like this:
* daemon not running. starting it now *
* daemon started successfully *
List of devices attached
emulator-5554 device
You can also do this via the mouse, using the Reset adb option in the Devices view in Eclipse.
It's also worth noting the Console view has two modes, DDMS and Android. You're usually in Console mode but it's DDMS mode which will show ADB status messages. Select modes by clicking the button with the Monitor icon, or using the arrow next to it:
If all else fails, try killing the adb processes from the OS. On Windows XP I use:
TASKKILL /F /IM adb.exe
There is an easier way. From eclipse you can reset the adb from DDMS panel.
Here's a short video on doing that "Reset ADB on DDMS"
Here's a quick screenshot of where you can get the option.
Sometimes a kill-server won't help at my machine (WinXP). For example I can't see the emulator in the DDMS-View any more or I do see it but no processes running on it.
In these cases I close the emulator and eclipse and manually kill the adb.exe-process from the process list.
When I then restart eclipse and the emulator, everything's fine again.
Now I just need a keyboard-shortcut for that :-)
on a mac, i just had to kill adb from activity manager and manually re-open the program again. had eclipse open all through and it worked just fine.
Try with adb kill-server and adb start-server. Even then the same problem occurs kill your running process from ddms prespective. Refer this link(http://www.jiahaoliuliu.com/2011/02/stopping-android-applications-already.html). This solved my issue. Hope for you also.
I am testing an application on an Android 4.0 (API level 14) emulator and once I run the app the emulator starts up and as soon as it loads, Eclipse DDMS disconnects from the emulator.
Here is the workaround that I am using: Open terminal, navigate to platform tools (C:\android-sdk\platform-tools\ or wherever you have your android-sdk installed), and run adb kill-server, and then run, adb start-server. DDMS should now list the emulator - from Java perspective, right click on the app -> Run As -> Android Application.
Hope this helps.
My handy bash script
#!/bin/bash
./path/to/adb kill-server
./path/to/adb start-server
./path/to/adb devices