Develop Reference

Android Studio - launch emulator AVD - "unable to locate adb"

When I launch emulator in Android Studio through AVD, it keeps on having this annoying popup "unable to locate avd".
I'ved removed platform tools and reinstall it under SDK Manager->SDK Tools->Android SDK platform-tools so that its a new avd.exe but it doesnt help.
I am really clueless now how, I would like adb prints coming from the emulator to debug. How can I solve this ?
FYI, I am developing flutter on Android Studio 4.0

I had the same issue as you were facing, I have Researched the Whole Internet but found nothing useful. So, I somehow figured out the problem and fixed it, The problem is at
app/src/main/java/io/flutter/plugins/GeneratedPluginRegistrant.java
Whenever we create a new project due to some reason the Module SDK is not set up automatically. Thus the ADB manager was throwing an error 'Unable to locate AVD', which is not that fatal as the error/warning is not stopping us from launching /starting the emulator, but it is so annoying to see that pop-up box. So here is my simple and quick fix.
Solution:
Click on the project folder, tap the dropdown icon just beside it.
Now Navigate to the path below.
> android/app/src/main/java/io/flutter/plugins/GeneratedPluginRegistrant.java
Now Click on the file GeneratedPluginRegistrant.java to open it.
Once it is open, At the Top you will notice a bar that says 'Module SDK is not defined',
Now right against it, you will also see a hyper-text named 'Setup SDK', Just Click on it.
That will open a Pop-up Box with the title 'Select project SDK'.
Now select the Android Platform API and then click OK. After that being done Restart your IDE.
Your Problem will be Solved. And you will also notice that Emulator Opens up way faster than before.
NOTE:
The Above Steps has to be performed with every new flutter project.
I have attached some screenshots just follow them.
The Problem
The Below image represents the annoying Popup-box that you encounter while launching the AVD which we are going to fix.
Step 1 : Close the AVD window
Step 2: Navigate to GeneratedPluginRegistrant.java
Step 3: Look for Module SDK not Defined
Step 4: Against to Module SDK click on Setup SDK hyper-text.
Step 5: Select any Android SDK version
Step 6: Click OK
Step 7: Restart Android Studio IDE.
After Restart you wont see the Annoying popup box anymore.
I have also Uploaded a Youtube Video for you. Check that out as well.
https://www.youtube.com/watch?v=19ESTnrmYJY&feature=youtu.be

This may seem very basic but start with a full system restart,
Where did you install the SDK's & AVD(Default Directories).
Do you have the same issue when you plug in your own Physical Device.
Ensure you have enabled USB Debugging for step 2.
If possible walk us through the installation steps so we can identify any possible errors you may have made

I've had the same issue and it took a while to figure out what's wrong, but in the end, it was a storage problem, just check if you have couple of gigs (at least 5gb) of free space left where you have your avd installed. That fixed it for me.

Try this.
Copy platform-tools address and paste it in environment variable in path.
C:\Users\viram\AppData\Local\Android\Sdk\platform-tools
hope this works.

I will answer this myself as this was how it was solved.
open a native android project, and then adb works.
This looks like a bug in flutter.

Failed to install the Android studio application on my phone [duplicate]

Trying to install app on real device following instructions:- http://developer.android.com/tools/device.html. At end Android Studio giving error:
Session 'app': Error Installing APK
I guess the problem probably can be in my android device(it is chinese Doogee X5). It does not have a given USB Vendor ID in developer docs so I decided to follow instructions with random vendor ID from HTC.
I'm sure there is a way to run application on any android device, but yet I didn't find an answer on how to do that.
I'm running through Linux Ubuntu 14.04 LTS

Edit:
In newer Android Studio versions you can re-sync the project using this button:
For older versions:
Open Gradle window (on the right side in Android Studio) and click on the refresh button.
However it is not a 100% sure fix.
Solutions for other cases:
Open terminal window and type "adb kill-server", then type "adb start-server". Usually after a few hours of inactivity, adb used to disconnect the device. (If you don't have the sdk/platform-tools in the PATH environment variable, then you should open a terminal in that folder)
One tip if these solutions don't help you:
If you open the Event Log window in the right bottom corner of Android Studio, you can see a detailed error message.
Other edge case
If you see this error: INSTALL_FAILED_INVALID_APK:... signatures are inconsistent.
Then unfortunately a gradle refresh isn't enough, you have to go to Build -> Clean Project and then Run again.
Issue with Android emulator
If you want to deploy the APK to an Android Emulator and you see the "Error installing APK" message, your emulator may be frozen and need restart.

Turning off the Instant run removed my error for Androdi Studio 2017.03.03 v2.3

You have to enable Developer options and enable USB Debugging:
Go to the settings menu, and scroll down to "About phone." Tap it.
Scroll down to the bottom again, where you see "Build number." (Your build number may vary from ours here.)
Tap it seven (7) times. After the third tap, you'll see a playful dialog that says you're four taps away from being a developer. (If only it were that simple, eh?) Keep on tapping, and poof, you've got the developer settings back.
http://www.androidcentral.com/how-enable-developer-settings-android-42
Inside Developer Options, enable USB Debugging

Try using a different version of Gradle(stable version).
To summarize:
Check your gradle file for debuggable false/true
Invalidate caches & restart
Check your install location
Restart adb

I fix this by delete the build folder then run project again

Make sure that your device is not out of Memory!

I changed my USB port and that fixed it for me.

Make sure that project name doesn't contain special character.

Another possibility may be the USB driver on your PC. In my case, switching from my 3.0 USB port to my 2.0 port fixed the problem.

Ensure you android device has enough memory to install the app. Sometimes it so happens working with multimedia app where the device storage keeps on increasing and you keep wondering about the error.
Therefore, free up some memory and try installing again!

A bit late to the party, but be sure that you are trying to build a proper build variant. It sometimes happens to me that when I update AS, the build variants are totally messed up, so instead of building the "debug" variant I am actually building the "release" variant, which outputs apk to a different location (not to app/build directory, but to app directly) and I get the following error:
The APK file /path/to/file/app.apk does not exist on disk.
Error while Installing APK
To fix this just open the menu in left bottom corner, click on "Build Variants" and select the debug variant (it might have a different name, depending on how many modules/flavors or custom gradle build types you have).

Try to remove the .idea folder and .gradle folder, then click Sync Project with Gradle Files, when the process finished, try to run app again.
Hope it works.

just press Build button from menu bar and then press build app wait for it finished then press build APK and then run your emulator, it will work

Usage of easily changing variable value will often happen in build.gradle(like the Date)

In my case with Android 8.0(Oreo), no one of this solutions worked!
If you have more than 1 user, then you should go to Settings->Applications->All Applications->Find the application and uninstall for all users!
After this steps, it worked!

Just rebuild and clean project, then run project.

This happens because the gradle is not synced with the app. Go to : Tools -> Android -> Sync Project with Gradle files. Re-run and you should be good to go.

Nothing above helped me. The fingerprint dialog did not appear. I checked another android device and the dialog appeared and debug was possible.
So the problem was on device side not on computer side I made reset "to factory settings" on device and this helped me.

I fixed my issue, simply by using :
Build->Clean Project
then
Build->Rebuild Project

I had this same issue and none of the other solutions worked for me.
Although no errors were shown nor expanded upon in my IDE GUI, I opened up a second Android Studio window window with a different project and noticed in the bottom that the "Event Log" showed an error in a different window, but not in the project I had opened. The issue stated was:
Error: INSTALL_FAILED_CONFLICTING_PROVIDER
Which lead me here - Install shows error in console: INSTALL FAILED CONFLICTING PROVIDER :
I had this FileProvider labeled in the manifest:
<provider
android:name="androidx.core.content.FileProvider"
android:authorities="myapp.sameonehere.android.fileprovider"
android:exported="false"
android:grantUriPermissions="true">
<meta-data
android:name="android.support.FILE_PROVIDER_PATHS"
android:resource="#xml/file_paths" />
</provider>
Which I had copied from another project and forgotten to rename the 'authorities' String in. After changing it to something unique, it ran without issue.
Make sure you don't have any conflicting authority Strings like in my example.
Also, if no errors are showing up, try opening a second project and see if the "Event Log" shows errors in that location instead.

Uninstall the app, and re-install and it should work!

Go to avd manager and click on Wipe Data of the device you want to run. Worked for me. The size of device on disk will reduce after wiping the data. I hope it helps someone.

You have to enable Developer options and enable USB Debugging:
1:Go to the settings menu, and scroll down to "About phone." Tap it.
2:Scroll down to the bottom again, where you see "Build number." (Your build number may vary from ours here.)
Tap it seven (7) times.
After the third tap, you'll see a playful dialog that says you're four taps away from being a developer.
Keep on tapping, and poof, you've got the developer settings back.

My issue was solved by
Clean --> ReBuild --> Run
and in my case it was because i accidentally deleted the project folder and when i clicked ctrl+z to restore something wrong happened.

My problem was that I didn't accept the connection from the computer after turning on remote debugging. Once I accept the mac address, it went away. Silly mistake, but I didn't see the dialog box the first time. Worth a quick check if the others don't resolve the issue. But likely only a problem the first time you set up a phone.

What worked for me is deleting the app from the emulator (which was an app built from an older commit) and re-running from Android Studio.

It was written above: in my case it was just out of memory on device storage. Add more empty space - and error will disappear

I tried invalidating cache, deleting build folder and gradle sync. Also, I couldn't uninstall because the app is not visible on device. So I tried uninstalling through ADB and it worked.
adb uninstall <package_name>

If you are using android emulator, try changing a device.

Android Studio: Application Installation Failed

I've been trying to learn how to use Android Studio but when I attempted to run one of the sample programs I get this error message:
Installation failed with message null.
It is possible that this issue is resolved by uninstalling an existing version of the apk if it is present, and then re-installing.
WARNING: Uninstalling will remove the application data!
Do you want to uninstall the existing application?
I've tried to do this on 5 more sample programs and all of them give me this error. Does anyone know how to solve this?

I'm Using Redmi 3s mobile. I got same problem.
Solution: This issue is common on Xiaomi phones running MIUI 8. This can resolved by turning off MIUI optimizations from Developer Options in Settings app. Then recompile the app and voila it works.
Settings --> Additional settings --> Developer options --> Turn Off MIUI optimization
Or
Settings --> Developer options --> Turn Off MIUI optimization

I got the same problem , just choose clean project then rebuild project from build menu , it's solved my problem

Disable Instant Run
Preferences > Build, Execution, Deployment > Instant Run
Source: comment by #user77309

Path: Android Studio Preference / Build, Execution, Deployment / Instant Run
Go to Android Studio Preference (for Mac) or Settings (for windows)
Choose Build, Execution, Deployment tab
Choose Instant Run
Uncheck Enable Instant Run to hot swap code/resources changes on deply (default enabled)
It works for me!!

Go to Settings > Applications. Probably you have the app still installed for other users (I had the same problem with a Moto G, I did not see the app among other apps, but it still was among my apps in Settings). Try to find it and remove for all users.
If the problem is this one you will find the app at the end of the list (in Settings > Apps > All)
All the apps marked as "Not installed" are still there and you can not install the same apps with Android Studio until they are there

This happens when your app is using any library and there is also an app installed in your device that is using the same library.
Go to gradle and type:
android{
defaultConfig.applicationId="your package"
}
this will resolve your problem.

INSUFFICIENT_STORAGE
Solution:clean you phone storage
Pay attention Android Studio log:
open: Permission denied
open: Permission denied
pkg: /data/local/tmp/com.example......... Failure [INSTALL_FAILED_INSUFFICIENT_STORAGE]

Step 1: Go to "Setting" → find "Developer options" in System, and click.
Step 2: TURN ON "Verify apps over USB" in Debugging section.
Step 3: Try "Run app" in Android Studio again!
and you should also TURN ON following fields inside "Developer option" .....
1: TURN ON ->"Install via USB" field

Some solutions:
1 Build -> Clean Project
2 Build -> Rebuild Project
3 Built -> Make Project
4 Remove your application from device and try install again
5 Mb you have some problems with actual version of yours app(try to pull actual branch). Also you can check on your emmulator, if yours app is running.
6 Try to use 1,2,3,4 solutions.

The solution for me was : (in a Huawei)
Android Studio -> Build -> Clean Project
In the phone -> go to Phone Manager -> Cleanup and Optimize

I had the same issue, and found that it was the USB cable I was using that was causing the issue.
Changing the USB cable fixed the issue, and I could successfully install the app afterwards.

In real device do below tasks..
1.clean all cache memory.
2.check the internal storage space (if space is just 500 mb free, then remove some data or app in the internal storage maintain at least 1 gb space.
3.again do clean all cache memory.
4.now goto android studio or eclipse click on app goto run select the device and run
I hope app will install and it will run..!!!

Uninstalling from AVD worked for me. After reinstalling it worked

For the 1st time installation of apps in a device, enable developer option which is mentioned in the above post. For facing problem while installing the apps from the tool, follow the below steps....
By enabling an option in settings, you can install apps directly. Error will disappear.
For MI users: Go to Settings-> Additional settings-> Privacy-> Unknown sources (make it enable)
For Normal Users: Go to Settings-> Security -> Unknown sources (make it enable)

Simply closing Android Studio (and emulator) then re-opening fixed it for me. Once I ran the app again, the apk re-installed successfully and app ran properly.

Recently I also find the same problem and there some reasons behind this but I am giving you 3
In your phone in the setting go to "Developer Option" and enable USB debugging
Also, check the "Install via USB" is also on in Developer Option itself.
In Android Studio go to File -> Settings -> Build, Execution, Deployment -> Instant Run and uncheck the Enable Instant Run
It must work.

Happened to me as well:
At the first time, it says-
Failure [INSTALL_FAILED_CONFLICTING_PROVIDER]
At the second time, it says-
DELETE_FAILED_INTERNAL_ERROR
This because of the new 'com.google.android.gms' version 8.3.0
Changing it back to 8.1.0 solved the problem in my case

I was having the same error, but i fixed it after reinstalling the HAXM. This problem is caused because of the virtual device not starting properly. If your device keep showing on screen "Android" or the screen is black, it have not started yet, you have to wait more for it to start properly, then it shall run. If it is too slow, maybe you should find a way to accelerate the Android Virtual Device (AVD). The Intel computers have the HAXM (hardware-accelerated-execution-manager).
In my computer was not starting because of the HAXM not working, I fixed it by reinstalling the HAXM, downloading it from the intel website: "https://software.intel.com/en-us/android/articles/intel-hardware-accelerated-execution-manager"
Then i set the HAXM max memory to 1536MB in the installation, for not having the problem of this other post, that you maybe have and i was having too: "HAXM configuration in android studio"
After all done, it worked fine.

android {
buildTypes {
debug {
debuggable true
}
and
In the AndroidManifest.xml file, add android:debuggable="true" to the <application> element.
https://developer.android.com/studio/run/device.html#setting-up
it works for me..

I solved the issue by simply deleting my whole /build folder and rebuilding (menu Build > rebuild project).

This problem cause to me because of the project path .
Y:\Example&SourceCode with & sign
So i change the Project path to another one without special characters. Now It is Fine.

For me it only started working after I rebooted device (Motorola-Nexus-6).
(I also tried to clean, disable "instant run", reopen Android Studio, verified installed applications to be sure there are no clashes, disable and reenable Debug mode in phone, reconnect USB cable)

I have faced this issue since I have upgraded the build tools from 26.0.2 to 27.0.3. Reverting back, clean and rebuild solve the issue.
Also I have degraded the gradle plugin version from 3.1.3 to 3.0.1 as the latest version was overriding the build tools to latest version.

I also got same problem while generating signed APK. Just select APK signature scheme v1, not v2 (introduced in in Android 7.0). If you select v2 scheme it won't work on devices that use Android versions older than 7.0.

if your "versionCode" in build.gradle file is less than the eralier version code then, your app wont install.
Try to install with same "version code" or more than that.

If you do all of things above and still get stuck, just try reopening your Android Studio.

I had the same issue but finally it worked after storage clean on my mobile. May be happen because of insufficient storage

I have a Redmi K20, the following is MI, Redmi specific that I learned in a hard way
How I ended up in the error: I uninstalled the debug app from the phone because my assets were not accessible (maybe I had faulty source code)
Solution (steps that worked for me in sequence):
Uninstall the app
As per suggestion above by #Jayaprakash G and all, I turned off MIUI optimization
I tried finding "Instant Run", but seems missing in Android Studio 3.6.2
MI supports "Second Space", switch to it. You'll observe the app is still there. Again uninstall.
Switch space back to original again. By any chance, if you see the same app in frequently used app in the app drawer, again uninstall.
Try to compile and run the app from Android Studio and let it show in the app phone (Error 3 will be still there, but installation will succeed).
Clean the project, close Android Studio
Start Android Studio, now everything will work as normal without the Error 3

I solve this problem by:
Enable Instant Run
Settings>Build, Execution, Deployment>Instant Run

An internal error occurred during: "Launching Project". java.lang.NullPointerException

My android project was compiling well but suddenly it stopped launching. Then I tried to launch other projects from Project Explorer and all project threw same exception:
An internal error occurred during: "Launching Project". java.lang.NullPointerException
But console always shows everything is normal.
Android Launch!
adb is running normally.
Performing com.mmcolrev.LoginActivity activity launch
Here's screenshot of error.

If anyone face this problem, first keep in mind that error is not in your code but due to some internal issue in eclipse ADT. I don't know exact problem but luckily found way to solve it. If you ever encounter this error follow steps below:
Exit Eclipse.
Go to Android workspace.
Locate .metadata folder(make sure you set hidden folder visibility on).
Delete .metedata folder.
Start Eclipse(you will notice project explorer is empty, don't panic) and import all your projects.

Removing Gen/R.java and restarting eclipse, worked for me.

This is a cause of AVD is not picked because you might delete it or it is not picked up correctly ... in other words deployment target is not specified or it has some problem in picking up a device.
To Resolve this:
Right click your project and choose "Properties"
From "Run/Debug" Settings, Highlight over your application name then hit "Edit..."
In "Target" tab, you have to choose a virtual device to be picked automatically under option named "Automatically pick compatible device..."
to avoid such prompt you could choose the first option "Always prompt to pick device" that will ask you everytime to choose or pick a device inside which you want to run your app.
If it still not working restart Eclipse

One cause of this issue for me was that I had been updating my Android Tools with the installer. It was running in the background doing all its updates. I had forgotten about it since I had told it to do the work in the background. Then realized it had finished its work and needed a restart after the installation.
Once the upgrade / installation was done and the IDE was restarted, the Eclipse environment went back to behaving as normal.

I had the same issue.
Non of my project in the workspace would run and I would get the same message "An internal error occurred..." and details would just say something about a Nullpointer. This happend after I did some updates and all projects in the workspace started giving the same issue.
It took me some time to find the problem:
When I go to configuration of the project (Run Configuration...) I could see that "Project" in the configuration settings was empty. So my update removed the projects from the configurations. Once I put back the project in the configuration again problem was gone.

In my case, it was because I was running it with Debug As -> Android Native Application, while the emulator was closed (I debugging on the emulator, not on a real phone).
I needed to first start the emulator using Debug As -> Android Application, after which Debug As -> Android Native Application will work.
Close the emulator and the error re-appears. My conclusion is that Debug As -> Android Native Application won't work unless the emulator is already started.

I had this error with an NDK project (eclipse mars, loaded an ant project) everytime i tried to lauch on the device (google tango yellowstone) using Debug As -> Android Native Application. Note, that i switched the device and changed a dependent library since the last successful build.
When i tried Debug As -> Android Application i got this message:
Re-installation failed due to different application signatures. You must perform a full uninstall of the application. WARNING: This will remove the application data!
Do you want to uninstall?
clicking OK here solved the issue, so Debug As -> Android Native Application also worked again.

I had the same issue all of a sudden. This only happened when I ran in Debug mode, and for me what fixed it was... Run -> Remove All Breakpoints. Then I could add them back, and it ran in debug mode fine.

To resolve this issue, I just remove the old JRE System Library and point to the new JRE System Library.

Got the similar issue after update the project able to procced.
Right click on the project -->Maven --> Update Project

In My case issue was java version in updating it to correct (11->1,8) and doing maven update helped me

ISSUE : Error: Could not find or load main class com.pluralsight.fundamentals.FundamentalsApplication
Caused by: java.lang.ClassNotFoundException: com.pluralsight.fundamentals.FundamentalsApplication
ANSWER:
Open cmd (Command prompt)
Check java version (java -version)
Open POM.xml and check java version there
You are getting this error, that means java version is mismatched.
Change the java version in POM.xml (example: if java 11 , add it as 1.11 in pom.xml file)
Example: <java.version>1.11</java.version>
Update Maven by right click on the on the project in eclipse
Now it will work and the error will be vanished :)

Android: Eclipse doesn't pushed new version of app to emulator

When developing for Android in Eclipse, the emulator relaunches the old version of the app each time I run the project unless I go through the rather arduous procedure of Settings -> Applications -> Manage applications -> [my application] -> Uninstall -> Ok -> Ok in the emulator.
I had this problem on some projects but not on others when following the tutorials on the Android Developers site, and my friend turns out to have the same problem. Although this has been asked before (here and to some extent here) their problem turned out to be "some extra quotes on one of the xml file" and I can see no such thing in my project. Otherwise people seems to be saying that Eclipse should push the new version. Unfortunately, it doesn't.
I would be grateful for any suggestions.

I had this issue as well, and what i figured out was:
If you are using your device for debugging, then you should launch a debug session, not a run one.
On the other hand, if you want to install an application, or you want to launch a run session directly on your device, the version of your application set in the androidManifest.xml must be greater than the one on your phone.

Try Menu-Project-Clean, Select your project to clean, this will delete everything but the source. Eclipse should re-build automagically if not select Menu-Project-Build Automatically.
Right click your project, Android tools, fix project should automatically fix some unknown error maybe
Double check your xml, an error in a layout could cause your situation. A wrong id for example will not show as an error in eclipse.