Develop Reference

Error installing Android Emulator through "SDK Manager", can not manually install either

When I try to run the emulator through Android Studio, I get the message the emulator is not installed, so I try to install it. Every time I get the following error:
An error occurred while preparing SDK package Android Emulator: Connection closed at byte 320157527. Expected 323030753 bytes..
So, per this solution I tried manually installing the emulator and placing it in the [Android SDK folder]\emulator folder. Upon doing this, it would still tell me it was missing the emulator & try to install it in [Android SDK folder]\emulator-2, since the "normal" folder existed.
How do you get Android Studio to recognize manually installed packages?

Fortunately, I have Android Studio working on another PC. The only difference I could find between the two installations, was the manual install of the emulator was missing the package.xml file.
I copied this from my other PC & now everything is working perfectly!
I hope this helps someone else, or really me next time I run into this & can't remember how to fix it.

Android Studio - This application failed to start because no Qt platform plugin could be initialized

I've installed Android Studio to run a React Native application on an android emulator.
I've followed the instructions from the react native website under Windows / Android.
Now when I try to run the simulator I'm getting the error below. I've searched for the error but no useful results found.
I've reinstalled Android Studio but to no success. Any idea on how to fix this?

I was getting same error while launching Android Emulator.
My c drive Users folder was hidden and Ready Only. I unchecked both Read Only and Hidden chekboxes.
Then it started working for me.

Similar to #Supriya Bhosale's answer to unhide the folder - specifically the Android/Sdk folder.
I moved my Android/Sdk to D drive because of C space constraint. In my Windows 10 desktop it was working even with the Android\Sdk folder hidden. But not in Windows 11. So unhiding it fixed this error for me on Windows 11 using Dolphin version of Android Studio.

Android Studio Blank Activity Compilation Fails

I have been coding for a few years now and decided it was time to sink my teeth into android development. So I downloaded the latest version of Android Studio and installed all the relevant components with the installer.
However when i try to create a new project, using the blank activity, without even changing a single line of code, or editing the project in any way, the compile fails with the below error:
android execution failed for task :app:packageDebug
> Implementing Class
I have no idea of to fix this, any help would be greatly appreciated.
Thanks

I have been having the same error message. This is what I have found out:
I have a Mac Book Air with a Custom OS Image installed (from work) and on this computer I see the same error message above even from a fresh install (custom image) and fresh install of JavaRE and JDK as per the Android Studio System Requirements. Also a fresh install of Android Studio using a Blank activity with no additional lines of code.
However, I reinstalled OS X 10.10 from scratch, straight from the App store, with no OS customizations, installed the same JavaRE, JDK and Android Studio and the Error message did not appear.
I have been scratching my head over this error for a while now and this is the only solution that I have found. I'll keep digging and report back if I find a better solution.

Failure to install APK [INSTALL_FAILED_DEXOPT] Android Studio

I have tried literally everything to try and rectify this error when trying to deploy an app to an actual android device for debugging but have been unable to solve the matter. Everytime I try to launch I get a failed [INSTALL_FAILED_DEXOPT] error and when checking the logcat it is always because there is no classes.dex in my debug apk.
If I run gradlew.bat clean assembleDebug, there is no difference in the apk size so I'm assuming there is a build error in android studio. I am using android studio beta 0.86 and have tried it on 0.89 with the same result. I have tried build tools for 19.1 to 21 with no result. I have also tried different devices and created a new project (that has never been installed on my devices) and android studio seems to think it needs to be uninstalled first when attempting to deploy.
I have tried switching my device to ART, uninstalling and reinstalling android studio, redownloading the sdk and restarting my computer. NOTHING and I mean NOTHING has worked. I think the problem started after I downloaded the lollipop apis but am not sure. I have tried uninstalling all apps with my package signature on my device but NOTHING works! Not even Project -> Clean Project -> Rebuild
This is extremely frustrating as I cannot debug my apps anymore :/ has anyone had any experience with this error or ways to rectify it?

So turns out that the issue was mismatching sdks between Android Studio and the Project. The project was using an old sdk and once I made them the same, I cleaned and rebuilt the project and everything was good to go.
UPDATE:
I ran into the problem again after I tried to update my SDK and its tools. Turns out that when you try to do this, the SDK locks the tools folder and then you get an error saying some file couldn't be overridden. When this happened to me, all the build tools were deleted so there were errors in the .dex file created when debuggin my app.

We are using android 2.2 (really old i know) and couldn't find a fix for this error. Eventually we found this bug https://android-review.googlesource.com/#/c/30900/. The only solution for us was to remove some libraries...

I kept having the same problem - manually building worked fine, but Android Studio would not build a proper APK.
The problem was that I started the project on Android Studio and Android Gradle plugin version 2.0-beta2. After updating the Gradle plugin to 2.0-beta6 through a simple build.gradle change, the builds stopped working.
Turns out that, although I installed a beta version of Android Studio, the update checker only checked the stable channel. After setting the updater to check the canary channel as well, I was able to upgrade Android Studio to version 2.0-beta6 and builds continued to work normally.
You can change the update preference in Android Studio settings under Appearance and Behavior -> System Settings -> Updates.

I encountered this error when storage of the device is full. Try to open some space.

Try run these commands
adb reconnect
adb reconnect device

Unable to run 'Hello World' application error: INSTALL_FAILED_OLDER_SDK

I am newbie in Android app development.
I am using Android Studio and created sample/new project of 'myapplication' as stated on this site:
https://developer.android.com/sdk/installing/create-project.html
I have successfully run this program on my Android device running on version 4.2.
However, I remover package Android4.4W SDK from SDK manager. And deleted this project and recreated. Now, whenever I am trying to run this program. I am getting following error:
Installing com.example.ashv.myapplication DEVICE SHELL COMMAND: pm install -r "/data/local/tmp/com.example.ashv.myapplication"
pkg: /data/local/tmp/com.example.ashv.myapplication
Failure [INSTALL_FAILED_OLDER_SDK]
Notes:
I have delete existing installed filed from device.
I have check that following set 'android:minSdkVersion="17"'.
I have set it to 15 but it doesn't help.
Is 'Android4.4W SDK' is mandatory to run application on device?
(I can not install this package, after this studio doesn't render Android view (activity.xml design tab) with 'TextView' and shows error (render exception). That's why I have removed this package).
Please suggest.

I got the solution and would like to share.
Whenever i was creating my project, a file gradle.build (containing all tags like android:minSdkVersion="17", android:targetSdkVersion="17" etc.) were not updating values according to my device version even i was selecting correct version of API while creating project in android studio.
I have renamed my project and it worked.
Anyway, thanks for looking into my problem.

When I create a new project In the Minimun SDK option I selected Google APIs(Google Inc)(API18) instead of API18:Android 4.3 (Jelly Bean).