Develop Reference

Unable to run Flutter project on Android after update

I've been trying to get my Flutter project to run after upgrading it to 2.10.4 and it's been a headache from the start. The project runs fine on a browser, but I'm having difficulty running on an Android emulator. I think I'm at the last hurdle, but I'm stumped right now. I'm receiving this error when running on VS Code:
FAILURE: Build failed with an exception.
* What went wrong:
Could not determine the dependencies of task ':app:compileDebugJavaWithJavac'.
> Failed to install the following SDK components:
build-tools;30.0.2 Android SDK Build-Tools 30.0.2
The SDK directory is not writable (C:\Program Files (x86)\Android\android-sdk)
Here's my Flutter Doctor:
PS D:\Documents\Flutter_Projects\glance> flutter doctor -v
[√] Flutter (Channel stable, 2.10.4, on Microsoft Windows [Version 10.0.19043.1586], locale en-US)
• Flutter version 2.10.4 at D:\Programs\flutter_windows_v1.2.1-stable\flutter
• Upstream repository https://github.com/flutter/flutter.git
• Framework revision c860cba910 (3 weeks ago), 2022-03-25 00:23:12 -0500
• Engine revision 57d3bac3dd
• Dart version 2.16.2
• DevTools version 2.9.2
[!] Android toolchain - develop for Android devices (Android SDK version 30.0.3)
• Android SDK at C:\Program Files (x86)\Android\android-sdk
• Platform android-31, build-tools 30.0.3
• ANDROID_HOME = C:\Users\reff1\AppData\Local\Android\Sdk
• ANDROID_SDK_ROOT = C:\Users\reff1\AppData\Local\Android\Sdk
• Java binary at: D:\AndroidStudio\jre\bin\java
• Java version OpenJDK Runtime Environment (build 11.0.11+9-b60-7590822)
X Android license status unknown.
Run `flutter doctor --android-licenses` to accept the SDK licenses.
See https://flutter.dev/docs/get-started/install/windows#android-setup for more details.
[√] Chrome - develop for the web
• Chrome at C:\Program Files (x86)\Google\Chrome\Application\chrome.exe
[X] Visual Studio - develop for Windows
X Visual Studio not installed; this is necessary for Windows development.
Download at https://visualstudio.microsoft.com/downloads/.
Please install the "Desktop development with C++" workload, including all of its default components
[√] Android Studio (version 2021.1)
• Android Studio at D:\AndroidStudio
• Flutter plugin can be installed from:
https://plugins.jetbrains.com/plugin/9212-flutter
• Dart plugin can be installed from:
https://plugins.jetbrains.com/plugin/6351-dart
• Java version OpenJDK Runtime Environment (build 11.0.11+9-b60-7590822)
[!] Android Studio (version 4.1)
• Android Studio at D:\Programs\AndroidStudio
• Flutter plugin can be installed from:
https://plugins.jetbrains.com/plugin/9212-flutter
• Dart plugin can be installed from:
https://plugins.jetbrains.com/plugin/6351-dart
X Unable to determine bundled Java version.
• Try updating or re-installing Android Studio.
[√] VS Code, 64-bit edition (version 1.50.1)
• VS Code at C:\Program Files\Microsoft VS Code
• Flutter extension version 3.17.0
[√] Connected device (4 available)
• sdk gphone64 x86 64 (mobile) • emulator-5554 • android-x64 • Android 12 (API 32) (emulator)
• Windows (desktop) • windows • windows-x64 • Microsoft Windows [Version 10.0.19043.1586]
• Chrome (web) • chrome • web-javascript • Google Chrome 100.0.4896.88
• Edge (web) • edge • web-javascript • Microsoft Edge 99.0.1150.46
[√] HTTP Host Availability
• All required HTTP hosts are available
Here's the part that keeps getting me. I'm seeing I need to run flutter doctor --android-licenses and this is what I get:
PS D:\Documents\Flutter_Projects\glance> flutter doctor --android-licenses
Error: Could not find or load main class Files
I have no clue where to go from here. Any help would be greatly appreciated here. Thank you in advance.

It appears that you have two sets of Android Studio and Android SDK.
[!] Android toolchain - develop for Android devices (Android SDK version 30.0.3)
• Android SDK at C:\Program Files (x86)\Android\android-sdk <--- 1
...
• ANDROID_HOME = C:\Users\reff1\AppData\Local\Android\Sdk <--- 2
[√] Android Studio (version 2021.1) <--- 1
• Android Studio at D:\AndroidStudio
...
[!] Android Studio (version 4.1) <--- 2
• Android Studio at D:\Programs\AndroidStudio
Android Studio version 4.1 is a bit older so I guess you installed it in the past and forgot about it.
Also, it is not normal (or up-to-date) to have Android SDK placed under Program Files.
This is the direct cause of the error. In Windows, writing files under Program Files requires administrator privileges.
Your system is possibly confused because you have a mixed environment with an SDK that requires administrator privileges and one that does not.
My advice is to first uninstall all of them.
Before you begin, find out where the Android Studio configuration files are stored and backup them.
It is documented in here.
Now, completely uninstall all versions of Android Studio and Android SDK, manually delete all environment variables related to Android if any, manually delete (and backup) all configuration files if the uninstaller did not, then make sure all four directories above are empty.
Next, install the latest version of Android Studio and install the Android SDK via Android Studio. At this point, make sure that the installation directory is not under Program Files or Program Files (x86). If it is, then something in the older version is still there and is doing bad things so you have to restart from the first step.
Finally, run flutter clean (just to be sure), then flutter doctor to make sure only one of each is detected.

In android studio update your sdk 30

Unable to determine bundled Java version.
• Try updating or re-installing Android Studio
See in your error in flutter doctor

Change the ownership of Android SDK:
sudo chown -R $(whoami) $ANDROID_HOME

For this issue : Android license status unknown.
Type in command prompt
flutter doctor --android-licenses
Type Yes/y/Y to accept licenses

Maybe it's an emulator specific issue, did you try to run it on a real device?
Regarding the android license issue you are getting, I guess that the system is not recognizing JAVA or it needs to be updated so please check that.
Also make sure that the emulator itself is updated and not only the android SDK, go to SDK manager and check all the dashed components:
If this didn't work, delete the emulator and create a new one, and if that didn't help, delete all instances of android studio as I see 2 on your system that might conflict the SDK path.

flutter_pdfview crashing device after opening pdf

I wanted to use flutter_pdfview in an app. During debugging everything worked fine, but once i build the app in Release mode I clicked around in the App and opened some PDF and at some pont a PDF does not load, so i got back to the page before, and at this point the touchscreen of my device does not respond any longer. I tetsted it on two devices with the arm64 version, both devices do not respond any longer at some point. However when I open the App on an armeabi device everything is working fine.
The error is: (Unhandled Exception: PlatformException(error, Neither user 10350 nor current process has android.permission.WAKE_LOCK., null)
I am using flutter_pdfview version 1.0.2+2,
my flutter doctor -v is:
• Flutter version 1.19.0-2.0.pre.142 at C:\flutter\flutter
• Framework revision 721927efd3 (7 days ago), 2020-05-21 17:52:02 -0700
• Engine revision 9ce1e5c5c7
• Dart version 2.9.0 (build 2.9.0-10.0.dev 7706afbcf5)
[√] Android toolchain - develop for Android devices (Android SDK version 29.0.2)
• Android SDK at C:\Users\Jakob\AppData\Local\Android\sdk
• Platform android-29, build-tools 29.0.2
• Java binary at: C:\Program Files\Android\Android Studio\jre\bin\java
• Java version OpenJDK Runtime Environment (build 1.8.0_202-release-1483-b03)
• All Android licenses accepted.
[√] Android Studio (version 3.5)
• Android Studio at C:\Program Files\Android\Android Studio
• Flutter plugin version 42.1.1
• Dart plugin version 191.8593
• Java version OpenJDK Runtime Environment (build 1.8.0_202-release-1483-b03)
[!] IntelliJ IDEA Community Edition (version 2019.3)
• IntelliJ at C:\Program Files\JetBrains\IntelliJ IDEA Community Edition 2019.3.4
X Flutter plugin not installed; this adds Flutter specific functionality.
X Dart plugin not installed; this adds Dart specific functionality.
• For information about installing plugins, see
https://flutter.dev/intellij-setup/#installing-the-plugins
[!] VS Code (version 1.45.1)
• VS Code at C:\Users\Jakob\AppData\Local\Programs\Microsoft VS Code
X Flutter extension not installed; install from
https://marketplace.visualstudio.com/items?itemName=Dart-Code.flutter
[!] Connected device
! No devices available
! Doctor found issues in 3 categories.

After some time, I fixed it by adding <uses-permission android:name="android.permission.WAKE_LOCK" /> to AndroidManifest.xml

My flutter app is getting stuck at "Installing build\app\outputs\apk\app.apk..." and then nothing happens

As i mentioned in the question,i cannot see anything in the console but Installing build\app\outputs\apk\app.apk... and i just cannot understand the reason because my app is working in the device. I can change the pages but the little informations that i want to see, the prints that i entered in the code are not visible and its very annoying.
Before asking here i have been looking the other questions about this problem but the answers in that questions did not worked for me so i end up asking this in here, i hope you can help me.
here is the console after i click the run button;
Launching lib\main.dart on LG H850 in debug mode...
Running Gradle task 'assembleDebug'...
√ Built build\app\outputs\apk\debug\app-debug.apk.
Installing build\app\outputs\apk\app.apk...
an here is the flutter doctor
[√] Flutter (Channel stable, v1.17.0, on Microsoft Windows [Version 10.0.18362.778], locale tr-TR)
• Flutter version 1.17.0 at C:\Users\Mahir Yakup Şahin\flutter
• Framework revision e6b34c2b5c (8 days ago), 2020-05-02 11:39:18 -0700
• Engine revision 540786dd51
• Dart version 2.8.1
[√] Android toolchain - develop for Android devices (Android SDK version 29.0.2)
• Android SDK at C:\src\Android
• Platform android-29, build-tools 29.0.2
• ANDROID_HOME = C:\src\Android
• Java binary at: C:\Program Files\Android\Android Studio\jre\bin\java
• Java version OpenJDK Runtime Environment (build 1.8.0_212-release-1586-b04)
• All Android licenses accepted.
[√] Android Studio (version 3.6)
• Android Studio at C:\Program Files\Android\Android Studio
• Flutter plugin version 45.1.1
• Dart plugin version 192.7761
• Java version OpenJDK Runtime Environment (build 1.8.0_212-release-1586-b04)
[√] VS Code (version 1.45.0)
• VS Code at C:\Users\Mahir Yakup Şahin\AppData\Local\Programs\Microsoft VS Code
• Flutter extension version 3.10.1
[√] Connected device (1 available)
• LG H850 • LGH850b31f3def • android-arm64 • Android 8.0.0 (API 26)
• No issues found!
I will be very grateful for any kind of help.
And also i tried in the vscode as well, here is the result,
enter image description here
and sometimes i get an error like this;
enter image description here

Try "flutter clean", that helps in lot many cases..seems like yours is also one of those..
Also..make sure that you have enough storage space on your device (phone or emulator, whatever you re using)..the description on the second image seems like because of the storage issue.

visual studio can't create an emulator for flutter applications

I am currently trying to run a flutter application in visual studio.
I have successfully installed android studio with some system images.
the virtual machines are successfully created in android studio.
But unfortunately those devices couldn't be detected in visual studio
And when i tried to create a new emulator in visual studio it gives this message.
Warning: Observed package id 'system-images;android-28;google_apis_playstore;x86' in inconsistent location '/usr/lib/android-sdk/system-images/android-28/google_apis/x86' (Expected '/usr/lib/android-sdk/system-images/android-28/google_apis_playstore/x86')Error: AVD not created.
so I tried to change the directory of the system image from /usr/lib/....... /google_api_playstore/x86 but it gives the same error message.
I want to note that when I use directly my phone in debugging mode. it gives this message
Launching lib/main.dart on PGN518 in debug mode...
ProcessException: Process "/home/osema/dev/android/myApps/lastapp/android/gradlew" exited abnormally:
Exception in thread "main" java.io.FileNotFoundException: /home/osema/.gradle/wrapper/dists/gradle-4.10.2-all/9fahxiiecdb76a5g3aw9oi8rv/gradle-4.10.2-all.zip.lck (Permission denied)
at java.io.RandomAccessFile.open0(Native Method)
at java.io.RandomAccessFile.open(RandomAccessFile.java:316)
at java.io.RandomAccessFile.<init>(RandomAccessFile.java:243)
at org.gradle.wrapper.ExclusiveFileAccessManager.access(ExclusiveFileAccessManager.java:49)
at org.gradle.wrapper.Install.createDist(Install.java:48)
at org.gradle.wrapper.WrapperExecutor.execute(WrapperExecutor.java:128)
at org.gradle.wrapper.GradleWrapperMain.main(GradleWrapperMain.java:61)
Command: /home/osema/dev/android/myApps/lastapp/android/gradlew -v
Exited (sigterm)
the output of flutter doctor -v
[✓] Flutter (Channel stable, v1.0.0, on Linux, locale en_US.UTF-8)
• Flutter version 1.0.0 at /home/osema/dev/android/flutter
• Framework revision 5391447fae (2 months ago), 2018-11-29 19:41:26 -0800
• Engine revision 7375a0f414
• Dart version 2.1.0 (build 2.1.0-dev.9.4 f9ebf21297)
[✓] Android toolchain - develop for Android devices (Android SDK 28.0.3)
• Android SDK at /usr/lib/android-sdk/
• Android NDK location not configured (optional; useful for native profiling support)
• Platform android-28, build-tools 28.0.3
• ANDROID_HOME = /usr/lib/android-sdk
• Java binary at: /opt/android-studio/jre/bin/java
• Java version OpenJDK Runtime Environment (build 1.8.0_152-release-1136-b06)
• All Android licenses accepted.
[✓] Android Studio (version 3.2)
• Android Studio at /opt/android-studio
• Flutter plugin version 31.3.1
• Dart plugin version 181.5656
• Java version OpenJDK Runtime Environment (build 1.8.0_152-release-1136-b06)
[✓] VS Code (version 1.30.2)
• VS Code at /usr/share/code
• Flutter extension version 2.22.3
[✓] Connected device (1 available)
• PGN518 • SG8HYDG6G66DRSPR • android-arm • Android 5.1 (API 22)

Solution:
Open C:\Users\YourUserName.android\avd\ and delete flutter_emulator.avd folder completely
Then go VS Code -> Devices -> Create New Android Device

Flutter error when lauching application on physical device

everyone.
I've installed the Flutter and I got a problem when I launch a simple application on my device.
I did from the Visual Studio Code, but didn't work. So I executed from the command line with flutter run and also didn't work. There is the output:
Launching lib/main.dart on XT1069 in debug mode...
Initializing gradle... 6.2s
Resolving dependencies... 4.5s
Gradle task 'assembleDebug'...
Gradle task 'assembleDebug'... Done 11.6s
Built build/app/outputs/apk/debug/app-debug.apk.
Installing build/app/outputs/apk/app.apk... 5.0s
Error: ADB exited with exit code 1
Error launching application on XT1069.
I also tried the command flutter clean before run. No success.
The flutter doctor full log:
[✓] Flutter (Channel beta, v0.9.4, on Linux, locale en_US.UTF-8)
• Flutter version 0.9.4 at /home/valdinei/dev/flutter
• Framework revision f37c235c32 (4 weeks ago), 2018-09-25 17:45:40 -0400
• Engine revision 74625aed32
• Dart version 2.1.0-dev.5.0.flutter-a2eb050044
[✓] Android toolchain - develop for Android devices (Android SDK 28.0.3)
• Android SDK at /home/valdinei/Android/Sdk
• Android NDK location not configured (optional; useful for native profiling support)
• Platform android-28, build-tools 28.0.3
• Java binary at: /home/valdinei/dev/android-studio/jre/bin/java
• Java version OpenJDK Runtime Environment (build 1.8.0_152-release-1136-b06)
• All Android licenses accepted.
[✓] Android Studio (version 3.2)
• Android Studio at /home/valdinei/dev/android-studio
• Flutter plugin version 29.1.1
• Dart plugin version 181.5656
• Java version OpenJDK Runtime Environment (build 1.8.0_152-release-1136-b06)
[✓] VS Code (version 1.28.2)
• VS Code at /usr/share/code
• Flutter extension version 2.19.0
[✓] Connected devices (1 available)
• XT1069 • 0013848438 • android-arm • Android 6.0 (API 23)
• No issues found!
PS: My device is already on debug mode and the screen even "wake up" when I try the command to run.
My application is the default that came when I created the project.
OS: Linux Mint 18.3
I hope you can help me. Thanks!