Develop Reference

Flutter won't compile on ios nor android. Empty project wont compile

Soo... everything worked fine then after taking a break from work apps wont run.
New or empty project it does not matter.
Flutter doctor says everything is fine.
Here is Debug console.
Launching lib/main.dart on iPhone 14 Pro Max in debug mode...
lib/main.dart:1
Xcode build done. 3.8s
Failed to build iOS app
Error output from Xcode build:
↳
** BUILD FAILED **
Xcode's output:
↳
Writing result bundle at path:
/var/folders/bm/_wgnp7b94l78gc2g88cq3kbc0000gn/T/flutter_tools.MW6UxN/flutter_ios_build_temp_dirktvpW1/temporary_xcresult_bundle
/Applications/flutter/packages/flutter/lib/src/widgets/ticker_provider.dart:186:7: Error: 'ethrow' isn't a type.
ethrow FlutterError.fromParts(<DiagnosticsNode>[
^^^^^^
/Applications/flutter/packages/flutter/lib/src/widgets/ticker_provider.dart:186:14: Error: Expected ';' after this.
ethrow FlutterError.fromParts(<DiagnosticsNode>[
^^^^^^^^^^^^
/Applications/flutter/packages/flutter/lib/src/widgets/ticker_provider.dart:186:26: Error: Expected an identifier, but got '.'.
Try inserting an identifier before '.'.
ethrow FlutterError.fromParts(<DiagnosticsNode>[
^
/Applications/flutter/packages/flutter/lib/src/widgets/ticker_provider.dart:195:6: Error: A value of type 'bool?' can't be assigned to a variable of type 'bool' because 'bool?' is nullable and 'bool' isn't.
}());
^
Failed to package /Users/stankoo003/minimal_design.
Command PhaseScriptExecution failed with a nonzero exit code
note: Building targets in dependency order
warning: Run script build phase 'Thin Binary' will be run during every build because it does not specify any outputs. To address this warning, either add output dependencies to the script phase, or configure it to run in every build by unchecking "Based on dependency analysis" in the script phase. (in target 'Runner' from project 'Runner')
warning: Run script build phase 'Run Script' will be run during every build because it does not specify any outputs. To address this warning, either add output dependencies to the script phase, or configure it to run in every build by unchecking "Based on dependency analysis" in the script phase. (in target 'Runner' from project 'Runner')
Result bundle written to path:
/var/folders/bm/_wgnp7b94l78gc2g88cq3kbc0000gn/T/flutter_tools.MW6UxN/flutter_ios_build_temp_dirktvpW1/temporary_xcresult_bundle
Could not build the application for the simulator.
Error launching application on iPhone 14 Pro Max.
Exited
flutter doctor, empty projects..

This shows a problem in Flutter's TickerProvider class.
It might be a version problem. Try flutter upgrade.
Clean your project flutter clean then flutter pub get and try building again.

mobile App with ionic

hello
I am trying to build hybrid app with ionic and cordova
at first i run below commands and they run successfully
but after running the last command i get this error
ionic start firtApp
cd firtApp
ionic platform add android
note: it return me android-21 error, and i changed the android-21 to android-18, and it runs successfully
ionic build android
after running the above command i got this error
BUILD FAILED
D:\New folder\android-sdk-final\android-sdk-fully\sdk\tools\ant\build.xml:601: T
he following error occurred while executing this line:
D:\New folder\android-sdk-final\android-sdk-fully\sdk\tools\ant\build.xml:542: U
nable to resolve project target 'android-21'
Total time: 1 second
C:\Users\Mohammad\firstapp\platforms\android\cordova\node_modules\q\q.js:126
throw e;
^
Error code 1 for command: cmd with args: /s /c "ant debug -f C:\Users\Mohammad\f
irstapp\platforms\android\build.xml -Dout.dir=ant-build -Dgen.absolute.dir=ant-g
en"
ERROR building one of the platforms: Error: C:\Users\Mohammad\firstapp\platforms
\android\cordova\build.bat: Command failed with exit code 8
You may not have the required environment or OS to build this project
Error: C:\Users\Mohammad\firstapp\platforms\android\cordova\build.bat: Command f
ailed with exit code 8
at ChildProcess.whenDone (C:\Users\Mohammad\AppData\Roaming\npm\node_modules
\cordova\node_modules\cordova-lib\src\cordova\superspawn.js:131:23)
at ChildProcess.emit (events.js:98:17)
at maybeClose (child_process.js:756:16)
at Process.ChildProcess._handle.onexit (child_process.js:823:5)
please help me with this error
i really like to bulid hybrid apps with my web knowledge
thanks.

You can try this
Go to this directory
C:\Users\Mohammad\.cordova\lib\npm_cache\cordova-android\3.6.4\package\framework
Edit project.properties file. Change target to 19.
# This file is automatically generated by Android Tools.
# Do not modify this file -- YOUR CHANGES WILL BE ERASED!
#
# This file must be checked in Version Control Systems.
#
# To customize properties used by the Ant build system use,
# "ant.properties", and override values to adapt the script to your
# project structure.
# Indicates whether an apk should be generated for each density.
split.density=false
# Project target.
target=android-19
apk-configurations=
renderscript.opt.level=O0
android.library=true
Restart your terminal.

You don't have SDK correctly installed on you computer. (Path or SDK update)
It's write on your error log : You may not have the required environment or OS to build this project

you just need to install ant
sudo apt-get install ant
then do the same as before,its work correctly

Cordova Android Build

I am attempting to use the emulator via Phonegap, upon following these instructions in order to build the app. It fist tells me that I dont have Android installed as a platform, but I do have the Android sdk, of which I then made sure that the path was correct following these instructions, .
I then attempt to check platforms, and receive error that no platforms installed.
I then skipped to building the app, just to see what would happen, and receive this:
C:\Users\Jessica.PORTER\hello>cordova platform add android
Creating android project...
C:\Users\Jessica.PORTER\.cordova\lib\npm_cache\cordova-android\3.6.4
\node_modules\q\q.js:126
throw e;
^
Error: ANDROID_HOME is not set and "android" command not in your PAT
fulfill at least one of these conditions.
at C:\Users\Jessica.PORTER\.cordova\lib\npm_cache\cordova-androi
age\bin\lib\check_reqs.js:159:19
at _fulfilled (C:\Users\Jessica.PORTER\.cordova\lib\npm_cache\co
d\3.6.4\package\bin\node_modules\q\q.js:798:54)
at self.promiseDispatch.done (C:\Users\Jessica.PORTER\.cordova\l
\cordova-android\3.6.4\package\bin\node_modules\q\q.js:827:30)
at Promise.promise.promiseDispatch (C:\Users\Jessica.PORTER\.cor
_cache\cordova-android\3.6.4\package\bin\node_modules\q\q.js:760:13)
at C:\Users\Jessica.PORTER\.cordova\lib\npm_cache\cordova-androi
age\bin\node_modules\q\q.js:821:14
at flush (C:\Users\Jessica.PORTER\.cordova\lib\npm_cache\cordova
.4\package\bin\node_modules\q\q.js:108:17)
at process._tickCallback (node.js:442:13)
at Function.Module.runMain (module.js:499:11)
at startup (node.js:119:16)
at node.js:929:3
Error: C:\Users\Jessica.PORTER\.cordova\lib\npm_cache\cordova-androi
age\bin\create.bat: Command failed with exit code 8
at ChildProcess.whenDone (C:\Users\Jessica.PORTER\AppData\Roamin
odules\cordova\node_modules\cordova-lib\src\cordova\superspawn.js:13
at ChildProcess.emit (events.js:98:17)
at maybeClose (child_process.js:766:16)
at Process.ChildProcess._handle.onexit (child_process.js:833:5)

As you can still see from
Error: ANDROID_HOME is not set and "android" command not in your PATH
It clearly tells you that you haven't set the ANDROID_HOME and that the android command isn't found from your PATH. To fix it, locate the Android SDK installation location and at it to the PATH. Also, open new command line instance after adding them since they are only loaded at the boot-time of command line.
You can also check if the android command is correctly added to PATH by opening the command line and simply typing android. If it tells you something like no such program, it means that it isn't still available.

Changing ANdroid Home -
I fixed the problem by adding a new Environment Variable named ANDROID_SDK_HOME and then linked it to Android folder C:\Program Files (x86)\Android
Thank you for all your help!!!!

Cannot build cordova project successfully error while executing ant debug command

I was having an error that is Camera not successful invoked on first try (click) so I tried this solution on stackoverflow Phonegap(3.0.0) Camera not successful on first try.
I followed the steps as mentioned in the answer removed android by cordova platform remove android then I run the second command cordova platform add android ;
Now when I use netbeans to run the cordova application on cordova android decvice this error occurs:
exec: ant debug -f "/var/www/mobile/platforms/android/build.xml"
[ 'ant debug -f "/var/www/mobile/platforms/android/build.xml"',
{ [Error: Command failed:
BUILD FAILED
/var/www/adt-bundle-linux-x86_64-20130917/sdk/tools/ant/build.xml:720: The following error occurred while executing this line:
/var/www/adt-bundle-linux-x86_64-20130917/sdk/tools/ant/build.xml:734: Compile failed; see the compiler error output for details.
Total time: 8 seconds
] killed: false, code: 1, signal: null },
'Buildfile: /var/www/mobile/platforms/android/build.xml\n\n-set-mode-check:\n\n-set-debug-files:\n\n-check-env:\n [checkenv] Android SDK Tools Revision 22.3.0\n [checkenv]
.
.
.**LONG TEXT which I removed from the post **
.
\nBUILD FAILED\n/var/www/adt-bundle-linux-x86_64-20130917/sdk/tools/ant/build.xml:720:
The following error occurred while executing this line:\n/var/www/adt-bundle-linux-x86_64- 20130917/sdk/tools/ant/build.xml:734:
Compile failed; see the compiler error output for details.\n\nTotal time: 8 seconds\n' ]
Error executing "ant debug -f "/var/www/mobile/platforms/android/build.xml"":
BUILD FAILED
/var/www/adt-bundle-linux-x86_64-20130917/sdk/tools/ant/build.xml:720: The following error occurred while executing this line:
/var/www/adt-bundle-linux-x86_64-20130917/sdk/tools/ant/build.xml:734: Compile failed; see the compiler error output for details.
Total time: 8 seconds
child_process.spawn(/var/www/mobile/platforms/android/cordova/build,[]) = 2
/usr/local/lib/node_modules/cordova/node_modules/q/q.js:126
throw e;
Error: An error occurred while building the android project.Error executing "ant debug -f "/var/www/mobile/platforms/android/build.xml"":
BUILD FAILED
/var/www/adt-bundle-linux-x86_64-20130917/sdk/tools/ant/build.xml:720: The following error occurred while executing this line:
/var/www/adt-bundle-linux-x86_64-20130917/sdk/tools/ant/build.xml:734: Compile failed; see the compiler error output for details.
Total time: 8 seconds
at ChildProcess.<anonymous> (/usr/local/lib/node_modules/cordova/src/compile.js:65:22)
at ChildProcess.EventEmitter.emit (events.js:98:17)
at maybeClose (child_process.js:735:16)
at Socket.<anonymous> (child_process.js:948:11)
at Socket.EventEmitter.emit (events.js:95:17)
at Pipe.close (net.js:466:12)
/var/www/mobile/nbproject/build.xml:256: exec returned: 8
BUILD FAILED (total time: 4 minutes 36 seconds)
any idea about this problem?

I was having a similar issue. I ran ant debug -f "/path/to/project/build.xml" from a separate terminal. It displayed a more specific description of the error (which for me wast that there was a space in the project name). This answer also notes:
config.xml can't have a widget id with number as a first character
after a dot. For example: com.42myapp.test or com.myapp.42test won't
work as well as 42com.myapp.test. It will trigger an error from the
compiler.

I was facing similar issues when i started using the CLI to build apps using cordova and started checking the internet for solutions. While i was at it, i discovered the following things that may help you or anyone else facing the same problem can take some hints from this:
These are some very basic checks that you need to take
1. make sure you have all the required sdk's in place (ANT, Java, Android) and is available when you use these commands on the terminal/command $ ant $ java $ adt. if any of these commands are not found, then you need to get it installed or get the class paths fixed.
make sure your project path does not have spaces. i.e. do not have spaces or special characters in directory names. this issue seems to have been fixed on latest versions of cordova and phonegap, but either cases it is a good practice to follow as ant and java paths could be dependent on the folder names you make.
use -d or -v to get extra debug information on the build process to know where and what is causing the issue. $ cordova build android -d or $ cordova build android -v
Make sure you dont use "#" as the link attribute of author tag in the cordova config.xml on the root of the project. This expects the compiler to interpret a hexadecimal color and fails the build. (this was my problem)
Hope this helps.
er... Happy debugging??

Make sure your Ant is 1.8.0 or later version. Cordova 3.3 demands that.

In the past several days, I found that the conflicting files from Dropbox had a very long name. After renaming it, everything worked.

scala-android plugin

I'm having problems running the scala-android plugin when running sbt from inside IntelliJ. When I run sbt for the same project from Mac terminal I get no errors:
~/Documents/my-android-project $ sbt
[info] Loading global plugins from /Users/rgoodwin/.sbt/plugins
[info] Loading project definition from /Users/rgoodwin/Documents/my-android-project/project
[info] Set current project to (in build file:/Users/rgoodwin/Documents/my-android-project/)
But when I try to run sbt from IntelliJ I get:
[info] Loading global plugins from /Users/rgoodwin/.sbt/plugins
[info] Loading project definition from /Users/rgoodwin/Documents/my-android-project/project
[error] Android SDK not found. You might need to set ANDROID_SDK_HOME or ANDROID_SDK_ROOT or ANDROID_HOME
[error] Use 'last' for the full log.
Project loading failed: (r)etry, (q)uit, (l)ast, or (i)gnore?
Why doesn't sbt inside of IntelliJ pick up the Path names I have set?

I think that you have probably set ANDROID_SDK_HOME in your .bashrc file so this property is set when you run sbt.
When you run Intellij, you don't launch it from command line so the ANDROID_SDK_HOME is not defined when you run sbt from Intellij.
For MacOS, I think that you can set global environment variables (take a look at http://developer.apple.com/library/mac/#documentation/MacOSX/Conceptual/BPRuntimeConfig/Articles/EnvironmentVars.html).