Flutter Notes (Week 2, Sep 2020)

Ques: How to fix initialization error for DefaultKotlinSourceSetKt?
  Error: Could not initialize class org.jetbrains.kotlin.gradle.plugin.sources.DefaultKotlinSourceSetKt

Answer:
This error comes on upgrading Android Studio (from October 2019 Release to Sep, 2020 (v4.0.1)) and the SDK Components.

On updating the Kotlin version on Android Studio -> Tools -> Kotlin -> Check For Update.

Then make changes on Kotlin Version as below on build.gradle 



After changing: ext.kotlin_version = '1.3.72'
Old value: 1.3.10

Issues appearing in "Build" process logs:


1.
  Deprecation Warning for 'Android Gradle' plugin:
  
  WARNING: API 'variant.getMergeAssets()' is obsolete and has been replaced with 'variant.getMergeAssetsProvider()'.
  It will be removed in version 5.0 of the Android Gradle plugin.
  For more information, see https://d.android.com/r/tools/task-configuration-avoidance.
  To determine what is calling variant.getMergeAssets(), use -Pandroid.debug.obsoleteApi=true on the command line to display more information.
  WARNING: API 'variantOutput.getProcessResources()' is obsolete and has been replaced with 'variantOutput.getProcessResourcesProvider()'.
  It will be removed in version 5.0 of the Android Gradle plugin.
  For more information, see https://d.android.com/r/tools/task-configuration-avoidance.
  To determine what is calling variantOutput.getProcessResources(), use -Pandroid.debug.obsoleteApi=true on the command line to display more information. 

  
2.
 > Task :app:compileFlutterBuildDebugArm
  ╔====
  ║ A new version of Flutter is available!
  ║
  ║ To update to the latest version, run "flutter upgrade".
  ╚====

  C:\Users\Ashish Jain>flutter --version
  Waiting for another flutter command to release the startup lock...
  Flutter 1.9.1+hotfix.2 • channel stable • https://github.com/flutter/flutter.git
  Framework • revision 2d2a1ffec9 (1 year, 1 month ago) • 2019-09-06 18:39:49 -0700
  Engine • revision b863200c37
  Tools • Dart 2.5.0 


3. 

  Manifest merger failed : Overlay manifest:package attribute declared at AndroidManifest.xml:2:5-37 value=(com.survival8.survival) has a different value=(com.survival8.one) declared in main manifest at AndroidManifest.xml:2:5-32
  	Suggestion: remove the overlay declaration at AndroidManifest.xml 	and place it in the build.gradle:
  		flavorName {
  			applicationId = "com.survival8.survival"
  		} 
  



4.
  On replacing the entire code from a back-up of code developed on 'Ubuntu':
  "\home\administrator\flutter" was our path in Ubuntu machine.
    Error:
    C:\Users\Ashish Jain\AndroidStudioProjects\survival\android\app\home\administrator\flutter\packages\flutter_tools\gradle\flutter.gradle (The system cannot find the path specified) 
  


We have a "local.properties" file with contents:
Path: C:\Users\Ashish Jain\AndroidStudioProjects\survival\android\local.properties
Contents from Ubuntu back-up code:

  ## This file must *NOT* be checked into Version Control Systems,
  # as it contains information specific to your local configuration.
  #
  # Location of the SDK. This is only used by Gradle.
  # For customization when using a Version Control System, please read the header note.
  # Mon Sep 21 19:31:06 IST 2020
  flutter.buildMode=release
  flutter.versionName=1.0.0
  flutter.sdk=/home/administrator/flutter
  sdk.dir=C\:\\Users\\Ashish Jain\\AppData\\Local\\Android\\Sdk
  flutter.versionCode=1 

Here, we need to change the property "flutter.sdk" according to our current system.

  --> flutter.sdk=E\:\\programfiles\\flutter

  C:\Users\Ashish Jain\AndroidStudioProjects>flutter upgrade
  Flutter 1.20.4 • channel stable • https://github.com/flutter/flutter.git
  Framework • revision fba99f6cf9 (7 days ago) • 2020-09-14 15:32:52 -0700
  Engine • revision d1bc06f032
  Tools • Dart 2.9.2
  
  Running flutter doctor...
  Doctor summary (to see all details, run flutter doctor -v):
  [√] Flutter (Channel stable, 1.20.4, on Microsoft Windows [Version 10.0.18363.1082], locale en-US)
  [!] Android toolchain - develop for Android devices (Android SDK version 29.0.2)
      X Android license status unknown.
        Try re-installing or updating your Android SDK Manager.
        See https://developer.android.com/studio/#downloads or visit https://flutter.dev/docs/get-started/install/windows#android-setup for detailed instructions.
  [√] Android Studio (version 4.0) 
  
  C:\Users\Ashish Jain\AndroidStudioProjects>flutter --version
  Flutter 1.20.4 • channel stable • https://github.com/flutter/flutter.git
  Framework • revision fba99f6cf9 (7 days ago) • 2020-09-14 15:32:52 -0700
  Engine • revision d1bc06f032
  Tools • Dart 2.9.2 




5.

When opening a project, open the "android" folder and not the parent directory such as "survival" or "survival8".




6.
  Where to view the Gradle version running:




7.
  Way to clone 'stable' Flutter GitHub repository:
  $ git clone -b stable https://github.com/flutter/flutter.git