aduquet

  I got this solve by changing the versionCode Does not admit floats, and the versionName, I have not try modifying one a let the other tho
  
  defaultConfig {
        applicationId "your.applicationId"
        minSdkVersion 23
        targetSdkVersion 30
        versionCode 1 // Change to a higher number
        versionName "1.0.1" // Change to a higher number
        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
        javaCompileOptions {

aduquet

I was getting this error after updateing dart and flutter project

android:exported needs to be explicitly specified for element 
<activity#androidx.test.core.app.InstrumentationActivityInvoker$EmptyFloatingActivity>. 
Apps targeting Android 12 and higher are required to specify an explicit value for android:exported 
when the corresponding component has an intent filter defined. 
See https://developer.android.com/guide/topics/manifest/activity-element#exported for details. 
FAILURE: Build failed with an exception.

After searching and trying many things, adding these other activities solved the problem:

aduquet

I was struggling in finding a way to load async data on Initial State method

I found the answer here: https://stackoverflow.com/questions/51901002/is-there-a-way-to-load-async-data-on-initstate-method

This is my concrete example

  setInitialValueQuestionReview() async {
    late DocumentReference<Map<String, dynamic>> testAnwDB = FirebaseFirestore
        .instance
        .collection('AppUsers')

aduquet

I got this error:

C:\Users\duquet\.jdks\openjdk-15.0.1\bin\java.exe "-javaagent:C:\Program Files\JetBrains\IntelliJ IDEA Community Edition 2020.2.3\lib\idea_rt.jar=53726:C:\Program Files\JetBrains\IntelliJ IDEA Community Edition 2020.2.3\bin" -Dfile.encoding=UTF-8 -classpath C:\Users\duquet\AppData\Roaming\JetBrains\IdeaIC2021.2\plugins\pit-idea-plugin\lib\pitest-junit5-plugin-0.15.jar;C:\Users\duquet\AppData\Roaming\JetBrains\IdeaIC2021.2\plugins\pit-idea-plugin\lib\xpp3_min-1.1.4c.jar;C:\Users\duquet\AppData\Roaming\JetBrains\IdeaIC2021.2\plugins\pit-idea-plugin\lib\xmlpull-1.1.3.1.jar;C:\Users\duquet\AppData\Roaming\JetBrains\IdeaIC2021.2\plugins\pit-idea-plugin\lib\xstream-1.4.8.jar;C:\Users\duquet\AppData\Roaming\JetBrains\IdeaIC2021.2\plugins\pit-idea-plugin\lib\pitest-entry-1.7.4.jar;C:\Users\duquet\AppData\Roaming\JetBrains\IdeaIC2021.2\plugins\pit-idea-plugin\lib\pitest-command-line-1.7.4.jar;C:\Users\duquet\AppData\Roaming\JetBrains\IdeaIC2021.2\plugins\pit-idea-plugin\lib\pitest-1.7.4.jar;C:\User

aduquet

I had this problem, working with flutter and firebase

"No Firebase App '[DEFAULT]' has been created - call Firebase.initializeApp() in Flutter and Firebase"


What I did to solve it was: 

1. update firebase_core in the pubspec.yaml
2. I force the firebase to initialize before proceed whit this two lines

aduquet

I got an exceotion with 'type 'Null' is not a subtype of type 'String' ' in flutter

════════ Exception caught by widgets library ═══════════════════════════════════
type 'Null' is not a subtype of type 'String'
════════════════════════════════════════════════════════════════════════════════

The problem was that my json file has some interger. then, I just fixed my json file with all strings :D and done!

aduquet

I was dealing with 

type 'Future<dynamic>' is not a subtype of type 'Stream<Object?>?'

I had no Future types in my app however I did have something like this:

  getQuestion(String id, String collectionName) async {
    //var collection = FirebaseFirestore.instance.collection(collectionName);
    // var querySnapshots = await collection.get();
    // for (var snapshot in querySnapshots.docs) {

aduquet

I spend a lot of time trying to access a specific document from firebase DB with flutter. 

This is some links that help me 

https://stackoverflow.com/questions/53517382/query-a-single-document-from-firestore-in-flutter-cloud-firestore-plugin

https://stackoverflow.com/questions/67575893/the-method-cant-be-unconditionally-invoked-because-the-receiver-can-be-nu

https://stackoverflow.com/questions/69624553/flutter-error-the-operator-isnt-defined-for-the-class-object

aduquet

C:\Users\duquet\Documents\Personal\Empresa\quiz-flutter\quiz_app_v2\quiz\android\app\src\debug\AndroidManifest.xml Error:
	uses-sdk:minSdkVersion 16 cannot be smaller than version 19 declared in library [:cloud_firestore] C:\Users\duquet\Documents\Personal\Empresa\quiz-flutter\quiz_app_v2\quiz\build\cloud_firestore\intermediates\library_manifest\debug\AndroidManifest.xml as the library might be using APIs not available in 16
	Suggestion: use a compatible library with a minSdk of at most 16,
		or increase this project's minSdk version to at least 19,
		or use tools:overrideLibrary="io.flutter.plugins.firebase.firestore" to force usage (may lead to runtime failures)

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':app:processDebugMainManifest'.

aduquet

Well, this error may looks silly, but I spent a lot of hours looking for the answer 

after excecuting the command "yo code"
I got this error:
  c:\Users\blalbalba\npm\node_modules\yo\node_modules\execa\index.js:347
    thorw err;

and a lot of more things. The mos important was this error line

stderr: "'powershell' is not recognized as an internal or external command,\r\n" +     'operable program or batch file.\r\n',