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 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 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 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 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 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 {