How to deactivate or override the Android “BACK” button, in Flutter?

The answer is WillPopScope. It will prevent the page from being popped by the system. You’ll still be able to use Navigator.of(context).pop() @override Widget build(BuildContext context) { return new WillPopScope( onWillPop: () async => false, child: new Scaffold( appBar: new AppBar( title: new Text(“data”), leading: new IconButton( icon: new Icon(Icons.ac_unit), onPressed: () => Navigator.of(context).pop(), ), … Read more

Flutter plugin not installed error; When running ‘flutter doctor’

Safe fix for Mac (Android Studio 4.1+). It is in a different directory now, but the symbolic link helps. Just run this command in the Terminal: ln -s ~/Library/Application\ Support/Google/AndroidStudio4.1/plugins ~/Library/Application\ Support/AndroidStudio4.1 If you have a different Android Studio version or an installation folder, adjust the command accordingly.

Flutter: upgrade the version code for play store

Update version:A.B.C+X in pubspec.yaml. For Android: A.B.C represents the versionName such as 1.0.0. X (the number after the +) represents the versionCode such as 1, 2, 3, etc. Do not forget to execute flutter build apk or flutter run after this step, because: When you run flutter build apk or flutter run after updating this … Read more

How can I check if a Flutter application is running in debug?

In later versions, you can use kDebugMode: if (kDebugMode) doSomething(); While asserts can technically be used to manually create an “is debug mode” variable, you should avoid that. Instead, use the constant kReleaseMode from package:flutter/foundation.dart The difference is all about tree shaking. Tree shaking (aka the compiler removing unused code) depends on variables being constants. … Read more

There are multiple heroes that share the same tag within a subtree

I have encountered this before, and it was because I had two FloatingAction buttons on one screen, I had to add a heroTag property + value per FloatingActionButton in order for the error to go away. Example: FloatingActionButton( heroTag: “btn1”, … ) FloatingActionButton( heroTag: “btn2”, … ) From the example code you provided it doesn’t … Read more

Flutter- wrapping text [duplicate]

The Flexible does the trick new Container( child: Row( children: <Widget>[ Flexible( child: new Text(“A looooooooooooooooooong text”)) ], )); This is the official doc https://flutter.dev/docs/development/ui/layout#lay-out-multiple-widgets-vertically-and-horizontally on how to arrange widgets. Remember that Flexible and also Expanded, should only be used within a Column, Row or Flex, because of the Incorrect use of ParentDataWidget. The solution … Read more

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