flutter-layout

问题 I'm trying to create a Row widget that will be pinned to the bottom always like the below screenshot. I currently have a large container containing text (open to changing this to a card) followed by smaller cards which are scrollable. I would like to pin a bar to the bottom so a user can enter text and add a card. I'm not sure how to pin this to the bottom of the UI without interfering with the cards causing a pixel overflow. What is the best way to achieve this? I'd ideally like to achieve a

问题 so i got the error below after upgrading flutter on master, building for web. Apart from upgrading flutter I didn't change anything. Switching branches and upgrading flutter again did not seem to work, as well as flutter clean and pub upgrade/ packages get. [+5273 ms] ══╡ EXCEPTION CAUGHT BY WIDGETS LIBRARY ╞═══════════════════════════════════════════════════════════ [ +318 ms] The following assertion was thrown building InputDecorator(decoration: InputDecoration(hintMaxLines: [ +104 ms] "1",

问题 I'm making a custom logic for showing ads in my app, so when the user opens the app after 1 min pops up an ad then supposed this 1 min to get increased by 1 min every time, So x be 2 then 3 then 4 ...etc. I tried to do so, but didn't work for me ( showing the ad every 1 min not increase it ); int x = 1; Timer.periodic(Duration(minutes: x), (timer) { x = x + 1; interstitialAd.load(); }); 回答1: I think you cannot do it. You can alternatively cancel the current timer and start a new timer based

问题 I'm making a custom logic for showing ads in my app, so when the user opens the app after 1 min pops up an ad then supposed this 1 min to get increased by 1 min every time, So x be 2 then 3 then 4 ...etc. I tried to do so, but didn't work for me ( showing the ad every 1 min not increase it ); int x = 1; Timer.periodic(Duration(minutes: x), (timer) { x = x + 1; interstitialAd.load(); }); 回答1: I think you cannot do it. You can alternatively cancel the current timer and start a new timer based

问题 I want to do this : But here is what I actually got : Here is my code : Row itemTransaction(BuildContext context, Transaction transaction) { /// This is the function that will build each item of our transaction list. return new Row( children: <Widget>[ new Container( width: MediaQuery.of(context).size.width / 6, height: MediaQuery.of(context).size.width / 6, child: new Image.asset( (transaction.sent) ? "images/tx_output.png" : "images/tx_input.png", ), ), new Column( children: <Widget>[ new

问题 I am trying to convert this hash color code #159424 (GREEN-COLOR) to more darken and lighten programmatically. How to do this please help? make green color darker toDarkColor(String hashColor){ // how to convert that hash string to make green color darker? } make green color lighter toLightColor(String hashColor){ // how to convert that hash string to make green color lighter? } 回答1: You can use tinycolor package: TinyColor.fromString("#159424").darken(10).color Edit: You can convert Color

问题 I have created a form in with formkey and and form data variable as Map<String, String> _formdata = {}; formdata contains field such as profile data. Among those there is a field say Pets, It has two fields name and age. I want to add a button that will allow user to add more pets. This form should be visible only when clicking the button. User can add multiple pets by clicking this button. class MyPets extends StatefulWidget { @override _MyPetsState createState() => _MyPetsState(); } class

问题 How do I get two side-by-side Text widgets to only allow the left-most one to overflow gracefully? One text widget in a column is easy to overflow gracefully. Two text widgets side-by-side in a row is problematic. Stack overflow wants more details but honestly I'm probably just wasting more of your time at this point. Widget _listItem({String title, String subtitle}){ return Row( children: <Widget>[ _listItemIcon(), Expanded( child: Column( crossAxisAlignment: CrossAxisAlignment.start,

问题 How do I get two side-by-side Text widgets to only allow the left-most one to overflow gracefully? One text widget in a column is easy to overflow gracefully. Two text widgets side-by-side in a row is problematic. Stack overflow wants more details but honestly I'm probably just wasting more of your time at this point. Widget _listItem({String title, String subtitle}){ return Row( children: <Widget>[ _listItemIcon(), Expanded( child: Column( crossAxisAlignment: CrossAxisAlignment.start,

问题 I want to put opacity for container which contain hexadecimal color code. I am new to flutter. Please help me. Here is the code. Thanks in advance. final body = Container( width: MediaQuery.of(context).size.width, margin: const EdgeInsets.only(left: 40.0, right: 40.0), padding: EdgeInsets.all(28.0), decoration: new BoxDecoration( color: const Color(0xFF0E3311),//here i want to add opacity border: new Border.all(color: Colors.black54, ), borderRadius: new BorderRadius.only( topLeft: const