// small app written using the flutter sdk // tracks your water intake // language is dart (pretty productive, actually) // if anything looks weird, blame dartfmt // will definitely not run in sololearn // i am considering getting a developer's liscence for gp import "package:flutter/material.dart"; import "dart:io"; import "dart:async"; import "package:path_provider/path_provider.dart"; import "./about.dart" as About; import "./app_settings.dart" as AppSettings; void main() => runApp(new MyApp()); class MyApp extends StatelessWidget { @override Widget build(BuildContext context) { return new MaterialApp( title: "Hydrogen Hydroxide", theme: new ThemeData( primarySwatch: Colors.blueGrey, ), home: new DihydrogenMonoxide(), // about and settings routes routes: { "/a": (BuildContext context) => new About.About(), "/b": (BuildContext context) => new AppSettings.AppSettings(), }, ); } } class DihydrogenMonoxide extends StatefulWidget { final String title = "Hydrogen Hydroxide"; @override DihydrogenMonoxideState createState() => new DihydrogenMonoxideState(); } class DihydrogenMonoxideState extends State { int waterDrankAmount = 0; double waterDrankPercent = 0.5; static int waterGoal = 2000; double changeAmount; // increases progress towards goal void _incrementWater() { var change = changeAmount ?? 0; change = change.toInt(); setState(() { waterDrankAmount += change; }); writeDataToFile([waterDrankAmount, waterGoal]); } // removes progress towards goal void _decrementWater() { var change = changeAmount ?? 0; change = change.toInt(); setState(() { if (waterDrankAmount - change < 0) { waterDrankAmount = 0; } else { waterDrankAmount -= change; } }); writeDataToFile([waterDrankAmount, waterGoal]); } // obtains app's files asynchronously static Future> _getLocalFiles() async { String dir = (await getApplicationDocumentsDirectory()).path; return [new File("$dir/wd_data.txt"), new File("$dir/wg_data.txt")]; } // obtains values from app's files Future> readFile() async { try { List files = await _getLocalFiles(); List values = files.map((File file) => file.readAsStringSync()).toList(); return values.map((String s) => int.parse(s)).toList(); } on FileSystemException { return [0, 2000]; } } // writes values to app's local files static void writeDataToFile(List values) async { List files = await _getLocalFiles(); for (int i = 0; i < files.length; i++) { if (values[i] != null) { await files[i].writeAsString(values[i].toString()); } } } // overridden to initialize values from app's files @override void initState() { super.initState(); readFile().then((List values) { setState(() { waterDrankAmount = values[0]; waterGoal = values[1]; waterDrankPercent = waterDrankAmount / waterGoal; }); }); } @override Widget build(BuildContext context) { return new Scaffold( appBar: new AppBar( title: new Text("Hydrogen Hydroxide"), actions: [ // settings button on right of appbar new IconButton( icon: new Icon(Icons.settings), onPressed: () => Navigator.of(context).pushNamed("/b"), ), ], ), drawer: new Drawer( child: new ListView( children: [ new Padding( padding: const EdgeInsets.only(top: 32.0), // home menu item child: new ListTile( leading: new Icon(Icons.home), title: new Text("Home"), dense: true, onTap: () { Navigator.pop(context); }, ), ), // about item new ListTile( leading: new Icon(Icons.info), title: new Text("About"), dense: true, onTap: () { Navigator.of(context).pushNamed("/a"); }, ), ], ), ), body: new Container( padding: const EdgeInsets.all(16.0), child: new Column( children: [ new Padding( padding: const EdgeInsets.only(top: 16.0), // progress bar shows current water consumption progress child: new LinearProgressIndicator( value: waterDrankAmount / waterGoal < 1.0 ? waterDrankAmount / waterGoal : 1.0), ), // text shows current amount of water drank out of the goal new Text("\n$waterDrankAmount/$waterGoal mL"), new Row( children: [ new Expanded( // text field allows user to gain/lose progress child: new TextField( keyboardType: TextInputType.number, decoration: new InputDecoration(hintText: "mL"), onChanged: (String value) { changeAmount = double.parse(value); }, ), ), new Container( child: new Row( children: [ new Padding( padding: const EdgeInsets.fromLTRB(8.0, 4.0, 4.0, 4.0), child: new SizedBox( width: 40.0, height: 40.0, // button adds progress towards the goal child: new RaisedButton( child: new Text("+", style: new TextStyle( fontWeight: FontWeight.bold)), onPressed: _incrementWater), ), ), new Padding( padding: const EdgeInsets.only(left: 4.0), child: new SizedBox( width: 40.0, height: 40.0, // button removes progress from the goal child: new RaisedButton( child: new Text("-", style: new TextStyle( fontWeight: FontWeight.bold)), onPressed: _decrementWater), ), ), ], ), ), ], ), ], ), ), ); } } /// begin other files /* FILE #2: about.dart */ import "package:flutter/material.dart"; // separate class allows easy displaying of snackbars class About extends StatelessWidget { @override Widget build(BuildContext context) { return new Scaffold( appBar: new AppBar( title: new Text("About"), ), body: new _AboutWithoutScaffold(), ); } } class _AboutWithoutScaffold extends StatelessWidget { @override Widget build(BuildContext context) { return new Padding( padding: const EdgeInsets.all(8.0), child: new Column( children: [ new Padding( padding: const EdgeInsets.only(top: 32.0), // heading text with app's name child: new Text( "Hydrogen Hydroxide", style: new TextStyle( fontWeight: FontWeight.bold, fontSize: 32.0, ), ), ), new Container( alignment: Alignment.center, padding: const EdgeInsets.fromLTRB(32.0, 16.0, 32.0, 0.0), // description/about app child: new Text("Hydrogen Hydroxide is my first Android app. " "It was created using Flutter, which is pretty productive. " "As for myself, I am a young student who likes to code."), ), // hidden button that triggers an easter egg new FlatButton( child: new Text(""), onPressed: () { Scaffold.of(context).showSnackBar(new SnackBar( content: new Text("You found an easter egg! :P"), )); }, ), ], ), ); } } /* FILE #3: app_settings.dart */ import "package:flutter/material.dart"; import "./main.dart" as Main; // separate class allows easy displaying of snackbars class AppSettings extends StatelessWidget { @override Widget build(BuildContext context) { return new Scaffold( appBar: new AppBar( title: new Text("Settings"), ), body: new _AppSettingsWithoutScaffold(), ); } } class _AppSettingsWithoutScaffold extends StatelessWidget { @override Widget build(BuildContext context) { return new ListView( children: [ new ListTile( // setting to change the daily water goal amount title: new Text("Daily goal amount"), subtitle: new Text("The amount of water you want to drink every day"), onTap: () { // stores new goal value int tempGoal; showDialog( context: context, child: new AlertDialog( title: new Text("Daily goal amount"), content: new TextField( decoration: new InputDecoration(hintText: "Enter a new value"), onChanged: (String value) { try { if (value != null) { tempGoal = int.parse(value) > 0 ? int.parse(value) : Main.DihydrogenMonoxideState.waterGoal; } else { // revert to original value if null tempGoal = Main.DihydrogenMonoxideState.waterGoal; } } catch (e) { // revert to original value if an exception occurs tempGoal = Main.DihydrogenMonoxideState.waterGoal; } }, ), actions: [ new FlatButton( child: new Text("CANCEL"), onPressed: () => Navigator.pop(context)), new FlatButton( padding: const EdgeInsets.only(left: 16.0, right: 16.0), child: new Text("CHANGE"), onPressed: () { // set new water goal Main.DihydrogenMonoxideState.waterGoal = tempGoal ?? Main.DihydrogenMonoxideState.waterGoal; // save the value to the local file Main.DihydrogenMonoxideState.writeDataToFile( [null, Main.DihydrogenMonoxideState.waterGoal]); Navigator.pop(context); }, ), ], ), ); }, onLongPress: () { // store previous water goal and reset water goal int tempGoal = Main.DihydrogenMonoxideState.waterGoal; Main.DihydrogenMonoxideState.waterGoal = 2000; // save the value to the local file Main.DihydrogenMonoxideState.writeDataToFile( [null, Main.DihydrogenMonoxideState.waterGoal]); // show a snackbar informing the user of the reset Scaffold.of(context).showSnackBar(new SnackBar( content: new Text("Successfully reset water goal."), // undo action action: new SnackBarAction( label: "UNDO", onPressed: () { // revert water goal to what it was before Main.DihydrogenMonoxideState.waterGoal = tempGoal; // save the reverted value to the local file Main.DihydrogenMonoxideState.writeDataToFile( [null, Main.DihydrogenMonoxideState.waterGoal]); }, ), )); }, ), ], ); } }

[DT] Hydrogen Hydroxide