diff options
Diffstat (limited to 'client_app_flutter/lib/main.dart')
| -rw-r--r-- | client_app_flutter/lib/main.dart | 22 |
1 files changed, 19 insertions, 3 deletions
diff --git a/client_app_flutter/lib/main.dart b/client_app_flutter/lib/main.dart index 8502127..957b125 100644 --- a/client_app_flutter/lib/main.dart +++ b/client_app_flutter/lib/main.dart @@ -64,7 +64,8 @@ class MyHomePage extends StatefulWidget { } class _MyHomePageState extends State<MyHomePage> { - FirebaseDatabase database = FirebaseDatabase.instance; + // FirebaseDatabase database = FirebaseDatabase.instance; + // DatabaseReference ref = FirebaseDatabase.instance.ref().child('temperature'); // final ref = FirebaseDatabase.instance.ref(); int _counter = 0; @@ -76,7 +77,14 @@ class _MyHomePageState extends State<MyHomePage> { // so that the display can reflect the updated values. If we changed // _counter without calling setState(), then the build method would not be // called again, and so nothing would appear to happen. - _counter++; + // ref.onValue.listen( + // (event) { + // setState(() { + // _counter = event.snapshot.value as int; + // }); + // }, + // ); + // _counter++; // final snapshot = await ref.child('temperature').get(); // final snapshot = database.ref().child('temperature').get(); // if (snapshot.exists) { @@ -93,7 +101,15 @@ class _MyHomePageState extends State<MyHomePage> { Widget build(BuildContext context) { // This method is rerun every time setState is called, for instance as done // by the _incrementCounter method above. - // + + DatabaseReference ref = FirebaseDatabase.instance.ref().child('temperature'); + ref.onValue.listen( + (event) { + setState(() { + _counter = event.snapshot.value as int; + }); + }, + ); // The Flutter framework has been optimized to make rerunning build methods // fast, so that you can just rebuild anything that needs updating rather // than having to individually change instances of widgets. |