complete functionality

lib/helpers/sound_data.dart

@@ -1,7 +1,7 @@
 import 'package:flutter/material.dart';
 
 class SoundData {
-  final String url;
+  String url;
   final String name;
 
   SoundData({

lib/routes/home_page.dart

@@ -4,7 +4,8 @@ import 'package:flutter/material.dart';
 import 'package:flutter_staggered_grid_view/flutter_staggered_grid_view.dart';
 import 'package:audioplayers/audioplayers.dart';
 import 'package:cloud_firestore/cloud_firestore.dart';
-import 'package:flutter_cache_manager/flutter_cache_manager.dart';
+import 'package:http/http.dart' as http;
+import 'package:path_provider/path_provider.dart';
 
 import '../helpers/sound_data.dart';
 import '../ui_elements/button.dart';
@@ -26,23 +27,57 @@ class _HomePageState extends State<HomePage> {
     _getSounds();
   }
 
+  @override
+  void dispose() {
+    super.dispose();
+    _player.dispose();
+  }
+
   void _getSounds() async {
     try {
       final ref = _db.collection("soundboard-data");
       final QuerySnapshot snap = await ref.getDocuments();
-      for (DocumentSnapshot doc in snap.documents) {
-        File file = await DefaultCacheManager().getSingleFile(
-          doc.data["url"],
-        );
 
-        _data.add(
-          SoundData(
-            name: doc.data["name"],
-            url: file.path,
-          ),
-        );
+      setState(() {
+        for (DocumentSnapshot doc in snap.documents) {
+          _data.add(
+            SoundData(
+              name: doc.data["name"],
+              url: doc.data["url"],
+            ),
+          );
+        }
+      });
+
+      final Directory dir = await getApplicationDocumentsDirectory();
+      for (SoundData soundData in _data) {
+        final File file = File('${dir.path}/${soundData.name}.mp3');
+        if (!await file.exists()) {
+          http.Response response = await http.get(soundData.url);
+          await file.writeAsBytes(response.bodyBytes, flush: true);
+        }
+        soundData.url = file.path;
       }
-      setState(() {});
+
+      bool dataContains(String name) {
+        bool result = false;
+        _data.forEach((SoundData soundData) {
+          if ("${soundData.name}.mp3" == name) {
+            result = true;
+          }
+        });
+        return result;
+      }
+
+      dir
+          .list(recursive: true, followLinks: false)
+          .listen((FileSystemEntity entity) async {
+        if (!entity.path.endsWith(".mp3")) return;
+        final name = entity.path.split("/").last;
+        if (dataContains(name)) return;
+
+        await entity.delete();
+      });
     } catch (e) {
       print(e);
     }

lib/ui_elements/button.dart

@@ -1,4 +1,7 @@
+import 'dart:async';
+
 import 'package:flutter/material.dart';
+import 'package:flutter/services.dart';
 import 'package:audioplayers/audioplayers.dart';
 
 import '../helpers/sound_data.dart';
@@ -20,32 +23,38 @@ class _ButtonState extends State<Button> {
   bool _tapped = false;
   bool _justTapped = false;
   Duration _currentDuration = Duration();
+  Timer _timer;
 
   @override
   void initState() {
     super.initState();
-    widget.audio.onDurationChanged.listen((Duration time) {
+    widget.audio.onDurationChanged.listen((Duration time) async {
       if (_currentDuration != time) {
         _currentDuration = time;
-        if (!_justTapped) setState(() => _tapped = false);
-      }
-    });
-    widget.audio.onAudioPositionChanged.listen((Duration time) async {
-      try {
-        if (await widget.audio.getDuration() <= time.inMilliseconds + 500) {
-          await Future.delayed(Duration(milliseconds: 500));
+        if (_justTapped) {
+          if (_timer != null) _timer.cancel();
+          _timer = Timer(_currentDuration, () {
+            setState(() => _tapped = false);
+          });
+        } else {
           setState(() => _tapped = false);
         }
-      } on Exception catch (e) {
-        print(e);
       }
     });
   }
 
+  @override
+  void dispose() {
+    super.dispose();
+    if (_timer != null) _timer.cancel();
+  }
+
   @override
   Widget build(BuildContext context) {
     return GestureDetector(
       onTap: () async {
+        _currentDuration = null;
+
         await widget.audio.stop();
         await widget.audio.play(widget.soundData.url);
 

pubspec.lock

@@ -118,13 +118,6 @@ packages:
     description: flutter
     source: sdk
     version: "0.0.0"
-  flutter_cache_manager:
-    dependency: "direct main"
-    description:
-      name: flutter_cache_manager
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "1.1.3"
   flutter_staggered_grid_view:
     dependency: "direct main"
     description:
@@ -143,7 +136,7 @@ packages:
     source: sdk
     version: "0.0.0"
   http:
-    dependency: transitive
+    dependency: "direct main"
     description:
       name: http
       url: "https://pub.dartlang.org"
@@ -192,7 +185,7 @@ packages:
     source: hosted
     version: "1.6.4"
   path_provider:
-    dependency: transitive
+    dependency: "direct main"
     description:
       name: path_provider
       url: "https://pub.dartlang.org"
@@ -238,13 +231,6 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "1.5.5"
-  sqflite:
-    dependency: transitive
-    description:
-      name: sqflite
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "1.2.0"
   stack_trace:
     dependency: transitive
     description:
@@ -266,13 +252,6 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "1.0.5"
-  synchronized:
-    dependency: transitive
-    description:
-      name: synchronized
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "2.1.1"
   term_glyph:
     dependency: transitive
     description:

pubspec.yaml

@@ -27,7 +27,8 @@ dependencies:
   flutter_staggered_grid_view: ^0.3.0
   audioplayers: ^0.13.7
 
-  flutter_cache_manager: ^1.1.3 
+  path_provider: ^1.5.1
+  http: ^0.12.0+4
 
   firebase_messaging: ^6.0.9
   cloud_firestore: ^0.13.0+1