johrpan/musicus_mobile
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Use the storage access framework

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Everything related to file system access has been rewritten to make use
of the storage access framework. This means that the
WRITE_EXTERNAL_STORAGE is no longer needed. Because of that, the
dependency on permission_handler could be dropped and all code related
to permission handling has been removed. To be able to open a whole
document tree, the minSdkVersion was bumped to 21. Finally the file
selector was rewritten using custom platform dependent code.
This commit is contained in:
Elias Projahn 2020-04-11 21:59:23 +02:00
parent febcf29cf1
commit e9f0bd03e7
9 changed files with 204 additions and 281 deletions
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54
lib/backend.dart
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@ -1,5 +1,5 @@
import 'package:flutter/services.dart';
import 'package:flutter/widgets.dart';
import 'package:permission_handler/permission_handler.dart';
import 'package:rxdart/rxdart.dart';
import 'package:shared_preferences/shared_preferences.dart';
@ -7,7 +7,6 @@ import 'database.dart';
enum BackendStatus {
loading,
needsPermissions,
setup,
ready,
}
@ -27,15 +26,15 @@ class Backend extends StatefulWidget {
}
class BackendState extends State<Backend> {
final _permissionHandler = PermissionHandler();
static const _platform = MethodChannel('de.johrpan.musicus/platform');
final playerActive = BehaviorSubject.seeded(false);
final playing = BehaviorSubject.seeded(false);
final position = BehaviorSubject.seeded(0.0);
Database db;
BackendStatus status = BackendStatus.loading;
String musicLibraryPath;
Database db;
String musicLibraryUri;
SharedPreferences _shPref;
@ -54,25 +53,15 @@ class BackendState extends State<Backend> {
}
Future<void> _load() async {
_shPref = await SharedPreferences.getInstance();
musicLibraryPath = _shPref.getString('musicLibraryPath');
db = Database('musicus.sqlite');
final permissionStatus =
await _permissionHandler.checkPermissionStatus(PermissionGroup.storage);
if (permissionStatus != PermissionStatus.granted) {
setState(() {
status = BackendStatus.needsPermissions;
});
} else {
await _loadMusicLibrary();
}
_shPref = await SharedPreferences.getInstance();
musicLibraryUri = _shPref.getString('musicLibraryUri');
_loadMusicLibrary();
}
Future<void> _loadMusicLibrary() async {
if (musicLibraryPath == null) {
if (musicLibraryUri == null) {
setState(() {
status = BackendStatus.setup;
});
@ -83,26 +72,19 @@ class BackendState extends State<Backend> {
}
}
Future<void> requestPermissions() async {
final result =
await _permissionHandler.requestPermissions([PermissionGroup.storage]);
Future<void> chooseMusicLibraryUri() async {
final uri = await _platform.invokeMethod<String>('openTree');
if (result[PermissionGroup.storage] == PermissionStatus.granted) {
_loadMusicLibrary();
if (uri != null) {
musicLibraryUri = uri;
await _shPref.setString('musicLibraryUri', uri);
setState(() {
status = BackendStatus.loading;
});
await _loadMusicLibrary();
}
}
Future<void> openAppSettings() => _permissionHandler.openAppSettings();
Future<void> setMusicLibraryPath(String path) async {
musicLibraryPath = path;
await _shPref.setString('musicLibraryPath', path);
setState(() {
status = BackendStatus.loading;
});
await _loadMusicLibrary();
}
void startPlayer() {
playerActive.add(true);
}