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yifeng.yl
2019-01-08 20:39:13 +08:00
parent 383819e280
commit 2e9702ec7b
242 changed files with 13523 additions and 654 deletions
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25
lib/common/provider.dart
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@ -12,20 +12,25 @@ class Provider {
// isCreate 用永远 copy 一个新的数据库
Future init(bool isCreate) async {
String databasesPath = await getDatabasesPath();
String path = join(databasesPath,'flutter.db');
// print("path ${path}");
if(db == null && isCreate){
String path = join(databasesPath, 'flutter.db');
try {
db = await openDatabase(path);
} catch (e) {
print("Error $e");
}
if (db == null && isCreate) {
ByteData data = await rootBundle.load(join("assets", "app.db"));
List<int> bytes = data.buffer.asUint8List(data.offsetInBytes, data.lengthInBytes);
List<int> bytes =
data.buffer.asUint8List(data.offsetInBytes, data.lengthInBytes);
await new File(path).writeAsBytes(bytes);
db = await openDatabase(path,version: 2,onCreate : (Database db, int version) async{
// print('db created version is $version');
},onOpen : (Database db) async{
// print('new db opened');
db = await openDatabase(path, version: 2,
onCreate: (Database db, int version) async {
print('db created version is $version');
}, onOpen: (Database db) async {
print('new db opened');
});
}else{
} else {
// print('Opening existing database');
}
}