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yifeng.yl
2019-01-10 19:43:22 +08:00
parent 957a9185a7 ece7b739f3
commit c45a8c3862
14 changed files with 249 additions and 135 deletions
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21
lib/common/provider.dart
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@ -14,18 +14,21 @@ class Provider {
//Get a location using getDatabasesPath
String databasesPath = await getDatabasesPath();
String path = join(databasesPath, 'flutter.db');
List<Map> list;
// try {
// db = await openDatabase(path, readOnly: true);
List<Map> tables;
try {
db = await openDatabase(path);
tables = await db
.rawQuery('SELECT name FROM sqlite_master WHERE type = "table"');
print('${tables.length} 7891');
} catch (e) {
print("Error $e");
}
// } catch (e) {
// print("Error $e");
// }
if (db == null) {
if (tables.length < 3) {
// Delete the database
await deleteDatabase(path);
// 关闭上面打开的db，否则无法执行open
db.close();
ByteData data = await rootBundle.load(join("assets", "app.db"));
List<int> bytes =
data.buffer.asUint8List(data.offsetInBytes, data.lengthInBytes);