我已经使用 SQLiteAssetHelper 类/库从 assets/databases 文件夹中操作数据库,如该链接中所示。我完全按照所有说明进行操作,但我仍然无法访问数据库。
09-27 19:35:46.417: I/Database(27474): sqlite returned: error code = 14, msg = cannot open file at source line 25467
09-27 19:35:46.417: E/Database(27474): sqlite3_open_v2("/data/data/com.gatec.douaa/databases/data", &handle, 2, NULL) failed
09-27 19:35:46.428: W/SQLiteAssetHelper(27474): could not open database data - unable to open database file
09-27 19:35:46.428: W/SQLiteAssetHelper(27474): copying database from assets...
09-27 19:35:46.447: W/SQLiteAssetHelper(27474): extracting file: 'database.db'...
09-27 19:35:46.477: E/SQLiteAssetHelper(27474): Couldn't open data for writing (will try read-only):
09-27 19:35:46.477: E/SQLiteAssetHelper(27474): com.readystatesoftware.sqliteasset.SQLiteAssetException: Missing databases/data.zip file in assets or target folder not writable
代码:
public class MyDatabase extends SQLiteAssetHelper {
private static final String DATABASE_NAME = "data";
private static final int DATABASE_VERSION = 1;
public MyDatabase(Context context) {
super(context, DATABASE_NAME, null, DATABASE_VERSION);
}
请问有什么帮助吗?不知道问题的根源。