SQLiteAssetHelper 中缺少数据库错误

Question

I have a database in assets/databases and also have a class to read data from my database but when open database i got Missing databases error

Note: i have myDb.zip in assets/databases

this is my Class to open database:

public class DB_helper extends SQLiteAssetHelper {
    private static final String DATABASE_NAME = "myDb.db";
    private static final int DATABASE_VERSION = 1;

    public DB_helper(Context context) {
        super(context, DATABASE_NAME, null, DATABASE_VERSION);

    }

}

and in this line i call it:

 SQLiteDatabase mydb = new DB_helper(appContext).getWritableDatabase();

i got this error:

E/AndroidRuntime: FATAL EXCEPTION: main
    Process: ir.dpsoft.saman, PID: 10620
    com.readystatesoftware.sqliteasset.SQLiteAssetHelper$SQLiteAssetException: Missing databases/myDb.db file (or .zip, .gz archive) in assets, or target folder not writable

Answer 1

SQLiteAssetHelper just appends .zip or .gz suffixes to the base name, not replacing anything in the file path.

You can fix this either in the asset name or in code. To fix the asset, ship your database as myDb.db.zip , not myDb.zip . Or to fix the code, pass the database name as myDb and not myDb.db .