Failed to open Database in android app

Question

in my app i am trying to fetch some data from database and i am showing it in a list. When i run the app in my Motorola(2.1) and in Samsung Ace(2.3) and i some of my emulators t

Answer 1

public class BaseDAO extends OrmLiteSqliteOpenHelper {

public static Dao instanseDao(Context cont, Class c,String Dbname) {
   File path=new File(DATABASE_PATH);
   File f = new File(DATABASE_PATH+DB_NAME);//改默认数据库目录需先手动创建数据库文件
if (!path.exists()) {
      path.mkdirs();// 创建一个目录
}
if (!f.exists()) {
      try {
          f.createNewFile();//创建文件
      } catch (IOException e) {
          e.printStackTrace();
      }
    }




//how do??????

    SQLiteDatabase db = SQLiteDatabase.openOrCreateDatabase(f,null);//创建数据库实例
    BaseDAO baseDAO = new BaseDAO(cont);
    //baseDAO.onCreate(db); 
    //baseDAO.onUpgrade(db,baseDAO.getConnectionSource(), OLD_DB_VERSION, DB_VERSION);
    //baseDAO.close();//注意要先关掉
    //db =SQLiteDatabase.openDatabase(DATABASE_PATH+DB_NAME, null, SQLiteDatabase.CREATE_IF_NECESSARY);

    try {
        Dao = baseDAO.getDao(c);
    } catch (SQLException e) {
        e.printStackTrace();
    }

    CONT=cont;
    C=c;
    DB_NAME = Dbname;
    return Dao;
}