我需要调用数据库的步骤是什么

Question

i am new in developing android application. Now, i have a database file which is "database.accdb" in assets folder. what should i do inside the java code in order to access the database

Answer 1

UPDATE I just realized that you're writing an Android application. ODBC or Microsoft Access database will NOT work in Android. SQLite is used in Android, you have to subclass SQLiteOpenHelper , and override onCreate() , and onUpgrade() . Below is the direction of how to access Microsoft Access database on a regular Java program.

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Looks like you're trying to access a Microsoft Access database. In this case, you need to instantiate the JDBC-ODBC driver by

try {
    Class.forName("sun.jdbc.odbc.JdbcOdbcDriver").newInstance();
    String connectionUri = "jdbc:odbc:" + /*PATH TO YOUR FILENAME*/;
    connection = DriverManager.getConnection(connectionUri, username, password);
} catch (ClassNotFoundException e) {
    e.printStackTrace();
}

Then you can use your connection like you use any other JDBC database connection. For example, you can do:

Connection connection = .... /* Get my connection */;
try {
    PreparedStatement ps = connection.prepareStatement(
            "SELECT id, password FROM users WHERE email LIKE ?");
    ps.setString(1, email);
    ResultSet result = ps.executeQuery();
    while (result.next()) {
        /* do whatever you want with the result */
    }
} catch (SQLException ex) {
    ex.printStackTrace();
} finally {
    /* Close the connection */
}