How To Export and import to sdcard reminder db using below code?

Help- how to export and import db on sdcard using this code?,Iam new to Android so i didntknow how to export and import using Reminderdatahelper class, Thanks InAdvance.

import android.content.Context;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;

public class ReminderDataHelper extends SQLiteOpenHelper {

    private static final String DATABASE_NAME = "reminderData.db";
    private static final int DATABASE_VERSION = 1;
    private static final String DB_TABLE_NAME = "reminders";
    private static final String DB_COLUMN_ID = "_id";
    private static final String DB_COLUMN_TYPE = "type";
    private static final String DB_COLUMN_TITLE = "title";
    private static final String DB_COLUMN_CONTENT = "content";
    private static final String DB_COLUMN_TIME = "time";
    private static final String DB_COLUMN_FREQUENCY = "frequency";

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

    @Override
    public void onCreate(SQLiteDatabase db) {
        db.execSQL("CREATE TABLE " + DB_TABLE_NAME + "(" +
        DB_COLUMN_ID + " INTEGER PRIMARY KEY, " +
        DB_COLUMN_TYPE + " TEXT, " +
        DB_COLUMN_TITLE + " TEXT, " +
        DB_COLUMN_CONTENT + " TEXT, " +
        DB_COLUMN_FREQUENCY + " TEXT, " +
        DB_COLUMN_TIME + " LONG)"
        );
    }

    @Override
    public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
        db.execSQL("DROP TABLE IF EXISTS " + DB_TABLE_NAME);
        onCreate(db);
    }

}