Android：时间戳

有谁能帮助我如何在数据库的列表视图中放置时间戳和消息详细信息吗？就像在手机上一样，会显示联系人的姓名、时间和他的部分信息。以下是我的数据库的代码：

public class MessagesDBAdapter {

    public static final String KEY_RECIPIENT = "recipient";
    public static final String KEY_MESSAGE = "message";
    public static final String KEY_ROWID = "_id";

    private static final String TAG = "MessagesDBAdapter";
    private DatabaseHelper mDbHelper;
    private SQLiteDatabase mDb;


     //Database creation sql statement

    private static final String DATABASE_CREATE =
        "create table notes (_id integer primary key autoincrement, "
        + "title text not null, body text not null);";

    private static final String DATABASE_NAME = "data";
    private static final String DATABASE_TABLE = "notes";
    private static final int DATABASE_VERSION = 2;

    private final Context mCtx;

    private static class DatabaseHelper extends SQLiteOpenHelper {

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

        @Override
        public void onCreate(SQLiteDatabase db) {
            db.execSQL(DATABASE_CREATE);
        }

        @Override
        public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
            Log.w(TAG, "Upgrading database from version " + oldVersion + " to "
                    + newVersion + ", which will destroy all old data");
            db.execSQL("DROP TABLE IF EXISTS notes");
            onCreate(db);
        }
    }

    /**
     * Constructor - takes the context to allow the database to be
     * opened/created
     * 
     * @param ctx the Context within which to work
     */
    public MessagesDBAdapter(Context ctx) {
        this.mCtx = ctx;
    }

    public MessagesDBAdapter open() throws SQLException {
        mDbHelper = new DatabaseHelper(mCtx);
        mDb = mDbHelper.getWritableDatabase();
        return this;
    }

    public void close() {
        mDbHelper.close();
    }

    public long createNote(String phoneNo, String message) {
        ContentValues initialValues = new ContentValues();
        initialValues.put(KEY_RECIPIENT, phoneNo);
        initialValues.put(KEY_MESSAGE, message);

        open();

        return mDb.insert(DATABASE_TABLE, null, initialValues);
    }

    public boolean deleteNote(long rowId) {

        return mDb.delete(DATABASE_TABLE, KEY_ROWID + "=" + rowId, null) > 0;
    }

    public Cursor fetchAllNotes() {

        return mDb.query(DATABASE_TABLE, new String[] {KEY_ROWID, KEY_RECIPIENT,
                KEY_MESSAGE}, null, null, null, null, null);
    }

    public Cursor fetchNote(long rowId) throws SQLException {

        Cursor mCursor =

            mDb.query(true, DATABASE_TABLE, new String[] {KEY_ROWID,
                    KEY_RECIPIENT, KEY_MESSAGE}, KEY_ROWID + "=" + rowId, null,
                    null, null, null, null);
        if (mCursor != null) {
            mCursor.moveToFirst();
        }
        return mCursor;

    }

    public boolean updateNote(long rowId, String phoneNo, String message) {
        ContentValues args = new ContentValues();
        args.put(KEY_RECIPIENT, phoneNo);
        args.put(KEY_MESSAGE, message);

        return mDb.update(DATABASE_TABLE, args, KEY_ROWID + "=" + rowId, null) > 0;
    }
}

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通过调用System.currentTimeMillis（）获取时间戳

如果您想以可读的格式显示，请尝试SimpleDataFormat