Question

您好我已经创建了一个任务提醒应用程序。但是我无法通过任务名称通知用户该任务。这应该是一件相当简单的事情，但我无法做到。

我想要它做的是：我保存一个名为“任务3”的任务，并提醒我下午6点。当下午6点到来时，我收到一条通知警告“任务3”。目前，它只是说“需要审查任务”是否有办法检索任务标题并将其作为通知而不是字符串显示？

这是提醒服务类类：

public ReminderService（）{ 超级（ “ReminderService”）; }

@Override
void doReminderWork(Intent intent) {
    Log.d("ReminderService", "Doing work.");
    Long rowId = intent.getExtras().getLong(RemindersDbAdapter.KEY_ROWID);

    NotificationManager mgr = (NotificationManager)getSystemService(NOTIFICATION_SERVICE);

    Intent notificationIntent = new Intent(this, ReminderEditActivity.class);                 
    notificationIntent.putExtra(RemindersDbAdapter.KEY_ROWID, rowId); 

    PendingIntent pi = PendingIntent.getActivity(this, 0, notificationIntent, PendingIntent.FLAG_ONE_SHOT);

//这是我需要改变的方式。

    Notification notification=new Notification(android.R.drawable.stat_sys_warning, getString(R.string.notify_new_task_message), System.currentTimeMillis());
    notification.setLatestEventInfo(this, getString(R.string.notify_new_task_title), getString(R.string.notify_new_task_message), pi);

这是提醒适配器类

* @param reminderDateTime the date and time the reminder should remind the user
 * @return rowId or -1 if failed
 */
public long createReminder(String title, String body, String reminderDateTime) {
    ContentValues initialValues = new ContentValues();
    initialValues.put(KEY_TITLE, title);
    initialValues.put(KEY_BODY, body);
    initialValues.put(KEY_DATE_TIME, reminderDateTime); 

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

/**
 * Delete the reminder with the given rowId
 * 
 * @param rowId id of reminder to delete
 * @return true if deleted, false otherwise
 */
public boolean deleteReminder(long rowId) {

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

/**
 * Return a Cursor over the list of all reminders in the database
 * 
 * @return Cursor over all reminders
 */
public Cursor fetchAllReminders() {

    return mDb.query(DATABASE_TABLE, new String[] {KEY_ROWID, KEY_TITLE,
            KEY_BODY, KEY_DATE_TIME}, null, null, null, null, null);
}

/**
 * Return a Cursor positioned at the reminder that matches the given rowId
 * 
 * @param rowId id of reminder to retrieve
 * @return Cursor positioned to matching reminder, if found
 * @throws SQLException if reminder could not be found/retrieved
 */
public Cursor fetchReminder(long rowId) throws SQLException {

    Cursor mCursor =

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

}

/**
 * Update the reminder using the details provided. The reminder to be updated is
 * specified using the rowId, and it is altered to use the title, body and reminder date time
 * values passed in
 * 
 * @param rowId id of reminder to update
 * @param title value to set reminder title to
 * @param body value to set reminder body to
 * @param reminderDateTime value to set the reminder time. 
 * @return true if the reminder was successfully updated, false otherwise
 */
public boolean updateReminder(long rowId, String title, String body, String reminderDateTime) {
    ContentValues args = new ContentValues();
    args.put(KEY_TITLE, title);
    args.put(KEY_BODY, body);
    args.put(KEY_DATE_TIME, reminderDateTime);

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

}

Answer 1

如果我理解正确，问题是你显示在string.xml中定义的常量字符串。您应该使用从Intent获取的行ID来从您的数据库中获取相应的提醒并显示其标题。

在提供行ID时，从fetchReminder方法中检索光标，您可以使用以下命令获取提醒的标题：

String reminderTitle = cursor.getString(cursor.getColumnIndex(RemindersDbAdapter.KEY_TITLE));

事先验证光标是否为空。

Android应用帮助

1 个答案: