Android应用程序帮助 [英] Android Application Help

问题描述

您好我已经创建了一个任务提醒应用程序。但我无法得到它的通知与任务名称任务的用户。这应该是一个相当简单的事情，但我无法做到这一点。

Hi I have created a task reminder application. However I am unable to get it to notify the user of the task with the task name. It should be a fairly simple thing to do, but I am unable to do it.

我希望它做的是：我救了一个名为任务3，并提醒我下午6点的任务。下午6点时谈到，我得到通知警告说：任务3。目前，它只是说任务​​需要进行审查有没有检索任务标题和presenting它作为一个通知，而不是一个字符串的方法是什么？

What I want it to do is: I save a task called "Task 3" and to remind me for 6pm. When 6pm comes, I get a notification alert saying "Task 3". At the moment, it only says "task needs to be reviewed" Is there a way of retrieving the task title and presenting it as a notification instead of a string?

这是提醒服务类类：

公共ReminderService（）{
        超级（ReminderService）;
            }

public ReminderService() { super("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); 

//这是我需要的方式来改变一下。

//This is the bit I need to change by the way.

    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);

和这是remindersadapter类

and this is the remindersadapter class

* @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;
}

}

推荐答案

如果我理解正确，问题是，您显示string.xml定义的常量字符串。您应该使用行ID你从意图向您数据库中获取相应的提醒，并显示其标题。

If I understand correctly, the problem is that you display a constant string defined in your string.xml. You should use the row id you get from the Intent to fetch the corresponding reminder from you database and display its title.

当你获得从fetchReminder方法光标同时提供行ID，您可以使用让您的提醒标题：

Once you retrieve the cursor from your fetchReminder method while providing the row id, you can get the title of your reminder using:

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

确认您的光标不是null事先。

Verify that your cursor is not null beforehand.

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