Question

在我的任务中，我已执行提醒检查过程。如果提醒时间等于当前时间，则会弹出一个弹出框。在此任务中，弹出框正确显示。

但是，如果我将此任务合并到一个大的进程，这意味着提醒任务将是主程序的子程序。弹出窗口没有进入其他屏幕。如果时间符合当前时间，则当用户使用本程序中的任何屏幕时，必须向用户显示警报。

if (LDbTime <= LSysTime) {
                                    rem_id = c.getString(c.getColumnIndex("reminder_id"));
                                    remName = c.getString(c.getColumnIndex("rname"));
                                    mediaPlayer.start();
                                    handler.post(new Runnable(){
                                    public void run() {
                                        alert.setTitle("Alert :"+remName);
                                        alert.setPositiveButton("OK", new DialogInterface.OnClickListener() {
                                            public void onClick(DialogInterface dialog, int whichButton) {
                                                mediaPlayer.pause();
                                            }
                                        });
                                        alert.show();
                                        db1.execSQL("UPDATE RemainAlarmS SET expired ='TRUE' WHERE reminder_id = " + rem_id );
                                            }
                                        });
                                    Thread.sleep(5000);
                                }

在此警报消息中，需要在提醒唤醒时为前屏幕显示。

请帮我找到解决方案..

先谢谢。

Answer 1

如果您尝试询问当您的活动不是用户手机上的重点活动时如何显示对话框，请尝试使用通知。在不同的应用程序上弹出对话框会在用户执行其他操作时中断用户。来自Android UI准则：

Use the notification system — don't use dialog boxes in place of notifications

If your background service needs to notify a user, use the standard notification system — 
don't use a dialog or toast to notify them. A dialog or toast would immediately 
take focus    and interrupt the user, taking focus away from what they were doing: 
the user could be in the middle of typing text the moment the dialog appears 
and could accidentally act on the dialog. 
Users are used to dealing with notifications and 
can pull down the notification shade at their convenience to respond to your message.

创建通知的指南在此处：http://developer.android.com/guide/topics/ui/notifiers/notifications.html

Answer 2

您可以将以下代码用于待处理意图..

Intent i = new Intent("android.intent.action.DA");
PendingIntent operation = PendingIntent.getActivity(getBaseContext(), 0, i, Intent.FLAG_ACTIVITY_NEW_TASK);
AlarmManager alarmManager = (AlarmManager) getBaseContext().getSystemService(ALARM_SERVICE);
GregorianCalendar calendar = new GregorianCalendar(y,m,d, hr, mi);
long alarm_time = calendar.getTimeInMillis();
alarmManager.set(AlarmManager.RTC_WAKEUP  , alarm_time , operation);

“android.intent.action.DA”表示DisplayNotification.java类的Activity

public class DisplayNotification extends Activity {
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    int notifID = getIntent().getExtras().getInt("NotifID");
    Intent i = new Intent("android.intent.action.AD");
    i.putExtra("NotifID", notifID);  
    PendingIntent detailsIntent =PendingIntent.getActivity(this, 0, i, 0);
    NotificationManager nm = (NotificationManager)getSystemService(NOTIFICATION_SERVICE);
    Notification notif = new Notification(R.drawable.ic_launcher,"Time's up!",System.currentTimeMillis());
    CharSequence from = "AlarmManager - Time's up!";
    CharSequence message = "This is your alert, courtesy of the AlarmManager";        
    notif.setLatestEventInfo(this, from, message, detailsIntent);
    notif.vibrate = new long[] { 100, 250, 100, 500};        
    nm.notify(notifID, notif);
    finish();
}
}

“android.intent.action.AD”表示AlarmDetails.java类

public class AlarmDetails extends Activity {


@Override
protected void onCreate(Bundle savedInstanceState) {
    // TODO Auto-generated method stub
    super.onCreate(savedInstanceState);
    setContentView(R.layout.alarmdetails);

    NotificationManager nm = (NotificationManager) 
            getSystemService(NOTIFICATION_SERVICE);
        //---cancel the notification---
        nm.cancel(getIntent().getExtras().getInt("NotifID")); 
}

}

我希望这会对你有帮助！..

Answer 3

您可以使用状态栏通知。

警报需要在android的前面屏幕上弹出

3 个答案: