Question

我正在努力完成一项任务。这是正在发生的事情。我首先在第一个活动的字符串中保存共享首选项中的值，并将该值传递给下面的此活动。然后在我的第二个活动中，我称之为该值。然后我把android的当前时间转换为字符串。

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@Lazy Ninja： 更新请检查： 好的。我得到的时间最终匹配！现在只是最后一件事，我如何继续运行这个＆＃34; if statement＆＃34;在后台，所以即使应用程序关闭，系统会继续检查这两个值吗？

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更新代码：

                Intent in = new Intent(Alarm.this, FajrAlarmRecieverActivity.class);
                PendingIntent pi = PendingIntent.getActivity(Alarm.this, 2, in, PendingIntent.FLAG_CANCEL_CURRENT);

                /*My Time from Shared Preference*/
                //SharedPreferences prfs = getSharedPreferences("customeAlarmTimes", Context.MODE_PRIVATE);
                //myTime = prfs.getString("Isha", "Isha");

                String myTime = "11:15";

                SimpleDateFormat formatter = new SimpleDateFormat("K:mm"); 
                Date date = formatter.parse(myTime); // You will need try/catch around this
                long millis = date.getTime();
                /*My Time from Shared Preference*/

                /*System Time*/
                Date today = Calendar.getInstance().getTime();
                String reportDate = new SimpleDateFormat("K:mm").format(today);
                Date swag = formatter.parse(reportDate);
                long currentTime= swag.getTime();

                Log.d("SystemTime", reportDate);
                Log.d("MyTime", myTime);
                Log.d("SystemTime in Millis", currentTime+"");
                Log.d("MyTime in Millis", millis+"");

                if(millis == currentTime){
                    SendNotification();
                    AlarmManager am = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
                    am.set(AlarmManager.RTC_WAKEUP, AlarmManager.INTERVAL_DAY, pi);
                }
                else if (millis > currentTime){
                    Toast mtoast = Toast.makeText(getApplicationContext(), "FAJR TIME > CURRENT TIME", Toast.LENGTH_LONG);
                    mtoast.show();
                }
                else if (millis < currentTime){
                    Toast mtoast = Toast.makeText(getApplicationContext(), "FAJR TIME < CURRENT TIME", Toast.LENGTH_LONG);
                    mtoast.show();
                }
    }
}

Answer 1

使用重复闹钟。它将为您处理条件请尝试以下

Intent i = new Intent(getApplicationContext(), FajrAlarmRecieverActivity.class); 
PendingIntent sender = PendingIntent.getActivity(Alarm.this, 0, i, 0);

// Get Time from your sharedpreferences
Calendar calendar = Calendar.getInstance();
calendar.set(Calendar.HOUR_OF_DAY, hour); // set　Fajr hour
calendar.set(Calendar.MINUTE, minute); // set Fajr minute
calendar.set(Calendar.SECOND, 0); // set seconds  ( well no need for seconds)    
AlarmManager am = (AlarmManager)getSystemService(ALARM_SERVICE); 
am.set(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(), sender);

别忘了在清单文件中添加FajrAlarmRecieverActivity 阅读完评论后，请使用set 警报触发后，从sharedPreferences中读取并再次设置警报。
编辑获取当前时间

long currentTime= System.currentTimeMillis();

从您的sharedPrefs获取时间，并将其转换为毫秒

if( sharedTimeInMillis < currentTime ){
   // your good stuff
}

将您的字符串时间转换为毫秒

myTime = prfs.getString("Isha", "Isha");
SimpleDateFormat formatter = new SimpleDateFormat("K:mm"); 
Date date = formatter.parse(myTime ); // You will need try/catch around this
long millis = date.getTime();

当myTime与android系统时间匹配时如何触发活动？

1 个答案: