AlarmManager.setExact（）在错误的时间开始？

编程入门行业动态更新时间:2024-10-22 11:29:15

本文介绍了AlarmManager.setExact（）在错误的时间开始？的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！问题描述

我安排的PendingIntent，以在5秒内被发送，但23秒开始。 API = 19（AlarmManager.setExact（...））：

16 10-23：43：44.638 11903-11903 /？ D / MainActivity：周五10月23日十六时43分44秒GMT + 05：00 2015年：计划在5000毫秒10-23 16：44：07.728 11903-11903 /？ D / MainActivity：周五10月23日16时44分07秒GMT + 05：00 2015：解雇私人的PendingIntent的PendingIntent; 私人诠释SCHEDULE_REQUEST_ code = 1; 私有静态最后弦乐SCHEDULER_ACTION =android.intent.action.FOTA_SCHEDULE_CHECK; 私人无效日志（字符串消息）{ StringBuilder的SB =新的StringBuilder（）; （。新的日期（）的toString（））sb.append; sb.append（：）; sb.append（消息）; sb.append（\\ n）; Log.d（的getClass（）getSimpleName（），sb.toString（））; tv.append（sb.toString（））; tv.append（\\ n）; } 私人广播接收器schedulerReceiver =新的广播接收器（）{ @覆盖公共无效的onReceive（上下文的背景下，意图意图）{ 日志（炒鱿鱼）; } }; 私人无效时间表（）{ registerReceiver（schedulerReceiver，新的IntentFilter（SCHEDULER_ACTION））; 意图scheduleIntent =新意图（SCHEDULER_ACTION）; 的PendingIntent = PendingIntent.getBroadcast（这一点，SCHEDULE_REQUEST_ code，scheduleIntent，0）; AlarmManager alarmManager =（AlarmManager）this.getSystemService（Context.ALARM_SERVICE）; //第一次调用（一次，确切） INT延迟= 5 * 1000; // 5S 日志（预定+延迟+毫秒）; alarmManager.setExact（AlarmManager.RTC，System.currentTimeMillis的（）+延迟的PendingIntent）; } @覆盖保护无效的onDestroy（）{ super.onDestroy（）; 取消调度（）; } 私人无效取消调度（）{ AlarmManager alarmManager =（AlarmManager）getSystemService（Context.ALARM_SERVICE）; alarmManager.cancel（的PendingIntent）; 的PendingIntent = NULL; unregisterReceiver（schedulerReceiver）; }

解决方案

我心中已经得到了同样的问题，但的PendingIntent 5秒后开始，而不是2，因为我尝试设置。

alarmManager.setExact（AlarmManager.RTC_WAKEUP，System.currentTimeMillis的（）+ 2 * 1000，pIntent）;

如果我设置在5秒多， alarmManager 开始完全吻合。我不知道是什么inexatly时间我会在生产环境中得到的，所以我选1纪录如短的时间间隔。

所以，用我的应用程序 postDelayed（）而不是 AlarmManager 在很短的时间间隔，而 AlarmManager 长。

code样品：

如果（延迟== 0）{ 意向意图=新意图（背景下，SoundService.class）; intent.putExtra（SoundService.SOUND，声音）; context.startService（意向）;}否则如果（延迟＆LT; = 60）{ （新的处理程序（））。postDelayed（新的Runnable（）{ @覆盖公共无效的run（）{ 意向意图=新意图（背景下，SoundService.class）; intent.putExtra（SoundService.SOUND，声音）; context.startService（意向）; } }，延迟* 1000）;}否则如果（延迟→60）{ 最终诠释SDK_INT = Build.VERSION.SDK_INT; 意向意图=新意图（背景下，AlarmBroadcastReceiver.class）; intent.setAction（action_play：+声音）; intent.putExtra（SoundService.SOUND，声音）; 的PendingIntent pIntent = PendingIntent.getBroadcast（上下文，0，意图，0）; AlarmManager alarmManager =（AlarmManager）context.getSystemService（Context.ALARM_SERVICE）; 长运行时间= System.currentTimeMillis的（）+延迟* 1000; 如果（SDK_INT＆LT; Build.VERSION_ codeS.KITKAT）{ alarmManager.set（AlarmManager.RTC_WAKEUP，运行时pIntent）; }否则如果（（SDK_INT＆GT; = Build.VERSION_ codeS.KITKAT）及及（SDK_INT＆LT; Build.VERSION_ codeS.M））{ alarmManager.setExact（AlarmManager.RTC_WAKEUP，运行时pIntent）; }否则如果（SDK_INT＆GT; = Build.VERSION_ codeS.M）{ alarmManager.setExactAndAllowWhileIdle（AlarmManager.RTC_WAKEUP，运行时pIntent）; }}

其中， SoundService - 服务与完善的功能发挥，延迟 - 播放前的延迟，以秒为单位， AlarmBroadcastReceiver -

公共类AlarmBroadcastReceiver扩展广播接收器{最后弦乐LOG_TAG = this.getClass（）的getName（）。@覆盖公共无效的onReceive（上下文CTX，意图意图）{ 如果（intent.getAction（）startsWith（action_play：））{ 意图playIntent =新意图（CTX，SoundService.class）; playIntent.putExtra（SoundService.SOUND，intent.getStringExtra（SoundService.SOUND））; ctx.startService（playIntent）; }}

}

I schedule pendingIntent to be sent in 5 seconds, but it starts in 23 seconds. API=19 (AlarmManager.setExact(...)):

10-23 16:43:44.638 11903-11903/? D/MainActivity﹕ Fri Oct 23 16:43:44 GMT+05:00 2015: scheduled in 5000 ms 10-23 16:44:07.728 11903-11903/? D/MainActivity﹕ Fri Oct 23 16:44:07 GMT+05:00 2015: fired private PendingIntent pendingIntent; private int SCHEDULE_REQUEST_CODE = 1; private static final String SCHEDULER_ACTION = "android.intent.action.FOTA_SCHEDULE_CHECK"; private void log(String message) { StringBuilder sb = new StringBuilder(); sb.append(new Date().toString()); sb.append(": "); sb.append(message); sb.append("\n"); Log.d(getClass().getSimpleName(), sb.toString()); tv.append(sb.toString()); tv.append("\n"); } private BroadcastReceiver schedulerReceiver = new BroadcastReceiver() { @Override public void onReceive(Context context, Intent intent) { log("fired"); } }; private void schedule() { registerReceiver(schedulerReceiver, new IntentFilter(SCHEDULER_ACTION)); Intent scheduleIntent = new Intent(SCHEDULER_ACTION); pendingIntent = PendingIntent.getBroadcast(this, SCHEDULE_REQUEST_CODE, scheduleIntent, 0); AlarmManager alarmManager = (AlarmManager) this.getSystemService(Context.ALARM_SERVICE); // first invocation (once, exact) int delay = 5 * 1000; // 5s log("scheduled in " + delay + " ms"); alarmManager.setExact(AlarmManager.RTC, System.currentTimeMillis() + delay, pendingIntent); } @Override protected void onDestroy() { super.onDestroy(); unschedule(); } private void unschedule() { AlarmManager alarmManager = (AlarmManager) getSystemService(Context.ALARM_SERVICE); alarmManager.cancel(pendingIntent); pendingIntent = null; unregisterReceiver(schedulerReceiver); }

解决方案

I'v got the same problem, but pendingIntent start after 5 seconds, not 2 as i try to set.

alarmManager.setExact(AlarmManager.RTC_WAKEUP, System.currentTimeMillis() + 2 * 1000, pIntent);

If i set 5 seconds and more, alarmManager starts exactly. I don't know what inexatly interval i'll get in production environment, so i choose 1 minute as short time interval.

So, my app used postDelayed() instead of AlarmManager for the short time intervals, and AlarmManager for long.

Code sample:

if (delay == 0) { Intent intent = new Intent(context, SoundService.class); intent.putExtra(SoundService.SOUND, sound); context.startService(intent); } else if (delay <= 60) { (new Handler()).postDelayed(new Runnable() { @Override public void run() { Intent intent = new Intent(context, SoundService.class); intent.putExtra(SoundService.SOUND, sound); context.startService(intent); } }, delay * 1000); } else if (delay > 60) { final int SDK_INT = Build.VERSION.SDK_INT; Intent intent = new Intent(context, AlarmBroadcastReceiver.class); intent.setAction("action_play: " + sound); intent.putExtra(SoundService.SOUND, sound); PendingIntent pIntent = PendingIntent.getBroadcast(context, 0, intent, 0); AlarmManager alarmManager = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE); long runTime = System.currentTimeMillis() + delay * 1000; if (SDK_INT < Build.VERSION_CODES.KITKAT) { alarmManager.set(AlarmManager.RTC_WAKEUP, runTime, pIntent); } else if ((SDK_INT >= Build.VERSION_CODES.KITKAT) && (SDK_INT < Build.VERSION_CODES.M)) { alarmManager.setExact(AlarmManager.RTC_WAKEUP, runTime, pIntent); } else if (SDK_INT >= Build.VERSION_CODES.M) { alarmManager.setExactAndAllowWhileIdle(AlarmManager.RTC_WAKEUP, runTime, pIntent); } }

Where SoundService - Service with sound playing functionality, delay - delay before playing, in seconds, AlarmBroadcastReceiver -

public class AlarmBroadcastReceiver extends BroadcastReceiver { final String LOG_TAG = this.getClass().getName(); @Override public void onReceive(Context ctx, Intent intent) { if (intent.getAction().startsWith("action_play:")){ Intent playIntent = new Intent(ctx, SoundService.class); playIntent.putExtra(SoundService.SOUND, intent.getStringExtra(SoundService.SOUND)); ctx.startService(playIntent); } }