如何在 Android 中设置持久/定期计划? [英] How to set a persistent/regular schedule in Android?

问题描述

如何在每个指定时间(例如每天早上 5 点)执行一个操作(可能是一个意图)?它必须在设备重启后保持不变，类似于 cron 的工作方式.

How can I execute an action (maybe an Intent) on every specified time (e.g. Every day on 5AM)? It has to stay after device reboots, similar to how cron works.

我不确定是否可以使用 AlarmManager，或者我可以吗?

I am not sure if I can use AlarmManager for this, or can I?

推荐答案

如果你想让它在设备重启后保持，你必须在设备重启后安排警报.

If you want it to stay after the device reboots, you have to schedule the alarm after the device reboots.

您需要拥有 RECEIVE_BOOT_COMPLETED 权限AndroidManifest.xml

You will need to have the RECEIVE_BOOT_COMPLETED permission in your AndroidManifest.xml

<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />

还需要一个 BroadcastReceiver 来捕获意图 ACTION_BOOT_COMPLETED

A BroadcastReceiver is needed as well to capture the intent ACTION_BOOT_COMPLETED

<receiver android:name=".BootCompletedReceiver">
<intent-filter>
<action android:name="android.intent.action.BOOT_COMPLETED" />
</intent-filter>
</receiver>

最后，覆盖 BroadcastReceiver 中的 onReceive 方法.

Lastly, override the onReceive method in your BroadcastReceiver.

public class BootcompletedReceiver extends BroadcastReceiver {

  @Override
  public void onReceive(Context context, Intent intent) {
     //set alarm
  }
}

查看 setRepeating AlarmManager 方法来安排Android cron".

Look at the setRepeating method of AlarmManager to schedule the 'Android cron'.

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