Android 如何知道在用户不通知时发出通知'；t执行应用程序

我想做一个通知，当用户退出android应用程序时开始计时。若用户在1小时后并没有执行应用程序，它会通知我执行，若用户忽略它，它会执行保存的SMS消息。我在计时器上找到了一些示例，但我不知道如何找到应用程序退出时间。请给我一些完整代码的建议。我非常需要它

TimerTask task = new TimerTask(){
    public void run() {
        try {
            mainTime++;
            int min = mainTime / 60;
            int sec = mainTime % 60;
            String strTime = String.format("%s : %s", min, sec);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
};

Timer mTimer = new Timer();
mTimer.schedule(task, 0, 60000);
Intent sendIntent = new Intent(Intent.ACTION_VIEW);
sendIntent.putExtra("Chack your app", smsBody);                 
sendIntent.putExtra("12345678", phonenumber);               
sendIntent.setType("vnd.android-dir/mms-sms");
startActivity(sendIntent);

---

好的，当应用程序退出时，您需要做的是在本地存储系统时间（可能使用

SharedReferences

）。您可以注册一个

BroadcastReceiver

，当应用程序退出时，当本地存储的时间超过1小时或某个时间时，它将帮助您触发一些操作

---

如果您想知道如何以编程方式处理何时以及如何退出应用程序，请参阅。

您也可以尝试使用Android报警系统。一旦用户退出应用程序，您就可以设置警报。比如：

YourActivityOrFragment.java

@Override
protected void onStop() {
   Calendar c = Calendar.getInstance();
            c.setTimeInMillis(System.currentTimeMillis());
            c.add(Calendar.HOUR,1);
            scheduleAlarm(c.getTimeInMillis());
}

private void scheduleAlarm(long time) {
   Intent yourIntent = new Intent("Some_ID");

   PendingIntent pi = PendingIntent.getBroadcast(YourClass.this, ALARM_ID, yourIntent, PendingIntent.FLAG_CANCEL_CURRENT);

// Put some extras here, if you need so. Like:
// yourIntent.putExtra("field","value");

AlarmManager am = (AlarmManager) getSystemService(Context.ALARM_SERVICE);

am.set(AlarmManager.RTC_WAKEUP,time,pi);
}

public class AlarmReceiver extends BroadcastReceiver {

private static final String LOG_TAG = AlarmReceiver.class.getSimpleName();

@Override
public void onReceive(Context context, Intent intent) {

    Log.d(LOG_TAG, "Alarm fired!");

    Intent it = new Intent(context, YourNotificationHandler.class);

    // Get your Extras here. And do whatever you want, if you need.

    // For what you said, there's no need to start an Activity, so let's handle that alarm as a service.

    context.startService(it);

   // But if for some reason you want to start an Activity, just do it like: 
   // context.startActivity(it);
}

现在，创建一个

BroadcastReceiver

来处理这些警报

AlarmReceiver.java

@Override
protected void onStop() {
   Calendar c = Calendar.getInstance();
            c.setTimeInMillis(System.currentTimeMillis());
            c.add(Calendar.HOUR,1);
            scheduleAlarm(c.getTimeInMillis());
}

private void scheduleAlarm(long time) {
   Intent yourIntent = new Intent("Some_ID");

   PendingIntent pi = PendingIntent.getBroadcast(YourClass.this, ALARM_ID, yourIntent, PendingIntent.FLAG_CANCEL_CURRENT);

// Put some extras here, if you need so. Like:
// yourIntent.putExtra("field","value");

AlarmManager am = (AlarmManager) getSystemService(Context.ALARM_SERVICE);

am.set(AlarmManager.RTC_WAKEUP,time,pi);
}

public class AlarmReceiver extends BroadcastReceiver {

private static final String LOG_TAG = AlarmReceiver.class.getSimpleName();

@Override
public void onReceive(Context context, Intent intent) {

    Log.d(LOG_TAG, "Alarm fired!");

    Intent it = new Intent(context, YourNotificationHandler.class);

    // Get your Extras here. And do whatever you want, if you need.

    // For what you said, there's no need to start an Activity, so let's handle that alarm as a service.

    context.startService(it);

   // But if for some reason you want to start an Activity, just do it like: 
   // context.startActivity(it);
}

}

在您的

AndroidManifest.xml

上声明您的

BroadcastReceiver

<receiver android:name=".AlarmReceiver" >
    <intent-filter>
        <action android:name="Some_ID" />

        <category android:name="android.intent.category.default" />
    </intent-filter>
</receiver>

您可以阅读更多有关警报的信息。 有关

服务的详细信息

。

广播接收机

。 通知，以及。 关于

通知

也可能是一本有趣的读物