首先，确保您有以下权限：

然后，在您的代码中，设置AlarmManager时应该使用以下代码：

AlarmManager alarmManager = (AlarmManager) getSystemService(ALARM_SERVICE);

Intent intent = new Intent(this, MyBroadcastReceiver.class);
PendingIntent pendingIntent = PendingIntent.getBroadcast(this, 0, intent, 0);

long now = System.currentTimeMillis();
long interval = 60 * 1000; // 1 minute

alarmManager.setRepeating(AlarmManager.RTC_WAKEUP, now + interval, interval, pendingIntent);

您需要一个BroadcastReceiver类来处理AlarmManager触发的事件。例如：

public class MyBroadcastReceiver extends BroadcastReceiver {

    @Override
    public void onReceive(Context context, Intent intent) {
        Toast.makeText(context, "Alarm Manager is working", Toast.LENGTH_SHORT).show();
    }
}

最后，您需要确保在AndroidManifest.xml文件中注册BroadcastReceiver：

这样，您的AlarmManager和BroadcastReceiver应该会在正确的时间间隔执行了。