AlarmReceiver 与IntentService的使用

public class GetSmsService extends IntentService{
    private AlarmManager alarmManager = null;
    private PendingIntent alarmIntent = null;
    
    public GetSmsService(){
        super("WtacService");
    }
    
    public GetSmsService(String name) {
        super(name);
    }

    @Override
    public IBinder onBind(Intent arg0) {
        return null;
    }
    
    @Override
    public void onCreate() {
        super.onCreate();
        alarmManager = (AlarmManager)this.getSystemService(Context.ALARM_SERVICE);
        String ALARM_ACTION = "com.wzh.receiver.ACTION_WTAC_ALAEM";
        Intent intentTo = new Intent(ALARM_ACTION);
        alarmIntent = PendingIntent.getBroadcast(this, 0, intentTo, 0);
    }
    
    @Override
    protected void onHandleIntent(Intent intent) {
        final Context context = this.getApplicationContext();
        
        int alarmType = AlarmManager.ELAPSED_REALTIME_WAKEUP;
        long triggerAtMillis = SystemClock.elapsedRealtime()+(5*1000);
        long intervalMillis = 5*1000;    //间隔时间
        alarmManager.setInexactRepeating(alarmType, triggerAtMillis, intervalMillis, alarmIntent);
        if(PhoneInfo.isConnectInternet(context)){
            System.out.println("从服务器获取数据："+new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(new Date()));
            try {
                Thread.sleep(2*1000);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
            System.out.println("进行短信发送："+new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(new Date()));
        }
    }

}

public class GetSmsAlarmReceiver extends BroadcastReceiver{

    @Override
    public void onReceive(Context context, Intent intent) {
        Intent startIntent = new Intent(context, GetSmsService.class);
        context.startService(startIntent);
    }

}

public class MainActivity extends Activity {
    
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        
        
    }
        
}

<receiver
            android:name="com.wzh.service.GetSmsAlarmReceiver"
            android:enabled="true"
            android:exported="false" >
            <intent-filter>
                <action android:name="com.wzh.receiver.ACTION_WTAC_ALAEM" />
            </intent-filter>
        </receiver>

        <service
            android:name="com.wzh.service.GetSmsService"
            android:enabled="true"
            android:exported="false" />