如何在 Android 中使用警报管理器启动服务?

编程入门行业动态更新时间:2024-10-22 19:30:19

本文介绍了如何在 Android 中使用警报管理器启动服务?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

在我的应用程序中，我尝试使用警报管理器启动服务.当我单击按钮时，服务应该在我指定的特定时间启动.我的警报管理器代码如下:

In my application, I am trying to start a service using Alarm manager. When I am clicking a button service should start in a particular time which I am giving. My code for Alarm Manager is given below:

public void onClick(View view) { if(view == m_btnActivate) { Calendar cur_cal = Calendar.getInstance(); cur_cal.setTimeInMillis(System.currentTimeMillis()); cur_cal.add(Calendar.SECOND, 50); Log.d("Testing", "Calender Set time:"+cur_cal.getTime()); Intent intent = new Intent(DashboardScreen.this, ServiceClass.class); Log.d("Testing", "Intent created"); PendingIntent pi = PendingIntent.getService(DashboardScreen.this, 0, intent, 0); AlarmManager alarm_manager = (AlarmManager)getSystemService(Context.ALARM_SERVICE); alarm_manager.set(AlarmManager.RTC, cur_cal.getTimeInMillis(), pi); Log.d("Testing", "alarm manager set"); Toast.makeText(this, "ServiceClass.onCreate()", Toast.LENGTH_LONG).show(); } }

下面是我的服务类:

public class ServiceClass extends Service{ @Override public void onCreate() { // TODO Auto-generated method stub super.onCreate(); Log.d("Testing", "Service got created"); Toast.makeText(this, "ServiceClass.onCreate()", Toast.LENGTH_LONG).show(); } @Override public IBinder onBind(Intent arg0) { // TODO Auto-generated method stub return null; } @Override public void onDestroy() { // TODO Auto-generated method stub super.onDestroy(); } @Override public void onStart(Intent intent, int startId) { // TODO Auto-generated method stub super.onStart(intent, startId); Toast.makeText(this, "ServiceClass.onStart()", Toast.LENGTH_LONG).show(); Log.d("Testing", "Service got started"); } }

如果服务将启动，它应该在服务类中打印日志消息.但它没有显示.有人可以帮忙吗?

If the service will start it should print the log messages in the service class. But it is not showing. Can any one help?

推荐答案

这是我用过的，用于从当前时间开始 30 秒后启动服务，

This is what I have used, for starting service after 30 seconds from current time,

Intent intent = new Intent(DashboardScreen.this, ServiceClass.class); PendingIntent pintent = PendingIntent.getService(DashboardScreen.this, 0, intent, 0); AlarmManager alarm = (AlarmManager)getSystemService(Context.ALARM_SERVICE); alarm.setRepeating(AlarmManager.RTC_WAKEUP, cal.getTimeInMillis(), 30*1000, pintent);

尝试一下，让我知道会发生什么......