Android 应用关闭时服务未运行
我正在尝试使用AlarmManager和服务实现报警应用程序 在我的活动中,我声明了以下内容以启动alarmserviceAndroid 应用关闭时服务未运行,android,android-service,android-alarms,Android,Android Service,Android Alarms,我正在尝试使用AlarmManager和服务实现报警应用程序 在我的活动中,我声明了以下内容以启动alarmservice Intent intent = new Intent(getApplicationContext(), OnAlarmManager.class); PendingIntent pendingIntent = PendingIntent.getService(getApplicationContext(), 234324243, intent, 0); Al
Intent intent = new Intent(getApplicationContext(), OnAlarmManager.class);
PendingIntent pendingIntent = PendingIntent.getService(getApplicationContext(),
234324243, intent, 0);
AlarmManager alarmManager = (AlarmManager) getSystemService(ALARM_SERVICE);
alarmManager.set(AlarmManager.RTC_WAKEUP, System.currentTimeMillis()+(i * 1000), pendingIntent);
Toast.makeText(getApplicationContext(), "Alarm set in " + i + " seconds", Toast.LENGTH_LONG).show();
我的管理员代码如下所示
public class OnAlarmManager extends Service{
private static final String TAG = "OnAlarmReceiver";
private NotificationManager nm;
@Nullable
@Override
public IBinder onBind(Intent intent) {
return null;
}
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
nm = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
Intent mainActivityIntent = new Intent(this, MainActivity.class);
PendingIntent pIntent = PendingIntent.getActivity(this, 0, mainActivityIntent, 0);
//setting up notification
Notification notification = new NotificationCompat.Builder(this)
.setContentTitle("New Notification")
.setContentText("This is a successfull app on service")
.setSmallIcon(R.mipmap.ic_launcher)
.setContentIntent(pIntent)
.build();
notification.flags |= Notification.FLAG_AUTO_CANCEL;
notification.flags |= Notification.FLAG_SHOW_LIGHTS;
notification.defaults |= Notification.DEFAULT_SOUND;
notification.defaults |= Notification.DEFAULT_VIBRATE;
notification.defaults |= Notification.DEFAULT_LIGHTS;
nm.notify(0, notification);
Toast.makeText(getApplicationContext(), "Alarm has begun", Toast.LENGTH_LONG).show();
Log.i(TAG, "Alarm has begun");
return START_STICKY;
}
}
现在,当我尝试运行此程序时,即使在设置警报后关闭应用程序,在给定时间在JellyBean上运行的设备中也会触发通知。
但在棉花糖上运行的设备中,当应用程序关闭时,永远不会触发服务类
这里缺少的是什么吗?只需将Manifest.xml文件中的服务注册为
<service android:name=".YourServiceClassName" />
为了方便起见,请尝试使用
AlarmManager.setExact
和IntentService
。您的代码将如下所示:
Intent intent = new Intent(OnAlarmManager.ACTION_TRIGGER_ALARM);
PendingIntent pendingIntent = PendingIntent.getService(getApplicationContext(),
234324243, intent, 0);
AlarmManager alarmManager = (AlarmManager) getSystemService(ALARM_SERVICE);
Toast.makeText(getApplicationContext(), "Alarm set in " + i + " seconds", Toast.LENGTH_LONG).show();
if (android.os.Build.VERSION.SDK_INT < Build.VERSION_CODES.KITKAT) {
alarmManager.set(AlarmManager.RTC_WAKEUP, System.currentTimeMillis()+(i * 1000), pendingIntent);
} else {
alarmManager.setExact(AlarmManager.RTC_WAKEUP, System.currentTimeMillis()+(i * 1000), pendingIntent);
}
并在AndroidManifest.xml中添加操作信息:
<service
android:name=".OnAlarmManager"
android:exported="true">
<intent-filter>
<action android:name="com.example.myapplication.ACTION_TRIGGER_ALARM" />
</intent-filter>
</service>
您能试试前台服务吗
从您所说的来看,该服务似乎是在主线程上运行的,它与应用程序一起被终止。已经完成了。如果不这样做,它甚至不会在运行JellyBean的设备上运行,因为它似乎已经在JellyBean设备上运行了,所以服务声明显然必须存在。您可能想先检查这个问题,但没有帮助。应用程序正在运行或在后台运行时会触发通知。但一旦我刷走或关闭应用程序,在使用IntentService时,与之相关的所有内容(接收器、服务)都会被破坏,这要求我在服务类中添加一个构造函数。当我这样做时,下面的构造函数类被添加到ArmManager(字符串名){super(name);}添加此部分会在清单声明中给我一个错误,告诉我Onalarmmanager中没有默认构造函数。此外,应用程序崩溃哦,对不起,我在示例代码中错过了它。检查更新的答案。添加它,就像我提到的问题一样,在后台运行时会触发通知,但一旦我关闭应用程序,一切都会被破坏。应触发报警,处于前台或后台不应影响其工作。真奇怪,你在哪台设备上测试?
<service
android:name=".OnAlarmManager"
android:exported="true">
<intent-filter>
<action android:name="com.example.myapplication.ACTION_TRIGGER_ALARM" />
</intent-filter>
</service>