在Android中启动服务
在Android中启动服务
提问于 2011-01-22 09:16:39
我想要在某个活动开始时调用服务。因此，下面是Service类：
public class UpdaterServiceManager extends Service {
private final int UPDATE_INTERVAL = 60 * 1000;
private Timer timer = new Timer();
private static final int NOTIFICATION_EX = 1;
private NotificationManager notificationManager;
public UpdaterServiceManager() {}
@Override
public IBinder onBind(Intent intent) {
// TODO Auto-generated method stub
return null;
}
@Override
public void onCreate() {
// Code to execute when the service is first created
}
@Override
public void onDestroy() {
if (timer != null) {
timer.cancel();
}
}
@Override
public int onStartCommand(Intent intent, int flags, int startid) {
notificationManager = (NotificationManager)
getSystemService(Context.NOTIFICATION_SERVICE);
int icon = android.R.drawable.stat_notify_sync;
CharSequence tickerText = "Hello";
long when = System.currentTimeMillis();
Notification notification = new Notification(icon, tickerText, when);
Context context = getApplicationContext();
CharSequence contentTitle = "My notification";
CharSequence contentText = "Hello World!";
Intent notificationIntent = new Intent(this, Main.class);
PendingIntent contentIntent = PendingIntent.getActivity(this, 0,
notificationIntent, 0);
notification.setLatestEventInfo(context, contentTitle, contentText,
contentIntent);
notificationManager.notify(NOTIFICATION_EX, notification);
Toast.makeText(this, "Started!", Toast.LENGTH_LONG);
timer.scheduleAtFixedRate(new TimerTask() {
@Override
public void run() {
// Check if there are updates here and notify if true
}
}, 0, UPDATE_INTERVAL);
return START_STICKY;
}
private void stopService() {
if (timer != null) timer.cancel();
}
}我是这样称呼它的：
Intent serviceIntent = new Intent();
serviceIntent.setAction("cidadaos.cidade.data.UpdaterServiceManager");
startService(serviceIntent);问题是什么都没有发生。上面的代码块在活动的onCreate的末尾被调用。我已经调试过了，没有抛出异常。
有什么想法吗？
回答 4
Stack Overflow用户
回答已采纳
发布于 2011-01-22 10:19:05
可能您的清单中没有该服务，或者它没有与您的操作相匹配的<intent-filter>。检查LogCat (通过adb logcat、DDMS或Eclipse中的DDMS透视图)应该会发现一些可能有帮助的警告。
更有可能的是，您应该通过以下方式启动服务：
startService(new Intent(this, UpdaterServiceManager.class));Stack Overflow用户
发布于 2012-09-24 03:01:45
startService(new Intent(this, MyService.class));仅仅写这一行对我来说是不够的。服务仍然不起作用。只有在清单中注册了服务之后，一切才能正常工作
<application
android:icon="@drawable/ic_launcher"
android:label="@string/app_name" >
...
<service
android:name=".MyService"
android:label="My Service" >
</service>
</application>Stack Overflow用户
发布于 2015-06-15 12:53:04
我喜欢让它更有活力
Class<?> serviceMonitor = MyService.class;
private void startMyService() { context.startService(new Intent(context, serviceMonitor)); }
private void stopMyService() { context.stopService(new Intent(context, serviceMonitor)); }别忘了宣言
<service android:enabled="true" android:name=".MyService.class" />页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/4765517
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