在Android中启动服务 _android

一卷旌收千骑虏，万全身出百重围。这篇文章主要讲述在Android中启动服务相关的知识，希望能为你提供帮助。
我想在某个活动开始时调用服务。那么，这是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(); } }

以下是我称之为：

Intent serviceIntent = new Intent(); serviceIntent.setAction("cidadaos.cidade.data.UpdaterServiceManager"); startService(serviceIntent);

问题是没有任何反应。上面的代码块在活动的onCreate末尾调用。我已经调试过，没有抛出任何异常。
任何的想法？
答案可能您的清单中没有该服务，或者它没有与您的操作匹配的

<
intent-filter>

。检查LogCat（通过adb logcat，DDMS或Eclipse中的DDMS透视图）应该会发出一些可能有帮助的警告。
更可能的是，您应该通过以下方式启动服务：

startService(new Intent(this, UpdaterServiceManager.class));

另一答案

startService(new Intent(this, MyService.class));

写这条线对我来说还不够。服务仍然无法正常工作。只有在清单上注册服务后，一切都有效

< application android:icon="@drawable/ic_launcher" android:label="@string/app_name" > ...< service android:name=".MyService" android:label="My Service" > < /service> < /application>

另一答案启动服务的java代码：
从活动开始服务：

startService(new Intent(MyActivity.this, MyService.class));

从片段开始服务：

getActivity().startService(new Intent(getActivity(), MyService.class));

my service.Java:

import android.app.Service; import android.content.Intent; import android.os.Handler; import android.os.IBinder; import android.util.Log; public class MyService extends Service {private static String TAG = "MyService"; private Handler handler; private Runnable runnable; private final int runTime = 5000; @Override public void onCreate() { super.onCreate(); Log.i(TAG, "onCreate"); handler = new Handler(); runnable = new Runnable() { @Override public void run() {handler.postDelayed(runnable, runTime); } }; handler.post(runnable); }@Override public IBinder onBind(Intent intent) { return null; }@Override public void onDestroy() { if (handler != null) { handler.removeCallbacks(runnable); } super.onDestroy(); }@Override public int onStartCommand(Intent intent, int flags, int startId) { return START_STICKY; }@SuppressWarnings("deprecation") @Override public void onStart(Intent intent, int startId) { super.onStart(intent, startId); Log.i(TAG, "onStart"); }}

将此服务定义到Project的清单文件中：
在Manifest文件中添加以下标记：

< service android:enabled="true" android:name="com.my.packagename.MyService" />

【在Android中启动服务】完成
另一答案我喜欢让它变得更有活力

Class< ?> serviceMonitor = MyService.class; private void startMyService() { context.startService(new Intent(context, serviceMonitor)); } private void stopMyService(){ context.stopService(new Intent(context, serviceMonitor)); }

不要忘记清单