在Android中启动服务
我想在某个活动开始时致电服务。 所以，这里的服务类：
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(); } } 这就是我所说的：
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activity的onCreate结尾被调用。 我已经debugging过，并没有抛出exception。
任何想法？
也许你没有清单中的服务，或者没有符合你的行为的<intent-filter> 。 检查LogCat（通过adb logcat ，DDMS或Eclipse中的DDMS透视图）应该会产生一些警告，这可能会有所帮助。
更可能的是，您应该通过以下方式启动服务：
startService(new Intent(this, UpdaterServiceManager.class));
startService(new Intent(this, MyService.class));
只写这行对我来说是不够的。 服务仍然没有工作。 只有在清单上注册服务之后，所有事情才有效
<application android:icon="@drawable/ic_launcher" android:label="@string/app_name" > ... <service android:name=".MyService" android:label="My Service" > </service> </application>
Java代码启动 服务 ：
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));
MyService.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"); } }
将此服务定义到项目的清单文件中：
在Manifest文件中添加以下标签：
<service android:enabled="true" android:name="com.my.packagename.MyService" />
完成
我喜欢使它更具活力
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
<service android:enabled="true" android:name=".MyService.class" />
Activty：startService（new Intent（this，ChatService.class））;
清单 –
<service android:name=.ChatService" android:enabled="true" android:process=":ChatProcess"/>
