怎样在网站上做友情链接天元建设集团有限公司单位性质

public class MyService extends Service {@Overridepublic void onCreate() {super.onCreate();}@Overridepublic int onStartCommand(Intent intent, int flags, int startId) {return startCommandReturnId;}@Overridepublic void onDestroy() {super.onDestroy();}@Nullable@Overridepublic IBinder onBind(Intent intent) {return null;}
}

....// 业务启动流程结束
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O && (guildInfo != null)) {getApp().applicationContext.startForegroundService(serviceIntent)
} else {getApp().applicationContext.startService(serviceIntent)}

// Service类中
public int onStartCommand(Intent intent, int flags, int startId) {....
mAudioNotification = createAudioNotification(); //创建通知栏展示内容
startForeground(NID, mAudioNotification); // 展示服务通知....
}

Context.startForegroundService() did not then call Service.startForeground(): ServiceRecord

@Overridepublic ComponentName startService(Intent service) {warnIfCallingFromSystemProcess();return startServiceCommon(service, false, mUser);}@Overridepublic ComponentName startForegroundService(Intent service) {warnIfCallingFromSystemProcess();return startServiceCommon(service, true, mUser);}private ComponentName startServiceCommon(Intent service, boolean requireForeground, UserHandle user）

private ComponentName startServiceCommon(Intent service, boolean requireForeground,UserHandle user) {try {validateServiceIntent(service);service.prepareToLeaveProcess(this);ComponentName cn = ActivityManager.getService().startService(mMainThread.getApplicationThread(), service,service.resolveTypeIfNeeded(getContentResolver()), requireForeground,getOpPackageName(), getAttributionTag(), user.getIdentifier());if (cn != null) {// 异常匹配if (cn.getPackageName().equals("!")) {throw new SecurityException("Not allowed to start service " + service+ " without permission " + cn.getClassName());} else if (cn.getPackageName().equals("!!")) {throw new SecurityException("Unable to start service " + service+ ": " + cn.getClassName());} else if (cn.getPackageName().equals("?")) {throw ServiceStartNotAllowedException.newInstance(requireForeground,"Not allowed to start service " + service + ": " + cn.getClassName());}}....return cn;} catch (RemoteException e) {throw e.rethrowFromSystemServer();}}

if (forcedStandby || (!r.startRequested && !fgRequired)) {// 调用startService，(!r.startRequested && !fgRequired) 条件为truefinal int allowed = mAm.getAppStartModeLOSP(r.appInfo.uid, r.packageName,r.appInfo.targetSdkVersion, callingPid, false, false, forcedStandby);if (allowed != ActivityManager.APP_START_MODE_NORMAL) {if (allowed == ActivityManager.APP_START_MODE_DELAYED || forceSilentAbort) {return null;}if (forcedStandby) {if (fgRequired) {return null;}}UidRecord uidRec = mAm.mProcessList.getUidRecordLOSP(r.appInfo.uid);return new ComponentName("?", "app is in background uid " + uidRec);}}

// Unified app-op and target sdk check@GuardedBy(anyOf = {"this", "mProcLock"})int appRestrictedInBackgroundLOSP(int uid, String packageName, int packageTargetSdk) {// 安卓8限制if (packageTargetSdk >= Build.VERSION_CODES.O) {if (DEBUG_BACKGROUND_CHECK) {Slog.i(TAG, "App " + uid + "/" + packageName + " targets O+, restricted");}return ActivityManager.APP_START_MODE_DELAYED_RIGID;}.....}

private final void sendServiceArgsLocked(ServiceRecord r, boolean execInFg,boolean oomAdjusted) throws TransactionTooLargeException {...ArrayList<ServiceStartArgs> args = new ArrayList<>();while (r.pendingStarts.size() > 0) {ServiceRecord.StartItem si = r.pendingStarts.remove(0);...if (r.fgRequired && !r.fgWaiting) {if (!r.isForeground) {<!--监听是否5S内startForeground-->scheduleServiceForegroundTransitionTimeoutLocked(r);} ...try {r.app.thread.scheduleServiceArgs(r, slice);}

void scheduleServiceForegroundTransitionTimeoutLocked(ServiceRecord r) {if (r.app.mServices.numberOfExecutingServices() == 0 || r.app.getThread() == null) {return;}Message msg = mAm.mHandler.obtainMessage(ActivityManagerService.SERVICE_FOREGROUND_TIMEOUT_MSG);msg.obj = r;r.fgWaiting = true;mAm.mHandler.sendMessageDelayed(msg, mAm.mConstants.mServiceStartForegroundTimeoutMs);}
/*** How long the Context.startForegroundService() grace period is to get around to* calling Service.startForeground() before we generate ANR.*/volatile int mServiceStartForegroundTimeoutMs = DEFAULT_SERVICE_START_FOREGROUND_TIMEOUT_MS;

 修改 r.fgWaiting = true启动任务延迟TimeoutMs后发送 SERVICE_FOREGROUND_TIMEOUT_MSG

// handler处理 SERVICE_FOREGROUND_TIMEOUT_MSG
void serviceForegroundTimeout(ServiceRecord r) {ProcessRecord app;synchronized (mAm) {if (!r.fgRequired || !r.fgWaiting || r.destroying) {return;}app = r.app;if (app != null && app.isDebugging()) {// The app's being debugged; let it ridereturn;}if (DEBUG_BACKGROUND_CHECK) {Slog.i(TAG, "Service foreground-required timeout for " + r);}r.fgWaiting = false;stopServiceLocked(r, false);}if (app != null) {
// 就是我们之前遇到的异常final String annotation = "Context.startForegroundService() did not then call "+ "Service.startForeground(): " + r;Message msg = mAm.mHandler.obtainMessage(ActivityManagerService.SERVICE_FOREGROUND_TIMEOUT_ANR_MSG);SomeArgs args = SomeArgs.obtain();args.arg1 = app;args.arg2 = annotation;msg.obj = args;mAm.mHandler.sendMessageDelayed(msg,mAm.mConstants.mServiceStartForegroundAnrDelayMs);}}

private final void bringDownServiceLocked(ServiceRecord r) {...if (r.fgRequired) {r.fgRequired = false;r.fgWaiting = false;mAm.mAppOpsService.finishOperation(AppOpsManager.getToken(mAm.mAppOpsService),AppOpsManager.OP_START_FOREGROUND, r.appInfo.uid, r.packageName);mAm.mHandler.removeMessages(ActivityManagerService.SERVICE_FOREGROUND_TIMEOUT_MSG, r);if (r.app != null) {Message msg = mAm.mHandler.obtainMessage(ActivityManagerService.SERVICE_FOREGROUND_CRASH_MSG);msg.obj = r.app;msg.getData().putCharSequence(ActivityManagerService.SERVICE_RECORD_KEY, r.toString());mAm.mHandler.sendMessage(msg);}}