我能找到的所有示例SyncService代码似乎都未完全或不必要地同步。下面的典型代码在创建单例实例时使用静态锁。publicclassSyncServiceextendsService{privatestaticfinalObjectsSyncAdapterLock=newObject();privatestaticSyncAdaptersSyncAdapter=null;@OverridepublicvoidonCreate(){synchronized(sSyncAdapterLock){if(sSyncAdapter==null){sSyncAdapter=newSyncAda