当我尝试在API21之前的设备上运行我的应用程序时，出现了这个奇怪的错误:I/Choreographer:Skipped39frames!Theapplicationmaybedoingtoomuchworkonitsmainthread.12-1007:58:44.1794469-4472/projects.test.com.webviewtestD/dalvikvm:GC_CONCURRENTfreed156K,4%free4561K/4744K,paused4ms+12ms,total76ms12-1007:58:44.4094469-4469/projects.test.com