1. 长时间卡在 MSG_WINDOW_FOCUS_CHANGED 条目中
public void handleMessage(Message msg) //android/view/ViewRootImpl.java
Trace.traceBegin(Trace.TRACE_TAG_VIEW, getMessageName(msg)); //这里打印条目有 MSG_WINDOW_FOCUS_CHANGED
handleMessageImpl(msg);
Trace.traceEnd(Trace.TRACE_TAG_VIEW);
handleMessageImpl(msg);
case MSG_WINDOW_FOCUS_CHANGED:
handleWindowFocusChanged(); //ViewRootImpl.java
标签：ftrace,Trace,18,CHANGED,FOCUS,待解,MSG,WINDOW,msg From： https://www.cnblogs.com/hellokitty2/p/17607116.html