在初始化HierarchyViewer的实例过程中，HierarchyViewer会调用自己的成员方法setupViewServer来把ViewServer装备好，那么我们这里先看下这个方法：
39 private void setupViewServer() {
40 DeviceBridge.setupDeviceForward(mDevice);
41 if (!DeviceBridge.isViewServerRunning(mDevice)) {
42 if (!DeviceBridge.startViewServer(mDevice)) {
43 // TODO: Get rid of this delay.
44 try {
45 Thread.sleep(2000);
46 } catch (InterruptedException e) {
47 }
48 if (!DeviceBridge.startViewServer(mDevice)) {
49 Log.e(TAG, "Unable to debug device " + mDevice);
50 throw new RuntimeException("Could not connect to the view server");
51 }
52 return;
53 }
54 }
55 DeviceBridge.loadViewServerInfo(mDevice);
56 }
代码14-4-1 HierarchyViewer－setupViewServer
