Hierarchy Viewer默认打开“Tree View”窗口无法显示显示Performance indicators：
但选中根视图再点击按钮“Obtain layout times for tree rooted at selected node”：
就可以显示：
其上该视图性能的颜色指示符从左到右依次为：Measure、Layout和Draw，其中红色代表此树中该视图渲染最慢即占用总渲染时间的80%或其以上，绿色代表此树中该视图渲染时长小于总渲染时间的50%，黄色代表此树种该视图渲染时长50%或其以上但低于80%。
public class ProfileNodesAction extends SelectedNodeEnabledAction implements ImageAction {
...
public ProfileNodesAction() {
super("Profile Node");
ImageLoader imageLoader = ImageLoader.getLoader(HierarchyViewerDirector.class);
mImage = imageLoader.loadImage("profile.png", Display.getDefault()); //$NON-NLS-1$
setImageDescriptor(ImageDescriptor.createFromImage(mImage));
setToolTipText("Obtain layout times for tree rooted at selected node");
}
...
@Override
public void run() {
HierarchyViewerDirector.getDirector().profileCurrentNode();
}
...
public void profileCurrentNode() {
final DrawableViewNode selectedNode = TreeViewModel.getModel().getSelection();
if (selectedNode != null) {
executeInBackground("Profile Node", new Runnable() {
@Override
public void run() {
IHvDevice hvDevice = getHvDevice(selectedNode.viewNode.window.getDevice());
hvDevice.loadProfileData(selectedNode.viewNode.window, selectedNode.viewNode);
// Force the layout viewer to redraw.
TreeViewModel.getModel().notifySelectionChanged();
}
});
}
}
public static boolean loadProfileData(Window window, ViewNode viewNode) {
DeviceConnection connection = null;
try {
connection = new DeviceConnection(window.getDevice());
connection.sendCommand("PROFILE " + window.encode() + "" + viewNode.toString()); //$NON-NLS-1$
BufferedReader in = connection.getInputStream();
int protocol;
synchronized (sViewServerInfo) {
protocol = sViewServerInfo.get(window.getDevice()).protocolVersion;
}
if (protocol < 3) {
return loadProfileData(viewNode, in);
} else {
boolean ret = loadProfileDataRecursive(viewNode, in);
if (ret) {
viewNode.setProfileRatings();
}
return ret;
}
} catch (Exception e) {
Log.e(TAG, "Unable to load profiling data for window " + window.getTitle()
+ " on device " + window.getDevice());
} finally {
if (connection != null) {
connection.close();
}
}
return false;
}
private static boolean loadProfileData(ViewNode node, BufferedReader in) throws IOException {
String line;
if ((line = in.readLine()) == null || line.equalsIgnoreCase("-1 -1 -1") //$NON-NLS-1$
|| line.equalsIgnoreCase("DONE.")) { //$NON-NLS-1$
return false;
}
String[] data = line.split("");
node.measureTime = (Long.parseLong(data[0]) / 1000.0) / 1000.0;
node.layoutTime = (Long.parseLong(data[1]) / 1000.0) / 1000.0;
node.drawTime = (Long.parseLong(data[2]) / 1000.0) / 1000.0;
return true;
}
public static boolean loadProfileDataRecursive(ViewNode node, BufferedReader in)
throws IOException {
if (!loadProfileData(node, in)) {
return false;
}
for (int i = 0; i < node.children.size(); i++) {
if (!loadProfileDataRecursive(node.children.get(i), in)) {
return false;
}
}
return true;
}
public class ViewNode {
public static enum ProfileRating {
RED, YELLOW, GREEN, NONE
};
private static final double RED_THRESHOLD = 0.8;
private static final double YELLOW_THRESHOLD = 0.5;
...
public void setProfileRatings() {
final int N = children.size();
if (N > 1) {
double totalMeasure = 0;
double totalLayout = 0;
double totalDraw = 0;
for (int i = 0; i < N; i++) {
ViewNode child = children.get(i);
totalMeasure += child.measureTime;
totalLayout += child.layoutTime;
totalDraw += child.drawTime;
}
for (int i = 0; i < N; i++) {
ViewNode child = children.get(i);
if (child.measureTime / totalMeasure >= RED_THRESHOLD) {
child.measureRating = ProfileRating.RED;
} else if (child.measureTime / totalMeasure >= YELLOW_THRESHOLD) {
child.measureRating = ProfileRating.YELLOW;
} else {
child.measureRating = ProfileRating.GREEN;
}
if (child.layoutTime / totalLayout >= RED_THRESHOLD) {
child.layoutRating = ProfileRating.RED;
} else if (child.layoutTime / totalLayout >= YELLOW_THRESHOLD) {
child.layoutRating = ProfileRating.YELLOW;
} else {
child.layoutRating = ProfileRating.GREEN;
}
if (child.drawTime / totalDraw >= RED_THRESHOLD) {
child.drawRating = ProfileRating.RED;
} else if (child.drawTime / totalDraw >= YELLOW_THRESHOLD) {
child.drawRating = ProfileRating.YELLOW;
} else {
child.drawRating = ProfileRating.GREEN;
}
}
}
for (int i = 0; i < N; i++) {
children.get(i).setProfileRatings();
}
}
/**
* This class is used for connecting to a device in debug mode running the view
* server.
*/
public class DeviceConnection {
...
public void sendCommand(String command) throws IOException {
BufferedWriter out = getOutputStream();
out.write(command);
out.newLine();
out.flush();
}
...