where is layout of source

if i want get root view,i also by call getWindow().getDecorView().findViewById(android.R.id.content) or findViewById(android.R.id.content).getRootView().so i want to know开发者_StackOverflow社区 if i can find the layout of android.R.id.content. could you tell me where is the layout.you can give me a link or other.thanks

You can use Hierarchy Viewer tool, See the definitons and Steps of how to use this tool in developer guide as shown below,

It shows visual representation of the layout's View hierarchy (the Layout View) and a magnified inspector of the display (the Pixel Perfect View).

To get the Hierarchy Viewer started:

Connect your device or launch an emulator. From a terminal, launch hierarchyviewer from your SDK /tools directory. In the window that opens, you'll see a list of Devices. When a device is selected, a list of currently active Windows is displayed on the right. The is the window currently in the foreground, and also the default window loaded if you do not select another. Select the window that you'd like to inspect and click Load View Hierarchy. The Layout View will be loaded. You can then load the Pixel Perfect View by clicking the second icon at the bottom-left of the window. If you've navigated to a different window on the device, press Refresh Windows to refresh the list of available windows on the right.

Now with the help of this tool, it shows the content is in Frame Layout, pls refer this output given by this tool.