Debugging

Use the Chrome Remote Debugger to debug a Cast application.

Chrome Remote Debugger

Launch Chrome Remote Debugger for a particular Google Cast device as follows:

To debug Cast apps on an Android TV device, see Android TV: Debugging.

To debug a receiver app on a Chromecast device, do the following:

  1. Register your application and Google Cast device on the Google Cast SDK Developer Console.

    Both the application and device must be registered in order for you to perform debugging.

  2. Start your sender app and cast to the Google Cast device to load the receiver app for debugging. Make sure your sender and receiver devices are connected to the same network.

  3. In the Chrome browser, enter the following in the address field to go to the Chrome inspector:

    chrome://inspect
    A list of Cast-enabled devices on that network appears.

  4. Select the device for the receiver app you want to debug by clicking its Inspect link.

    An inspector window should open, enabling you to remotely debug the receiver app.

  5. In the Chrome Remote Debugger console, enable debug logging, by entering the following:

    cast.framework.CastReceiverContext.getInstance().setLoggerLevel(cast.framework.LoggerLevel.DEBUG);
    Full DOM manipulation is supported as well as the full Chrome JavaScript REPL (console), which will allow you to tinker with the running Cast receiver app.

    When your receiver is torn down (lifecycle ended), the debugger will become inactive with a warning message along the top. At this point you can no longer interact with the debugger. To restart debugging, you must restart the receiver app and then reload the inspector.

Breakpoints

You can add manual breakpoints to your code by using debugger; within your receiver code.

Local Caching

Use window.location.reload(true); to perform a forced reload that flushes the cache of the receiver application.

Preserving logs between sessions

You can preserve the logs between sessions by clicking the gear icon within the debugger and checking the box next to “Preserve log upon navigation”.