![]() ![]() In addition, having a complete view on data handling, network activities, and multithreading are important factors that must be prioritized to support the overall user experience.Īpproaching both “Cold” and “Warm” startsĭuring a cold start, the Activity#onCreate method is called. ![]() Implementing reportFullyDrawn() effectively can improve the user experience of an application. More specifically, you should call reportFullyDrawn() once the app is able to provide a meaningful experience for customers to start interacting e.g., placeholders elements are rendered while you still load assets in the background, possibly for parts of the screen that are currently not visible. In general, we recommended to focus on the customer experience and not necessarily on the technical view. Keep in mind it can be difficult to identify the correct time to call reportFullyDrawn() depending on the architecture used. This is closer to the state you want to log. When calling reportFullyDrawn(), system_server will register the timestamp at time of reception. You need to call Activity.reportFullyDrawn() since the system_server will only pick the timestamp where the first frame was drawn which is not the state a customer can already start using your app. Note: In order to reliably report this metric, we recommended you review your app’s logs to identify which activities which should be factored in before triggering the reportFullyDrawn(). This value represents your app’s Ready to Use time. Consider the completed loading of all resources and display of views as a separate metric, and manually trigger reportFullyDrawn() to let the system know that your activity is finished with lazy loading. It's good practice to show a progress indicator to keep users' attention if there are noticeable delays when loading remote resources over the network.įor Fire TV and Android apps, “Lazy Loading” is when an app enables the initial drawing of the window, loads resources asynchronously in the background, and updates the view hierarchy. At the RTU point your app has completed all rendering on the screen and content fetched from the remote endpoints is displayed. Time for Ready to Use (RTU) describes the time taken by your app to launch until it is fully drawn on the screen and is ready for the user to start interacting. This value represents your app’s Time to Display First Frame. In Fire OS 5 (API level 22) and higher, logcat provides a value called Displayed representing the time elapsed between launching the process and the completion of drawing the first frame of the corresponding activity on the screen. During this period, your app may draw its background, initiate navigation, load local assets, and render placeholders for the content loaded either locally or fetched from remote endpoint. Time to Display First Frame is time taken by your app to launch until the first frame is displayed to the user. ![]()
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