While developing an app, you encounter multiple issues that need an observing eye.
What can be those issues?
And how you can resolve them?
Let’s learn some common issues of mobile app development with their possible solutions below:
A screen element changes the style and contents rapidly and the user cannot process the information. This is an example of a bad user experience.
Screen flickering element can cause because of different reasons such as:
Rapid screen state changes
When the fetched data is associated with a widget displayed on the screen or with a condition that has a logic affecting the widget’s visibility or style, we observe the screen flickering. Also, rapid changes in the data can also be the cause of a flickering effect.
Dynamic or delayed CSS styling
When the calculations are going on after the screen is rendered, it may affect the widget’s style.
Or maybe the screen-specific CSS is taking time to load which causes flickering on the screen at the time when some of the screen-level CSS is applied to screen elements.
If changes in the data cause flickering:
- Make the analysis and review of the conditional logic used in the screen and its components.
- Make the analysis of the aggregate timing and data actions in runtime (e.g., when will the resulting data be available and what are its consequences on the logic that was implemented).
- Use buffer data (meaning keep the previous state of the data while determining the new data) during the transitions to keep the transition smooth.
For style-related flickering:
- Do not show the elements before style calculations are done.
- For the element, show a placeholder.
- Do not put the defining part of your CSS in the screen but in the theme, so it will keep it loaded during the time of transitions.
- Use selectors to target a given screen while defining CSS at the theme level. This way, your other screens are protected from overrides.
Slow Transition between Screens
The transition tie between the two given screens is too slow.
The reason for slow transitioning is:
Slow operations performed in On Initialize screen event handler
The operations include calling native plugin actions or invoking server actions are being done in the On Initialize event handler of the destination screen. As the event has occurred before the screen load, this might slow down the screen load time.
- Remember to not perform any slow operation in the On Initialize screen event handler. Perform these operations on another event handler like On Ready occurs after the page is displayed. After deploying your changes, test your app thoroughly as it might have an impact on the behavior of your application.
- If the above suggestions do not help, use the Performance Tab in Chrome’s Developer Tools to do the additional performance troubleshooting.
Missing Data in Device
A mobile app displaying data is not present on the screen.
Your application’s offline synchronization contains errors and the data that should be there in the device is not fully copied.
Aggregates are not well defined
The data is synchronized but the aggregate is configured on querying local storage entities in a way that is filtering out the necessary data.
- Make sure that the data which is missing is present in the server database. If it is there, the error you are receiving can be in the implementation of the synchronization process between the device and the server.
- Make sure that the data which is missing is present in the local storage of the device. For example, go to your app and create a screen to browse the data of a local storage entity on your device.
- If your data is present in the local storage of the device, review the queries of your application and aggregate definitions. Keep an eye on the JOINS and their settings.
- If your data is not present in the local storage of the device, review the synchronization implementation of your data to find errors in filters like a User ID or date range or any other filter you might be using in the synchronization process.