Font sizes should be large enough for the user to see.Ĥ. Input components should be easy to tap and make a selection. Menus should offer options that are easy to find and require minimal scrolling. Having 20 small items for a user to tap isn’t the best idea. UI elements should be larger and easy for users to tap with their fingers.

Your UI components must make it easy for a user to type a value (e.g., in a text box field) and then tap to go to the next element. Users tap with their fingers and type with their thumbs. It’s a completely different world in mobile development. Using UI elements that work better with a mouse and keyboard Too many images will slow down your app’s performance.ģ. You should also limit the number of images on one screen. They can still maintain most of their quality, but they must have a reduced size. Images should be designed or sized specifically for mobile apps. When you use images, always consider that users might have to deal with low bandwidth and data charges. Mobile devices still haven’t caught up to the speeds of LAN connections, and many users pay high fees when they go over their dedicated data allocation for the month.

Many developers disregard low-bandwidth users, because high-bandwidth is so common in most areas. Writing apps that aren’t optimized for low bandwidth This will avoid user confusion and prevent the “Application Not Responding” dialog box from displaying.Ģ. When your app needs to check for network resources or make a call to a remote API, consider using asynchronous cause and threads that perform the background action while still allowing your users to interact with the app. Users may not be aware that short hangs in the app can simple mean something is processing in the background. If you attempt to make an API call or use remote services, it can cause your application to hang.

You shouldn’t assume users always have instant, high-bandwidth access to the internet with a mobile app. When you work with cloud applications, the assumption is that the user is connected to the internet while they’re accessing your application. Common mistakes that Android developers make Learn about the cost to hire an android app developer. Rates can vary due to many factors, including expertise and experience, location, and market conditions.

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