Android Fung

Notification, Notifications, or Notification(s)? In Android, Quantity Strings could help you to display the correct singular and plural.  Why not let the system to help you? And why you are still displaying something like notification(s)?

  Sometimes, if the image is simple, consider lower the color depth of the image. Squoosh is an online tool to help you to optimize the bitmap image. Android support multiple image format, JPEG, GIF, PNG, WebP, HEIF.  Choose the one which fits you most. Using VectorDrawable is also a good way to reduce the file size of the image.

While displaying text on an image, make sure the text is readable for user. Aovid "white on white", "black on black".  By  Selecting Colors with the Palette API , you can know the major colors in the image, can get the right color for the text overlay.

There are many ways a mobile device connecting to the Internet. Mobile Network and WiFi are the most common, but a device could also connect to Internet by Bluetooth or by Ethernet.  Make sure the app logic is not checking WiFi and Mobile Network only. By  Monitor connectivity status and connection metering , developers could determine whether you have an internet connection by  ConnectivityManager .

FingerprintManager was deprecated 2 years ago. But still, many applications have not migrated to BiometricPrompt. Why keep using FingerpaintManager is bad? It is because user will not know the dialog can be trust or not. To protect users, applications should migrate to BiometricPrompt , especially banking / payment applications.  

There are still many local applications using Android Support Library (com.android.support). Android Support Library was deprecated 2 years ago. The last version (28.0.0) was designed for API Level 28 (Android 8). App updates on Google Play must target Android 10 (API level 29) or higher starting from November 2020 , developers should migrate to Jetpack (AndroidX) ASAP.