Every time you would like to test for app upgrade during development, you need to change the versionCode on Android Studio and then followed by a Gradle sync before you can build. That is time consuming right? Here is a little trick that we used in our company’s project, it…

Lately I have been working with Kotlin, the code base is mixed with Java and Kotlin. One of the issues I found is that when Java Gson model is turned to Kotlin, the app crashes. With not much idea in head, I have done something like this: data class Message(@JvmField val address, @JvmField val content) It works🎉! The trick is by adding @JvmField annotation in front of class members. My guess is that by adding @JvmField annotation, it keeps the field in public in Java level. However, I am not able to replicate the issue in a completely new project. Any ideas?🤔

Why should you use RVM instead of using system’s Ruby? It turns out that system’s Ruby doesn’t update fast enough, when you try to update Fastlane, it may be broken. :| Installing RVM on macOS Install Homebrew (I think most of you should have it installed) Install gnupg with brew install gnupg Following the steps in https://rvm.io/rvm/install to install RVM If you are using…

While we are implementing a feature to display the cache size in app for users, we think that there should be a simple function in Android to convert bytes to readable format. So what we got is android.text.format.Formatter.formatFileSize(Context context, long bytes) Looks good, it takes a Context object, a little bit annoying though. But then the interesting part comes up. When I deploy the app on a 7.1 device, it behaves as expected like 10,73,741,824 bytes is showing 1.0 GB, but later when my colleague testing on his 8.1 device, it shows something like 1.1GB

Recently the 9GAG Android app has integrated PublisherAdView to post list. We found a strange bug that the list( RecyclerView ) will shift when we scroll to those PublisherAdView and perform tab changes in ViewPager. We switch from tab 1 and then to tab 2 and then back to tab…

We are trying to use React Native to rebuild the whole app, so that it can be run on iOS and Android with the same code base at the same time. …

Hello World, this is my first Medium article and also my first tech blog. :) Using ViewPager to hold your Fragments is a very common pattern on Android. However, your UI is getting complex and having more and more Fragments on your ViewPager, it will slow down your app. Although…