Android in depth

ListAdapter renewed Every Android developer has worked with the RecyclerView when a list of content needs to be shown. Before the RecyclerView Android offered the widget ListAdapter , with bad performance and several other issues. Since the Android support lib version 27.1.0 Google added a new ListAdapter which extends RecyclerView.Adapter to make life even easier. Yes it has the name ListAdapter again :(, but for the rest it is completely different! The simplified ListAdapter To create a custom ListAdapter override the methods onCreateViewHolder() and onBindViewHolder(). All other methods are already handled by the ListAdapter and don't need any attention anymore. onCreateViewHolder() : Called when RecyclerView needs a new RecyclerView.ViewHolder of the given type to represent an item. onBindViewHolder() : Called by RecyclerView to display the data at the specified position. The ListAdapter constructor requ...

What is a App Bundle An Android App Bundle is a new upload format that includes all your app's compiled code and resources, but defers APK generation and signing to Google Play. ... So, users can download apps as large as 500MB and, with dynamic delivery, all of that storage is used for only the code and resources they need to run the app. source: https://developer.android.com/guide/app-bundle Google is actively trying decrease the sizes of apks, first with Multiple APK support . But this was not really a success as most developer should didn't use this feature. With App Bundle it's automatically executed on the background when the App Bundle is uploaded to the play store. This feature is called Dynamic Delivery .For each language, density and ABI (Application Binary Interface) an apk is generated with only the required content. This results in smaller apk's, which result in faster download times and less memory usage. ...

At the Google I/O 2018 AndroidX is announced. To prevent any miscommunication about what parts are from Android os and which parts are from extra supporting libraries. As app developer I'm always looking to improve how to build app and use the best tool / libraries to get maximal results. Migrate Android projects, using support libraries, to AndroidX to be ready for further updates. AndroidX packages With the implementation of AndroidX all API package naming is updated. Below we see an example of pre AndroidX packages com.android.support:appcompat-v7 and com.android.support.test.espresso . implementation 'com.android.support:appcompat-v7:27.1.1' implementation 'com.android.support.constraint:constraint-layout:1.1.0' implementation 'com.android.support:design:27.1.1' testImplementation 'junit:junit:4.12' androidTestImplementation 'com.android.support.test:runner:1.0.2' androidTestImplementation 'com.android...