Category: Android Studio

Now that some of the basic concepts of Android development using Android Studio have been covered, this is a good time to introduce the Android Studio Apply Changes feature. As all experienced developers know, every second spent waiting for an app to compile and run is better spent writing and refining code. Introducing Apply Changes…

The previous chapter introduced the basic concepts of creating and modifying user interface layouts in Java code using the ConstraintLayout and ConstraintSet classes. This chapter will put these concepts into practice by creating an example layout created entirely in Java code and without using the Android Studio Layout Editor tool. Creating the Example Project in…

Until this point in the book, all user interface design tasks have been performed using the Android Studio Layout Editor tool, either in text or design mode. An alternative to writing XML resource files or using the Android Studio Layout Editor is to write Java code to directly create, configure and manipulate the view objects…

If the previous few chapters have achieved their objective, it should now be clearer as to the importance of saving and restoring the state of a user interface at particular points in the lifetime of an activity. In this chapter, we will extend the example application created in A Java Android Activity State Changes Tutorial…

The previous chapters have discussed in detail the different states and lifecycles of the activities comprising an Android application. In this chapter, we will put the theory of handling activity state changes into practice by creating an example application. The purpose of this example application is to provide a real-world demonstration of an activity as…

Based on the information outlined in the chapter entitled Android App and Activity Lifecycles, it is now evident that the activities and fragments that make up an application pass through various different states during the application’s lifespan. The Android runtime system imposes the change from one state to the other and is, therefore, largely beyond…

An essential part of developing Android apps involves the interaction between the code and the views that make up the user interface layouts. This chapter will look at the options available for gaining access to layout views in code, emphasizing an option known as view binding. Once the basics of view bindings have been covered,…

The preceding chapters of this book have covered the steps necessary to configure an environment suitable for developing Android applications using the Android Studio IDE. Before moving on to slightly more advanced topics, now is a good time to validate that all required development packages are installed and functioning correctly. The best way to achieve…