Each screen in an Android application is represented ... Make your class extend the activity class as in the following example code: public class DataActivity extends Activity { //class ...

This is code needed for the vast majority of apps and to get that “Hello World” example up and running ... Let’s look at the Android activity lifecycle — how it handles things like ...

For example <activity android:name=”.MainActivity”> will be resolved to com.jessicathornsby.myapplication. After resolving the Manifest class names and namespacing the R class, the build tools ...