The circular animal rolls from left to right
along the floor of the big, white
RocketView.
When the blue
button
becomes
enabled,
press it to launch a rocket from the right edge of the screen
that will fly to the left until it hits and immobilizes the animal.
The screenshot was taken when the
android:layout_height
of the button was
wrap_content.
MainActivity.java
RocketView.java.
The constructor with two arguments is called when
activity_main.xml
is inflated.
activity_main.xml
AndroidManifest.xml
build.gradle.
Converted to API 21 so we could run the project on the Android Studio in the classroom.