Kotlin Programming: The Big Nerd Ranch Guide, First Edition

Saved Instance State

Your character attribute app is really shaping up. You can press GENERATE and create character stats to your heart’s content. But there is still a problem. To see it, run the emulator, then simulate rotating the phone by clicking on one of the rotation icons in the emulator options window (Figure 21.16):

Figure 21.16  Rotating the emulator

The UI shows different character data (Figure 21.17):

Figure 21.17  Different character data after rotating

The data shown in the UI changed because of how Android’s ...