Android How to Program, 3/e

6.9 Blocker Subclass of GameElement

Class Blocker (Fig. 6.8)—a subclass of GameElement—represents the blocker, which makes it more difficult for the player to destroy targets. Class Blocker’s missPenalty is subtracted from the remaining game time if the Cannonball collides with the Blocker. The getMissPenalty method (lines 17–19) returns the missPenalty—this method is called from CannonView’s testForCollisions method when subtracting the missPenalty from the remaining time (Section 6.13.11). The Blocker constructor (lines 9–14) passes its arguments and the ID for the blocker-hit sound (CannonView.BLOCKER_SOUND_ID) to the superclass constructor (line 11), then initializes missPenalty.

Fig. 6.8 Blocker subclass of GameElement

Figure 6.8 Full Alternative ...