[英]Android application event handling
Android中是否有一組標准的Listener / Observer / Observable類用於管理Android中的應用程序事件?
我不是在討論UI或其他Android API事件,而是自定義應用程序事件,如GameOverEvent
, LevelClearedEvent
等。
是否有一個首選的接口來實現/擴展,以便我可以實現以下內容:
public void addGameOverListener(GameOverListener listener)
這很簡單,你只需要創建自己的EventListener
public interface onGameFinishedListener {
public void onGameFinished(GameView gameView);
}
和一些有onGameFinished()方法的類
public abstract class GameView extends SurfaceView implements SurfaceHolder.Callback{
List<onGameFinishedListener> listeners;
public GameThread gameThread;
protected int width;
protected int height;
public GameView(Context context) {
super(context);
width = 320;
height = 480;
listeners = new ArrayList<onGameFinishedListener>();
}
public abstract void init();
public void registerGameFinishedListener(onGameFinishedListener listener) {
listeners.add(listener);
}
protected void GameFinished(GameView gameView) {
for (onGameFinishedListener listener : listeners) {
synchronized(gameThread.getSurfaceHolder()) {
listener.onGameFinished(gameView);
}
}
}
}
然后你在活動或視圖中實現onGameFinishedListener,你想在游戲結束時進行操作,
public class RocketActivity extends GameActivity implements onGameFinishedListener {
private final int MENU = 0;
private final int END = 1;
private final int CONFIRMATION = 2;
private RelativeLayout layout;
private RocketView rocketView;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
layout = new RelativeLayout(this);
rocketView = new RocketView(this);
rocketView.registerGameFinishedListener(this);
rocketView.init();
layout.addView(rocketView);
setContentView(layout);
}
@Override
public void onGameFinished(GameView gameView) {
runOnUiThread(new Runnable() {
@Override
public void run() {
showDialog(END);
}
});
}
}
那里。 無需依賴Android for EventListener。 :)
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