本文實(shí)例講述了Android編程實(shí)現(xiàn)下載時(shí)主界面與詳細(xì)界面一致更新的方法。分享給大家供大家參考，具體如下：
1、創(chuàng)建監(jiān)聽管理類
public class ObserverManager { private List<Observer> observers = new ArrayList<ObserverManager.Observer>(); public interface Observer { public void update(); public void updateState(); } public void addObserver(Observer observer) { if (observer == null) { throw new RuntimeException(); } synchronized (this) { if (!observers.contains(observer)) { observers.add(observer); } } } public void notifyObservers() { for (Observer observer : observers) { observer.update(); } } public void notifyState() { for (Observer observer : observers) { observer.updateState(); } }}2、創(chuàng)建詳細(xì)界面
public class DetailView extends View implements Observer { public DetailView(Context context, AttributeSet attrs, int defStyleAttr) { super(context, attrs, defStyleAttr); } public DetailView(Context context, AttributeSet attrs) { super(context, attrs); } public DetailView(Context context) { super(context); } @Override public void update() { System.out.println("update"); } @Override public void updateState() { System.out.println("updateState"); }}3、創(chuàng)建主界面
1)在初始化時(shí)添加監(jiān)聽
mObserverManager.addObserver(new DetailView(this));
2)在主界面點(diǎn)擊下載時(shí)通知詳細(xì)界面更新
public class MainActivity extends Activity { private ObserverManager mObserverManager; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); mObserverManager = new ObserverManager(); mObserverManager.addObserver(new DetailView(this)); } public void click(View v) { //TODO 比如開始下載 mObserverManager.notifyUpdate();// }}希望本文所述對(duì)大家Android程序設(shè)計(jì)有所幫助。
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