如何處理ButtonField和BitmapField在Blackberry Storm中單擊（觸摸）事件？

Question

我創建了一個ButtonField字段&一個BitmapField如..

public class MyCanvas extends MainScreen implements FieldChangeListener 
    { 
    HorizontalFieldManager hfm; 
    private Bitmap startBitmap; 
    private BitmapField startBitmapField; 
    private ButtonField okButton; 

    MyCanvas() 
    { 
    hfm = new HorizontalFIeldManager(); 
    startBitmap = Bitmap.getBitmapResource("start.png"); 
    startBitmapField = new BitmapField(startBitmap); 
    startBitmapField.setChangeListener(this); 
    hfm.add(startBitmapField); 

    okButton = new ButtonField("Ok", ButtonField.CONSUME_CLICK | ButtonField.NEVER_DIRTY); 
    okButton.setChangeListener(this); 
    hfm.add(okButton); 
    } 

    public void fieldChanged(Field field, int context) 
    { 
    if(field == startBitmapField) 
    { 
     System.out.println("Touched START..."); 
    } 
    else if(field == okButton) 
    { 
     System.out.println("Touched Ok..."); 
    } 
    } 
} 

但ButtonField字段或BitmapField點擊也不會在黑莓4.7模擬器發生。

我想建立它的黑莓風暴所以我米使用黑莓4.7

如何處理點擊/觸摸查詢ButtonField字段&事件BitmapField黑莓風暴？

---

我米作爲

okButtonField = new ButtonField("Ok", BitmapField.HIGHLIGHT_SELECT | BitmapField.FOCUSABLE); 

startBitmapField = new BitmapField(startBitmap, BitmapField.HIGHLIGHT_SELECT | BitmapField.FOCUSABLE); 

及其創建ButtonField字段& BitmapFields有工作..

protected boolean touchEvent(TouchEvent event) 
{ 
    switch(event.getEvent() ) 
    { 
    case TouchEvent.DOWN: ........ 
      return true; 
    case TouchEvent.MOVE: ....... 
          return true; 
    case TouchEvent.UP: ........ 
          return true; 

    case TouchEvent.CLICK: 
     if(deleteButton.isFocus()) 
     {    
     System.out.println("Touched DEL .........."); 
     } 
     else if(okButton.isFocus()) 
     {    
     System.out.println("Touched OK .........."); 
     } 
     else if(startBitmapField.isFocus()) 
     {    
     System.out.println("Touched START .........."); 
     }   
    return true; 
    } 
    return false; 
} 

但每次相同的按鈕被調用，其具有焦點。

意思是如果「確定」按鈕有焦點，即使你點擊了「刪除」按鈕「確定」按鈕被調用。

那麼如何改變按鈕點擊的重點？意味着點擊ButtonField或BitmapField的任何應該獲得焦點？

是否有任何方法檢查「button.isClicked（）像button.isFocus（）」？

Answer 1

首先，不要忘了添加hfm到屏幕;）
實際上按鈕單擊工作正常。
現在，爲了使位圖點擊也可以工作，爲您的BitmapField實現受保護的布爾touchEvent（TouchEvent消息）。創建擴展類將會更好：

class MyCanvas extends MainScreen implements FieldChangeListener { 
    HorizontalFieldManager hfm; 
    private Bitmap startBitmap; 
    private BitmapField startBitmapField; 
    private ButtonField okButton; 
    private ButtonField cancelButton; 

    MyCanvas() { 
     hfm = new HorizontalFieldManager(); 
     add(hfm); 

     startBitmap = Bitmap.getBitmapResource("start.png"); 
     startBitmapField = new TouchBitmapField(startBitmap); 
     startBitmapField.setChangeListener(this); 
     hfm.add(startBitmapField); 

     okButton = new ButtonField("Ok", ButtonField.CONSUME_CLICK 
       | ButtonField.NEVER_DIRTY); 
     okButton.setChangeListener(this); 
     hfm.add(okButton); 

     cancelButton = new ButtonField("Cancel", ButtonField.CONSUME_CLICK 
       | ButtonField.NEVER_DIRTY); 
     cancelButton.setChangeListener(this); 
     hfm.add(cancelButton); 
    } 

    public void fieldChanged(Field field, int context) { 
     if (field == startBitmapField) { 
      System.out.println("Touched START..."); 
     } else if (field == okButton) { 
      System.out.println("Touched Ok..."); 
     } else if (field == cancelButton) { 
      System.out.println("Touched Cancel..."); 
     } 
    } 
} 

class TouchBitmapField extends BitmapField { 
    public TouchBitmapField(Bitmap startBitmap) { 
     super(startBitmap); 
    } 

    protected boolean touchEvent(TouchEvent message) { 
     if (TouchEvent.CLICK == message.getEvent()) { 
      FieldChangeListener listener = getChangeListener(); 
      if (null != listener) 
       listener.fieldChanged(this, 1); 
     } 
     return super.touchEvent(message); 
    } 
}