如何檢查blackberry listfield中的onchildclick？

Question

這是我的自定義列表字段。

public class Custom_ListField extends ListField implements ListFieldCallback { 
private Vector rows; 
private LabelField titletext, datetext, categorytext; 
private Bitmap bg = Bitmap.getBitmapResource("list_bar.png"); 

public Custom_ListField(String title[], String date[], String category[]) { 
    super(0, ListField.MULTI_SELECT); 
    setRowHeight(80); 
    setCallback(this); 
    Background background = BackgroundFactory.createBitmapBackground(bg); 
    setBackground(background); 

    rows = new Vector(); 

    for (int x = 0; x < title.length; x++) { 
     TableRowManager row = new TableRowManager(); 

     titletext = new LabelField(title[x], DrawStyle.ELLIPSIS 
       | LabelField.USE_ALL_WIDTH | DrawStyle.LEFT); 
     titletext.setFont(Font.getDefault().derive(Font.BOLD, 20)); 

     row.add(titletext); 

     datetext = new LabelField(date[x], DrawStyle.ELLIPSIS 
       | LabelField.USE_ALL_WIDTH | DrawStyle.LEFT); 
     datetext.setFont(Font.getDefault().derive(Font.BOLD, 15)); 
     row.add(datetext); 

     categorytext = new LabelField(category[x], DrawStyle.ELLIPSIS 
       | LabelField.USE_ALL_WIDTH); 
     //categorytext.setMargin(0, 0, 0, 100); 
     categorytext.setFont(Font.getDefault().derive(Font.BOLD, 15)); 
     row.add(categorytext); 
     rows.addElement(row); 
    } 
    setSize(rows.size()); 
} 

public void drawListRow(ListField listField, Graphics g, int index, int y, 
     int width) { 
    Custom_ListField list = (Custom_ListField) listField; 
    TableRowManager rowManager = (TableRowManager) list.rows 
      .elementAt(index); 
    rowManager.drawRow(g, 0, y, width, list.getRowHeight()); 
} 

private class TableRowManager extends Manager { 
    public TableRowManager() { 
     super(0); 
    } 

    public void drawRow(Graphics g, int x, int y, int width, int height) { 
     layout(width, height); 

     setPosition(x, y); 
     g.pushRegion(getExtent()); 
     subpaint(g); 
     g.popContext(); 
    } 

    protected void sublayout(int width, int height) { 
     int fontHeight = Font.getDefault().getHeight(); 
     int preferredWidth = getPreferredWidth(); 

     Field field = getField(0); 
     layoutChild(field, preferredWidth - 16, fontHeight + 1); 
     setPositionChild(field, 5, 5); 

     field = getField(1); 
     layoutChild(field, 150, fontHeight); 
     setPositionChild(field, 5, fontHeight + 5); 

     field = getField(2); 
     layoutChild(field, 150, fontHeight); 
     setPositionChild(field, preferredWidth - 155, fontHeight + 5); 

     setExtent(preferredWidth, getPreferredHeight()); 
    } 

    public int getPreferredWidth() { 
     return Graphics.getScreenWidth(); 
    } 

    public int getPreferredHeight() { 
     return getRowHeight(); 
    } 
} 

public Object get(ListField listField, int index) { 
    return null; 
} 

public int getPreferredWidth(ListField listField) { 
    return 0; 
} 

public int indexOfList(ListField listField, String prefix, int start) { 
    return 0; 
} 
} 

哪裏設置，如果點擊然後push screen？

Answer 1

爲此，您應該覆蓋navigationClick(int status, int time)。然後在裏面，通過listField.getSelectedIndex（）獲取選定的項目索引，並做任何你需要的東西。