我可以为ListView中的单个项目设置不同的边框吗？

Question

我有一个自定义的ListView适配器，根据一些规则更改列表项的背景颜色。

这主要是工作。

在1场景中，我想在同一个listitem中表示2种颜色。我认为我可以通过设置边框的边框厚度和颜色来做到这一点，但我无法让它工作。

有人可以告诉我，如果可以这样做，如果是的话如何。另外，如果有另一种方式来显示同一个listitem中的两种颜色（比如说一种颜色渐变为另一种颜色），那么我会对另一种实现感到满意。

下面是代码：

public class SpecialAdapter extends SimpleAdapter { 
public ArrayList<String> listColours=new ArrayList<String>(); 
ArrayList<String> listItems=new ArrayList<String>(); 

public static final String LOGid = "TouchAndGo"; 

public SpecialAdapter(Context context, List<HashMap<String, String>> items, int resource, String[] from, int[] to) { 
    super(context, items, resource, from, to); 
} 

public SpecialAdapter(WWFoodFinderActivity context, 
     List<Map<String, String>> data, int simpleListItem2, String[] from, 
     int[] to) { 
    super(context, data, simpleListItem2, from,to); 
} 

@Override 
public View getView(int position, View convertView, ViewGroup parent) { 
    View view = null; 
    try 
    { 
     view = super.getView(position, convertView, parent); 
     Log.d(LOGid, "Position:" + position + "Value:" + listColours.get(position) + "Line:" + listItems.get(position)); 
    } 
    catch (Exception e) 
    { 
     Log.e(LOGid, "Failed to get handle on view " + e.getMessage()); 
    } 

    /* This never works - cannot get a handle on the thisview this way :(*/ 
    ListView lv = null; 
    try 
    { 
     lv = (ListView) view; 
    } 
    catch (Exception e) 
    { 
     Log.e(LOGid, "Failed to get handle on Listview " + e.getMessage()); 
    } 

    try 
    { 

     if (listColours.get(position).equals("Y")) 
     { 
      Log.d(LOGid, "View set to green with green border"); 
      view.setBackgroundColor (android.graphics.Color.rgb(40, 150, 40)); 
      lv.setDividerHeight(2); 
      ColorDrawable green = new ColorDrawable(android.graphics.Color.rgb(40, 150, 40)); 
      lv.setDivider(green); 

     } 
     else if (listColours.get(position).equals("C")) 
     { 
      Log.d(LOGid, "View set to blue with blue border"); 
      view.setBackgroundColor (android.graphics.Color.rgb(40, 40, 150)); 
      lv.setDividerHeight(2); 
      ColorDrawable blue = new  ColorDrawable(android.graphics.Color.rgb(40, 40, 150)); 
      lv.setDivider(blue); 

     } 
     /* This is the exception case, need to represent 2 colours in the same listitem */ 
     else if (listColours.get(position).equals("Y/C")) 
     { 
      Log.d(LOGid, "View set to green with blue border"); 
      view.setBackgroundColor (android.graphics.Color.rgb(40, 150, 40)); 
      lv.setDividerHeight(2); 
      ColorDrawable blue = new  ColorDrawable(android.graphics.Color.rgb(40, 150, 40)); 
      lv.setDivider(blue); 
      //lv.setDivider(); 
//  Log.d(LOGid, "View set to green"); 
     } 

     else 
     { 
      Log.d(LOGid, "View set to black with black"); 
      view.setBackgroundColor (android.graphics.Color.BLACK); 
      lv.setDividerHeight(2); 
      ColorDrawable black = new  ColorDrawable(android.graphics.Color.rgb(0, 0, 0)); 
      lv.setDivider(black); 

     } 
    } 
    catch (Exception e) 
    { 
     Log.e(LOGid, "Error rendering list item: " + e.getMessage()); 
    } 
/* int colorPos = position % colors.length; 
    view.setBackgroundColor(colors[colorPos]); */ 
    return view; 
} 
} 

最后一步我是，我想单独设置边框几个ListItem。使用BaseAdapter然后在getView功能

Answer 1

尝试：

public View getView(int position, View convertView, ViewGroup parent) 
{ 
View view = inflater.inflate(R.layout.yourlayout, null);   
try 
    { 

     if (listColours.get(position).equals("Y")) 
     { 
      view.setBackgroundColor (android.graphics.Color.rgb(40, 150, 40)); 
      ColorDrawable green = new ColorDrawable(android.graphics.Color.rgb(40, 150, 40)); 
     } 
     else if (listColours.get(position).equals("C")) 
      view.setBackgroundColor (android.graphics.Color.rgb(40, 40, 150)); 
      ColorDrawable blue = new  ColorDrawable(android.graphics.Color.rgb(40, 40, 150)); 
     } 
     else if (listColours.get(position).equals("Y/C")) 
     { 
      view.setBackgroundColor (android.graphics.Color.rgb(40, 150, 40)); 
      ColorDrawable blue = new  ColorDrawable(android.graphics.Color.rgb(40, 150, 40)); 
     } 

     else 
     { 
      view.setBackgroundColor (android.graphics.Color.BLACK); 
      ColorDrawable black = new  ColorDrawable(android.graphics.Color.rgb(0, 0, 0)); 
     } 
    } 
    catch (Exception e) 
    { 
     Log.e(LOGid, "Error rendering list item: " + e.getMessage()); 
    } 

return view; 
} 

设置布局与自己分隔的项目，在这里改变自己的颜色。不要忘记从ListView中删除分隔符。