如何初始化ListView中的某些行项目？

Question

我使用来自SQLite数据库的数据填充ListView，然后使用SimpleAdapter来显示它。每行的一个字段是String，它指的是一种颜色。我想根据那个String设置每一行的背景颜色。我怎样才能做到这一点？

编辑：我添加的代码我用我的数据附加到ListView：

listView_commentaires = (ListView) findViewById(R.id.liste_favoris); 
        daofavoris = new DAOFavoris(FavorisActivity.this); 
        daofavoris.open(); 
        List<Commentaire> response = new ArrayList<Commentaire>(); 
        response = daofavoris.getAllFavoris(); 
        try { 
            favoris = new ArrayList<HashMap<String, Object>>(); 
            for (Commentaire commentaire : response) { 
                HashMap<String, Object> element; 
                element = new HashMap<String, Object>() 
                byte[] miniature = commentaire.decodeMiniature(); 
                Bitmap bitmap = BitmapFactory.decodeByteArray(miniature, 0, miniature.length); 
                element.put("BITMAP", bitmap); 
                element.put("CONTENT", commentaire.getContent()); 
                element.put("AUTHOR", commentaire.getAuthor()); 
                element.put("DATE", Constantes.getRealDate(commentaire.getDate())); 
                favoris.add(element); 
            } 
            simpleAdapter = new SimpleAdapter(FavorisActivity.this, 
                    favoris, R.layout.favoris_liste, new String[] { 
                            "BITMAP", "CONTENT", "AUTHOR", "DATE" }, 
                    new int[] { R.id.media_favoris, 
                            R.id.favoris_content, 
                            R.id.favoris_author, 
                            R.id.favoris_timestamp }); 
            simpleAdapter.setViewBinder(new SimpleAdapter.ViewBinder() { 
                @Override 
                public boolean setViewValue(View view, Object data, 
                        String textRepresentation) { 
                    if ((view instanceof ImageView) 
                            & (data instanceof Bitmap)) { 
                        ImageView iv = (ImageView) view; 
                        Bitmap bm = (Bitmap) data; 
                        iv.setImageBitmap(bm); 
                        return true; 
                    } 
                    return false; 
                } 
            }); 
            listView_commentaires.setAdapter(simpleAdapter); 

Answer 1

而不是使用SimpleAdapter，你可以使用一个SimpleCursorAdapter这样的：

SimpleCursorAdapter adapter = 
    new SimpleCursorAdapter(
     getActivity(), 
     R.layout.yourLayout, 
     yourCursor, 
     new String[] { 
     YourColumnName 
     }, 
     new int[]{ 
     R.id.your_root_layout_element 
     }, 0 
    ); 

    adapter.setViewBinder(
    new SimpleCursorAdapter.ViewBinder() { 
     @Override 
     public boolean setViewValue(View view, Cursor cursor, int columnIndex) { 
     LinearLayout rootLayout = (LinearLayout) view; 
     setBackgroundColor(
      Color.parseColor(
      cursor.getString(0))); 
     return true; 
     } 

    }); 

其中：

• R.layout.yourLayout是您用于ListView的每一行的布局资源;
• yourCursor是包含从数据库接收到的数据的Cursor;
• yourColumnName就是你有颜色的列名的String表示;
• R.id.your_root_layout_element是分配给您的布局的根元素的ID。在这个例子中，我假设它是一个LinearLayout;
• Color.parseColor(cursor.getString(0))从String生成的颜色标识符取自数据库。

之后，你有这个SimpleCursorAdapter分配给您的ListView如下：listView.setAdapter(adapter);。

我希望这对你有所帮助。

Answer 2

内部适配器类把这个代码：

convertView.setBackgroundColor(mContext.getResources().getColor(R.color.message_selector_holo_blue)); 

根据condtion改变行的颜色