根据属性更改背景颜色

Question

我想根据当前光标成员的某些属性来筛选ListItem背景的颜色。我使用SimpleCursorAdapter将数据库的值绑定到ListView。我所做的就是创建一个颜色选择是这样的：

<?xml version="1.0" encoding="utf-8"?> 
<selector xmlns:android="http://schemas.android.com/apk/res/android"> 
    <item android:state_activated="true" android:drawable="@android:color/holo_blue_dark" /> 
    <item android:state_activated="true" android:state_selected="true" android:drawable="@android:color/holo_blue_dark" /> 
    <item android:state_selected="true" android:drawable="@color/rosa" /> 
    <item android:drawable="@android:color/transparent" /> 
</selector> 

我的布局是：

<?xml version="1.0" encoding="utf-8"?> 
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    android:layout_width="fill_parent" android:layout_height="wrap_content" 
    android:orientation="vertical" 
    android:background="@color/listitem_color" > 
    ... 
    ... 

而且我有一个观点粘合剂，我做到以下几点：

mAdapter = new SimpleCursorAdapter(getActivity(), R.layout.listitem, cur, cols, to,0); 
mAdapter.setViewBinder(new ViewBinder() { 
    @Override 
    public boolean setViewValue(View view, Cursor cursor, int columnIndex) { 
     if (columnIndex == 6) { 
      boolean dudoso = cursor.getInt(columnIndex) == 1; 
      TextView textView = (TextView) view; 
      textView.setText(dudoso ? "dudoso" : null); 
      if(dudoso) 
      { 
       LinearLayout ll=((LinearLayout)textView.getParent().getParent()); 
       ll.setSelected(true); 
      } 
      return true; 
     } 
     return false; 
    } 
}); 

但它不起作用。什么是正确的方式来做我想要的？

Answer 1

没有必要采取选择....只是写下 “setBackgroundColor（Color.Blue）” 通过编程UR布局.....`

if(columnIndex == 6) 
{ 
    layout.setBackgroundColor(Color.Blue) 
} 

这里是我的选择XML

<?xml version="1.0" encoding="utf-8"?> 
<selector xmlns:android="http://schemas.android.com/apk/res/android"> 
    <!-- Non focused states --> 
    <item android:state_focused="false" android:state_selected="false" android:state_pressed="false" android:drawable="@drawable/vhclistrowbackground" /> 
    <item android:state_focused="false" android:state_selected="true" android:state_pressed="false" android:drawable="@color/text_tab_unselected" /> 

    <!-- Focused states --> 
    <item android:state_focused="true" android:state_selected="false" android:state_pressed="false" android:drawable="@color/text_tab_selected" /> 
    <item android:state_focused="true" android:state_selected="true" android:state_pressed="false" android:drawable="@color/text_tab_unselected" /> 

    <!-- Pressed --> 
    <item android:state_pressed="true" android:drawable="@color/text_tab_unselected" /> 
</selector> 

Answer 2

也许更好的方法是编写自己的继承自SimpleCursorAdapter的类。类似的东西：

public class BubbleListAdapter extends SimpleCursorAdapter { 

private LayoutInflater mLayoutInflater; 
/** list holding statuses determining if an item is checked/unchecked. */ 
protected List<Boolean> mItemsCheckedStatus; 
/** Cursor. */ 
private Cursor cursor; 
/** reference to ArdoiseDatabaseAdapter. */ 
private MyDatabaseAdapter mMyDatabaseAdapter; 
/** application context. */ 
private Context context; 
/** references to Users. */ 
private Users mUsers; 

/** 
* View holder for color item. 
*/ 
private static class ViewHolder { 
    /** bubble text. */ 
    TextView buubleText; 
    /** user name. */ 
    TextView userName; 
} 

public BubbleListAdapter(Context context, int layout, Cursor cursor, String[] from, int[] to) { 
    super(context, layout, cursor, from, to); 
    this.cursor = cursor; 
    mLayoutInflater = LayoutInflater.from(context); 
    mMyDatabaseAdapter = MyDatabaseAdapter.getInstance(); 
    this.context = context; 
} 

@Override 
public View newView(Context context, Cursor cursor, ViewGroup parent) { 
    View view = mLayoutInflater.inflate(R.layout.bubble_list_item, null); 
    final ViewHolder holder = new ViewHolder(); 
    holder.buubleText = (TextView) view.findViewById(R.id.bubble_list_text); 
    holder.userName = (TextView) view.findViewById(R.id.bubble_list_user_name); 
    view.setTag(holder); 
    return view; 
} 

@Override 
public void bindView(View view, Context context, Cursor cursor) {  
    Cursor c = getCursor(); 
    final ViewHolder holder; 
    if (view != null) { 
     holder = (ViewHolder) view.getTag(); 
     holder.buubleText.setText(c.getString(c.getColumnIndex(BubblesTableMetaData.BUBBLE_TEXT))); 
     if (mUsers != null) { 
      switch (c.getInt(c.getColumnIndex(BubblesTableMetaData.USER_ID))) { 
      case MyConstans.COLOR_RED: 
       holder.buubleText.setBackgroundResource(R.drawable.bubble_red_edit); 
       holder.userName.setTextColor(context.getResources().getColor(R.color.bubble_red)); 
       holder.userName.setText(mUsers.getUser1()); 
       break; 
      case MyConstans.COLOR_BLUE: 
       holder.buubleText.setBackgroundResource(R.drawable.bubble_blue_edit); 
       holder.userName.setTextColor(context.getResources().getColor(R.color.bubble_blue)); 
       holder.userName.setText(mUsers.getUser2()); 
       break; 
      case MyConstans.COLOR_GREEN: 
       holder.buubleText.setBackgroundResource(R.drawable.bubble_green_edit); 
       holder.userName.setTextColor(context.getResources().getColor(R.color.bubble_green)); 
       holder.userName.setText(mUsers.getUser3()); 
       break; 
      case MyConstans.COLOR_VIOLET: 
       holder.buubleText.setBackgroundResource(R.drawable.bubble_violet_edit); 
       holder.userName.setTextColor(context.getResources().getColor(R.color.bubble_violet)); 
       holder.userName.setText(mUsers.getUser4()); 
       break; 
      default: 
       break; 
      } 
     } 
     view.setTag(holder); 
    } 
} 

@Override 
public Object getItem(int position) { 
    Bubble bubble = null; 
    if (cursor != null) { 
     int index = 0; 
     if (cursor.moveToFirst()) { 
      do { 
       if (index == position) { 
        bubble = mArdoiseDatabaseAdapter.mapBubble(context, cursor); 
       } 
       index++; 
      } while (cursor.moveToNext()); 
      return bubble; 
     } 
    } 
    return bubble; 
} 

/** 
* Get users. 
* 
* @return the mUsers 
*/ 
public Users getmUsers() { 
    return mUsers; 
} 

/** 
* Set users. 
* 
* @param mUsers 
*   the mUsers to set 
*/ 
public void setmUsers(Users mUsers) { 
    this.mUsers = mUsers; 
} 

@Override 
public int getCount() { 
    return cursor.getCount(); 
} 
} 

我希望有所帮助。

Answer 3

我不太清楚，但你可以尝试：

if (columnIndex == 6) { 
     boolean dudoso = cursor.getInt(columnIndex) == 1; 
     TextView textView = (TextView) view; 
     textView.setText(dudoso ? "dudoso" : null); 
     if(dudoso) 
     { 
      v.setSelected(true); 

     } 
     return true; 
    }