问题描述
我绑定的XML文档,以自定义适配器。所有的在列表中的项目最初具有的白色字体颜色。一个XML文档中的节点都有,我检查,如果该属性设置,我想改变该项目的字体颜色在ListView到较深的颜色属性。在code我似乎工作开始,但如果我滚动列表向上和向下,在ListView中的项目应保持白色,以深色自动改变,由于某些原因:
下面是我的布局code:
< LinearLayout中的xmlns:机器人=http://schemas.android.com/apk/res/android
机器人:layout_width =FILL_PARENT
机器人:layout_height =FILL_PARENT
机器人:方向=垂直>
< TextView中的xmlns:机器人=http://schemas.android.com/apk/res/android
机器人:ID =@ + ID /文
机器人:layout_width =FILL_PARENT
机器人:layout_height =FILL_PARENT
机器人:TEXTSIZE =15dip
机器人:文字颜色=#FFFFFF
机器人:TEXTSTYLE =黑体
机器人:填充=5像素
/>
< / LinearLayout中>
和这里是我的自定义适配器:
私有类CustomAdapter扩展了BaseAdapter
{
私人的ArrayList<的FilterItem> MDATA =新的ArrayList<的FilterItem>();
私人LayoutInflater mInflater;
公共CustomAdapter(){
mInflater =(LayoutInflater)getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
公共无效的addItem(的FilterItem项目){
mData.add(项目);
}
@覆盖
公众诠释getCount将(){
返回mData.size();
}
@覆盖
公共对象的getItem(INT位置){
返回mData.get(位置);
}
@覆盖
众长getItemId(INT位置){
返回的位置;
}
@覆盖
公共查看getView(INT位置,查看convertView,父母的ViewGroup)
{
ViewHolder持有人;
的FilterItem项目=(的FilterItem)this.getItem(位置);
如果(convertView == NULL)
{
持有人=新ViewHolder();
convertView = mInflater.inflate(R.layout.main,NULL);
holder.text =(TextView中)convertView.findViewById(R.id.text);
convertView.setTag(保持器);
} 其他 {
支架=(ViewHolder)convertView.getTag();
}
TextView的tvText = holder.text;
tvText.setText(item.getTitle());
如果(item.Read())
{
tv.setTextColor(Color.Gray);
}
返程(convertView);
}
}
ListView控件重用视图,因为你可以在 getView
看你convertView,你只能从改变颜色白色至灰色。你永远不回恢复颜色为白色。我建议
如果(item.Read()){
tv.setTextColor(Color.Gray);
} 其他 {
tv.setTextColor(Color.White);
}
I am binding an XML document to a custom adapter. All of the items in the list initially have a font color of white. One of the nodes in the XML document has an attribute that I am checking and if the attribute is set, I'd like to change the font color of that item in the ListView to a darker color. The code I have seems to work initially, but if I scroll the list up and down, the items in the ListView that should stay white, change automatically to the dark color, for some reason:
Here is my layout code:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical">
<TextView xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/text"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:textSize="15dip"
android:textColor="#ffffff"
android:textStyle="bold"
android:padding="5px"
/>
</LinearLayout>
and here is my custom adapter:
private class CustomAdapter extends BaseAdapter
{
private ArrayList<FilterItem> mData = new ArrayList<FilterItem>();
private LayoutInflater mInflater;
public CustomAdapter() {
mInflater = (LayoutInflater)getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
public void addItem(FilterItem item) {
mData.add(item);
}
@Override
public int getCount() {
return mData.size();
}
@Override
public Object getItem(int position) {
return mData.get(position);
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public View getView(int position, View convertView, ViewGroup parent)
{
ViewHolder holder;
FilterItem item = (FilterItem)this.getItem(position);
if (convertView == null)
{
holder = new ViewHolder();
convertView = mInflater.inflate(R.layout.main, null);
holder.text = (TextView)convertView.findViewById(R.id.text);
convertView.setTag(holder);
} else {
holder = (ViewHolder)convertView.getTag();
}
TextView tvText = holder.text;
tvText.setText(item.getTitle());
if (item.Read())
{
tv.setTextColor(Color.Gray);
}
return(convertView);
}
}
ListView reuses view, as you can see in getView
you get convertView, and you only change color from white to gray. You never restore color back to white. I suggest
if (item.Read()) {
tv.setTextColor(Color.Gray);
} else {
tv.setTextColor(Color.White);
}
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