在ListView中自定义行与自定义适配器 [英] Custom rows in ListView with custom Adapter

问题描述

我做了以下适配器，我以前用来创建属于同一所有的时间行。我删除了textviews和imageviews的创建。

我想实现的是创造取决于键不同的行。
一排可以包含文本和图像，而另一行只有文字。我怎么能这样做呢？

 公共类DetailsListAdapter扩展ArrayAdapter＆LT; ArrayList的＆LT;串GT;＆GT; {
    私人上下文的背景下;
    私人的ArrayList＆LT;串GT;键;    公共DetailsListAdapter（上下文的背景下，ArrayList的＆LT;串GT;键）{
        超（背景下，R.layout.details）;
        this.context =背景;
        this.keys =键;
    }    @覆盖
    公共查看getView（INT位置，查看convertView，父母的ViewGroup）{
        LayoutInflater吹气=（LayoutInflater）context.getSystemService（Context.LAYOUT_INFLATER_SERVICE）;
        视图V = inflater.inflate（R.layout.details，NULL）;
        返回伏;
    }    @覆盖
    公众诠释的getCount（）{
        返回keys.size（）;
    }
}
 

解决方案

要为你需要重写行膨胀不同的布局 getViewItemType 和 getViewTypeCount 。

您应该看看在链接的视频。

http://www.youtube.com/watch?v=wDBM6wVEO70

 私有静态最终诠释TYPE_ITEM1 = 0;
私有静态最终诠释TYPE_ITEM2 = 1;
私有静态最终诠释TYPE_ITEM3 = 2;
 

然后

  int型的;
@覆盖
公众诠释getItemViewType（INT位置）{    如果（位置== 0）{
        键入= TYPE_ITEM1;
    }否则如果（位置== 1）{
        键入= TYPE_ITEM2;
    }
    其他
    {
         键入= TYPE_ITEM3;
    }
    返回类型;
} @覆盖
 公众诠释getViewTypeCount（）{
        返回3;
 }
@覆盖
公共查看getView（INT位置，查看convertView，父母的ViewGroup）{
查看排= convertView;
LayoutInflater吹气= NULL;
整型= getItemViewType（位置）;
  //而不是其他，如果你可以使用情况
   如果（convertView == NULL）{
    如果（类型== {TYPE_ITEM1
            // TYPE1的infalte布局
           convertView = mInflater.inflate（R.layout.layouttype1，
                         父母，假）;
      }
    如果（类型== TYPE_ITEM2）{
            // TYPE2的infalte布局
           convertView = mInflater.inflate（R.layout.layouttype2，
                         父母，假）;
    }其他{
            // normaltype的infalte布局
            convertView = mInflater.inflate（R.layout.layouttype3，
                         父母，假）;
 }
 ... //在code休息
    返回convertView;
}
 

I made the following adapter which I used before to create rows that are the same all the time. I removed the creation of the textviews and imageviews.

What I want to achieve is to create different rows depending on the key. A row could contain text and an image while another row only has text. How would I be able to do that?

public class DetailsListAdapter extends ArrayAdapter<ArrayList<String>> {
    private Context context;
    private ArrayList<String> keys;

    public DetailsListAdapter(Context context, ArrayList<String> keys) {
        super(context,R.layout.details); 
        this.context = context;
        this.keys = keys;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        View v = inflater.inflate(R.layout.details, null);      
        return v;
    }

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

解决方案

To inflate different layout for rows you need to override getViewItemType and getViewTypeCount.

You should have a look at the video in the link.

http://www.youtube.com/watch?v=wDBM6wVEO70

private static final int TYPE_ITEM1 = 0;
private static final int TYPE_ITEM2 = 1;
private static final int TYPE_ITEM3 = 2; 

Then

int type;
@Override
public int getItemViewType(int position) {

    if (position== 0){
        type = TYPE_ITEM1;
    } else if  (position == 1){
        type = TYPE_ITEM2;
    }
    else
    {
         type= TYPE_ITEM3 ;
    }
    return type;
}

 @Override
 public int getViewTypeCount() {
        return 3; 
 }
@Override  
public View getView(int position, View convertView, ViewGroup parent) {
View row = convertView;
LayoutInflater inflater = null;
int type = getItemViewType(position);
  // instead of if else you can use a case
   if (convertView == null) {
    if (type == TYPE_ITEM1 {
            //infalte layout of type1
           convertView = mInflater.inflate(R.layout.layouttype1, 
                         parent, false);
      }
    if (type == TYPE_ITEM2) {
            //infalte layout of type2
           convertView = mInflater.inflate(R.layout.layouttype2, 
                         parent, false);
    }  else {
            //infalte layout of normaltype
            convertView = mInflater.inflate(R.layout.layouttype3, 
                         parent, false);
 }
 ...// rest of the code
    return convertView;
} 

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