Android的 - 充气的ListView [英] Android - Inflating ListView
问题描述
我想填充列表视图,其中每行有2 textviews和一个按钮。我想,我几乎有它正常工作,但现在ListView控件只显示在ListView 1项,而忽略其他数据。我也有2 XML文件(shelfrow.xml(2文本框,1个按钮)和shelflist.xml(包括列表视图))。
这里是我Shelf.java类的核心code。 (MyListItemModel是一类用于存储每本书)
列表< MyItemModel> myListModel =新的ArrayList< MyItemModel>();
尝试{
JSONArray项= json.getJSONArray(项目);
的for(int i = 0; I< entries.length();我++){
MyItemModel项目=新MyItemModel();
JSONObject的E = entries.getJSONObject(I)
alKey.add(e.getInt(钥匙));
item.id = I;
item.title = e.getString(标题);
item.description = e.getString(说明); myListModel.add(项目);
}}赶上(JSONException E){
Log.e(log_tag,错误分析数据+ e.toString());
}
//这是我认为这个问题 - 错误:在类型LayoutInflater的方法在inflate(INT,ViewGroup中)不适用的参数(INT,货架)
MyListAdapter适配器=新MyListAdapter(getLayoutInflater()膨胀(R.layout.shelfrow,这一点)。);adapter.setModel(myListModel);
setListAdapter(适配器);
LV = getListView();
lv.setTextFilterEnabled(真);
和一些code在我的课MyListAdapter
@覆盖
公共查看getView(INT位置,查看convertView,父母的ViewGroup){ 如果(convertView == NULL){
convertView =渲染器; }
MyListItemModel项目= items.get(位置);
//通过您的自定义布局LIST_ITEM里面的那些取代那些R.ids。
TextView的标签=(TextView中)convertView.findViewById(R.id.item_title);
label.setText(item.getTitle());
TextView的LABEL2 =(TextView中)convertView.findViewById(R.id.item_subtitle);
label2.setText(item.getDescription());
Button按钮=(按钮)convertView.findViewById(R.id.btn_download);
button.setOnClickListener(item.listener);
//}
返回convertView;
}
这是因为你吹大查看
当你创建适配器
。因为你只创建适配器
一次,你只吹有一个查看
。 A 查看
需要被夸大了你的 ListView的每一可见行
。
而不是传递充气查看
来的构造 MyListAdapter
:
MyListAdapter适配器=新MyListAdapter(getLayoutInflater()膨胀(R.layout.shelfrow,这一点)。);...@覆盖
公共查看getView(INT位置,查看convertView,父母的ViewGroup){ 如果(convertView == NULL){
convertView =渲染器;
}
...
}
你的是:
//删除您创建了一个需要查看的构造。
MyListAdapter适配器=新MyListAdapter();...@覆盖
公共查看getView(INT位置,查看convertView,父母的ViewGroup){ 如果(convertView == NULL){
//充气一个新的查看每一个新行需要一次。
convertView = LayoutInflater.from(上下文).inflate(R.layout.shelfrow,父母,假);
}
...
}
I am trying to populate a listview where each row has 2 textviews and a button. I think I nearly have it working properly but right now the ListView only shows 1 item in the ListView and ignores the other data. I also have 2 xml files (shelfrow.xml (2 textfields, 1 button) and shelflist.xml(contains the listview)). Here is the core code of my Shelf.java class. (MyListItemModel is a class for storing each book)
List<MyItemModel> myListModel = new ArrayList<MyItemModel>();
try{
JSONArray entries = json.getJSONArray("entries");
for(int i=0;i<entries.length();i++){
MyItemModel item = new MyItemModel();
JSONObject e = entries.getJSONObject(i);
alKey.add(e.getInt("key"));
item.id = i;
item.title = e.getString("title");
item.description = e.getString("description");
myListModel.add(item);
}
}catch(JSONException e) {
Log.e("log_tag", "Error parsing data "+e.toString());
}
//THIS IS THE PROBLEM I THINK - ERROR: The method inflate(int, ViewGroup) in the type LayoutInflater is not applicable for the arguments (int,Shelf)
MyListAdapter adapter = new MyListAdapter(getLayoutInflater().inflate(R.layout.shelfrow,this));
adapter.setModel(myListModel);
setListAdapter(adapter);
lv = getListView();
lv.setTextFilterEnabled(true);
and some of the code in my class MyListAdapter
@Override
public View getView(int position, View convertView, ViewGroup parent) {
if(convertView==null){
convertView = renderer;
}
MyListItemModel item = items.get(position);
// replace those R.ids by the ones inside your custom list_item layout.
TextView label = (TextView)convertView.findViewById(R.id.item_title);
label.setText(item.getTitle());
TextView label2 = (TextView)convertView.findViewById(R.id.item_subtitle);
label2.setText(item.getDescription());
Button button = (Button)convertView.findViewById(R.id.btn_download);
button.setOnClickListener(item.listener);
//}
return convertView;
}
It is because you inflate the View
when you create the Adapter
. Since you only create the Adapter
once, you only inflate one View
. A View
needs to be inflated for every visible row in your ListView
.
Instead of passing the inflated View
to the constructor of MyListAdapter
:
MyListAdapter adapter = new MyListAdapter(getLayoutInflater().inflate(R.layout.shelfrow,this));
...
@Override
public View getView(int position, View convertView, ViewGroup parent) {
if(convertView == null) {
convertView = renderer;
}
...
}
Thy this:
// Remove the constructor you created that takes a View.
MyListAdapter adapter = new MyListAdapter();
...
@Override
public View getView(int position, View convertView, ViewGroup parent) {
if(convertView == null) {
// Inflate a new View every time a new row requires one.
convertView = LayoutInflater.from(context).inflate(R.layout.shelfrow, parent, false);
}
...
}
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