動態列表視圖Android

Question

我試圖根據標題，作者或ISBN的搜索查詢製作書籍的動態列表視圖。

我可以顯示一個項目，但無論出於何種原因，我看不到任何與搜索查詢匹配的其他項目。

Main方法

// Set up search array 
    int i = 0; 
    String searchEntries[] = InventoryAdapter.getTitleAndAuthorByISBN(isbn); 
    searchArray.add(new InventoryItem(searchQuery, searchEntries)); 


    // add data in custom adapter 
    adapter = new CustomAdapter(this, R.layout.list, searchArray); 
    ListView dataList = (ListView) findViewById(R.id.list); 
    dataList.setAdapter(adapter); 

CustomAdapter

public class CustomAdapter extends ArrayAdapter<InventoryItem> { 
    Context context; 
    int layoutResourceId; 
    LinearLayout linearMain; 
    ArrayList<InventoryItem> data = new ArrayList<InventoryItem>(); 

    public CustomAdapter(Context context, int layoutResourceId, 
       ArrayList<InventoryItem> data) { 
      super(context, layoutResourceId, data); 
      this.layoutResourceId = layoutResourceId; 
      this.context = context; 
      this.data = data; 
    } 

    @Override 
    public View getView(int position, View convertView, ViewGroup parent) { 
      View row = convertView; 

      if (row == null) { 
       LayoutInflater inflater = ((Activity) context).getLayoutInflater(); 
       row = inflater.inflate(layoutResourceId, parent, false); 

       linearMain = (LinearLayout) row.findViewById(R.id.lineraMain); 

       InventoryItem myItem = data.get(position); 
       for (int j = 0; j < myItem.getDetails().length; j++) { 
         TextView label = new TextView(context); 
         label.setText(myItem.details[j]); 
         linearMain.addView(label); 
       } 
      } 

      return row; 

    } 

} 

InventoryItem

public class InventoryItem { 

    public String query; 
    public String details[]; 

    public InventoryItem(String query, String[] details) { 
      super(); 
      this.query = query; 
      this.details = details; 
    } 
    public String getQuery() { 
      return query; 
    } 
    public void setQuery(String query) { 
      this.query = query; 
    } 
    public String[] getDetails() { 
      return details; 
    } 
    public void setDetails(String[] details) { 
      this.details = details; 
    } 

} 

list.xml

<?xml version="1.0" encoding="utf-8"?> 
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    android:id="@+id/lineraMain" 
    android:layout_width="fill_parent" 
    android:layout_height="fill_parent" 
    android:orientation="vertical" 
    android:padding="10dp" > 

</LinearLayout> 

主要方法XML

<LinearLayout 
      android:layout_width="fill_parent" 
      android:layout_height="0dp" 
      android:layout_weight="95" 
      android:orientation="vertical"> 


      <ScrollView 
        android:layout_width="fill_parent" 
        android:layout_height="fill_parent" 
        android:overScrollMode="always" 
        android:isScrollContainer="true" 
        android:scrollbarAlwaysDrawVerticalTrack="true" 
        android:scrollbarStyle="outsideInset" 
        android:scrollbars="vertical"> 

       <LinearLayout 
         android:layout_width="fill_parent" 
         android:layout_height="wrap_content" 
         android:orientation="vertical" > 

         <ListView 
           android:id="@+id/list" 
           android:layout_width="fill_parent" 
           android:layout_height="fill_parent"> 
         </ListView>  

       </LinearLayout> 

      </ScrollView> 

    </LinearLayout> 

任何想法我做錯了嗎？

Answer 1

您在ScrollView內有ListView。不好的設計不推薦。

http://developer.android.com/reference/android/widget/ScrollView.html

引用文檔

你永遠不應該使用滾動型有一個ListView，因爲ListView控件 需要其自身的垂直滾動的照顧。最重要的是，這樣做 擊敗了ListView中所有重要的優化處理 大列表，因爲它有效地強制ListView顯示 其項目的整個列表來填充由 ScrollView提供的無限容器。

也改變getView到

@Override 
public View getView(int position, View convertView, ViewGroup parent) { 
     View row = convertView; 

     if (row == null) { 
      LayoutInflater inflater = ((Activity) context).getLayoutInflater(); 
      row = inflater.inflate(layoutResourceId, parent, false); 
      linearMain = (LinearLayout) row.findViewById(R.id.lineraMain); 
      } 

      InventoryItem myItem = data.get(position); 
      TextView label = new TextView(context); 
      label.setText(myItem.details[positon]); 
      linearMain.addView(label); 

     return row; 

    } 

編輯：

<?xml version="1.0" encoding="utf-8"?> 
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    android:id="@+id/lineraMain" 
    android:layout_width="fill_parent" 
    android:layout_height="fill_parent" 
    android:orientation="vertical" 
    android:padding="10dp" > 
    <TextView 
     android:id="@+id/tv" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content"/> 

</LinearLayout> 

然後在getView

@Override 
public View getView(int position, View convertView, ViewGroup parent) { 
     ViewHolder holder; 

     if (convertView== null) { 
      LayoutInflater inflater = ((Activity) context).getLayoutInflater(); 
      convertView = inflater.inflate(layoutResourceId, parent, false); 
      holder = ViewHolder(); 
      holder.tv = (TextView) convertView.findViewById(R.id.tv); 
      convertView.setTag(holder); 
     } 
     else 
     { 
      holder = (ViewHolder) convertView.getTag(); 
     } 

      InventoryItem myItem = data.get(position); 
      holder.tv.setText(myItem.details[positon]); 


     return convertView; 

    } 

    static class ViewHolder 
    { 
     TextView tv; 
    }