UnsupportedOperationException异常与自定义布局

Question

我试图使自定义列表视图，将持有的观点自定义对象，在这种情况下，自定义对象将是类的实例Data

这里的Java代码：

import android.app.ListActivity; 
import android.content.Context; 
import android.os.Bundle; 
import android.view.LayoutInflater; 
import android.view.View; 
import android.view.ViewGroup; 
import android.widget.ArrayAdapter; 
import android.widget.TextView; 

public class ListsActivity extends ListActivity { 
    /** Called when the activity is first created. */ 
    @Override 
    public void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.main); 
     Data[] array = new Data[3]; 
     Data p1 = new Data("Person 1", 20); 
     Data p2 = new Data("Person 2", 33); 
     Data p3 = new Data("Person 3", 22); 
     array[0] = p1; 
     array[1] = p2; 
     array[2] = p3; 
     setListAdapter(new MyAdapter(this, R.layout.row, array)); 
    } 

    private class MyAdapter extends ArrayAdapter<Data>{ 

     private Data[] data; 
     public MyAdapter(Context context, int textViewResourceId, 
       Data[] objects) { 
      super(context, textViewResourceId, objects); 
      data = objects; 
     } 

    @Override 
    public View getView(int position, View convertView, ViewGroup parent) { 
     LayoutInflater inflater = (LayoutInflater)getSystemService(Context 
       .LAYOUT_INFLATER_SERVICE); 
     if(convertView == null){ 
      convertView = inflater.inflate(R.layout.row, parent); 
     } 
     TextView text = (TextView) findViewById(R.id.textView1); 
     if(data != null){ 
      text.setText(data[position].getName()); 
     } 
     return convertView; 
    } 

} 

} 

class Data{ 
    private String name; 
    private int age; 

public Data(String name, int age) { 
    this.name = name; 
    this.setAge(age); 
} 
public String getName() { 
    return name; 
} 
public void setName(String name) { 
    this.name = name; 
} 
public int getAge() { 
    return age; 
} 
public void setAge(int age) { 
    this.age = age; 
    } 

} 

和XML文件 row.xml：

<?xml version="1.0" encoding="utf-8"?> 
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    android:layout_width="match_parent" android:layout_height="match_parent" 
    android:orientation="horizontal" android:weightSum="1"> 

    <ImageView android:src="@drawable/icon" android:id="@+id/imageView1" 
     android:layout_height="wrap_content" android:layout_width="wrap_content" /> 

    <TextView android:textAppearance="?android:attr/textAppearanceMedium" 
     android:id="@+id/textView1" android:layout_height="wrap_content" 
     android:text="TextView" android:paddingTop="25dp" 
     android:layout_width="match_parent" /> 

</LinearLayout> 

和main.xml中：

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

    <ListView android:layout_height="wrap_content" android:id="@android:id/list" 
     android:layout_width="match_parent" /> 

</LinearLayout> 

但它抛出UnsupportedOperationException：addView（查看，的LayoutParams）不支持的适配器视图

Answer 1

我解决了它

我通过扩展BaseAdapter，然后调用对象convertView

我的适配器代码遵循的findViewByID方法，万一别人运行创造了自己的适配器进入这个问题

private class MyAdapter extends BaseAdapter{ 

     private List<Data> data; 
     private LayoutInflater inflater; 
     private TextView text; 

     public MyAdapter(Data[] contents){ 
      data = new ArrayList<Data>(); 
      for(Data d : contents){ 
       data.add(d); 
      } 
      inflater = getLayoutInflater(); 

     } 
     @Override 
     public View getView(int position, View convertView, ViewGroup parent) { 
      if(convertView == null){ 
       convertView = inflater.inflate(R.layout.row, null); 
      } 
      if(data != null){ 
       text = (TextView) convertView.findViewById(R.id.textView1); 
       text.setText(data.get(position).getName()); 
      } 
      return convertView; 
     } 


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


     @Override 
     public Object getItem(int arg0) { 
      return data.get(arg0); 
     } 


     @Override 
     public long getItemId(int position) { 
      return data.get(position).hashCode(); 
     } 

    } 
} 

Answer 2

你没有给行号和异常的详细信息，但我的猜测这段代码：

if(convertView == null){ 
    convertView = inflater.inflate(R.layout.row, parent); 
} 

应该成为

if(convertView == null){ 
    // you don't have to append to the parent while inflating in Adapter 
    convertView = inflater.inflate(R.layout.row, null); 
} 

试一下，否则请包括完整的异常，行号POI nting你的代码