UnsupportedOperationException

Question

我做了listview從sd卡加載了很多東西，並在Listview中顯示。現在我試圖使自定義列表視圖適配器以使該列表視圖更好看，但我得到這個錯誤每次02-22 20:54:21.411: E/AndroidRuntime(17273): java.lang.UnsupportedOperationException: addView(View, LayoutParams) is not supported in AdapterView 這裏是我的Java代碼：

musiclist = (ListView) findViewById(R.id.PhoneMusicList); 
      musiclist.setAdapter(new MusicAdapter(getApplicationContext(), count, null)); 

    public class MusicAdapter extends BaseAdapter { 
      private Context mContext; 
      Context context; 
     int layoutResourceId;  
     ListView data[] = null; 
      public MusicAdapter(Context context, int layoutResourceId, ListView data[]){ 
       super(); 
       mContext = context; 

       this.layoutResourceId = layoutResourceId; 
       this.context = context; 
       this.data = data; 
      } 

      public int getCount() { 
       return count; 
      } 

      public Object getItem(int position) { 
       return position; 
      } 

      public long getItemId(int position) { 
       return position; 
      } 


      public View getView(int position, View convertView, ViewGroup parent) { 
       View row = convertView; 
       ListViewHolder holder = null ; 

       String id = null; 
       if(row == null) 
      { 
        LayoutInflater inflater = getLayoutInflater(); 
       row = inflater.inflate(R.layout.listview_item_row, parent); 
      holder = new ListViewHolder(); 
         music_column_index = musiccursor 
.getColumnIndexOrThrow(MediaStore.Audio.Media.DISPLAY_NAME); 
         musiccursor.moveToPosition(position); 
         id = musiccursor.getString(music_column_index); 
         music_column_index = musiccursor 
.getColumnIndexOrThrow(MediaStore.Audio.Media.SIZE); 
         musiccursor.moveToPosition(position); 
         id += musiccursor.getString(music_column_index); 
         row.setTag(holder); 
         holder.txtTitle.setText(id); 
         holder.imgIcon.setImageResource(R.drawable.music); 
         holder.imgIcon = (ImageView)row.findViewById(R.id.imgIcon); 
        holder.txtTitle = (TextView)row.findViewById(R.id.txtTitle); 
       } else { 
         holder = (ListViewHolder)row.getTag(); 
       } 
       holder.txtTitle.setText(id); 
       holder.imgIcon.setImageResource(R.drawable.music); 
       return row; 

      } 

     } 
    static class ListViewHolder 
     { 
      ImageView imgIcon; 
      TextView txtTitle; 
} 
} 

的main.xml：

<?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:id="@+id/PhoneMusicList" 
      android:layout_width="match_parent" 
      android:layout_height="wrap_content" 
      > 
     </ListView> 

    </LinearLayout> 

列表視圖排

  <ImageView android:id="@+id/imgIcon" 
      android:layout_width="wrap_content" 
      android:layout_height="fill_parent" 
      android:gravity="center_vertical" 
      android:layout_alignParentTop="true" 
      android:layout_alignParentBottom="true" 
      android:layout_marginRight="15dp" 
      android:layout_marginTop="5dp" 
      android:layout_marginBottom="5dp" /> 

     <TextView android:id="@+id/txtTitle" 
      android:layout_width="fill_parent" 
      android:layout_height="fill_parent" 
      android:gravity="center_vertical" 
      android:layout_alignParentTop="true" 
      android:layout_alignParentBottom="true" 
      android:textStyle="bold" 
      android:textSize="22dp" 
      android:textColor="#000000" 
      android:layout_marginTop="5dp" 
      android:layout_marginBottom="5dp" /> 

    </LinearLayout> 

Answer 1

你不能誇大你的看法是這樣的：

row = inflater.inflate(R.layout.listview_item_row, parent);

相反，你應該：

row = inflater.inflate(R.layout.listview_item_row, parent, false);

這將告訴parent，在這種情況下ListView，沒有附加的孩子。