ListFragment 错误

Posted 2023-04-18

【中文标题】ListFragment 错误

【英文标题】：ListFragment error

【发布时间】：2013-01-20 17:38:38

【问题描述】：

我在“listview”中有一个列表，可以使用这个混乱滚动列表， 分组，列表有一个带有图标的标题。

公共类 MyCustomAdapter 扩展 BaseAdapter

private static final String ASSETS_DIR = "images/";
private static final int TYPE_HEAD = -1;
private static final int TYPE_ITEM = 0;
private static final int TYPE_SEPARATOR = 1;
private static final int TYPE_MAX_COUNT = TYPE_SEPARATOR + 1;


private Context ctx;

private ArrayList<String> mData = new ArrayList<String>();
private LayoutInflater mInflater;

private TreeSet<Integer> mSeparatorsSet = new TreeSet<Integer>();

public MyCustomAdapter(Context context) 
    this.ctx = context;
    mInflater = (LayoutInflater) ctx
            .getSystemService(Context.LAYOUT_INFLATER_SERVICE);


public void addItem(final String item) 
    mData.add(item);
    notifyDataSetChanged();


public void addSeparatorItem(final String item) 
    mData.add(item);
    mSeparatorsSet.add(mData.size() - 1);
    notifyDataSetChanged();


public void addHeadItem()
    mData.add("");
    mSeparatorsSet.add(0);
    notifyDataSetChanged();


@Override
public int getCount() 

    return mData.size();
    //return equipos.size();


@Override
public String getItem(int position) 

    return mData.get(position) ;


@Override
public long getItemId(int position) 
    // TODO Auto-generated method stub
    return position;


@Override
public int getItemViewType(int position) 
    if (position==0)
        return TYPE_HEAD;

    return mSeparatorsSet.contains(position) ? TYPE_SEPARATOR : TYPE_ITEM;


@Override
public int getViewTypeCount() 
    return TYPE_MAX_COUNT;


@Override
public View getView(int position, View convertView, ViewGroup parent) 

    ViewHolder holder = null;
    int type = getItemViewType(position);
    System.out.println("getView " + position + " " + convertView
            + " type = " + type);
    if (convertView == null) 
        holder = new ViewHolder();
        switch (type) 
        case TYPE_ITEM:
            convertView = mInflater.inflate(R.layout.list_item, null);

            holder.textView1 = (TextView) convertView.findViewById(R.id.textView1);
            holder.textView2 = (TextView) convertView.findViewById(R.id.textView2);
            holder.textView3 = (TextView) convertView.findViewById(R.id.textView3);
            holder.imageView1 = (ImageView) convertView.findViewById(R.id.imageView1);

            String[] datos = mData.get(position).split("-");

            holder.textView1.setText(String.format(" %s - %s", datos[0],datos[1]));
            holder.textView2.setText(datos[2]);
            holder.textView3.setText(datos[3]);

            String sel_bandera =  datos[4].trim() ;

            String imgFilePath = "";

            if (sel_bandera.equals("verde"))
                 imgFilePath = ASSETS_DIR + "circle_green.png" ;
            else if (sel_bandera.equals("amarilla"))
                 imgFilePath = ASSETS_DIR + "circle_yellow.png";
            else 
                 imgFilePath = ASSETS_DIR + "circle_red.png";
            
            try 
                Bitmap bitmap = BitmapFactory.decodeStream(this.ctx.getResources().getAssets().open(imgFilePath));
                holder.imageView1.setImageBitmap(bitmap);
                //bandera.setImageBitmap(bitmap);
             catch (IOException e) 
                e.printStackTrace();
            


            break;
        case TYPE_SEPARATOR:
            convertView = mInflater.inflate(R.layout.list_group, null);
            holder.textView1 = (TextView) convertView.findViewById(R.id.textSeparator);
            holder.textView1.setText(mData.get(position));
            break;

        case TYPE_HEAD:
            convertView = mInflater.inflate(R.layout.list_head, null);

            break;
        
        convertView.setTag(holder);
     else 
        holder = (ViewHolder) convertView.getTag();
    

    return convertView;




public static class ViewHolder 

    public TextView textView1;
    public TextView textView2;
    public TextView textView3;
    public ImageView imageView1;

    public TextView getTextView1() 
        return textView1;
    
    public void setTextView1(TextView textView1) 
        this.textView1 = textView1;
    
    public TextView getTextView2() 
        return textView2;
    
    public void setTextView2(TextView textView2) 
        this.textView2 = textView2;
    
    public TextView getTextView3() 
        return textView3;
    
    public void setTextView3(TextView textView3) 
        this.textView3 = textView3;
    
    public ImageView getImageView1() 
        return imageView1;
    
    public void setImageView1(ImageView imageView1) 
        this.imageView1 = imageView1;
    

公共类 EquiposActivity 扩展 ListFragment 实现 OnTouchListener

public View onCreateView(LayoutInflater inflater, ViewGroup 容器, 捆绑保存的InstanceState） mAdapter = new MyCustomAdapter(getActivity());

            if (lista.length > 0) 
                String[] datos = lista[0].split("-");
                cabecera_grupo = datos[4];
            

            mAdapter.addHeadItem();

            for (int i = 0; i < lista.length; i++) 

                String[] datos = lista[i].split("-");
                String grupo = datos[4];


                if (i == 0) 
                    mAdapter.addSeparatorItem(grupo.replace("_", " "));

                

                if (!grupo.equals(cabecera_grupo)) 

                    mAdapter.addSeparatorItem(grupo.replace("_", " "));
                    cabecera_grupo = grupo;
                

                mAdapter.addItem(String.format("%s - %s - %s - %s - %s",
                        datos[0], datos[1], datos[2], datos[3], datos[5]));

            

            setListAdapter(mAdapter);

return super.onCreateView(inflater, container, savedInstanceState);

【问题讨论】：

有什么问题？什么错误？

报错是滚动列表时出现乱码

【参考方案1】：

我建议你重写你的 getView() 方法，因为我认为你错误地使用了 ViewHolder 模式。阅读：http://www.jmanzano.es/blog/?p=166 或者干脆去掉 ViewHolder 并在没有它的情况下编写 getView() 代码。