Question

我已经使用了这个代码超过6个月，但是它已经花了几个小时不能调用getview，我不知道为什么。我记录了适配器大小，它有1项，但getView没有调用。

我还在getCount（）中记录了适配器大小，它有1个项目。这是代码：

public class ListAdapter extends BaseAdapter {
    Activity activity;
    public ArrayList<HashMap<String, String>> list;

    public ListAdapter(Activity activity, ArrayList<HashMap<String, String>> list) {
        super();
        this.activity = (Activity) activity;
        this.list = list;
    }

    public int getCount() {
        return list.size();

    }

    public Object getItem(int position) {
        return list.get(position);
    }

    public void addAll(ArrayList<HashMap<String, String>> result) {
        if (this.list == null) {
            this.list = result;
        } else {
            this.list.addAll(result);
        }
        notifyDataSetChanged();
    }

    public HashMap<String, String> geting(int position) {
        return list.get(position);
    }

    public long getItemId(int arg0) {
        return 0;
    }

    private class ViewHolder {
        ImageView img;
    }

    public View getView(int position, View convertView, ViewGroup parent) {
        Log.v("this","comes");
        ViewHolder holder;
        LayoutInflater inflater = activity.getLayoutInflater();
        if (convertView == null) {
            if(isTablet)
                convertView = inflater.inflate(R.layout.ads_ekhtesasi_grid, null);
            else
                convertView = inflater.inflate(R.layout.ads_ekhtesasi, null);
            holder = new ViewHolder();
            holder.img = (ImageView) convertView.findViewById(R.id.img);
            convertView.setTag(holder);
        } else {
            holder = (ViewHolder) convertView.getTag();
        }
        item = list.get(position);
        Log.v("this",item.get("img"));


        return convertView;
    }

    public void clear() {
        if (this.list.size() > 0)
            this.list.clear();
    }
}

正如你所看到的，我已经在getview的第一行登录，但它没有进入。

你可以帮帮我吗？那是为什么？

Answer 1

你忘记了@Override。将此方法标记为@Override，它将正常工作： public int getCount（） public Object getItem（int position） public View getView（int position，View convertView，ViewGroup parent）

public class ListAdapter extends BaseAdapter {
Activity activity;
public ArrayList<HashMap<String, String>> list;

public ListAdapter(Activity activity, ArrayList<HashMap<String, String>> list) {
    super();
    this.activity = (Activity) activity;
    this.list = list;
}

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

}

@Override
public Object getItem(int position) {
    return list.get(position);
}

public void addAll(ArrayList<HashMap<String, String>> result) {
    if (this.list == null) {
        this.list = result;
    } else {
        this.list.addAll(result);
    }
    notifyDataSetChanged();
}

public HashMap<String, String> geting(int position) {
    return list.get(position);
}

public long getItemId(int arg0) {
    return 0;
}

private class ViewHolder {
    ImageView img;
}

@Override
public View getView(int position, View convertView, ViewGroup parent) {
    Log.v("this","comes");
    ViewHolder holder;
    LayoutInflater inflater = activity.getLayoutInflater();
    if (convertView == null) {
        if(isTablet)
            convertView = inflater.inflate(R.layout.ads_ekhtesasi_grid, null);
        else
            convertView = inflater.inflate(R.layout.ads_ekhtesasi, null);
        holder = new ViewHolder();
        holder.img = (ImageView) convertView.findViewById(R.id.img);
        convertView.setTag(holder);
    } else {
        holder = (ViewHolder) convertView.getTag();
    }
    item = list.get(position);
    Log.v("this",item.get("img"));


    return convertView;
}

public void clear() {
    if (this.list.size() > 0)
        this.list.clear();
}

}

android getView没有调用基适配器

1 个答案: