Question

我正在尝试在listview中显示多个布局。我在列表视图中只有三个项目，每行都有不同的布局。这是我正在使用的代码

private class CompetitionDetailsAdapter extends ArrayAdapter<Article> {


public CompetitionDetailsAdapter(Context context, int textViewResourceId
                ) {
            super(context, 0);
            // TODO Auto-generated constructor stub
        }

        @Override
        public int getCount() {
            return 3;
        }

        @Override
        public int getItemViewType(int position) {
            return position;
        }

        @Override
        public int getViewTypeCount() {
            return 3;
        }



        @Override
        public View getView(int position, View convertView, ViewGroup parent) 
        {
            // TODO Auto-generated method stub
            //return super.getView(position, convertView, parent);
            LayoutInflater inflater=getLayoutInflater();
            int type = getItemViewType(position);
            switch(type)
            {
                case 0:
                {
                    View headerCell = inflater.inflate(R.layout.rsscellheader, null);
                    ImageView imageView = (ImageView)headerCell.findViewById(R.id.headerCellImage);
                    TextView title = (TextView)headerCell.findViewById(R.id.txt_HeaderCellTitle);
                    TextView date = (TextView)headerCell.findViewById(R.id.txt_HeaderCellDate);
                    Activity activity = (Activity) getContext();
                    imageLoader.DisplayImage(appDeleg.getSelectedCompetition().getImage(), activity, imageView);
                    return headerCell;
                    //break;
                }
                case 1:
                {
                    View webViewCell = inflater.inflate(R.layout.rsswebviewcell, null);
                    WebView webView = (WebView)webViewCell.findViewById(R.id.webView);
                    webView.loadData(appDeleg.getSelectedCompetition().getDescription(), "text/html", "utf-8");
                    return webViewCell;
                }
                case 2:
                {
                    View buttonCell = inflater.inflate(R.layout.rssbuttoncell, null);
                    ImageButton btnWebView = (ImageButton)buttonCell.findViewById(R.id.btn_WebView);
                    return btnWebView;
                }
            }
            return convertView;
        }
    }

但是在运行崩溃并给出错误时

10-25 14:00:14.298: ERROR/AndroidRuntime(3102): java.lang.ClassCastException: android.widget.LinearLayout$LayoutParams
10-25 14:00:14.298: ERROR/AndroidRuntime(3102):     at android.widget.ListView.measureScrapChild(ListView.java:1117)
10-25 14:00:14.298: ERROR/AndroidRuntime(3102):     at android.widget.ListView.measureHeightOfChildren(ListView.java:1200)
10-25 14:00:14.298: ERROR/AndroidRuntime(3102):     at android.widget.ListView.onMeasure(ListView.java:1109)
10-25 14:00:14.298: ERROR/AndroidRuntime(3102):     at android.view.View.measure(View.java:8172)

有人可以帮忙吗？我怎么能在android中做到这一点？感谢

Answer 1

我发现了这个问题。在案例2中返回类型的错误。而不是视图我返回一个ImageButton 这是正确的代码

case 2:
{     
    View buttonCell = inflater.inflate(R.layout.rssbuttoncell, null);
    ImageButton btnWebView = (ImageButton)buttonCell.findViewById(R.id.btn_WebView);

    return buttonCell;
}

Answer 2

我认为你的错误是你试图在列表中放置超过3个项目，当你的列表大于那个时它会显示你的错误...试试这个：

private class CompetitionDetailsAdapter extends ArrayAdapter<Article> {
int i =0;

public CompetitionDetailsAdapter(Context context, int textViewResourceId
                ) {
            super(context, 0);
            // TODO Auto-generated constructor stub
        }

        @Override
        public int getCount() {
            return 3;
        }

        @Override
        public int getItemViewType(int position) {
            return position;
        }

        @Override
        public int getViewTypeCount() {
            return 3;
        }



        @Override
        public View getView(int position, View convertView, ViewGroup parent) 
        {
            // TODO Auto-generated method stub
            //return super.getView(position, convertView, parent);
            LayoutInflater inflater=getLayoutInflater();

            switch(i)
            {
                case 0:
                {
                    View headerCell = inflater.inflate(R.layout.rsscellheader, null);
                    ImageView imageView = (ImageView)headerCell.findViewById(R.id.headerCellImage);
                    TextView title = (TextView)headerCell.findViewById(R.id.txt_HeaderCellTitle);
                    TextView date = (TextView)headerCell.findViewById(R.id.txt_HeaderCellDate);
                    Activity activity = (Activity) getContext();
                    imageLoader.DisplayImage(appDeleg.getSelectedCompetition().getImage(), activity, imageView);
                    return headerCell;
                    i++;
                    //break;
                }
                case 1:
                {
                    View webViewCell = inflater.inflate(R.layout.rsswebviewcell, null);
                    WebView webView = (WebView)webViewCell.findViewById(R.id.webView);
                    webView.loadData(appDeleg.getSelectedCompetition().getDescription(), "text/html", "utf-8");
                    i++;
                    return webViewCell;
                }
                case 2:
                {
                    View buttonCell = inflater.inflate(R.layout.rssbuttoncell, null);
                    ImageButton btnWebView = (ImageButton)buttonCell.findViewById(R.id.btn_WebView);
                    i = 0;
                    return btnWebView;
                }
            }
            return convertView;
        }
    }

在ListView中加载多个布局

2 个答案: