Question

作为android的新手我试图在我的项目上实现List视图。列表视图有效。但是我只能在列表中看到一行。我希望动态添加尽可能多的行。我创建了一个单独的XML，它定义了列表视图中单行的结构。这是我到目前为止编码的内容：

public class Offers extends Activity 
{
    ListView latesttrans;

    ArrayList<String> listItems = new ArrayList<String>();
    @Override
    protected void onCreate(Bundle savedInstanceState) 
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_offers);
        latesttrans = (ListView) findViewById(R.id.listView1);
        latesttrans.setAdapter(new mylist2(this));
    }
}
    class SingleRow2
    {
        String title;
        String description;
        SingleRow2(String title, String description)
        {
            this.title=title;
            this.description=description;
        }
    }
    class mylist2 extends BaseAdapter
    {
        int i=0;
        Boolean flagValue = false;
        ArrayList<SingleRow> list;
        Context context;
        mylist2(Context c)
        {
            context=c;
            list=new ArrayList<SingleRow>();
            Resources res = c.getResources();
            String[] title = res.getStringArray(R.array.titles);
            String[] description = res.getStringArray(R.array.description);

                list.add(new SingleRow(title[i],description[i]));
                i++;
        }

        @Override
        public int getCount() 
        {
            // TODO Auto-generated method stub
            return list.size();
        }

        @Override
        public Object getItem(int arg0) 
        {
            // TODO Auto-generated method stub
            return list.get(arg0);
        }

        @Override
        public long getItemId(int arg0) 
        {
            // TODO Auto-generated method stub
            return arg0;
        }

        @Override
        public View getView(int arg0, View arg1, ViewGroup viewGroup) 
        {
            // TODO Auto-generated method stub
            LayoutInflater inflater= (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
            View row = inflater.inflate(R.layout.single_row_offers,viewGroup,false);

            Uri latesttransuri = Uri.parse("content://sms/inbox");
            Cursor latesttranscursor = context.getContentResolver().query(latesttransuri, new String[]{"_id","address","date","body"}, null, null, null);

            if(flagValue == false)
            {
                latesttranscursor.moveToFirst();
                flagValue = true;
            }

            String address = null,body = null;
            int i=0;

                while(latesttranscursor.moveToNext())
                {
                    address=latesttranscursor.getString(1);
                    long date = latesttranscursor.getLong(2);
                    String sdate = millisToDate(date);
                    body = latesttranscursor.getString(3);

                    if(body.contains("FREE"))
                    {
                        TextView title = (TextView) row.findViewById(R.id.textViewSingleOffer1);
                        TextView description = (TextView) row.findViewById(R.id.textViewSingleOffer2);
                        title.setText(address);
                        description.setText(body);
                    }
                    else if(body.contains("unlimited"))
                    {
                        TextView title = (TextView) row.findViewById(R.id.textViewSingleOffer1);
                        TextView description = (TextView) row.findViewById(R.id.textViewSingleOffer2);
                        title.setText(address);
                        description.setText(body);
                    }

                }

            return row;
        }
        public String millisToDate(long currentTime) 
        {
            String finalDate;
            Calendar calendar = Calendar.getInstance();
            calendar.setTimeInMillis(currentTime);
            Date date = calendar.getTime();
            finalDate = date.toString();
            return finalDate;
        }

    }

Answer 1

您不会迭代您的商品。在适配器的构造函数中，您只需增加一次，然后停止。这导致有一行。将它更改为for循环，如下所示：

for(int i = 0; i < var; i++) {
  list.add(new SingleRow(title[i], description[i]));
}

其中var是您从资源中检索的数组的大小。

有关ListView和适配器使用的更多信息：http://www.ezzylearning.com/tutorial/customizing-android-listview-items-with-custom-arrayadapter

动态创建列表视图不会在android中显示多行

1 个答案: