问题描述

在listview中使用自己的图像

我创建的程序里，想把10个图像显示在 ListView视图中
创建的类如下;

public class LayoutAdapterObj { public String addString; public ImageView leftImage; public String backgroundImageName; public LayoutAdapterObj(String addStringImageView leftImageNameString backgroundImageName){     this.addString = addString;     this.leftImage = leftImageName;     this.backgroundImageName = backgroundImageName; }

LayoutAdaptor对象

aArray.add(new LayoutAdapterObj(""1""new ImageView(null null R.drawable.frame1)R.drawable.layout""));    aArray.add(new LayoutAdapterObj(""2""new ImageView(null null R.drawable.frame2)R.drawable.layout""));    LayoutListAdapter m_adapter;    m_adapter = new LayoutListAdapter(this R.layout.topbarlayout aArray);

adapter类

 public View getView(int position View convertView ViewGroup parent) {                View v = convertView;                if (v == null) {                    LayoutInflater vi = (LayoutInflater)getContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);                        v = vi.inflate(R.layout.layout1 null);                }                LayoutAdapterObj o = items.get(position);                if (o != null) {                        TextView addText = (TextView) v.findViewById(R.id.addtext);                                             ImageView leftImage=(ImageView)v.findViewById(R.id.layoutframe);                        if(!o.backgroundImageName.equals(""""))                        {                        }                        if(addText!=null)                        {                            addText.setText(o.addString);                        }

错误信息：

java.lang.IllegalStateException: Could not execute method of the activityif(leftImage != null){    leftImage= o.leftImage;}

怎么出现的这个错误呢？

解决方案

请看这个例子：

 class UserListAdapter extends ArrayAdapter<String>         {                @Override            public int getCount() {                // TODO Auto-generated method stub                int temp;                if(SharedVariables.is_traffic_search_ON_flag){                    temp=search_cases_trafficTicketsList.size();                }else{                    temp=search_cases_criminalTicketsList.size();                }                return temp;            }            Activity context;            public UserListAdapter(Activity context) {                super(context 0);                Log.d(""hh""sgbdfjfdgfk"");                this.context = context;            }             class ViewHolder {                 RelativeLayout rl2;                 ImageView genderimage;                 TextView ticketcounttt;                 TextView name;                 TextView city;                 TextView added_date;            }            @SuppressWarnings(""unused"")            public View getView(final int position View convertView ViewGroup parent){//here we inflating the layout ""R.layout.cars_row""                ViewHolder holder;                View rowView = convertView;                if (rowView == null) {                    LayoutInflater inflater = context.getLayoutInflater();                    if(SharedVariables.is_traffic_search_ON_flag)rowView = inflater.inflate(R.layout.traffic_row null true);                    else rowView = inflater.inflate(R.layout.criminal_row null true);                    holder = new ViewHolder();                    holder.rl2=(RelativeLayout) rowView.findViewById(R.id.rl2);                     try{                    holder.genderimage=(ImageView) rowView.findViewById(R.id.genderimage);                    }catch (Exception e) {                        e.printStackTrace();                        // TODO: handle exception                    }                    holder.ticketcounttt=(TextView) rowView.findViewById(R.id.ticketcounttt);                    holder.name=(TextView) rowView.findViewById(R.id.textView1);                    holder.city=(TextView) rowView.findViewById(R.id.textView2);                    holder.added_date=(TextView) rowView.findViewById(R.id.textView333);                    //Traffic cases...                    if(SharedVariables.is_traffic_search_ON_flag)                    {                        if(search_cases_trafficTicketsList.get(position).CaseID!=0)holder.rl2.setBackgroundResource(R.drawable.green_color1); //Pink color...                        else  holder.rl2.setBackgroundResource(R.drawable.pink_color); //Green color...            if(search_cases_trafficTicketsList.get(position).Sex.equals(""M""))holder.genderimage.setBackgroundResource(R.drawable.man);                        else holder.genderimage.setBackgroundResource(R.drawable.woman);            holder.ticketcounttt.setTypeface(SharedVariables.font);            holder.name.setTypeface(SharedVariables.font);            holder.city.setTypeface(SharedVariables.font);            holder.added_date.setTypeface(SharedVariables.font);            holder.name.setText(search_cases_trafficTicketsList.get(position).FirstName+"" ""+search_cases_trafficTicketsList.get(position).LastName);            holder.city.setText(search_cases_trafficTicketsList.get(position).City+"" City""+""(""+search_cases_trafficTicketsList.get(position).ZIP+"")"");                        try{                            String s[]=search_cases_trafficTicketsList.get(position).ViolationDate.split(""/"");                            String month=SharedVariables.convertFromNumberToMonth(Integer.parseInt(s[0]));                            String day=s[1];                            String year=s[2].substring(04);                        holder.added_date.setText(""Added: ""+Integer.parseInt(day)+"" ""+month+"" ""+year);                          }catch (Exception e) {                            e.printStackTrace();                            // TODO: handle exception                        }                                   try{                            holder.ticketcounttt.setText(""""+search_cases_trafficTicketsList.get(position).Violations.split("").length);                        }catch (Exception e) {                            e.printStackTrace();                            // TODO: handle exception                        }                           }                    //Criminal casess...                    else{                        if(search_cases_criminalTicketsList.get(position).CaseID!=0)holder.rl2.setBackgroundResource(R.drawable.green_color1); //Pink color...                        else  holder.rl2.setBackgroundResource(R.drawable.pink_color); //Green color...                holder.ticketcounttt.setTypeface(SharedVariables.font);            holder.name.setTypeface(SharedVariables.font);            holder.city.setTypeface(SharedVariables.font);            holder.added_date.setTypeface(SharedVariables.font);            holder.name.setText(search_cases_criminalTicketsList.get(position).FirstName+"" ""+search_cases_criminalTicketsList.get(position).LastName);            holder.city.setText(search_cases_criminalTicketsList.get(position).City+"" City"");                        try{                            String s[]=search_cases_criminalTicketsList.get(position).ViolationDate.split(""/"");                            String month=SharedVariables.convertFromNumberToMonth(Integer.parseInt(s[0]));                            String day=s[1];                            String year=s[2].substring(04);                        holder.added_date.setText(""Added: ""+Integer.parseInt(day)+"" ""+month+"" ""+year);                          }catch (Exception e) {                            e.printStackTrace();                            // TODO: handle exception                        }                                   try{                            holder.ticketcounttt.setText(""""+search_cases_criminalTicketsList.get(position).Violations.split("").length);                        }catch (Exception e) {                            e.printStackTrace();                            // TODO: handle exception                        }                           }                    rowView.setTag(holder);                                 }                else                {                    holder = (ViewHolder) rowView.getTag();                }                return rowView;            }            @Override            public long getItemId(int position) {                // TODO Auto-generated method stub                return position;            }        }

然后再调用 adapter

UserListAdapter a=new UserListAdapter(); yurlistview.setAdapter(a);

解决方案二：
不用传drawable对象的，把R.drawable.frame1传进LayoutAdapterObj就行了，在adapter里
context.getResource（）.getDrawable(o.什么)就可以的

解决方案三：
楼主log太少了...
另外 leftImage= o.leftImage; 一般不会把一个控件传递给另一个控件
如果想设置图像 可以传递drawable对象