我創建的程序裡，想把10個圖像顯示在 ListView視圖中
創建的類如下;
public class LayoutAdapterObj {
public String addString;
public ImageView leftImage;
public String backgroundImageName;
public LayoutAdapterObj(String addString,ImageView leftImageName,String backgroundImageName){
this.addString = addString;
this.leftImage = leftImageName;
this.backgroundImageName = backgroundImageName;
}
LayoutAdaptor對象
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類
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);
}
錯誤信息：
java.lang.IllegalStateException: Could not execute method of the activity
if(leftImage != null)
{
leftImage= o.leftImage;
}
怎麼出現的這個錯誤呢？
請看這個例子：
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(0,4);
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(0,4);
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;
}
}
然後再調用 adapter
UserListAdapter a=new UserListAdapter(); yurlistview.setAdapter(a);
