如何在android中的一个活动中使用多个微调器？

Question

在我的应用程序中，我正在使用2个微调器。我在两个微调器上使用onitemselectedListener但在我的第二个微调器监听器中不起作用。 如果有人能建议我适当的解决方案.... 我的代码是......

public class Expense extends Activity {
Spinner datype,distance;

public void onCreate(Bundle b){
    super.onCreate(b);
    setContentView(R.layout.expense);
datype=(Spinner)findViewById(R.id.da_type);
    distance=(Spinner)findViewById(R.id.da_distance);

List<String>data1=new ArrayList<String>();
    data1.add("Local");
    data1.add("Ex-Station Double Side");
    data1.add("Ex-Station Single Side");
    data1.add("Out-Station Double Side");
    data1.add("Out-Station Single Side");
    ArrayAdapter<String>adapter=new ArrayAdapter<String>(this,android.R.layout.simple_spinner_item,data1);
    adapter.setDropDownViewResource(android.R.layout.simple_list_item_single_choice);
    datype.setAdapter(adapter);
datype.setOnItemSelectedListener(new OnItemSelectedListener() {

        @Override
        public void onItemSelected(AdapterView<?> arg0, View arg1,
                int arg2, long arg3) {
            // TODO Auto-generated method stub
            if(datype.getSelectedItem().toString().equals("Local")){
                mainlayout.setVisibility(View.GONE);

            }

            else {
                mainlayout.setVisibility(View.VISIBLE);
            } 
            if(datype.getSelectedItem().toString().equals("Local")){
                try{
                Statement smt=mycon.connection().createStatement();
                rs=smt.executeQuery("DCR_GETEXPENSE '"+PA_ID+"'");
                while(rs.next()){
                    daAmt.setText(rs.getString("DA_L"));
                }
                }catch(Exception e){
                    e.printStackTrace();
                }
            }
            else if(datype.getSelectedItem().toString().equals("Ex-Station Double Side")||datype.getSelectedItem().toString().equals("Ex-Station Single Side")){
                try{
                    Statement smt=mycon.connection().createStatement();
                    rs=smt.executeQuery("DCR_GETEXPENSE '"+PA_ID+"'");
                    while(rs.next()){
                        daAmt.setText(rs.getString("DA_EX"));
                    }
                    }catch(Exception e){
                        e.printStackTrace();
                    }
            }
            else{
                try{
                    Statement smt=mycon.connection().createStatement();
                    rs=smt.executeQuery("DCR_GETEXPENSE '"+PA_ID+"'");
                    while(rs.next()){
                        daAmt.setText(rs.getString("DA_NS"));
                    }
                    }catch(Exception e){
                        e.printStackTrace();
                    }
            }


        }

        @Override
        public void onNothingSelected(AdapterView<?> arg0) {
            // TODO Auto-generated method stub

        }
    });
    station=new ArrayList<String>();
    try{
    CallableStatement  stmt=mycon.connection().prepareCall("DCRDOCTORGRID '"+PA_ID+"','','','','','','',''");
    stmt.execute();
     rs=stmt.getResultSet();
     rs.close();//i'st table
     stmt.getMoreResults();
     rs=stmt.getResultSet();
     rs.close();//2'nd table
     stmt.getMoreResults();
     rs=stmt.getResultSet();
     while(rs.next()){
         station.add(rs.getString("STATION_NAME"));
     }
    }catch(Exception e){
        e.printStackTrace();
    }
    ArrayAdapter<String>adapter2=new ArrayAdapter<String>(this,android.R.layout.simple_spinner_item,station);
    adapter2.setDropDownViewResource(android.R.layout.simple_list_item_single_choice);
    distance.setAdapter(adapter2);

    distance.setOnItemSelectedListener(new OnItemSelectedListener() {

        @Override
        public void onItemSelected(AdapterView<?> arg0, View arg1,
                int arg2, long arg3) {
            // TODO Auto-generated method stub
            if(distance.getSelectedItem().toString().equals("Zero Kilometer")){
                Toast.makeText(getApplicationContext(),"0000",Toast.LENGTH.Short).show();
            }

        }

        @Override
        public void onNothingSelected(AdapterView<?> arg0) {
            // TODO Auto-generated method stub

        }
    });

在第二个微调器中，当我从微调器中选择该值时，我的toast没有显示 请帮帮我