Question

我创建了一个机票预订应用程序，其中将保存关于乘客的以下数据。 1）乘客姓名 2）乘客电话号码 3）乘客将前往的城市 4）乘客将前往的城市

我的代码如下

public class TicketReservationView extends Activity implements OnClickListener {

private static Database theDatabase;
private EditText etName,etContact;
private Spinner spFrom,spTo;
private Button bSave,bShowSms;
private SQLiteDatabase db;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.ticket_reservation_view);

    etName    = (EditText)findViewById(R.id.etPassengerName);
    etContact = (EditText)findViewById(R.id.etContactNo);

    spFrom = (Spinner)findViewById(R.id.spFrom);
    spTo   = (Spinner)findViewById(R.id.spTo);

    bSave = (Button)findViewById(R.id.bSave);
    bSave.setOnClickListener(this);

    bShowSms = (Button)findViewById(R.id.bShowSms);
    bShowSms.setOnClickListener(this);      

    db = theDatabase.getWritableDatabase();
    theDatabase.insert_city_data(db);
    db.close();

    loadData();


private  void loadData()
{
    db=theDatabase.getReadableDatabase();
    String[] cities=theDatabase.getCitiesData(db);

    ArrayAdapter<String> fromAdapter  = new ArrayAdapter<String>(TicketReservationView.this,android.R.layout.simple_spinner_item,cities);
    fromAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
    spFrom.setAdapter(fromAdapter);

    spTo.setAdapter(fromAdapter);
    db.close();
}
private String[] fillData()
{
    String[] data= new String[4];

    data[0] = etName.getText().toString();
    data[1] = etContact.getText().toString();
    data[2] = (String)spFrom.getSelectedItem();
    data[3] = (String)spTo.getSelectedItem();

    return data;
}


switch(view.getId())
    {
    case R.id.bSave:
        db = theDatabase.getReadableDatabase();
        boolean isPassengerExist = theDatabase.getPassengerExistance(db,etContact.getText().toString());
        db.close();
        if(!isPassengerExist)
        {
            String[] data = fillData();
            db = theDatabase.getWritableDatabase();
            theDatabase.insert_ticket_data(data,db);
            showToast("Data saved Successfully");
            db.close();
        }
        else
        {


            Toast.makeText(getBaseContext(), "Already Exist!", Toast.LENGTH_LONG).show();

        }

        break;

现在的问题是，如果FROM城市和TO城市相同，它应该显示CITY NAMES相同的Toast。我试过以下代码

if(spFrom.getSelectedItem().equals(spTo.getSelectedItem()))

{
      toast: "city names are same"

}

但它对我不起作用

Answer 1

使用此

if(spFrom.getSelectedItem().toString().equals(spTo.getSelectedItem().toString())){
  Toast.makeText(this,"city names are same",Toast.LENGTH_LONG).show();
}

这将有效

如何比较两个微调项目？

1 个答案: