如何檢查選定的警報對話框項目？

Question

我在textview上設置了警告對話框，我在這裏使用了String數組，現在如何選中沒有任何項目被選中或沒有選中，如果沒有項目選擇它不應該提交..請檢查我的代碼片段代碼在下面..感謝提前。 。

sp3=(TextView)findViewById(R.id.daydates); 
    btnsubmit=(Button)findViewById(R.id.btnreg); 

final String[] items = new String[] {"01","02","03","04","05","06","07","08","09","10","11","12","13","14","15","16","17","18","19","20","21","22","23","24","25","26","27","28","29","30","31"}; 
    final ArrayAdapter<String> adapter123 = new ArrayAdapter<String>(this, 
      android.R.layout.simple_spinner_dropdown_item, items); 


    sp3.setOnClickListener(new OnClickListener() { 

     @Override 
     public void onClick(View w) { 
       new AlertDialog.Builder(RegistrationForm.this) 
       .setTitle("Select Day") 
       .setAdapter(adapter123, new DialogInterface.OnClickListener() { 

       @Override 
       public void onClick(DialogInterface dialog, int which) { 

        sp3.setText(adapter123.getItem(which).toString()); 

        dialog.dismiss(); 
       } 
       }).create().show(); 
      } 
    }); 
    btnsubmit.setOnClickListener(new OnClickListener() 
    { 

     @Override 
     public void onClick(View v) 
     { 
      if(emailtext.getText().toString().trim().length() > 0 && passtext.getText().toString().trim().length() > 0 && confirmpass.getText().toString().trim().length() > 0 && username.getText().toString().trim().length() > 0 && firstname.getText().toString().trim().length() > 0 && lastname.getText().toString().trim().length() > 0 && isSetDay==true && isSetMonth==true && isSetYear==true && isSetPro==true) 
     { 
      isSetDay=false; 
      isSetMonth=false; 
      isSetYear=false; 
      isSetPro=false; 
     new AttemptLogin().execute(); 

     final String uname=username.getText().toString(); 
     if(!isValidUserName(uname)) 
     { 
      username.setError("Invalid User Name"); 
     } 
     final String fname=firstname.getText().toString(); 
     if(!isValidFirstName(fname)) 
     { 
      firstname.setError("Invalid First Name"); 
     } 
     final String lname=lastname.getText().toString(); 
     if(!isValidLastName(lname)) 
     { 
      lastname.setError("Invalid Last Name"); 
     } 

     } 

     else 
     { 
      Toast.makeText(getApplicationContext(), "Fill the details", Toast.LENGTH_LONG).show(); 
     } 
     break; 
     } 
    }); 

Answer 1

你爲什麼不只是使用一個布爾值，以確定是否點擊時btnSubmit按鈕，然後復位它，如果你需要重新使用它SP3已設置。

這是我的建議：

sp3=(TextView)findViewById(R.id.daydates); 
btnsubmit=(Button)findViewById(R.id.btnreg); 
boolean isSet = false; 

final String[] items = new String[] {"01","02","03","04","05","06","07","08","09","10","11","12","13","14","15","16","17","18","19","20","21","22","23","24","25","26","27","28","29","30","31"}; 
    final ArrayAdapter<String> adapter123 = new ArrayAdapter<String>(this, 
      android.R.layout.simple_spinner_dropdown_item, items); 


    sp3.setOnClickListener(new OnClickListener() { 

     @Override 
     public void onClick(View w) { 
       new AlertDialog.Builder(RegistrationForm.this) 
       .setTitle("Select Day") 
       .setAdapter(adapter123, new DialogInterface.OnClickListener() { 

       @Override 
       public void onClick(DialogInterface dialog, int which) { 

        sp3.setText(adapter123.getItem(which).toString()); 
        isSet = true; 

        dialog.dismiss(); 
       } 
       }).create().show(); 
      } 
    }); 

    btnsubmit.setOnClickListener(new OnClickListener() 
    { 

     @Override 
     public void onClick(View v) 
     { 
      if(!isSet) 
      { 
       //Do Something 
       isSet = false; 
      } 
     } 
    });