Java EditText驗證不起作用

Question

我想在提交之前驗證表單中的用戶輸入，但它允許所有空字段經過...任何想法？我想 「」，而不是零，以及...

public void onClick(View v) { 
       EditText agencyname = (EditText) findViewById(R.id.agencyname); 
       String agency = agencyname.getText().toString(); 
       EditText firstname = (EditText) findViewById(R.id.firstname); 
       String first = firstname.getText().toString(); 
       EditText lastname = (EditText) findViewById(R.id.lastname); 
       String last = lastname.getText().toString(); 
       EditText phone = (EditText) findViewById(R.id.phone); 
       String agencyphone = phone.getText().toString(); 
       EditText email = (EditText) findViewById(R.id.email); 
       String agencyemail = email.getText().toString(); 
       if(agency != null || first != null || last != null || agencyphone != null || agencyemail != null){ 
      Intent i = new Intent(); 
      i.setClassName("android.com.smartchoice", "android.com.smartchoice.AgencyRecieve"); 
      i.putExtra("agencyname", agency); 
      i.putExtra("phone", agencyphone); 
      i.putExtra("email", agencyemail); 
      i.putExtra("firstname", first); 
      i.putExtra("lastname", last); 
      startActivity(i); 
       } 
       else 
       { 
        Toast.makeText(NewAgencyActivity.this, "Must Input All Fields", Toast.LENGTH_LONG).show(); 
       }; 


     } 

Answer 1

1. 呼叫agency.isEmpty()等檢查空字符串（""）。
2. 如果你想所有該字段是非空的，使用和（&&）而不是或（||）。