Read All empty Edit text box in an Activty

public static EditText traverseEditTexts(ViewGroup v) {
  EditText invalid = null;
  for (int i = 0; i < v.getChildCount(); i++) {
   Object child = v.getChildAt(i);
   if (child instanceof EditText) {
    EditText e = (EditText) child;
    if (e.getText().length() == 0) // Whatever logic here to
        // determine if valid.
    {
     return e; // Stops at first invalid one. But you could add
        // this to a list.
    }
   } else if (child instanceof ViewGroup) {
    invalid = traverseEditTexts((ViewGroup) child); // Recursive
                // call.
    if (invalid != null) {
     break;
    }
   }
  }
  return invalid;
 }

Use the Above function to search a edit text in the Activty 

 

private boolean validateFields() {
  ViewGroup MainLayout = (ViewGroup) findViewById(R.id.LoginParentLayout);
  EditText emptyText = FormValidation.traverseEditTexts(MainLayout);
  if (emptyText != null) {
   String field = emptyText.getHint().toString();
   showToast(field + "  field cannot be empty.");
   emptyText.requestFocus(); // Scrolls view to this field.
  }
  return emptyText == null;
 }