当我尝试从EditText捕获时，Android App崩溃

Question

So I am trying to make a contact form in an Alert Dialogue box which opens from a menu option. I have 3 EditText fields in my form and in my Main.java I read from those fields when the Send button in form is pressed and then I start an Email intent, or at least thats what it is supposed to do. Right now the app crashes as soon as I press the send button. Now I have troubleshooted the problem and it doesnt seem to be in the intent but it occurs when I read from the EditText fields. The code works fine when I take out the EditText reading part and just put filler information in its place, but I need this to work with the EditTexts. Thank you. My whole code for the option in the menu:

case R.id.menu_feedback:

    AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setTitle(R.string.menu_feedback);
LayoutInflater inflater = this.getLayoutInflater();

// Inflate and set the layout for the dialog
// Pass null as the parent view because its going in the dialog layout
builder.setView(inflater.inflate(R.layout.feedback, null));
// Add the buttons
builder.setNegativeButton(R.string.send, new DialogInterface.OnClickListener() {
       public void onClick(DialogInterface dialog, int id) {
           // User clicked OK button
           final EditText nameField = (EditText) findViewById(R.id.EditTextName);
           String name = nameField.getText().toString();
           final EditText emailField = (EditText) findViewById(R.id.EditTextEmail);
           String email = emailField.getText().toString();
           final EditText feedbackField = (EditText) findViewById(R.id.EditTextFeedbackBody);
           String feedback = feedbackField.getText().toString();
           final CheckBox responseCheckbox = (CheckBox) findViewById(R.id.CheckBoxResponse);
           boolean bRequiresResponse = responseCheckbox.isChecked();

           /* Create the Intent */
           final Intent emailIntent = new Intent(android.content.Intent.ACTION_SEND);

           /* Fill it with Data */
           emailIntent.setType("plain/text");
           emailIntent.putExtra(android.content.Intent.EXTRA_EMAIL, R.string.send_email);
           emailIntent.putExtra(android.content.Intent.EXTRA_SUBJECT, "Subject");
           emailIntent.putExtra(android.content.Intent.EXTRA_TEXT, feedback);

           /* Send it off to the Activity-Chooser */
           startActivity(Intent.createChooser(emailIntent, "Send mail..."));
           dialog.dismiss();

       }
   });
builder.setPositiveButton(R.string.cancel, new DialogInterface.OnClickListener() {
           public void onClick(DialogInterface dialog, int id) {
               dialog.dismiss();
           }
       });

// create alert dialog
AlertDialog alertDialog = builder.create();

// show it
alertDialog.show();

return true;

Answer 1

Ok, I assume your all EditTexts are written in feedback layout file for AlertDialog,

View dialogView = inflater.inflate(R.layout.feedback, null);
builder.setView(dialogView );

And Edittext are like,

// User clicked OK button
final EditText nameField = (EditText) dialogView.findViewById(R.id.EditTextName);
String name = nameField.getText().toString();
final EditText emailField = (EditText) dialogView.findViewById(R.id.EditTextEmail);
String email = emailField.getText().toString();
final EditText feedbackField = (EditText) dialogView.findViewById(R.id.EditTextFeedbackBody);
String feedback = feedbackField.getText().toString();

Actually, when you are inflating any view and you have to use child views of that views then you have to use the reference of that view and findViewById() method. So in your case, dialogView.findViewById();

Answer 2

use builder or inflater instances for Accessing EditText or other views from AlertDialog as :

 builder.setNegativeButton(R.string.send, new DialogInterface.OnClickListener() {
  public void onClick(DialogInterface dialog, int id) {
                           // User clicked OK button
   final EditText nameField = (EditText)inflater. findViewById(R.id.EditTextName);
   String name = nameField.getText().toString();
   final EditText emailField = (EditText)inflater. 
                                                 findViewById(R.id.EditTextEmail);
   String email = emailField.getText().toString();
   final EditText feedbackField = (EditText)inflater. 
                                          findViewById(R.id.EditTextFeedbackBody);
   String feedback = feedbackField.getText().toString();
// your code here..