Attempt to invoke virtual method 'android.text.Editable android.widget.EditText.getText()' on a null object reference error

Question

I created a DialogFragment. The Dialog got a EditText and I call it from the dialog xml. But there is the error: Attempt to invoke virtual method 'android.text.Editable android.widget.EditText.getText()' on a null object reference

New in this code:

    AlertDialog alertDialog;
AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());

and

final EditText editText = (EditText) alertDialog.findViewById(R.id.editTextPasswordDeveloper);

My Code:

public class DeveloperLoginDialogFragment extends DialogFragment {

EditText editText;

@Override
public Dialog onCreateDialog(Bundle savedInstanceState) {

    final LayoutInflater inflaterDialog = getActivity().getLayoutInflater();

    AlertDialog alertDialog;
    AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());

    alertDialog = builder.create();

   // final AlertDialog alertDialog = new AlertDialog.Builder(getActivity());
    builder.setCancelable(false);
    builder.setView(inflaterDialog.inflate(R.layout.alertdialog_developer, null));
    final EditText editText = (EditText) alertDialog.findViewById(R.id.editTextPasswordDeveloper);
    builder.setTitle("Entwickler-Login");
    builder.setMessage("Um dich als Entwickler zu verifizieren, gib den Entwickler-Code bitte unten ein.");
    builder.setPositiveButton("Verifizieren", new DialogInterface.OnClickListener() {
        @Override
        public void onClick(DialogInterface dialog, int which) {
            if(editText.getText().toString().equals("7846")) {
                dialog.dismiss();
                Toast.makeText(getActivity().getApplicationContext(),"Erfolgreich verifiziert!", Toast.LENGTH_LONG).show();
            }
        }
    });
    builder.setNegativeButton("Abbrechen", new DialogInterface.OnClickListener() {
        @Override
        public void onClick(DialogInterface dialog, int which) {
            Intent intent = new Intent(getActivity(), MainActivity.class);
            startActivity(intent);
        }
    });
    return builder.create();
}

}

You are calling `findViewById` on an object before assigning any value to it. Perhaps you wanna assign value of `inflaterDialog.inflate` to a View variable and then do `view.findViewById` — Sourabh, Mar 01 '17 at 16:20

score 1 · Answer 1 · answered Mar 01 '17 at 16:20

editText = (EditText) editText.findViewById(R.id.editTextPasswordDeveloper);

You are calling findViewById() on editText which is null. You probably want to use EditText editText = (EditText) alertDialog.findViewById(R.id.label_field); instead.

Note the use of alertDialog rather than editText.

Remario · Accepted Answer · 2017-03-01T17:33:49.057

1

the problem is simple you are using the edit text to find a view. You have two options either inflate a layout then use findViewById or use the alertDialog.findViewById();

try this.

AlertDialog.Builder builder = new AlertDialog.Builder(FeedFragment.this.getActivity());
    builder.setView(R.layout.layout_edit_review);
    builder.setCancelable(true);
    Dialog dialog = builder.create();
    dialog.show();
    TextInputEditText text_edit = (TextInputEditText) dialog.findViewById(R.id.editReview);

try something like that.

edited Mar 01 '17 at 17:33

answered Mar 01 '17 at 16:21

Remario

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Thanks! But now it says: ttempt to invoke virtual method 'android.text.Editable android.widget.EditText.getText()' on a null object reference – N.Preusche Mar 01 '17 at 16:42
first set the view for the builder.then call findViewById – Remario Mar 01 '17 at 16:45
It is because .getText() – N.Preusche Mar 01 '17 at 16:53
if you refactored the code, the get text function should work. – Remario Mar 01 '17 at 16:54
I have entered it above – N.Preusche Mar 01 '17 at 17:21
Hey, show me the new changes to code. – Remario Mar 01 '17 at 17:25
See it above (again). The problem is the error message: Attempt to invoke virtual method 'android.text.Editable android.widget.EditText.getText()' on a null object reference – N.Preusche Mar 01 '17 at 17:29
oh i see the problem, you are calling create before you set the view. set the view then call create on builder. Create method registers and links the layout, if you create then add layout it wont work. – Remario Mar 01 '17 at 17:42
is it working now after changing the statements? – Remario Mar 01 '17 at 17:46

Attempt to invoke virtual method 'android.text.Editable android.widget.EditText.getText()' on a null object reference error

2 Answers2