Dialogfragment(Alert-Dialog) is crashing when I am trying to open it for the second time on Button Click

Question

Dialogfragment is crashing when i am trying to open it second time on button click.This Dialogfragment shows existing mail accounts in single select radio buttons. Here is my code :

public String[] allemails() {
    _accountMgr = AccountManager.get(getActivity());
    Account[] accounts = _accountMgr.getAccounts();
    numberOfEmail = accounts.length;
    String[] emailAddress = new String[numberOfEmail];

    for (Account account : accounts) {
        accountsList = account.name.toString();
        emailAddress[r] = accountsList;
        r += 1;
    }
    MyAlertDialog f = new MyAlertDialog();
    Bundle args = new Bundle();
    args.putStringArray("Title", emailAddress);
    f.setArguments(args);

    return emailAddress;
}

@Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
    // Use the Builder class for convenient dialog construction
    super.onCreate(savedInstanceState);
    setRetainInstance(true);

    AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
    builder.setTitle(Html.fromHtml("<font color='#FFFF'>"
            + "Choose Account" + "</font>"));

    builder.setIcon(R.drawable.ic_udinic);
    builder.setCancelable(false).setSingleChoiceItems(allemails(), -1,
            new DialogInterface.OnClickListener() {
                public void onClick(DialogInterface dialog, int id) {
                    AlertDialog alertDialog = (AlertDialog) dialog;
                    alertDialog.getButton(-1).setEnabled(true);

                }
            });
    builder.setCancelable(false).setPositiveButton("Set",
            new DialogInterface.OnClickListener() {

                public void onClick(DialogInterface dialog, int id) {

                    ((AlertDialog) dialog).getButton(id).setVisibility(
                            View.INVISIBLE);

                    ListView lw = ((AlertDialog) dialog).getListView();
                    CharSequence checkedItem = (CharSequence) lw
                            .getAdapter().getItem(
                                    lw.getCheckedItemPosition());

                    // Toast.makeText(getActivity(), checkedItem,
                    // Toast.LENGTH_LONG).show();

                    ((Main) getActivity()).doPositiveClick(checkedItem);
                    // dialog.dismiss();
                    // getDialog().dismiss();

                }
            });

    builder.setCancelable(false).setNegativeButton("Cancel",
            new DialogInterface.OnClickListener() {
                public void onClick(DialogInterface dialog, int id) {
                    // User cancelled the dialog

                    // Toast.makeText(getActivity(),
                    // "You Press Cancel Button", Toast.LENGTH_LONG).show();

                    // dialog.dismiss();

                }

            });

    dialog = builder.create();
    return dialog;
}

@Override
public void onStart() {
    super.onStart();
    dialog.getButton(Dialog.BUTTON_POSITIVE).setEnabled(false);
}

@Override
public void onDestroyView() {
    // Removes the dismiss message to avoid shown dialogs being dismissed.
    if (getDialog() != null && getRetainInstance())
        getDialog().setDismissMessage(null);

    super.onDestroyView();
}

Here is my Logcat :

    02-19 05:34:06.657: E/AndroidRuntime(1808): FATAL EXCEPTION: main
    02-19 05:34:06.657: E/AndroidRuntime(1808): Process: com.udinic.accounts_authenticator_example, PID: 1808
    02-19 05:34:06.657: E/AndroidRuntime(1808): java.lang.ArrayIndexOutOfBoundsException: length=1; index=1
    02-19 05:34:06.657: E/AndroidRuntime(1808):     at com.mycuratio.app.MyAlertDialog.allemails(MyAlertDialog.java:46)
    02-19 05:34:06.657: E/AndroidRuntime(1808):     at com.mycuratio.app.MyAlertDialog.onCreateDialog(MyAlertDialog.java:70)
    02-19 05:34:06.657: E/AndroidRuntime(1808):     at android.app.DialogFragment.getLayoutInflater(DialogFragment.java:398)
    02-19 05:34:06.657: E/AndroidRuntime(1808):     at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:890)
    02-19 05:34:06.657: E/AndroidRuntime(1808):     at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:1062)
    02-19 05:34:06.657: E/AndroidRuntime(1808):     at android.app.BackStackRecord.run(BackStackRecord.java:684)
    02-19 05:34:06.657: E/AndroidRuntime(1808):     at android.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1447)
    02-19 05:34:06.657: E/AndroidRuntime(1808):     at android.app.FragmentManagerImpl$1.run(FragmentManager.java:443)
    02-19 05:34:06.657: E/AndroidRuntime(1808):     at android.os.Handler.handleCallback(Handler.java:733)
    02-19 05:34:06.657: E/AndroidRuntime(1808):     at android.os.Handler.dispatchMessage(Handler.java:95)
    02-19 05:34:06.657: E/AndroidRuntime(1808):     at android.os.Looper.loop(Looper.java:136)
    02-19 05:34:06.657: E/AndroidRuntime(1808):     at android.app.ActivityThread.main(ActivityThread.java:5017)
    02-19 05:34:06.657: E/AndroidRuntime(1808):     at java.lang.reflect.Method.invokeNative(Native Method)
    02-19 05:34:06.657: E/AndroidRuntime(1808):     at java.lang.reflect.Method.invoke(Method.java:515)
    02-19 05:34:06.657: E/AndroidRuntime(1808):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779)
    02-19 05:34:06.657: E/AndroidRuntime(1808):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595)
    02-19 05:34:06.657: E/AndroidRuntime(1808):     at dalvik.system.NativeStart.main(Native Method)

Answer 1

before for loop, reset the value of r to zero.

r = 0;
for (Account account : accounts) {
    accountsList = account.name.toString();
    emailAddress[r] = accountsList;
    r += 1;
}

Answer 2

I believe unable to add window token null is the error you are receiving. And as @Gopal said probable reason is that you are calling,

super.onCreate(savedInstanceState);

or there are chances that you are mistakenly leaking out the reference to the activity somewhere.

Please see the below link for more details on this. Dialog throwing "Unable to add window — token null is not for an application” with getApplication() as context

Pardon me if this is not the case.