Android disabilitare il pulsante positivi su alcuni condion in addTextChangedListener (EditExt)

Question

Ecco il mio codice per una finestra di dialogo, voglio disabilitare il pulsante positivo se la dimensione del testo in edit-testo in maggiore di 5 e abilitarlo se la dimensione < = 5

private void myDialog(String title) { 
      AlertDialog.Builder builder = new AlertDialog.Builder(context); 


      // Get the layout inflater 
      LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE); 

      View dialogView = inflater.inflate(R.layout.new_dialog, null); 

      // Inflate and set the layout for the dialog 
      // Pass null as the parent view because its going in the dialog layout 
      builder.setView(dialogView); 

      final EditText dialogEdittext = (EditText) dialogView.findViewById(R.id.dialog_editText); 
      final TextView dialogMessage = (TextView) dialogView.findViewById(R.id.dialog_limit); 

      dialogEdittext.addTextChangedListener(new TextWatcher() { 

       @Override 
       public void onTextChanged(CharSequence s, int start, int before, int count) { 
       } 

       @Override 
       public void beforeTextChanged(CharSequence s, int start, int count, int after) { 
       } 

       @Override 
       public void afterTextChanged(Editable s) { 

        // if text length is greater than 5 disable positive button 
           // else enable 
       } 
      }); 

      builder.setPositiveButton("Ok", new DialogInterface.OnClickListener() { 
       @Override 
       public void onClick(DialogInterface dialog, int id) { 

      }); 

      builder.setNegativeButton("Cancel", new DialogInterface.OnClickListener() { 
       @Override 
       public void onClick(DialogInterface dialog, int id) { 
       } 
      }); 

      final Dialog dialog = builder.create(); 
      dialog.getWindow().setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_STATE_ALWAYS_VISIBLE); 
      dialog.show(); 

     } 

Answer 1

provare qualcosa di simile:

@Override 
public void afterTextChanged(Editable s) { 
    if (s.length() > 5) { 
     dialog.getButton(Dialog.BUTTON_POSITIVE).setEnabled(false); 
    } else { 
     dialog.getButton(Dialog.BUTTON_POSITIVE).setEnabled(true); 
    } 
} 

dove dialog è:

final AlertDialog dialog = builder.create();