title: Android disable positive button on some condion in addTextChangedListener (editext)
body: <p>Here is my code for a dialog, I want to disable positive button if text size in edit-text  in greater than 5 and enable it if size &lt;= 5</p>
  
  <pre><code>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();
  
          }
  </code></pre>