title: Coloured Background of Action Button in Sweet Alert (Android)
body: <p>I have written some code for showing a Dialog box using sweet alert library. It's a very popular library and contains couple of awesome features which are very useful for designing purpose and developing purpose as well. So please help to change the background color of Action button which are present at the bottom of the dialog box. </p>
  
  <p>I am attaching the screen shot and as well as code. Please help me to fix this issue. </p>
  
  <p>I only want to change the background color of Action Button. </p>
  
  <pre><code> MaterialDialog.Builder builder = new MaterialDialog.Builder(SignInActivity.this)
                                       .title("Sign Up")
                                       .titleColor(Color.BLACK)
                                       .customView(R.layout.custom_dialog_sign_up, true)
                                       .positiveText("Submit")
                                       .negativeText("Cancel")
                                       .positiveColorRes(R.color.black_color)
                                       .negativeColorRes(R.color.gray_btn_bg_color)
                                       .canceledOnTouchOutside(false)
                                       .autoDismiss(false);
  
      final MaterialDialog materialDialog = builder.build();
  
      materialDialog.show(); 
  </code></pre>