android_alert_dialog.md

Material Design - Change button color in default Alert Dialog

Generally, all the widgets in an android app adhere to the colorPrimary value defined in the colors.xml file. So if we were to define an AlertDialog in the app, the text and the button color etc, will be the same as what is defined in the colorPrimary.

But I had a requirement recently where the primary color of the app was white but the alert Dialog button color needed to be different.

• First define a new style in the styles.xml file.

  <style name="AlertDialogTheme" parent="Theme.AppCompat.Light.Dialog.Alert">
        <item name="colorPrimary">@color/colorPrimary</item>
  </style>
  

• Now when creating a new AlertDialog we can define the theme of the dialog:

  new AlertDialog.Builder(this, R.style.AlertDialogTheme)
    .setTitle("Alert Dialog Title")
    .setMessage("Alert Dialog Message")
    .setPositiveButton("Click ME", (dialogInterface, i) -> {
                    
  }).show();