Realtime collaboration customization in Xamarin.Android

All UI components in the real-time annotation reply interface can be customized using Android styles defined in Resources/values/styles.xml. You can extend ReplyBaseTheme.DayNight and override the inherited attributes to change the look of your reply UI. A description of each color attribute used in ReplyBaseTheme.DayNight is summarized below.

<resources>
    <!-- Custom theme used by the reply UI components -->
    <style name="MyCustomReplyTheme" parent="ReplyBaseTheme.DayNight">
        <item name="replyColorBackgroundPrimary">#202D3D</item>
        <item name="replyColorBackgroundSecondary">#151e29</item>
        <item name="replyIconColor">#9dd8ff</item>
        <item name="replyDividerColor">#151e29</item>
        <item name="replyEditorSendButtonColor">#9dd8ff</item>
        <item name="replyEditorSendButtonDisabledColor">#999dd8ff</item>
        <item name="replyEditorCancelButtonColor">#ff5722</item>
        <item name="android:textColorPrimary">#FFFFFF</item>
        <item name="android:textColorSecondary">#C9C9C9</item>
    </style>
    ...
</resources>

then you can use this theme by specifying it in your activity's theme using the replyTheme attribute:

<resources>
    <!-- Style used by the activity containing the collaboration viewer Fragment-->
    <style name="PDFTronAppTheme" parent="PDFTronAppThemeBase">
        ...
        <!-- Specify your custom reply theme with the replyTheme attribute -->
        <item name="replyTheme">@style/MyCustomReplyTheme</item>
    </style>
    ...
</resources>

This theme will look something like this:

Below is a list of all available color and size attributes used by the annotation reply UI.

Each view in the reply UI can be further customized by individually specifying its style. Default styles are used by each view, and you can extend and override them in your reply theme.

Here is a list of default styles used by each view in the reply interface.

If you would like to use a custom viewer fragment, you can extend the CollabViewerTabHostFragment2 or CollabViewerTabFragment2 class and pass in your custom classes to CollabViewerBuilder2.

public CollabViewerTabHostFragment2 CreateCustomViewerFragment(AppCompatActivity activity,
        Uri fileUri, ViewerConfig viewerConfig) {
    return CollabViewerBuilder2.WithUri(fileUri)
            .UsingConfig(viewerConfig)
            .UsingTabClass(Java.Lang.Class.FromType(typeof(MyCustomTabFragment))) // Specify your custom tab viewer
            .Build(activity, Java.Lang.Class.FromType(typeof(MyCustomTabHostFragment))); // Specify your custom tab host viewer
}