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Android / Guides / Customize theme

Customize the viewer's theme

The document viewer can be customized by overriding the PDFTronAppTheme xml style in your project. For example:

<style name="PDFTronAppTheme" parent="PDFTronAppThemeBase">
	<!-- List of required attributes -->
	<item name="colorPrimary">@color/colorPrimary</item>
	<item name="colorPrimaryDark">@color/colorPrimaryDark</item>
	<item name="colorAccent">@color/colorAccent</item>
	<item name="actionMenuTextColor">@color/app_color_icon</item>
	<item name="drawerArrowStyle">@style/DrawerArrowStyle</item>
	<item name="actionModeBackground">?attr/colorPrimary</item>
	<item name="windowActionModeOverlay">true</item>
</style>

Note that the theme name must either exactly match PDFTronAppTheme or passed into ViewerBuilder2.usingTheme(int) and extend PDFTronAppTheme theme. If you cannot extend PDFTronAppTheme and is extending an AppCompat theme, then you will need to define custom theme attributes for the theme to work properly. Here are the custom attributes:

Attribute	Description
`pt_toolbar_theme`	Used to style the options menu toolbar. See `ToolbarTheme`.
`pt_toolbar_popup_style`	Used to style the popup menu in the toolbar. See `ToolbarPopupTheme`.
`pt_toolbar_style`	Used to style the options menu toolbar background. See `ToolbarStyle`.
`quick_menu_item`	Used to style the quick menu. See `QuickMenuItem`.
`custom_bookmarks_tab_layout`	Used to style the outline/user bookmark/annotation list dialog. See `BookmarksTabLayoutStyle`.
`pt_stamp_tab_layout_style`	Used to style the stamp dialog tab layout. See `StampTabLayoutStyle`.
`pt_bottom_bar_style`	Used to style the bottom navigation bar. See `PTBottomBarTheme`.
`pt_preset_bar_style`	Used to style the annotation preset bar. See `PTPresetBarTheme`.
`pt_annotation_toolbar_style`	Used to style the annotation toolbar. See `PTAnnotationToolbarTheme`.
`pt_toolbar_switcher_dialog_style`	Used to style the toolbar switcher popup dialog. See `PTToolbarSwitcherDialogTheme`.
`pt_toolbar_switcher_button_style`	Used to style the toolbar switcher menu button. See `PTToolbarSwitcherButtonTheme` .
`pt_toolbar_tab_action_button_style`	Used to style the tab action button. See `TabActionButtonTheme` .
`pt_document_slider_style`	Used to style the page slider. See `DocumentSliderStyle`.
`pt_pdf_tab_layout_style`	Used to style the document tabs. See `PdfTabLayoutStyle`.
`pt_floating_nav_style`	Used to style the floating action buttons. See `DefaultFloatingButtonNavStyle`.
`pt_sound_dialog_style`	Used to style the sound annotation dialog. See `SoundDialogStyle`.
`pt_page_indicator_style`	Used to style the page indicator. See `PageIndicatorTheme`.
`pt_sticky_note_dialog`	Used to style the sticky note dialog. See `DialogStickyNote`.
`pt_create_signature_dialog_style`	Used to style the signature creation dialog. See `CreateSignatureDialogTheme`.
`pt_menu_editor_dialog_style`	Used to style the toolbar editor dialog. See `MenuEditorDialogTheme`.
`pt_annot_style_dialog_style`	Used to style the annotation style dialog. See `AnnotStyleDialogTheme`.
`pt_annotation_filter_dialog_style`	Used to style the annotation filter dialog. See `AnnotationFilterDialogTheme`.
`pt_create_stamp_dialog_style`	Used to style the stamp creation dialog. See `CreateStampDialogTheme`.
`pt_add_page_dialog_style`	Used to style the add page dialog. See `AddPageDialogTheme`.
`pt_tab_switcher_dialog_style`	Used to style the tab switcher dialog. See `TabSwitcherDialogTheme`.
`pt_outline_dialog_style`	Used to style the outline dialog. See `OutlineDialogTheme`

Additionally if you are not using a NoActionBar theme AppCompat theme, you will need to add the additional attributes:

<style name="PDFTronAppTheme" parent="Theme.AppCompat.*">
    ...
    <!-- Action bar -->
    <item name="windowActionModeOverlay">true</item>
    <item name="windowActionBar">false</item>
    <item name="windowNoTitle">true</item>
</style>

Note, we highly recommend extend PDFTronAppTheme whenever possible.

Customize a component

Similarly, each component in the viewer can be customized separately depending on your design requirements. To do so, the styles of each component must be referenced in PDFTronAppTheme. For example:

<style name="PDFTronAppTheme" parent="PDFTronAppThemeBase">
	<!-- List of required attributes -->
	<item name="actionMenuTextColor">@color/app_color_icon</item>
	<item name="drawerArrowStyle">@style/DrawerArrowStyle</item>
	<item name="actionModeBackground">?attr/colorPrimary</item>
	<item name="windowActionModeOverlay">true</item>

	<!-- Custom annotation toolbar style (defined below) -->
	<item name="annotation_toolbar">@style/ToolbarButtonNavigationStyle</item>
</style>

<style name="CustomAnnotationToolbarStyle" parent="AnnotationToolbarStyle">
	<item name="colorToolBackground">@color/annotation_tool_background</item>
	<item name="colorToolIcon">@color/app_color_icon</item>
	<item name="colorCloseIcon">@color/app_color_icon</item>
</style>

Customizable components

For a full list of component styles available, please take a look at the default styles for PDFTronAppTheme in styles.xml of the Tools package.

A sample that uses styles to customize the document viewer can be found on our [GitHub repository](https://github.com/PDFTron/pdftron-android-samples/tree/master/CustomUI).

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