Step-1
In order to support RTL in your app, you first need to add android:supportsRtl="true" to the element in your manifest file.
Step-2
Add RTL support in SlidingPaneLayout
android:layoutDirection="rtl"
Step-3
Add LTR support in child views of SlidingPaneLayout
android:layoutDirection="ltr"
<SlidingPane
android:id="@+id/slidingPanelLayout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layoutDirection="rtl">
<include
layout="@layout/left_drawer"
android:layout_width="250dp"
android:layout_height="match_parent"
android:layoutDirection="ltr" />
<include
layout="@layout/view_container"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layoutDirection="ltr"
/>
</SlidingPane>
Note: add LTR support in both left_drawer.xml, view_container.xml