add margin inbetween pages at the pdf viewer

Author: tibbi

app/build.gradle

@@ -65,7 +65,7 @@ android {
 
 dependencies {
     implementation 'com.github.SimpleMobileTools:Simple-Commons:b452494768'
-    implementation 'com.github.tibbi:PdfViewPager:dd7da8173c'
+    implementation 'com.github.tibbi:PdfViewPager:d2af24208d'
     implementation 'com.github.Stericson:RootTools:df729dcb13'
     implementation 'com.github.Stericson:RootShell:1.6'
     implementation 'com.alexvasilkov:gesture-views:2.5.2'

app/src/main/kotlin/com/simplemobiletools/filemanager/pro/activities/PDFViewerActivity.kt

@@ -9,6 +9,7 @@ import android.print.PrintManager
 import android.view.View
 import android.view.WindowManager
 import androidx.constraintlayout.widget.ConstraintLayout
+import androidx.viewpager2.widget.MarginPageTransformer
 import androidx.viewpager2.widget.ViewPager2
 import androidx.viewpager2.widget.ViewPager2.OnPageChangeCallback
 import com.simplemobiletools.commons.extensions.*
@@ -110,6 +111,7 @@ class PDFViewerActivity : SimpleActivity() {
 
         val errorHandler = PdfErrorHandler { throwable -> showErrorToast(throwable.toString()) }
 
+        pdf_viewer.setPageTransformer(MarginPageTransformer(resources.getDimension(R.dimen.activity_margin).toInt()))
         pdf_viewer.orientation = ViewPager2.ORIENTATION_VERTICAL
         pdf_viewer.adapter = PDFPagerAdapter(this, clickListener, errorHandler, uri.toString(), getProperBackgroundColor())
         pdf_viewer.registerOnPageChangeCallback(object : OnPageChangeCallback() {