fix: prevent snackbars from overlapping the bottom bar on Android versions below 15

Signed-off-by: Jorge Aguado Recio <jaguado@izertis.com>

Author: joragua

owncloudApp/src/main/java/com/owncloud/android/extensions/FragmentExt.kt

@@ -49,9 +49,12 @@ fun Fragment.showMessageInSnackbar(
     duration: Int = Snackbar.LENGTH_LONG,
     attachedToBottomBar: Boolean = false
 ) {
-    val requiredView = view?.rootView ?: return
+    val requiredView = view ?: return
     val snackbar = Snackbar.make(requiredView, message, duration)
-    if (attachedToBottomBar) { snackbar.setAnchorView(requiredView.findViewById(R.id.bottom_nav_view)) }
+    if (attachedToBottomBar) {
+        val rootView = view?.rootView ?: return
+        snackbar.setAnchorView(rootView.findViewById(R.id.bottom_nav_view))
+    }
     snackbar.show()
 }
 
@@ -61,7 +64,7 @@ fun Fragment.showSnackbarWithAction(
     action: () -> Unit,
     duration: Int = Snackbar.LENGTH_LONG
 ) {
-    val requiredView = view?.rootView ?: return
+    val requiredView = view ?: return
     Snackbar.make(requiredView, message, duration)
         .setAction(actionText) { action() }
         .show()