Stay at top in the Nodes Dialog.

- Add a method to the Nodes Dialog in the Settings, so that the list of nodes always stays at the top and shows the best nodes.

app/src/main/java/cy/agorise/bitsybitshareswallet/fragments/ImportBrainkeyFragment.kt

@@ -10,9 +10,11 @@ import android.view.View
 import android.view.ViewGroup
 import androidx.appcompat.widget.Toolbar
 import androidx.navigation.Navigation
+import androidx.recyclerview.widget.LinearLayoutManager
 import com.afollestad.materialdialogs.MaterialDialog
 import com.afollestad.materialdialogs.callbacks.onDismiss
 import com.afollestad.materialdialogs.list.customListAdapter
+import com.afollestad.materialdialogs.list.getRecyclerView
 import com.afollestad.materialdialogs.list.listItemsSingleChoice
 import com.crashlytics.android.Crashlytics
 import com.jakewharton.rxbinding3.widget.textChanges
@@ -66,6 +68,9 @@ class ImportBrainkeyFragment : BaseAccountFragment() {
     /** Adapter that holds the FullNode list used in the Bitshares nodes modal */
     private var nodesAdapter: FullNodesAdapter? = null
 
+    // NodesDialog's RecyclerView LayoutManager used to always keep showing the first node of the list.
+    private var mNodesDialogLinearLayoutManager: LinearLayoutManager? = null
+
     /** Handler that will be used to make recurrent calls to get the latest BitShares block number*/
     private val mHandler = Handler()
 
@@ -144,6 +149,8 @@ class ImportBrainkeyFragment : BaseAccountFragment() {
                 .observeOn(AndroidSchedulers.mainThread())
                 .subscribe(
                     { fullNode ->
+                        mNodesDialogLinearLayoutManager?.scrollToPositionWithOffset(0, 0)
+
                         if (!fullNode.isRemoved)
                             nodesAdapter?.add(fullNode)
                         else
@@ -164,6 +171,8 @@ class ImportBrainkeyFragment : BaseAccountFragment() {
                 }
             }
 
+            mNodesDialogLinearLayoutManager = (mNodesDialog?.getRecyclerView()?.layoutManager as LinearLayoutManager)
+
             // Registering a recurrent task used to poll for dynamic global properties requests
             mHandler.post(mRequestDynamicGlobalPropertiesTask)
         }