Add long click support

app/src/main/java/tellh/com/recyclertreeview/MainActivity.java

@@ -7,6 +7,7 @@
 import android.view.Menu;
 import android.view.MenuItem;
 import android.widget.ImageView;
+import android.widget.Toast;
 
 import java.util.ArrayList;
 import java.util.Arrays;
@@ -91,6 +92,25 @@ public void onToggle(boolean isExpand, RecyclerView.ViewHolder holder) {
                 ivArrow.animate().rotationBy(rotateDegree)
                         .start();
             }
+
+            @Override
+            public boolean onLongClick(TreeNode node, RecyclerView.ViewHolder holder) {
+                if (!node.isLeaf()) {
+                    //read name of dir
+                    Toast.makeText(
+                            MainActivity.this,
+                            "Long clicked: "+((Dir) node.getContent()).dirName,
+                            Toast.LENGTH_SHORT
+                    ).show();
+                } else {
+                    Toast.makeText(
+                            MainActivity.this,
+                            "Long clicked: "+ ((File) node.getContent()).fileName,
+                            Toast.LENGTH_SHORT
+                    ).show();
+                }
+                return true;
+            }
         });
         rv.setAdapter(adapter);
     }

build.gradle

@@ -3,6 +3,7 @@
 buildscript {
     repositories {
         jcenter()
+        google()
     }
     dependencies {
         //JitPack

recyclertreeview-lib/src/main/java/tellh/com/recyclertreeview_lib/TreeViewAdapter.java

@@ -1,5 +1,6 @@
 package tellh.com.recyclertreeview_lib;
 
+import android.app.Fragment;
 import android.os.Build;
 import android.os.Bundle;
 import android.support.annotation.NonNull;
@@ -119,6 +120,17 @@ public void onClick(View v) {
                 }
             }
         });
+
+        holder.itemView.setOnLongClickListener(new View.OnLongClickListener() {
+            @Override
+            public boolean onLongClick(View view) {
+                TreeNode selectedNode = displayNodes.get(holder.getLayoutPosition());
+                if (onTreeNodeListener != null && onTreeNodeListener.onLongClick(selectedNode, holder))
+                    return true;
+                return false;
+            }
+        });
+
         for (TreeViewBinder viewBinder : viewBinders) {
             if (viewBinder.getLayoutId() == displayNodes.get(position).getContent().getLayoutId())
                 viewBinder.bindView(holder, position, displayNodes.get(position));
@@ -190,6 +202,8 @@ public interface OnTreeNodeListener {
          * @param isExpand the status of TreeNodes after being toggled.
          */
         void onToggle(boolean isExpand, RecyclerView.ViewHolder holder);
+
+        boolean onLongClick(TreeNode node, RecyclerView.ViewHolder holder);
     }
 
     public void refresh(List<TreeNode> treeNodes) {