add a Floating Action Button for creating files/directories

app/build.gradle

@@ -25,6 +25,7 @@ dependencies {
     testCompile 'junit:junit:4.12'
     compile 'com.android.support:appcompat-v7:23.4.0'
     compile 'com.jakewharton:butterknife:8.0.1'
+    compile 'com.android.support:design:23.4.0'
 
     apt 'com.jakewharton:butterknife-compiler:8.0.1'
 }

app/src/main/java/com/simplemobiletools/filemanager/fragments/ItemsFragment.java

@@ -27,6 +27,7 @@ import java.util.List;
 
 import butterknife.BindView;
 import butterknife.ButterKnife;
+import butterknife.OnClick;
 
 public class ItemsFragment extends android.support.v4.app.Fragment
         implements AdapterView.OnItemClickListener, SwipeRefreshLayout.OnRefreshListener {
@@ -35,6 +36,7 @@ public class ItemsFragment extends android.support.v4.app.Fragment
 
     private List<FileDirItem> mItems;
     private ItemInteractionListener mListener;
+
     private boolean mShowHidden;
 
     @Nullable
@@ -131,6 +133,11 @@ public class ItemsFragment extends android.support.v4.app.Fragment
         }
     }
 
+    @OnClick(R.id.items_fab)
+    public void fabClicked(View view) {
+
+    }
+
     @Override
     public void onRefresh() {
         fillItems();

app/src/main/res/layout/items_fragment.xml

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
-<RelativeLayout
-    android:id="@+id/items_holder"
+<android.support.design.widget.CoordinatorLayout
+    android:id="@+id/item_holder"
     xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
     android:layout_height="match_parent">
@@ -17,4 +17,12 @@
             android:clipToPadding="false"
             android:paddingLeft="@dimen/activity_margin"/>
     </android.support.v4.widget.SwipeRefreshLayout>
-</RelativeLayout>
+
+    <android.support.design.widget.FloatingActionButton
+        android:id="@+id/items_fab"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_gravity="bottom|end"
+        android:layout_margin="@dimen/activity_margin"
+        android:src="@mipmap/plus"/>
+</android.support.design.widget.CoordinatorLayout>