Add syntax highlighting to README

Author: justasm

README.md

@@ -18,7 +18,9 @@ Usage
 -----
 Add it to your project using Gradle:
 
-    compile 'com.jmedeisis:draglinearlayout:1.0.1'
+```groovy
+compile 'com.jmedeisis:draglinearlayout:1.0.1'
+```
 
 The `DragLinearLayout` can be used in place of any `LinearLayout`. However, by default, children
 will not be draggable. To set an existing `View` as draggable, use
@@ -27,60 +29,68 @@ will not be draggable. To set an existing `View` as draggable, use
 
 XML layout file:
 
-    <com.jmedeisis.draglinearlayout.DragLinearLayout
-        xmlns:android="http://schemas.android.com/apk/res/android"
-        android:id="@+id/container"
+```xml
+<com.jmedeisis.draglinearlayout.DragLinearLayout
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    android:id="@+id/container"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent" >
+
+    <TextView
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:text="@string/text" />
+
+    <ImageView
+        android:layout_width="match_parent"
+        android:layout_height="120dp"
+        android:scaleType="centerCrop"
+        android:src="@drawable/image"/>
+
+    <Button
+        android:id="@+id/button"
         android:layout_width="match_parent"
-        android:layout_height="match_parent" >
-    
-        <TextView
-            android:layout_width="match_parent"
-            android:layout_height="wrap_content"
-            android:text="@string/text" />
-    
-        <ImageView
-            android:layout_width="match_parent"
-            android:layout_height="120dp"
-            android:scaleType="centerCrop"
-            android:src="@drawable/image"/>
-    
-        <Button
-            android:id="@+id/button"
-            android:layout_width="match_parent"
-            android:layout_height="wrap_content"
-            android:text="@string/button_text"/>
-            
-    </com.jmedeisis.draglinearlayout.DragLinearLayout>
-    
+        android:layout_height="wrap_content"
+        android:text="@string/button_text"/>
+        
+</com.jmedeisis.draglinearlayout.DragLinearLayout>
+```
+
 Enabling drag & swap for all child views:
 
-    DragLinearLayout dragLinearLayout = (DragLinearLayout) findViewById(R.id.container);
-    for(int i = 0; i < dragLinearLayout.getChildCount(); i++){
-        View child = dragLinearLayout.getChildAt(i);
-        // the child will act as its own drag handle
-        dragLinearLayout.setViewDraggable(child, child);
-    }
+```java
+DragLinearLayout dragLinearLayout = (DragLinearLayout) findViewById(R.id.container);
+for(int i = 0; i < dragLinearLayout.getChildCount(); i++){
+    View child = dragLinearLayout.getChildAt(i);
+    // the child will act as its own drag handle
+    dragLinearLayout.setViewDraggable(child, child);
+}
+```
 
 Use `#addDragView(View, View)`,`#addDragView(View, View, int)` and `#removeDragView(View)` to
 manage draggable children dynamically:
 
-    final View view = View.inflate(context, R.layout.view_layout, null);
-    dragLinearLayout.addDragView(view, view.findViewById(R.id.view_drag_handle));
-    
-    // ..
-    
-    dragLinearLayout.removeDragView(view);
+```java
+final View view = View.inflate(context, R.layout.view_layout, null);
+dragLinearLayout.addDragView(view, view.findViewById(R.id.view_drag_handle));
+
+// ..
+
+dragLinearLayout.removeDragView(view);
+```
 
 Attach an `OnViewSwapListener` with `#setOnViewSwapListener(OnViewSwapListener)` to detect changes
 to the ordering of child `View`s:
 
-    dragLinearLayout.setOnViewSwapListener(new DragLinearLayout.OnViewSwapListener() {
-        @Override
-        public void onSwap(View firstView, int firstPosition,
-                View secondView, int secondPosition) {
-            // update data, etc..
-        }
-    });
+```java
+dragLinearLayout.setOnViewSwapListener(new DragLinearLayout.OnViewSwapListener() {
+    @Override
+    public void onSwap(View firstView, int firstPosition,
+            View secondView, int secondPosition) {
+        // update data, etc..
+    }
+});
+```
 
 When placing the `DragLinearLayout` inside a `ScrollView`, call `#setContainerScrollView(ScrollView)`
 to enable the user to scroll while dragging a child view.