Add setSensitivity method.

Author: Issac

library/src/main/java/me/imid/swipebacklayout/lib/SwipeBackLayout.java

@@ -154,7 +154,17 @@ public SwipeBackLayout(Context context, AttributeSet attrs, int defStyle) {
         final float density = getResources().getDisplayMetrics().density;
         final float minVel = MIN_FLING_VELOCITY * density;
         mDragHelper.setMinVelocity(minVel);
+    }
 
+    /**
+     * Sets the sensitivity of the NavigationLayout.
+     * 
+     * @param context The application context.
+     * @param sensitivity value between 0 and 1, the final value for touchSlop =
+     *            ViewConfiguration.getScaledTouchSlop * (1 / s);
+     */
+    public void setSensitivity(Context context, float sensitivity) {
+        mDragHelper.setSensitivity(context, sensitivity);
     }
 
     /**

library/src/main/java/me/imid/swipebacklayout/lib/ViewDragHelper.java

@@ -425,6 +425,19 @@ private ViewDragHelper(Context context, ViewGroup forParent, Callback cb) {
         mScroller = ScrollerCompat.create(context, sInterpolator);
     }
 
+    /**
+     * Sets the sensitivity of the dragger.
+     * 
+     * @param context The application context.
+     * @param sensitivity value between 0 and 1, the final value for touchSlop =
+     *            ViewConfiguration.getScaledTouchSlop * (1 / s);
+     */
+    public void setSensitivity(Context context, float sensitivity) {
+        float s = Math.max(0f, Math.min(1.0f, sensitivity));
+        ViewConfiguration viewConfiguration = ViewConfiguration.get(context);
+        mTouchSlop = (int) (viewConfiguration.getScaledTouchSlop() * (1 / s));
+    }
+
     /**
      * Set the minimum velocity that will be detected as having a magnitude
      * greater than zero in pixels per second. Callback methods accepting a