fix: user login; refactor: move package widget to package ui

common/src/main/java/com/stardust/util/DrawerAutoClose.java

@@ -0,0 +1,30 @@
+package com.stardust.util;
+
+import android.app.Activity;
+import android.support.v4.widget.DrawerLayout;
+
+import com.stardust.util.BackPressedHandler;
+
+/**
+ * Created by Stardust on 2017/6/19.
+ */
+
+public class DrawerAutoClose implements BackPressedHandler {
+
+    private DrawerLayout mDrawerLayout;
+    private int mGravity;
+
+    public DrawerAutoClose(DrawerLayout drawerLayout, int gravity){
+        mDrawerLayout = drawerLayout;
+        mGravity = gravity;
+    }
+
+    @Override
+    public boolean onBackPressed(Activity activity) {
+        if (mDrawerLayout.isDrawerOpen(mGravity)) {
+            mDrawerLayout.closeDrawer(mGravity);
+            return true;
+        }
+        return false;
+    }
+}