Question

我在空白活动（Android Studio）上创建了一个完整的项目。我想添加导航抽屉而不妨碍我以前的代码。有没有办法在空白活动中添加导航抽屉，如果有，请做指导。

Answer 1

步骤1：在xml文件中包含导航视图，该文件将在创建时由yor活动充气。

<?xml version="1.0" encoding="utf-8"?>

<include
    layout="@layout/app_bar_main"
    android:layout_width="match_parent"
    android:layout_height="match_parent" />

<android.support.design.widget.NavigationView
    android:id="@+id/nav_view"
    android:layout_width="wrap_content"
    android:layout_height="match_parent"
    android:layout_gravity="start"
    android:fitsSystemWindows="true"
    app:headerLayout="@layout/nav_header_main"
    app:menu="@menu/activity_main_drawer" />

第2步：初始化视图

 private NavigationView navigationView;
private DrawerLayout drawer;

第3步：将事件发送到抽屉关闭并打开

ActionBarDrawerToggle actionBarDrawerToggle = new ActionBarDrawerToggle(this, drawer, toolbar, R.string.openDrawer, R.string.closeDrawer) {

        @Override
        public void onDrawerClosed(View drawerView) {
            // Code here will be triggered once the drawer closes as we dont want anything to happen so we leave this blank
            super.onDrawerClosed(drawerView);
        }

        @Override
        public void onDrawerOpened(View drawerView) {
            // Code here will be triggered once the drawer open as we dont want anything to happen so we leave this blank
            super.onDrawerOpened(drawerView);
        }
    };

    //Setting the actionbarToggle to drawer layout
    drawer.setDrawerListener(actionBarDrawerToggle);

    //calling sync state is necessary or else your hamburger icon wont show up
    actionBarDrawerToggle.syncState();
}

希望这有助于设置导航抽屉。

将导航抽屉添加到空白活动

2 个答案: