带有自定义项目的底部导航视图(actionLayout)

时间:2017-03-07 16:57:42

标签: android android-view android-menu

我想在新的BottomNavigationView 中添加自定义项。

有很多关于使用普通导航视图添加自定义视图的教程,但我找不到有关底部视图的任何内容。

这是我的观点

   <android.support.design.widget.BottomNavigationView
        android:id="@+id/navigation_view"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        app:menu="@menu/menu_main" />

这是菜单

<?xml version="1.0" encoding="utf-8"?>
 <menu xmlns:android="http://schemas.android.com/apk/res/android">

<item
    android:id="@+id/menu_one"
    android:icon="@drawable/ic_tab_one"
    android:title="one" />
<item
    android:id="@+id/menu_two"
    app:actionLayout="@layout/item_action_notification"
    android:title="two" />

正如您所看到的那样,我会像正常情况一样放置 actionLayout 标记,但它根本就不会显示。

有什么想法吗?感谢。

1 个答案:

答案 0 :(得分:8)

希望以下解决方案有所帮助。

  1. 创建布局:布局/ _custom_cart_item_layout.xml

    <?xml version="1.0" encoding="utf-8"?>
    <FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent">
    
    <TextView
    android:id="@+id/cart_badge"
    android:layout_width="20dp"
    android:layout_height="20dp"
    android:layout_gravity="top|center_horizontal"
    android:layout_marginLeft="10dp"
    android:background="@drawable/circle"
    android:backgroundTint="@color/colorAccent"
    android:gravity="center"
    android:text="0"
    android:textColor="@android:color/white"
    android:textSize="12sp" />
    
    </FrameLayout>
    
  2. <强>抽拉/圆

    <?xml version="1.0" encoding="utf-8"?>
    <shape xmlns:android="http://schemas.android.com/apk/res/android" 
    android:shape="oval">
    <solid android:color="@color/white"/>
    <size android:width="40dp" android:height="40dp" />
    </shape>
    
  3. MainActivity: layout / main_activity.xml

    <?xml version="1.0" encoding="utf-8"?>
    <android.support.constraint.ConstraintLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="com.MainActivity">
    
    <android.support.design.widget.BottomNavigationView
    android:id="@+id/bot_nav"
    android:layout_width="0dp"
    android:layout_height="56dp"
    android:background="@color/white"
    android:elevation="2dp"
    app:layout_constraintBottom_toBottomOf="parent"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintStart_toStartOf="parent"
    app:menu="@menu/bottom_menu" />
    
    </android.support.constraint.ConstraintLayout>
    
  4. 菜单: menu / bottom_menu.xml

    <?xml version="1.0" encoding="utf-8"?>
    <menu xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:android="http://schemas.android.com/apk/res/android">
    
    <item
    android:id="@+id/menu_home"
    android:icon="@drawable/home24"
    android:title="Home" />
    
    <item
    android:id="@+id/menu_cart"
    android:icon="@drawable/shoppingcart24"
    android:title="Cart" />
    <item
    android:id="@+id/menu_acct"
    android:icon="@drawable/user24"
    android:title="Account" />
    </menu>
    
  5. onCreate

    中的MainActivity类中
    BottomNavigationView mbottomNavigationView =findViewById(R.id.bot_nav);
    
    BottomNavigationMenuView mbottomNavigationMenuView =
    (BottomNavigationMenuView) mbottomNavigationView.getChildAt(0);
    
    View view = mbottomNavigationMenuView.getChildAt(1);
    
    BottomNavigationItemView itemView = (BottomNavigationItemView) view;
    
    View cart_badge = LayoutInflater.from(this)
    .inflate(R.layout._custom_cart_item_layout,
     mbottomNavigationMenuView, false);
    
    itemView.addView(cart_badge);
    
  6. Output : Image

    希望它能为你起作用。

    谢谢