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。
答案 0 :(得分:8)
希望以下解决方案有所帮助。
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>
<强>抽拉/圆强>
<?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>
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>
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>
在 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);
希望它能为你起作用。
谢谢