Question

您可能会猜到我是Android Studio的初学者。我试图在布局中放置import sys max = 5 for counter in range(max): # Input miles to be converted miles = float(input('Enter the number of miles to convert to kilometers:')) if miles >= 0: # May as well defer calculation of milesToKms until we know # the miles value is valid milesToKms = miles * 1.6 # miles to kilometers formula print('Miles converted:', miles) print('Kilometers:', milesToKms) #display kilometers result break else: # No need for elif miles < 0; anything not valid is invalid print('Invalid value entered.') else: # sys.exit is correct way to exit program, and it can output error for you sys.exit('Too many invalid entries submitted.')，这是我需要的BottomNavigationView，但似乎无法解决。这是我能做的最好的事情，但是SearchView仍然没有出现：

BottomNavigationView

如果有人有任何想法，我想得到一些帮助，谢谢！

编辑：这是活动-（我将xml的名称改名为activity_main.xml，以便可以使用绑定）

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

<RelativeLayout
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:orientation="horizontal">

    <android.support.v7.widget.SearchView
        android:id="@+id/search"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:clickable="true" />
    <ListView
        android:id="@+id/list_view"
        android:layout_width="fill_parent"
        android:layout_height="450dp"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true"
        android:layout_below="@+id/search" />


    <android.support.design.widget.BottomNavigationView
        android:id="@+id/navigation"
        menu="@menu/navigation"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:layout_gravity="bottom"
        android:background="?android:attr/windowBackground"
        />
</RelativeLayout>
</layout>

}

Answer 1

这是工作代码：

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="wrap_content">

    <android.support.v7.widget.SearchView
        android:id="@+id/search"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:clickable="true"
        android:focusable="true" />

    <ListView
        android:id="@+id/list_view"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_above="@+id/navigation"
        android:layout_below="@+id/search" />

    <android.support.design.widget.BottomNavigationView
        android:id="@+id/navigation"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:layout_gravity="bottom"
        android:background="?android:attr/windowBackground"
        app:menu="@menu/navigation" />
</RelativeLayout>

如何在<layout>内放置BottomNavigationView？

1 个答案: