android - 单一布局中的 BottomNavigationBar、Fab Button 和 ActionBar

Question

我想让我的 MainActivity 布局像这样 顶部的白色条是 NotificationBar。灰色条是 ActionBar。中间的白色内容是我要放置我的 fragment 的地方(使用Bottombar进行选择)

这是我的布局文件。在我的设备上安装应用程序后，工具栏隐藏在通知栏后面。我应该做哪些改变才能让它发挥作用？

<LinearLayout 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="match_parent"
android:orientation="vertical">

<android.support.v7.widget.Toolbar
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:gravity="top"
    android:foregroundGravity="top"
    android:layout_gravity="top"
    android:background="@color/colorPrimary"
    android:id="@+id/toolbar">

</android.support.v7.widget.Toolbar>

<FrameLayout
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:layout_weight="1">


    <FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
        android:id="@+id/fragment_container"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />

    <android.support.design.widget.FloatingActionButton
        android:id="@+id/fab"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="end|bottom"
        app:useCompatPadding="true"
        android:src="@drawable/ic_add_dark" />

</FrameLayout>

<com.roughike.bottombar.BottomBar
    android:id="@+id/bottomBar"
    android:layout_width="match_parent"
    android:layout_height="56dp"
    android:gravity="bottom"
    android:foregroundGravity="bottom"
    android:layout_gravity="bottom"
    app:bb_tabXmlResource="@xml/bottombar_tabs"
    app:bb_inActiveTabAlpha="0.6"
    app:bb_inActiveTabColor="#ffffff"
    app:bb_activeTabColor="#ffffff"
    app:bb_behavior="shifting|underNavbar"/>

Answer 1

试试这个 xml 代码。

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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="match_parent"
    android:orientation="vertical">

    <android.support.v7.widget.Toolbar
        android:id="@+id/toolbar"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_gravity="top"
        android:background="@color/gray"
        android:foregroundGravity="top"
        android:gravity="top">

    </android.support.v7.widget.Toolbar>

    <FrameLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_weight="1">


        <FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
            android:id="@+id/fragment_container"
            android:layout_width="match_parent"
            android:layout_height="match_parent" />

        <android.support.design.widget.FloatingActionButton
            android:id="@+id/fab"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="end|bottom"
            android:backgroundTint="@color/orange"
            android:src="@drawable/ic_add_black_24dp"
            app:fabSize="normal"
            app:useCompatPadding="true" />

    </FrameLayout>

    <!--<com.roughike.bottombar.BottomBar-->
    <!--android:id="@+id/bottomBar"-->
    <!--android:layout_width="match_parent"-->
    <!--android:layout_height="56dp"-->
    <!--android:gravity="bottom"-->
    <!--android:foregroundGravity="bottom"-->
    <!--android:layout_gravity="bottom"-->
    <!--app:bb_tabXmlResource="@xml/bottombar_tabs"-->
    <!--app:bb_inActiveTabAlpha="0.6"-->
    <!--app:bb_inActiveTabColor="#ffffff"-->
    <!--app:bb_activeTabColor="#ffffff"-->
    <!--app:bb_behavior="shifting|underNavbar"/>-->

    <android.support.design.widget.BottomNavigationView
        android:layout_width="match_parent"
        android:layout_height="56dp"
        android:background="@color/green"
        app:itemIconTint="@color/white"
        app:itemTextColor="@color/white"
        app:menu="@menu/main">


    </android.support.design.widget.BottomNavigationView>

    </LinearLayout>

底部导航 View 助手类:

public class BottomNavigationViewHelper {
    public static void disableShiftMode(BottomNavigationView view) {
        BottomNavigationMenuView menuView = (BottomNavigationMenuView) view.getChildAt(0);
        try {
            Field shiftingMode = menuView.getClass().getDeclaredField("mShiftingMode");
            shiftingMode.setAccessible(true);
            shiftingMode.setBoolean(menuView, false);
            shiftingMode.setAccessible(false);
            for (int i = 0; i < menuView.getChildCount(); i++) {
                BottomNavigationItemView item = (BottomNavigationItemView) menuView.getChildAt(i);
                //noinspection RestrictedApi
                item.setShiftingMode(false);
                // set once again checked value, so view will be updated
                //noinspection RestrictedApi
                item.setChecked(item.getItemData().isChecked());
            }
        } catch (NoSuchFieldException e) {
            Log.e("BNVHelper", "Unable to get shift mode field", e);
        } catch (IllegalAccessException e) {
            Log.e("BNVHelper", "Unable to change value of shift mode", e);
        }
    }
}

在java文件中

 BottomNavigationView bnav = (BottomNavigationView) findViewById(R.id.bottomnav);
       BottomNavigationViewHelper.disableShiftMode(bnav);