当我在android中滚动内容时如何隐藏ToolBar

当我用内容滚动文本和图像时,我试图隐藏我的工具栏,
在这里我使用scrollView获取滚动内容时,当我滚动内容如何隐藏工具栏时,请任何人告诉我如何获取

这是我的XMl代码

content_main.XML

<android.support.v4.widget.NestedScrollView
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent"
xmlns:android="http://schemas.android.com/apk/res/android"
app:layout_behavior="@string/appbar_scrolling_view_behavior">


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

<LinearLayout
    android:paddingTop="?android:attr/actionBarSize"
    android:orientation="vertical"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <TextView
        android:layout_marginLeft="10dp"
        android:layout_marginRight="10dp"
        android:id="@+id/textone"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:textSize="23dp"
        android:textStyle="bold"
        android:text="hello world jheds sdjhs jds sjbs skjs ksjs kksjs ksj sdd dskd js sk "/>

    <ImageView
        android:id="@+id/imge"
        android:layout_width="match_parent"
        android:layout_height="250dp"
        android:src="@drawable/imag_bg"/>


    <TextView
        android:id="@+id/texttwo"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_marginLeft="10dp"
        android:layout_marginRight="10dp"
        android:text="Pretty good, the Toolbar is moving along with the list and getting back just as we expect it to. This is thanks to the restrictions that we put on the mToolbarOffset variable.
        If we would omit checking if it’s bigger than 0 and lower than mToolbarHeight then when
        we would scroll
         up our list, the Toolbar would move along far away off the screen, so to show it back you
         would have to scroll the list down to 0. Right now it just scrolls up to mToolbarHeight
         position and not more so it’s “sitting” right above the list all of the time and if we
         start scrolling down, we can see it immediately showing.



          up our list, the Toolbar would move along far away off the screen, so to show it back you
         would have to scroll the list down to 0. Right now it just scrolls up to mToolbarHeight
         position and not more so it’s “sitting” right above the list all of the time and if we
         start scrolling down, we can see it immediately showing

          up our list, the Toolbar would move along far away off the screen, so to show it back you
         would have to scroll the list down to 0. Right now it just scrolls up to mToolbarHeight
         position and not more so it’s “sitting” right above the list all of the time and if we
         start scrolling down, we can see it immediately showing

          up our list, the Toolbar would move along far away off the screen, so to show it back you
         would have to scroll the list down to 0. Right now it just scrolls up to mToolbarHeight
         position and not more so it’s “sitting” right above the list all of the time and if we
         start scrolling down, we can see it immediately showing

          up our list, the Toolbar would move along far away off the screen, so to show it back you
         would have to scroll the list down to 0. Right now it just scrolls up to mToolbarHeight
         position and not more so it’s “sitting” right above the list all of the time and if we
         start scrolling down, we can see it immediately showing

          up our list, the Toolbar would move along far away off the screen, so to show it back you
         would have to scroll the list down to 0. Right now it just scrolls up to mToolbarHeight
         position and not more so it’s “sitting” right above the list all of the time and if we
         start scrolling down, we can see it immediately showing
        It works pretty well, but this is not what we want. It feels weird that you can
        stop it in the middle of
        the

         scroll and the Toolbar will stay half visible. Actually this is how it’s done in Google Play
         Games app
        which I consider as a bug

        It works pretty well, but this is not what we want. It feels weird that you can
        stop it in the middle of
        the
         scroll and the Toolbar will stay half visible. Actually this is how it’s done in Google Play
         Games app
        which I consider as a bug
        It works pretty well, but this is not what we want. It feels weird that you can
        stop it in the middle of
        the
         scroll and the Toolbar will stay half visible. Actually this is how it’s done in Google Play
         Games app
        which I consider as a bug."/>




</LinearLayout>

<View
    android:layout_width="wrap_content"
    android:layout_height="30dp" />
<LinearLayout

    android:layout_width="match_parent"
    android:layout_height="match_parent">
    <Button
         android:text="hai"
         android:layout_width="160dp"
         android:layout_height="match_parent" />
    <Button
         android:text="hello"
         android:layout_width="160dp"
         android:layout_height="match_parent" />


</LinearLayout>

activity_main.xml中

<android.support.design.widget.AppBarLayout
    android:layout_height="wrap_content"
    android:layout_width="match_parent" 
    android:theme="@style/AppTheme.AppBarOverlay">

    <android.support.v7.widget.Toolbar 
        android:id="@+id/toolbar"
        android:layout_width="match_parent" 
        android:layout_height="?attr/actionBarSize"
        android:background="?attr/colorPrimary" 
        app:popupTheme="@style/AppTheme.PopupOverlay" />

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

<include layout="@layout/content_main" />

你必须在你的两个布局中做很多改变.首先在activity_main.XML中使用CoordinatorLayout,如下所示(根据您的要求更改主题).

<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:id="@+id/main_content"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:fitsSystemWindows="true">

    <android.support.design.widget.AppBarLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar">

        <android.support.v7.widget.Toolbar
            android:id="@+id/toolbar"
            android:layout_width="match_parent"
            android:layout_height="?attr/actionBarSize"
            android:background="?attr/colorPrimary"
            android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar"
            app:layout_scrollFlags="scroll|enterAlways"
            app:popupTheme="@style/ThemeOverlay.AppCompat.Light" />

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

    <include layout="@layout/content_main" />

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

在content_main.XML中使用android.support.v4.widget.NestedScrollView而不是ScrollView.

也可以在android.support.v4.widget.NestedScrollView中使用app：layout_behavior =“@ string / appbar_scrolling_view_behavior”,如下所示.

<android.support.v4.widget.NestedScrollView
        xmlns:app="http://schemas.android.com/apk/res-auto"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        xmlns:android="http://schemas.android.com/apk/res/android" 
        app:layout_behavior="@string/appbar_scrolling_view_behavior">

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

            <TextView
                android:id="@+id/textone"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:text="hello world jheds sdjhs jds sjbs skjs ksjs kksjs ksj sdd dskd js sk "
                android:textSize="25dp"
                android:textStyle="bold" />

            /// Add your other code here

            </LinearLayout>

    </android.support.v4.widget.NestedScrollView>