我对可扩展布局（https://android-arsenal.com/details/1/2456）有疑问。 当应用程序启动时，片段被插入@id（flContent），ExpandableRelativeLayout被折叠（因为app：ael_expanded =＆＃34; false＆＃34;）我可以通过点击@id / cerca_button_advanced展开和折叠它。 当使用NavigationView中的菜单加载另一个片段然后再加载第一个片段时，ExpandableRelativeLayout仍然会展开。 为什么它仍然会扩展，即使app：ael_expanded =＆＃34; false＆＃34;？我希望有人可以帮助我...
这是activity_main.xml
<!-- This DrawerLayout has two children at the root -->
<android.support.v4.widget.DrawerLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="@+id/drawer_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true">
<!-- This LinearLayout represents the contents of the screen -->
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<!-- The ActionBar displayed at the top -->
<include
layout="@layout/toolbar"
android:layout_width="match_parent"
android:layout_height="wrap_content"/>
<!-- The main content view where fragments are loaded -->
<FrameLayout
android:id="@+id/flContent"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
</LinearLayout>
<!-- The navigation drawer that comes from the left -->
<!-- Note that `android:layout_gravity` needs to be set to 'start' -->
<android.support.design.widget.NavigationView
android:id="@+id/nvView"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_gravity="start"
android:background="@android:color/white"
app:headerLayout="@layout/nav_header"
app:menu="@menu/drawer_view"/>
</android.support.v4.widget.DrawerLayout>
这是在@ id / flContent
中插入的fragment.xml<ScrollView
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<android.support.v7.widget.CardView
xmlns:card_view="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="5dp"
android:layout_marginEnd="5dp"
android:layout_marginStart="5dp"
android:layout_marginTop="5dp"
card_view:cardElevation="2dp">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:padding="5dp">
<TableLayout
android:id="@+id/cerca_tabella"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:shrinkColumns="1"
android:stretchColumns="1">
<TableRow
android:layout_width="match_parent"
android:layout_height="wrap_content">
<TextView
android:id="@+id/cerca_testo_nome"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:labelFor="@+id/cerca_input_nome"
android:text="@string/cerca_descrizione_nome"/>
<EditText
android:id="@+id/cerca_input_nome"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="15dp"
android:inputType="textNoSuggestions|textCapSentences|text"/>
</TableRow>
<TableRow
android:layout_width="match_parent"
android:layout_height="wrap_content">
<TextView
android:id="@+id/cerca_testo_via"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:labelFor="@+id/cerca_input_via"
android:text="@string/cerca_descrizione_indirizzo"/>
<EditText
android:id="@+id/cerca_input_via"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="15dp"
android:inputType="textNoSuggestions|text|textPostalAddress"/>
</TableRow>
<TableRow
android:layout_width="match_parent"
android:layout_height="wrap_content">
<TextView
android:id="@+id/cerca_testo_citta"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:labelFor="@+id/cerca_input_citta"
android:text="@string/cerca_descrizione_citta"/>
<Spinner
android:id="@+id/cerca_spinner_citta"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="15dp"
android:entries="@array/cerca_citta"/>
</TableRow>
</TableLayout>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="10dp">
<RelativeLayout
android:id="@+id/cerca_button_advanced"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<View
android:id="@+id/cerca_button_advance_logo"
android:layout_width="14dp"
android:layout_height="14dp"
android:layout_alignParentStart="true"
android:layout_marginEnd="5dp"
android:layout_marginStart="5dp"
android:background="@drawable/triangolo"
/>
<TextView
android:id="@+id/cerca_button_advance_text"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBottom="@+id/cerca_button_advance_logo"
android:layout_toEndOf="@+id/cerca_button_advance_logo"
android:text="Advanced"
/>
</RelativeLayout>
<com.github.aakira.expandablelayout.ExpandableRelativeLayout
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="@+id/expandable_layout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="@+id/cerca_button_advanced"
app:ael_duration="500"
app:ael_expanded="false"
app:ael_interpolator="decelerate"
app:ael_orientation="vertical">
<Switch
android:id="@+id/switch1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="New Switch 1"/>
<Switch
android:id="@+id/switch2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@id/switch1"
android:text="New Switch 2"/>
</com.github.aakira.expandablelayout.ExpandableRelativeLayout>
</RelativeLayout>
</LinearLayout>
</android.support.v7.widget.CardView>
<my.AdapterLinearLayout
android:id="@+id/cerca_linearLayout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"
android:orientation="vertical"/>
</LinearLayout>
</ScrollView>