Visualização da gaveta de navegação padrão para ExpandableListView
No Android Studio 2.1.2, se eu criar uma atividade de navegação padrão, recebo esta visualização:
Que usa o seguinteactivity_main.xml
Arquivo:
<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.widget.DrawerLayout 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:id="@+id/drawer_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
tools:openDrawer="start">
<include
layout="@layout/app_bar_main"
android:layout_width="match_parent"
android:layout_height="match_parent" />
<android.support.design.widget.NavigationView
android:id="@+id/nav_view"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_gravity="start"
android:fitsSystemWindows="true"
app:headerLayout="@layout/nav_header_main"
app:menu="@menu/activity_main_drawer" />
</android.support.v4.widget.DrawerLayout>
Como você pode ver<android.support.design.widget.NavigationView/>
usaapp:menu="@menu/activity_main_drawer"
para exibir a lista de menus definidos emactivity_main_drawer.xml
arquivo da seguinte maneira:
<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android">
<group android:checkableBehavior="single">
<item
android:id="@+id/nav_camera"
android:icon="@drawable/ic_menu_camera"
android:title="Import" />
<item
android:id="@+id/nav_gallery"
android:icon="@drawable/ic_menu_gallery"
android:title="Gallery" />
<item
android:id="@+id/nav_slideshow"
android:icon="@drawable/ic_menu_slideshow"
android:title="Slideshow" />
<item
android:id="@+id/nav_manage"
android:icon="@drawable/ic_menu_manage"
android:title="Tools" />
</group>
<item android:title="Communicate">
<menu>
<item
android:id="@+id/nav_share"
android:icon="@drawable/ic_menu_share"
android:title="Share" />
<item
android:id="@+id/nav_send"
android:icon="@drawable/ic_menu_send"
android:title="Send" />
</menu>
</item>
</menu>
Agora, meu plano é substituir essa lista de menus definida emactivity_main_drawer.xml
e use umExpandableListView
. Como eu quero que meus itens de menu tenham subcategorias, por exemplo, item de menuCars
terá subcategoria deDiesel
, Petrol
eHybrid
Eu fiz pesquisas e parece que ninguém tem a solução de trabalho exata de que preciso.
Eu olhei aqui:
Os Tutoriais AbertosImplementar lista de expansão expansível na atividade da gaveta de navegação feita pelo android studioAndroid: 2 ou mais ExpandableListView dentro da gaveta de navegaçãoComo criar um listView expansível dentro da gaveta de navegação?e os links subseqüentes mencionados lá.
N.B: Os links acima mencionam o uso deListView
na gaveta de navegação, que não é mais o caso, já que o Android Studio consegue isso usandomenu
item usandoactivity_main_drawer.xml
.
Alguém pode me fornecer um exemplo prático disso? Para reiterar, quero uma exibição de lista expansível dentro da atividade padrão da gaveta de navegação. Concluí que precisarei de arquivos XML e códigos de classe java para obter a base necessária para começar.
Desde já, obrigado. :)
Edição: Maquete final (desculpe minhas habilidades de photoshop)
Minha abordagem atual é criar um novo layoutex_list
do seguinte modo:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent">
<android.support.v4.widget.DrawerLayout
android:id="@+id/drawer_layout"
android:layout_width="match_parent"
android:layout_height="match_parent">
<ExpandableListView
android:id="@+id/lvExp"
android:layout_height="match_parent"
android:layout_width="match_parent"/>
</android.support.v4.widget.DrawerLayout>
</LinearLayout>
e editaractivity_main.xml
para
<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.widget.DrawerLayout 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:id="@+id/drawer_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
tools:openDrawer="start">
<include
layout="@layout/app_bar_main"
android:layout_width="match_parent"
android:layout_height="match_parent" />
<android.support.design.widget.NavigationView
android:id="@+id/nav_view"
android:layout_width="240dp"
android:layout_gravity = "start"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
app:headerLayout="@layout/nav_header_main">
<include
layout="@layout/ex_list"
android:layout_height="wrap_content"
android:layout_width="match_parent"/>
</android.support.design.widget.NavigationView>
</android.support.v4.widget.DrawerLayout>
Que resulta no seguinte layout:
e mensagem de erro de
java.lang.IllegalArgumentException: DrawerLayout must be measured with MeasureSpec.EXACTLY.
at android.support.v4.widget.DrawerLayout.onMeasure(DrawerLayout.java:1036)
at android.view.View.measure(View.java:18788)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5951)
at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1465)
at android.widget.LinearLayout.measureVertical(LinearLayout.java:748)
at android.widget.LinearLayout.onMeasure(LinearLayout.java:630)
at android.view.View.measure(View.java:18788)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5951)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:194)
at android.support.design.widget.NavigationView.onMeasure(NavigationView.java:223)
at android.view.View.measure(View.java:18788)
at android.support.v4.widget.DrawerLayout.onMeasure(DrawerLayout.java:1104)
at android.view.View.measure(View.java:18788)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5951)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:194)
at android.support.v7.widget.ContentFrameLayout.onMeasure(ContentFrameLayout.java:135)
at android.view.View.measure(View.java:18788)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5951)
at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1465)
at android.widget.LinearLayout.measureVertical(LinearLayout.java:748)
at android.widget.LinearLayout.onMeasure(LinearLayout.java:630)
at android.view.View.measure(View.java:18788)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5951)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:194)
at android.view.View.measure(View.java:18788)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5951)
at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1465)
at android.widget.LinearLayout.measureVertical(LinearLayout.java:748)
at android.widget.LinearLayout.onMeasure(LinearLayout.java:630)
at android.view.View.measure(View.java:18788)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5951)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:194)
at com.android.internal.policy.PhoneWindow$DecorView.onMeasure(PhoneWindow.java:2643)
at android.view.View.measure(View.java:18788)
at android.view.ViewRootImpl.performMeasure(ViewRootImpl.java:2100)
at android.view.ViewRootImpl.measureHierarchy(ViewRootImpl.java:1216)
at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1452)
at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1107)
at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:6013)
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:858)
at android.view.Choreographer.doCallbacks(Choreographer.java:670)
, at android.view.Choreographer.doFrame(Choreographer.java:606)
at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:844)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:5417)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
O que estou fazendo errado?
RESPONDA:
Obrigado @Moulesh !!!