Nvigitiontion Drawer Activity的使用

在android studio中创建Nvigitiontion Drawer Activity后生成了三部分xml文件，分别为drawable,layout和menu。

一.主界面是layout/activiyt_main.xml,他定义了DrawerLayout作为布局管理器，DrawerLayout主要由两个部分组成： 1、用户内容 2、侧滑菜单

<?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>

1.用户内容是<include/>部分

打开顺序是layout/activiyt_main.xml——app_bar_main.xml——content_main.xml

2.侧滑菜单

android:layout_gravity=”start”这个属性指定了菜单的左侧滑出效果

app:headerLayout="@layout/nav_header_main" 这个定义头部布局样式

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="@dimen/nav_header_height"    android:background="@drawable/side_nav_bar"    android:gravity="bottom"    android:orientation="vertical"    android:paddingBottom="@dimen/activity_vertical_margin"    android:paddingLeft="@dimen/activity_horizontal_margin"    android:paddingRight="@dimen/activity_horizontal_margin"    android:paddingTop="@dimen/activity_vertical_margin"    android:theme="@style/ThemeOverlay.AppCompat.Dark">    <ImageView        android:id="@+id/imageView"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:paddingTop="@dimen/nav_header_vertical_spacing"        android:src="@android:drawable/sym_def_app_icon" />    <TextView        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:paddingTop="@dimen/nav_header_vertical_spacing"        android:text="Android Studio"        android:textAppearance="@style/TextAppearance.AppCompat.Body1" />    <TextView        android:id="@+id/textView"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="[e-mail]" /></LinearLayout>

app:menu="@menu/activity_main_drawer" 这个定义菜单的具体项目

<?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>

菜单这部分在Activity的java代码中，由Activity实现了NavigationView.OnNavigationItemSelectedListener接口并重写onNavigationItemSelected(MenuItem item)方法来响应菜单按钮的点击事件

public boolean onNavigationItemSelected(MenuItem item) {    // Handle navigation view item clicks here.    int id = item.getItemId();    if (id == R.id.nav_camera) {        // Handle the camera action    } else if (id == R.id.nav_gallery) {    } else if (id == R.id.nav_slideshow) {    } else if (id == R.id.nav_manage) {    } else if (id == R.id.nav_share) {    } else if (id == R.id.nav_send) {    }    DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);    drawer.closeDrawer(GravityCompat.START);    return true;}