DrawerLayout—侧拉栏的使用

2.由<android.support.v4.widget.DrawerLayout/>控件包裹整体布局

3.侧拉栏布局由<android.support.design.widget.NavigationView/>包裹
注意事项：
1)此布局需放在主布局下方
2)指定滑动位置 例:android:layout_gravity="left"
3)添加侧滑布局中的头部布局 app:headerLayout="@layout/header"
4)添加侧滑布局中的菜单条目 app:menu="@menu/menuview"
5)菜单条目中用<group android:checkableBehavior="single"></group>包裹

4.结合toolbar内容,创建主布局

 

关于Activity：
1)初始化DrawerLayout控件

2)开启侧滑 参数为滑动方向
activityMain.openDrawer(Gravity.LEFT);

3)判断侧滑栏状态
boolean drawerOpen = activityMain.isDrawerOpen(Gravity.LEFT);
       if(drawerOpen){
            Toast.makeText(this,"菜单栏关闭了",Toast.LENGTH_SHORT).show();
       }else{
            Toast.makeText(this,"菜单栏打开了",Toast.LENGTH_SHORT).show();
    }

4)侧滑的监听 activityMain.addDrawerListener(new DrawerLayout.DrawerListener() {
①当滑动时的监听
        public void onDrawerSlide(View drawerView, float slideOffset) {
            Toast.makeText(MainActivity.this,"侧滑正在改变中",Toast.LENGTH_SHORT).show();
        }
②完全打开侧滑的监听
        public void onDrawerOpened(View drawerView) {
            Toast.makeText(MainActivity.this,"已完全打开侧滑",Toast.LENGTH_SHORT).show();
        }
③完全关闭侧滑的监听
        public void onDrawerClosed(View drawerView) {
            Toast.makeText(MainActivity.this,"已完全关闭侧滑",Toast.LENGTH_SHORT).show();
        }
④当状态发生改变地的监听
        public void onDrawerStateChanged(int newState) {
            if(newState==DrawerLayout.STATE_IDLE){//空闲状态
                Toast.makeText(MainActivity.this,"空闲状态",Toast.LENGTH_SHORT).show();
              }else if(newState==DrawerLayout.STATE_DRAGGING){//拖动状态
                Toast.makeText(MainActivity.this,"拖动状态",Toast.LENGTH_SHORT).show();
              }else if(newState==DrawerLayout.STATE_SETTLING) {//固定状态
                Toast.makeText(MainActivity.this,"固定状态",Toast.LENGTH_SHORT).show();
                }
            }
        });

 

5)侧滑menu的监听

navigationView.setNavigationItemSelectedListener(newNavigationView.OnNavigationItemSelectedListener() {

6)点击菜单元素退出侧滑菜单栏(可在监听事件中编写)

 drawerLayout.closeDrawer(Gravity.LEFT);

 

7)点击某条目改为选中状态

item.setChecked(true);