DrawerLayout布局的使用步骤

说明：
DrawerLayout:内部有两个子布局（或者控件）
ScrollView中只能有个布局。先写的是内容(主布局)，后写的是侧滑布局（ android:layout_gravity="left"）

acvitity_main.xml

<android.support.v7.widget.Toolbar
       android:id="@+id/tb_bar"
       android:layout_width="match_parent"
       android:layout_height="wrap_content"
       android:background="@color/colorPrimary"/>
    <android.support.v4.widget.DrawerLayout
        android:id="@+id/dl_layout"
        android:background="@android:color/holo_orange_light"
        android:layout_width="match_parent"
        android:layout_height="match_parent">
        
        <TextView
            android:id="@+id/tv_content"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:gravity="center"
            android:text="内容"
            android:textSize="25sp"/>
        
        <ListView
            android:id="@+id/lv_menu"
            android:layout_width="220dp"
            android:layout_height="match_parent"
            android:background="@android:color/darker_gray"
            android:layout_gravity="left" >

        ListView>

    android.support.v4.widget.DrawerLayout>

MainAcvitity.java

public class MainActivity extends AppCompatActivity {
    private Toolbar tb_bar;
    private TextView tv_content;
    private ListView lv;
    private DrawerLayout dl_layout;
    private String[] menus = new String[]{"item1", "item2", "item3", "item4", "item5", "item6"};

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        intiView();
    }
    public void intiView(){
        tb_bar= (Toolbar) findViewById(R.id.tb_bar);
        tv_content= (TextView) findViewById(R.id.tv_content);
        lv= (ListView) findViewById(R.id.lv_menu);
        dl_layout= (DrawerLayout) findViewById(R.id.dl_layout);
        //给listview设置展示的数据
        ArrayAdapter adapter=new ArrayAdapter(this, android.R.layout.simple_list_item_1,menus);
        lv.setAdapter(adapter);
        lv.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView parent, View view, int position, long id) {
                tv_content.setText(menus[position]);
                if(dl_layout.isDrawerOpen(Gravity.LEFT)){//如果此时抽屉窗口打开，就给他关闭
                        dl_layout.closeDrawer(Gravity.LEFT);
                }
            }
        });
        //给Toolbar设置左上角的图标和监听事件
        tb_bar.setNavigationIcon(R.drawable.ic_drawer_home);
        tb_bar.setNavigationOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                //如果抽屉关闭就打开，如果抽屉打开就关闭
                if(dl_layout.isDrawerOpen(Gravity.LEFT)){
                    dl_layout.closeDrawer(Gravity.LEFT);
                }else {//如果已经是关闭状态
                    dl_layout.openDrawer(Gravity.LEFT);
                }
            }
        });