Android关于侧边栏的简单使用（drawerLayout，navigationview，动态添加menu）

目前市面上大部分app都有使用侧边栏，假如的app还没有该功能，该让你的产品经理加班了哦。。
一、侧边栏一般包括header和menu，header一般包括背景图、用户名等一些东东，切图如下

下面贴出activity的布局文件

<?xml version="1.0" encoding="utf-8"?><LinearLayout 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:orientation="vertical"    android:fitsSystemWindows="true"    tools:openDrawer="start">    <RelativeLayout        android:layout_width="match_parent"        android:layout_height="48dp"        android:background="@color/colorPrimary">        <TextView            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:id="@+id/tv_left"            android:textSize="18sp"            android:text="联动"            android:layout_centerVertical="true"            android:padding="5dp"            android:textColor="#ffffffff"/>    </RelativeLayout>    <android.support.v4.widget.DrawerLayout        android:layout_width="match_parent"        android:layout_height="match_parent"        android:id="@+id/drawer"        android:fitsSystemWindows="true"        tools:openDrawer="start">        <include layout="@layout/layout_my_fragment" />        <android.support.design.widget.NavigationView            android:id="@+id/nav_view"            android:layout_width="150dp"            android:layout_height="match_parent"            android:layout_gravity="start"            android:fitsSystemWindows="true"            app:headerLayout="@layout/nav_header" />    </android.support.v4.widget.DrawerLayout></LinearLayout>

2下面贴出在activity中的具体操作，其中包括动态添加navigation中的menu，及其点击事件；点击不同的menu在主页面中显示不同的fragment：

public class Main2Activity extends FragmentActivity {    @Bind(R.id.nav_view)    NavigationView navView;    @Bind(R.id.tv_left)    TextView tvLeft;    @Bind(R.id.drawer)    DrawerLayout drawer;    private List<TaskSceneFragment> fragments = new ArrayList<>();    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main2);        ButterKnife.bind(this);        navView.setItemIconTintList(null);//此处是设置menu图标的颜色为图标本身的颜色        navView.getMenu().add(1, 1, 1, "menu_1");//动态添加menu        navView.getMenu().add(2, 2, 2, "menu_1");        navView.getMenu().add(3, 3, 3, "menu_1");        //菜单的点击事件        navView.setNavigationItemSelectedListener(new NavigationView.OnNavigationItemSelectedListener() {            @Override            public boolean onNavigationItemSelected(@NonNull MenuItem item) {                switch (item.getOrder()) {                    case 1:                        switchFragment(fragments.get(0));                        Toast.makeText(Main2Activity.this, "点击menu1", Toast.LENGTH_SHORT).show();                        break;                    case 2:                        switchFragment(fragments.get(1));                        Toast.makeText(Main2Activity.this, "点击menu2", Toast.LENGTH_SHORT).show();                        break;                    case 3:                        switchFragment(fragments.get(2));                        Toast.makeText(Main2Activity.this, "点击menu3", Toast.LENGTH_SHORT).show();                        break;                }                return true;            }        });        System.out.println("navHeaderCount:" + navView.getHeaderCount());        navView.getHeaderView(0).setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View view) {                Toast.makeText(Main2Activity.this, "click_head", Toast.LENGTH_SHORT).show();            }        });        initFragment();    }    private void switchFragment(TaskSceneFragment fragment) {        if (fragment.isAdded()) {            fm.beginTransaction().hide(currentFragment).show(fragment).commit();        } else {            fm.beginTransaction().add(R.id.frame_layout, fragment).hide(currentFragment).show(fragment).commit();        }        currentFragment = fragment;    }    FragmentManager fm;    TaskSceneFragment currentFragment;    private void initFragment() {        fm = getSupportFragmentManager();        for (int i = 0; i < 3; i++) {            TaskSceneFragment fragment = TaskSceneFragment.newInstance(i, "");            fragments.add(fragment);        }        fm.beginTransaction().add(R.id.frame_layout, fragments.get(0)).commit();        currentFragment = fragments.get(0);    }    @OnClick(R.id.tv_left)    public void onClick() {        //此处是点击联动按钮打开或者关闭侧边栏        if(drawer.isDrawerOpen(GravityCompat.START)){            drawer.closeDrawer(GravityCompat.START);        }else {            drawer.openDrawer(GravityCompat.START);        }    }}

简单实现侧边栏就是这么的简单，欢迎大家积极留言，点赞，您的鼓励会给予我非常大的动力，非常感谢！！！！！。下一篇将会给大家带来Fragment的嵌套使用，还是基于当前demo，欢迎大家积极指正错误。。