原生BottomNavigationView的使用

首先注入design包

然后xml里面

<android.support.design.widget.BottomNavigationView
 android:background="@color/activity_bg"
    android:id="@+id/bottom_navigation_bar"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    app:labelVisibilityMode="labeled"
    app:itemBackground="@null"
    app:layout_constraintBottom_toBottomOf="parent"
    app:menu="@menu/nabigation" />

文件里面的meun 在res目录下创建meun文件加然后创建nabigation.xml

<menu xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto">
<item
    android:id="@+id/navigation_phone"
    android:icon="@drawable/adress"
    app:showAsAction="ifRoom"
    android:title="@string/adress" />

<item
    android:id="@+id/navigation_home"
    android:icon="@drawable/home"
    app:showAsAction="ifRoom"
    android:title="@string/home" />

<item
    android:id="@+id/navigation_found"
    android:icon="@drawable/unfound"
    app:showAsAction="ifRoom"
    android:title="@string/found" />
</menu>

activity中

private void initBottomNativiBar() {
    bottomNavigationBar.setItemIconTintList(null);
    Resources resource=getBaseContext().getResources();
    ColorStateList csl=resource.getColorStateList(R.color.bottom_text_color);
    bottomNavigationBar.setItemTextAppearanceActive(R.style.bottom_selected_text);
    bottomNavigationBar.setItemTextAppearanceInactive(R.style.bottom_normal_text);
    bottomNavigationBar.setItemTextColor(csl);
    bottomNavigationBar.setOnNavigationItemSelectedListener(new BottomNavigationView.OnNavigationItemSelectedListener() {
        @Override
        public boolean onNavigationItemSelected(@NonNull MenuItem menuItem) {
            FragmentManager fm = ActivityMain.this.getSupportFragmentManager();
            //开启事务
            FragmentTransaction transaction = fm.beginTransaction();
            resetToDefaultIcon();//图标全部默认
            switch (menuItem.getItemId()) {
                case R.id.navigation_phone:
                    if (fragmentAdress == null) {
                        fragmentAdress = FragmentAdress.newInstance();
                    }
                    menuItem.setIcon(R.drawable.un_adress);
                    menuItem.setChecked(true);
                    if (transaction==null)transaction =fm.beginTransaction();
                    transaction.replace(R.id.fragment, fragmentAdress).commit();
                    break;
                case R.id.navigation_home:
                    if (fragmentHome == null) {
                        fragmentHome = FragmentHome.newInstance();
                    }
                    menuItem.setIcon(R.drawable.un_home);
                    menuItem.setChecked(true);
                    if (transaction==null)transaction =fm.beginTransaction();
                    transaction.replace(R.id.fragment, fragmentHome).commit();
                    break;
                case R.id.navigation_found:
                    if (fragmentFound == null) {
                        fragmentFound = fragmentFound.newInstance();
                    }
                    menuItem.setIcon(R.drawable.found);
                    menuItem.setChecked(true);
                    if (transaction==null)transaction =fm.beginTransaction();
                    transaction.replace(R.id.fragment, fragmentFound).commit();
                    break;
            }

            return false;
        }
    });

    //默认显示出来FragmentAdress
    FragmentManager fm = ActivityMain.this.getSupportFragmentManager();
    FragmentTransaction transaction = fm.beginTransaction();
    if (fragmentHome == null) {
        fragmentHome = FragmentHome.newInstance();
    }
    transaction.replace(R.id.fragment, fragmentHome).commit();
    bottomNavigationBar.getMenu().getItem(1).setChecked(true);
    bottomNavigationBar.getMenu().getItem(1).setIcon(R.drawable.un_home);
    }

    private void resetToDefaultIcon() {
        MenuItem adress =  bottomNavigationBar.getMenu().findItem(R.id.navigation_phone);
        adress.setIcon(R.drawable.adress);
        MenuItem home =  bottomNavigationBar.getMenu().findItem(R.id.navigation_home);
        home.setIcon(R.drawable.home);
        MenuItem found =  bottomNavigationBar.getMenu().findItem(R.id.navigation_found);
        found.setIcon(R.drawable.unfound);
    }

style文件中

<style name="bottom_normal_text">
    <item name="android:textColor">@color/font_hint</item>
    <item name="android:textSize">14sp</item>
</style>
<!--选中的样式为了去除bottom动画-->
<style name="bottom_selected_text">
    <item name="android:textColor">@color/colorPrimary</item>
    <item name="android:textSize">14sp</item>
</style>