底部导航BottomNavigationBar的使用

首先在android studio中加入

compile 'com.ashokvarma.android:bottom-navigation-bar:1.3.0'

activity_main.xml

<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:id="@+id/activity_main"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:paddingBottom="@dimen/activity_vertical_margin"    android:paddingLeft="@dimen/activity_horizontal_margin"    android:paddingRight="@dimen/activity_horizontal_margin"    android:paddingTop="@dimen/activity_vertical_margin"    tools:context="com.feiyiqi.gut.MainActivity">    <FrameLayout        android:id="@+id/frame"        android:layout_width="match_parent"        android:layout_height="match_parent"/>    <com.ashokvarma.bottomnavigation.BottomNavigationBar        android:id="@+id/bottom_navigation_bar"        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:layout_alignParentBottom="true"/></RelativeLayout>

MainActivity.java

public class MainActivity extends AppCompatActivity {     private List<Fragment> fragments;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        fragments = new ArrayList<>();        initView();    }    /*    初始化视图     */    public void initView(){        BottomNavigationBar bottomNavigationBar = (BottomNavigationBar) findViewById(R.id.bottom_navigation_bar);        //设置BottomNavigation模式        bottomNavigationBar.setMode(BottomNavigationBar.MODE_DEFAULT);        //设置BottomNavigation背景风格        bottomNavigationBar.setBackgroundStyle(BottomNavigationBar.BACKGROUND_STYLE_STATIC);        //添加导航选项        bottomNavigationBar.addItem(new BottomNavigationItem(R.mipmap.ic_bottom_bar_home,"首页")                .setActiveColorResource(R.color.colorPrimary))                .addItem(new BottomNavigationItem(R.mipmap.ic_bottom_bar_application,"应用")                .setActiveColorResource(R.color.colorPrimary))                .addItem(new BottomNavigationItem(R.mipmap.ic_bottom_bar_my,"我的")                .setActiveColorResource(R.color.colorPrimary))                .initialise();    }     /**     * 设置默认显示的fragment     */    private void setDefaultFragment() {        FragmentManager manager = getSupportFragmentManager();        FragmentTransaction transaction = manager.beginTransaction();        transaction.replace(R.id.id_content, HomeFragment.newInstance("首页"));        transaction.commit();    }    /**     * 获取fragment     *     * @return fragment列表     */    private List<Fragment> getFragments() {        List<Fragment> fragments = new ArrayList<>();        fragments.add(HomeFragment.newInstance("首页"));        fragments.add(FindFragmente.newInstance("应用"));        fragments.add(MineFragment.newInstance("我的"));        return fragments;    }    /*    *设置切换Fragment    */     public void onTabSelected(int position) {        if (fragments != null) {            if (position < fragments.size()) {                FragmentManager fm = getSupportFragmentManager();                FragmentTransaction ft = fm.beginTransaction();                Fragment fragment = fragments.get(position);                ft.replace(R.id.id_content, fragment);                ft.commitAllowingStateLoss();//选择性的提交，和commit有一定的区别，他不保证数据完整传输            }        }    }    public void onTabUnselected(int position) {    }    public void onTabReselected(int position) {    }}