ANDROID BottomNavigationBar底部导航栏的实现示例

compile'com.ashokvarma.android:bottom-navigation-bar:1.2.0'

<?xml version="1.0" encoding="utf-8"?><LinearLayout  xmlns:android="http://schemas.android.com/apk/res/android"  android:layout_width="match_parent"  android:layout_height="match_parent"  android:orientation="vertical">  <FrameLayout    android:id="@+id/fragment_container"    android:layout_width="match_parent"    android:layout_height="0dp"    android:layout_weight="1"/>  <com.ashokvarma.bottomnavigation.BottomNavigationBar    android:id="@+id/bottom_navigation_bar"    android:layout_width="match_parent"    android:layout_height="wrap_content"    android:layout_gravity="bottom"/></LinearLayout>

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"  android:orientation="vertical"  android:layout_width="match_parent"  android:layout_height="match_parent"  android:gravity="center">  <TextView    android:text="主页"    android:layout_width="wrap_content"    android:layout_height="wrap_content" /></LinearLayout>

public class MainActivity extends AppCompatActivity implements BottomNavigationBar.OnTabSelectedListener {  BottomNavigationBar mBottomNavigationBar;  private IndexFragment indexFragment;  private MapFragment mapFragment;  private LoveFragment loveFragment;  private PersonFragment personFragment;  private BadgeItem badgeItem;  @Override  protected void onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    setContentView(R.layout.activity_main);    initBadge();    setDefaultFragment();    InitNavigationBar();  }  private void InitNavigationBar() {    mBottomNavigationBar = (BottomNavigationBar)findViewById(R.id.bottom_navigation_bar);    mBottomNavigationBar.setTabSelectedListener(this);    mBottomNavigationBar.setMode(BottomNavigationBar.MODE_SHIFTING);    mBottomNavigationBar.setBackgroundStyle(BottomNavigationBar.BACKGROUND_STYLE_RIPPLE);    mBottomNavigationBar        .addItem(new BottomNavigationItem(R.drawable.icon_index,"首页").setActiveColorResource(R.color.red))        .addItem(new BottomNavigationItem(R.drawable.icon_map,"地图").setActiveColorResource(R.color.blue))        .addItem(new BottomNavigationItem(R.drawable.icon_love,"关注").setActiveColorResource(R.color.yellow).setBadgeItem(badgeItem))        .addItem(new BottomNavigationItem(R.drawable.icon_person,"个人").setActiveColorResource(R.color.green))        .setFirstSelectedPosition(0)        .initialise();  }  public void initBadge()  {    badgeItem = new BadgeItem()          .setBorderWidth(2)          .setBorderColor("#ff0000")          .setBackgroundColor("#ff0000")          .setGravity(Gravity.RIGHT| Gravity.TOP)          .setText("2")          .setTextColor("#ffffff")          .setAnimationDuration(2000)          .setHideOnSelect(true);  }  private void setDefaultFragment() {    FragmentManager fm = getSupportFragmentManager();    FragmentTransaction transaction = fm.beginTransaction();    indexFragment = new IndexFragment();    transaction.replace(R.id.fragment_container, indexFragment);    transaction.commit();  }  @Override  public void onTabSelected(int position) {    Log.d("onTabSelected", "onTabSelected: " + position);    FragmentManager fm = getSupportFragmentManager();    FragmentTransaction transaction = fm.beginTransaction();    switch (position) {      case 0:        if (indexFragment == null) {          indexFragment = new IndexFragment();        }        transaction.replace(R.id.fragment_container, indexFragment);        break;      case 1:        if (mapFragment== null) {          mapFragment = new MapFragment();        }        transaction.replace(R.id.fragment_container, mapFragment);        break;      case 2:        if (loveFragment == null) {          loveFragment = new LoveFragment();        }        transaction.replace(R.id.fragment_container,loveFragment);        break;      case 3:        if (personFragment == null) {          personFragment = new PersonFragment();        }        transaction.replace(R.id.fragment_container,personFragment);        break;      default:        break;    }    // 事务提交    transaction.commit();  }  @Override  public void onTabUnselected(int position) {    Log.d("onTabUnselected", "onTabUnselected: " + position);  }  @Override  public void onTabReselected(int position) {    Log.d("onTabReselected", "onTabReselected: " + position);  }}

badgeItem = new BadgeItem().setBorderWidth(2)//边框宽度          .setBorderColor("#ff0000")//边框颜色          .setBackgroundColor("#ff0000")//背景颜色          .setGravity(Gravity.RIGHT| Gravity.TOP)//显示位置          .setText("2")//显示文字          .setTextColor("#ffffff")//文字颜色          .setAnimationDuration(2000)//渐退、渐出的时间          .setHideOnSelect(true);//选中时是否消失

FragmentManager fm = getSupportFragmentManager();    FragmentTransaction transaction = fm.beginTransaction();    indexFragment = new IndexFragment();    transaction.replace(R.id.fragment_container, indexFragment);    transaction.commit();

mBottomNavigationBar.setTabSelectedListener(this);

FragmentManager fm = getSupportFragmentManager();    FragmentTransaction transaction = fm.beginTransaction();    switch (position) {      case 0:        if (indexFragment == null) {          indexFragment = new IndexFragment();        }        transaction.replace(R.id.fragment_container, indexFragment);        break;      case 1:        if (mapFragment== null) {          mapFragment = new MapFragment();        }        transaction.replace(R.id.fragment_container, mapFragment);        break;      case 2:        if (loveFragment == null) {          loveFragment = new LoveFragment();        }        transaction.replace(R.id.fragment_container,loveFragment);        break;      case 3:        if (personFragment == null) {          personFragment = new PersonFragment();        }        transaction.replace(R.id.fragment_container,personFragment);        break;      default:        break;    }    // 事务提交    transaction.commit();