Android TabLayout 实现底部Tab的示例代码

public class CustomBotTabItem {  private TabLayout mTabLayout;  private ViewPager mViewPager;  private Context mContext;  //底部Tab标题  private final String[] mTitles = {"主页", "理财", "添加", "消息", "我的"};  //返回CustomBotTabItem实例  public static CustomBotTabItem create() {    return TabItemHolder.sCustomTabItem;  }  //创建CustomBotTabItem实例  private static class TabItemHolder {    private static CustomBotTabItem sCustomTabItem = new CustomBotTabItem();  }  //引入布局需要的Context  public CustomBotTabItem setContext(Context context) {    mContext = context;    return this;  }  //需要自定义的TabLayout  public CustomBotTabItem setTabLayout(TabLayout tabLayout) {    mTabLayout = tabLayout;    return this;  }  //设置与TabLayout关联的ViewPager  public CustomBotTabItem setViewPager(ViewPager viewPager) {    mViewPager = viewPager;    return this;  }  //创建Tab  public CustomBotTabItem build() {    initTabLayout();    return this;  }  //初始化Tab  private void initTabLayout() {    mTabLayout.setupWithViewPager(mViewPager);    //第二个参数为selector，下同    mTabLayout.getTabAt(0).setCustomView(getTabView(0, R.drawable.home_icon_selector));    mTabLayout.getTabAt(1).setCustomView(getTabView(1, R.drawable.manage_icon_selector));    mTabLayout.getTabAt(2).setCustomView(getTabView(2, R.drawable.add_icon_selector));    mTabLayout.getTabAt(3).setCustomView(getTabView(3, R.drawable.find_icon_selector));    mTabLayout.getTabAt(4).setCustomView(getTabView(4, R.drawable.money_icon_selector));    tabSelectListener();  }   //自定义Tab样式  private View getTabView(final int position, int resId) {    final View view = LayoutInflater.from(mContext).inflate(R.layout.bottom_tab_item, null);    TextView tvTitle = (TextView) view.findViewById(R.id.id_tv_title);    final ImageView ivTitle = (ImageView) view.findViewById(R.id.id_iv_title);    ivTitle.setImageResource(resId);    tvTitle.setText(mTitles[position]);    //默认第一个tab选中，设置字体为选中色    if (position == 0) {      tvTitle.setTextColor(Color.parseColor("#4192e3"));    } else {      tvTitle.setTextColor(Color.parseColor("#262a3b"));    }    //点击Tab切换    view.setOnClickListener(new View.OnClickListener() {      @Override      public void onClick(View v) {        mViewPager.setCurrentItem(position);      }    });    return view;  }  //Tab监听  private void tabSelectListener() {    mTabLayout.addOnTabSelectedListener(new TabLayout.OnTabSelectedListener() {      @Override      public void onTabSelected(TabLayout.Tab tab) {        changeTabStatus(tab, true);      }      @Override      public void onTabUnselected(TabLayout.Tab tab) {        changeTabStatus(tab, false);      }      @Override      public void onTabReselected(TabLayout.Tab tab) {      }    });  }  //切换Tab文字是否选中的的颜色  private void changeTabStatus(TabLayout.Tab tab, boolean selected) {    View view = tab.getCustomView();    if (view == null) {      return;    }    TextView tvTitle = (TextView) view.findViewById(R.id.id_tv_title);    if (selected) {      tvTitle.setTextColor(Color.parseColor("#4192e3"));    } else {      tvTitle.setTextColor(Color.parseColor("#262a3b"));    }  }}

public class BottomTabLayoutActivity extends AppCompatActivity {  private TabLayout mTabLayout;  private ViewPager mViewPager;  private List<Fragment> mFragmentList;  @Override  protected void onCreate(@Nullable Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    setContentView(R.layout.activity_bot_tab_layout);    findView();    initFragmentList();    setVpAdapter();    CustomBotTabItem item = CustomBotTabItem.create();    item.setContext(this)        .setViewPager(mViewPager)        .setTabLayout(mTabLayout)        .build();  }  //findViewById  private void findView() {    mTabLayout = (TabLayout) findViewById(R.id.id_tab_layout);    mViewPager = (ViewPager) findViewById(R.id.id_vp);  }  //初始化需要的Fragment  private void initFragmentList() {    mFragmentList = new ArrayList<>();    mFragmentList.add(TabFragment.getInstance("主页"));    mFragmentList.add(TabFragment.getInstance("理财"));    mFragmentList.add(TabFragment.getInstance("添加"));    mFragmentList.add(TabFragment.getInstance("消息"));    mFragmentList.add(TabFragment.getInstance("我的"));  }  //设置ViewPager的Adapter  private void setVpAdapter() {    mViewPager.setAdapter(new FragmentAdapter(getSupportFragmentManager(), mFragmentList, this));  }}

<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"        xmlns:app="http://schemas.android.com/apk/res-auto"        android:layout_width="match_parent"        android:layout_height="match_parent">  <android.support.design.widget.TabLayout    android:id="@+id/id_tab_layout"    android:layout_width="match_parent"    android:layout_height="70dp"    android:layout_alignParentBottom="true"    android:background="#fff"    android:fillViewport="false"    app:layout_scrollFlags="scroll"    app:tabIndicatorHeight="0dp"    app:tabMode="fixed"    >  </android.support.design.widget.TabLayout>  <android.support.v4.view.ViewPager    android:id="@+id/id_vp"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:layout_above="@+id/id_tab_layout"    /></RelativeLayout>