BottomTabBar

使用BottomTabBar实现底部切换：
1、导入依赖

compile 'com.hjm:BottomTabBar:1.1.1'

2、在XML中定义控件

<com.hjm.bottomtabbar.BottomTabBar
     android:id="@+id/fragment"
     android:layout_width="match_parent"
     android:layout_height="match_parent">
 </com.hjm.bottomtabbar.BottomTabBar>

3.MainActivity中的设置
public class MainActivity extends AppCompatActivity {

private TopBar mTb;
private BottomTabBar bottomTabBar;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    mTb = findViewById(R.id.topbar);
    mTb.setLeftButtonVisibilty(false);
    mTb.setRightButtonVisibilty(false);

    bottomTabBar = findViewById(R.id.bottomtb);
    bottomTabBar.init(getSupportFragmentManager())
            .setImgSize(50,50)
            .setFontSize(8)
            .setTabPadding(4,6,10)
            .setChangeColor(Color.RED,Color.DKGRAY)
            .addTabItem("首页",R.drawable.a,FragmentOne.class)
            .addTabItem("分类",R.drawable.a,FragmentTwo.class)
            .addTabItem("购物车",R.drawable.a,FragmentThree.class)
            .addTabItem("我的",R.drawable.a,FragmentFour.class)
            .isShowDivider(false)
            .setOnTabChangeListener(new BottomTabBar.OnTabChangeListener() {
                @Override
                public void onTabChange(int position, String name) {
                    //mTb.setCenconTextViewVisibility(true,name);
                }
            });
	}
}