tablayout在点击或者滑动的时候会触发监听事件  , 当你调用这个方法的时候 会触发事件

mTablayout.addOnTabSelectedListener(new TabLayout.OnTabSelectedListener() {
    @Override
    public void onTabSelected(TabLayout.Tab tab) {
        Toast.makeText(mContext, "选中的"+tab.getText(), Toast.LENGTH_SHORT).show();
    @Override
    public void onTabUnselected(TabLayout.Tab tab) {
        Toast.makeText(mContext, "未选中的"+tab.getText(), Toast.LENGTH_SHORT).show();
    @Override
    public void onTabReselected(TabLayout.Tab tab) {
        Toast.makeText(mContext, "复选的"+tab.getText(), Toast.LENGTH_SHORT).show();