项目之使用TabLayout，实现页签的切换

初始化布局

1、创建数组，mFragments = new BaseFragment[4];

2、实例化，  mFragments[0] = NewsClassfiFragment.newInstance(ONE);

3、设置Tab的模式，TabMode:布局中Tab的行为模式（behavior mode），  mTabs.setTabMode(TabLayout.MODE_FIXED);

4、实例化适配器，  mAdapter = new BaseFragmentAdapter(getChildFragmentManager(), mFragments, titles);

private String[] titles = {"头条", "NBA", "汽车", "笑话"}; private BaseFragment[] mFragments; private BaseFragmentAdapter mAdapter; public static final int ONE = 0; public static final int TWO = 1; public static final int THREE = 2; public static final int FOUR = 3; @Override protected void initView() { mFragments = new BaseFragment[4]; mFragments[0] = NewsClassfiFragment.newInstance(ONE); mFragments[1] = NewsClassfiFragment.newInstance(TWO); mFragments[2] = NewsClassfiFragment.newInstance(THREE); mFragments[3] = NewsClassfiFragment.newInstance(FOUR); mTabs.setTabMode(TabLayout.MODE_FIXED); mAdapter = new BaseFragmentAdapter(getChildFragmentManager(), mFragments, titles); mViewPager.setAdapter(mAdapter); mTabs.setupWithViewPager(mViewPager); mViewPager.addOnPageChangeListener(this); } 5、创建 NewsClassfiFragment.class

package com.huading.baselhz; import android.os.Bundle; import com.huading.baselhz.base.BaseFragment; /** * 作者：LHZ on 2017/5/8 10:27 * 界面： */ public class NewsClassfiFragment extends BaseFragment { public static BaseFragment newInstance(int type) { Bundle bundle = new Bundle(); NewsClassfiFragment fragment = new NewsClassfiFragment(); bundle.putInt("type", type); fragment.setArguments(bundle); return fragment; } @Override protected int getLayoutId() { return R.layout.fragment_news_classfi; } @Override protected void initView() { } @Override protected void lazyFetchData() { } }