TabLayout（频道管理）的使用

XML源码：
frag_02.xml

<?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"
    xmlns:app="http://schemas.android.com/apk/res-auto"

    android:orientation="vertical">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal">

        <android.support.design.widget.TabLayout
            android:id="@+id/tablayout"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            app:tabGravity="center"
            app:tabMode="scrollable"></android.support.design.widget.TabLayout>

        <ImageView
            android:id="@+id/tabImage"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:src="@mipmap/ic_launcher" />

    </LinearLayout>

    <android.support.v4.view.ViewPager
        android:id="@+id/pager"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"></android.support.v4.view.ViewPager>


</LinearLayout>

frag_02_one.xml

<?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" 
     android:background="#000">
    

</LinearLayout>

上面的代码是上边的滑动的菜单

以下的代码就是黑色部分的java代码

package com.guo.xiangmu.frag.tab;

import com.guo.xiangmu.R;
import com.guo.xiangmu.frag.BaseFramt;

public class Fragment01 extends BaseFramt {
    @Override
    protected int bindLayout() {
        return R.layout.frag_02_one;
    }

    @Override
    protected void initView() {

    }

    @Override
    protected void initData() {

    }

    @Override
    protected void bindEvent() {

    }
}

JAVA源码：

package com.guo.xiangmu.frag;

import com.guo.xiangmu.R;
import com.guo.xiangmu.frag.tab.Fragment01;
import com.qy.channel.ChannelActivity;
import com.qy.channel.bean.ChannelItem;
import com.qy.channel.db.DBUtil;


import android.content.Intent;
import android.os.Bundle;
import android.support.design.widget.TabLayout;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentPagerAdapter;
import android.support.v4.view.ViewPager;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;

import java.util.ArrayList;

public class Frag_02 extends BaseFramt{


	private TabLayout tabLayout;
	private ViewPager pager;
	private ImageView imageView;
	private ArrayList<ChannelItem> userChannelList = new ArrayList<ChannelItem>();
	private ArrayList<Fragment> list;



	@Override
	protected int bindLayout() {
		return R.layout.frag_02;
	}

	@Override
	protected void initView() {
		//找控件
		tabLayout = bindView(R.id.tablayout);
		pager = bindView(R.id.pager);
		imageView = bindView(R.id.tabImage);
	}

	@Override
	protected void initData() {
		//初始化Tab数据
		//查询数据库
		userChannelList = DBUtil.getTabData(getActivity());
		//加载Fragment
		list = new ArrayList<>();

		for (int i = 0; i < userChannelList.size(); i++) {
			ChannelItem channelItem = userChannelList.get(i);
			String name = channelItem.getName();
			list.add(new Fragment01());
		}


	}

	@Override
	protected void bindEvent() {
		//设置适配器
		pagerAdapter();
		//绑定 让viewpager和tabLayout关联
		tabLayout.setupWithViewPager(pager);
		//点击跳转频道管理
		imageView.setOnClickListener(new View.OnClickListener() {
			@Override
			public void onClick(View v) {
				//跳转Activity
				Intent intent = new Intent(getActivity(), ChannelActivity.class);
				//跳转回传
				startActivityForResult(intent, 0);
			}
		});

	}

	@Override
	public void onActivityResult(int requestCode, int resultCode, Intent data) {
		super.onActivityResult(requestCode, resultCode, data);
		//判断是不是我们的回传 回传值是0
		if (requestCode == 0) {
			//查询数据库中的数据 ,找到我们要展示的Tab标签
			userChannelList = DBUtil.getTabData(getActivity());
			//便利数据(对数据进行刷新操作)
			for (int i = 0; i < userChannelList.size(); i++) {

				ChannelItem channelItem = userChannelList.get(i);
				String name = channelItem.getName();
				tabLayout.addTab(tabLayout.newTab().setText(name));
				//8设置fragment(可以根据名字创建Fragment)
//                if ("北京".equals(tabName)) {
				list.add(new Fragment01());
//                } else {
////                    .,....
//                }
			}
		}
		tabLayout.setupWithViewPager(pager);
		pagerAdapter();
	}

	private void pagerAdapter() {

		pager.setAdapter(new FragmentPagerAdapter(getActivity().getSupportFragmentManager()) {
			@Override
			public Fragment getItem(int i) {
				return list.get(i);
			}

			@Override
			public int getCount() {
				return userChannelList.size();
			}


			@Override
			public CharSequence getPageTitle(int position) {
				return userChannelList.get(position).getName();
			}
		});

	}

}