频道管理 三方的频道管理

主函数频道管理

package com.example.yuekao02.fragment.zhufragment;

import android.content.Intent;
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.support.design.widget.TabLayout;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentPagerAdapter;
import android.support.v4.app.FragmentStatePagerAdapter;
import android.support.v4.view.ViewPager;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;

import com.andy.library.ChannelActivity;
import com.andy.library.ChannelBean;
import com.example.yuekao02.R;
import com.example.yuekao02.activity.Main2Activity;
import com.example.yuekao02.fragment.ziafragment.AaFragment;
import com.example.yuekao02.fragment.ziafragment.AbFragment;
import com.example.yuekao02.fragment.ziafragment.AcFragment;
import com.google.gson.Gson;
import com.google.gson.reflect.TypeToken;

import java.lang.reflect.Type;
import java.util.ArrayList;
import java.util.List;

import static com.andy.library.ChannelActivity.RESULT_JSON_KEY;

public class AFragment extends Fragment {

    private TabLayout tabLayout;
    private ViewPager viewPager;
    private Button button;
    private List<ChannelBean> list=new ArrayList<>();
    private List<Fragment> fragments = new ArrayList<>();
    private String stringArrayExtra=\"\";
    private Gson gson;
    private FragmentStatePagerAdapter adapter;


    @Nullable
    @Override
    public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
        return inflater.inflate(R.layout.zhufragment01,null);
    }

    @Override
    public void onViewCreated(@NonNull View view, @Nullable Bundle savedInstanceState) {
        super.onViewCreated(view, savedInstanceState);

        tabLayout = view.findViewById(R.id.tab_layout02);
        viewPager = view.findViewById(R.id.view_pager02);
        button = view.findViewById(R.id.button);
        //加载数据频道管理
        pindaoguanli();

    }

    private void pindaoguanli() {

        list.add(new ChannelBean(\"军事\",true));
        list.add(new ChannelBean(\"犹如\",true));
        list.add(new ChannelBean(\"推特\",true));

        list.add(new ChannelBean(\"微博\",false));
        list.add(new ChannelBean(\"博客\",true));
        list.add(new ChannelBean(\"CSDN\",false));

        list.add(new ChannelBean(\"体育\",false));
        list.add(new ChannelBean(\"教育\",false));
        list.add(new ChannelBean(\"学习\",false));

        
		fragments.add(new AaFragment());
        fragments.add(new AbFragment());
        fragments.add(new AcFragment());

        fragments.add(new AaFragment());
        fragments.add(new AbFragment());
        fragments.add(new AcFragment());

        fragments.add(new AaFragment());
        fragments.add(new AbFragment());
        fragments.add(new AcFragment());



        for(int i=0;i<list.size();i++){
            if(list.get(i).isSelect()){
                tabLayout.addTab(tabLayout.newTab().setText(list.get(i).getName()));
            }
        }

        //创建适配器

        adapter = new FragmentStatePagerAdapter(getChildFragmentManager()) {
            @Override
            public Fragment getItem(int i) {
                return fragments.get(i);
            }

            @Override
            public int getCount() {
                int count = 0;
                for (int i = 0; i < list.size(); i++) {
                    if (list.get(i).isSelect()) {
                        count++;
                    }
                }
                return count;
            }

            @Nullable
            @Override
            public CharSequence getPage (int position) {
                return list.get(position).getName();
            }
        };

        viewPager.setAdapter(adapter);
        tabLayout.setupWithViewPager(viewPager);
        button.set Listener(new View. Listener() {
            @Override
            public void  (View v) {
                gson = new Gson();
                String s = gson.toJson(list);
                Intent intent = new Intent(getActivity(),ChannelActivity.class);
                intent.putExtra(RESULT_JSON_KEY,s);
                //100
                startActivityForResult(intent,ChannelActivity.REQUEST_CODE);
            }
        });
    }

    @Override
    public void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        if (requestCode==ChannelActivity.REQUEST_CODE && resultCode==ChannelActivity.RESULT_CODE){

            stringArrayExtra = data.getStringExtra(ChannelActivity.RESULT_JSON_KEY);

            tabLayout.removeAllTabs();

            gson = new Gson();

            //getType
            Type type = new TypeToken<List<ChannelBean>>(){}.getType();

            //赋值给Bean类中
            list = gson.fromJson(stringArrayExtra,type);

            adapter.notifyDataSetChanged();
           /* for (int i = 0; i <list.size() ; i++) {
                if (list.get(i).isSelect()){
                    try {
                        tabLayout.addTab(tabLayout.newTab().setText(list.get(i).getName()));
                    }catch (Exception e){}
                }
            }*/

            viewPager.getAdapter().notifyDataSetChanged();
        }
    }
}