咨询_频道管理

 build.gradle project

// Top-level build file where you can add configuration options common to all sub-projects/modules.

buildscript {

    repositories {
        google()
        jcenter()

    }
    dependencies {
        classpath 'com.android.tools.build:gradle:3.2.1'
        // NOTE: Do not place your application dependencies here; they belong
        // in the individual module build.gradle files
    }
}

allprojects {
    repositories {
        google()
        jcenter()
        //添加一个远程仓库;
        maven {url "https://jitpack.io"}
    }
}

task clean(type: Delete) {
    delete rootProject.buildDir
}

builder 

    implementation 'com.github.andyoom:draggrid:v1.0.1'

MainActivity

package com.bw.zsd.pin;

import android.content.Intent;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.design.widget.TabLayout;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;
import android.support.v4.view.ViewPager;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.Button;

import com.andy.library.ChannelActivity;
import com.andy.library.ChannelBean;
import com.bw.zsd.pin.R;
import com.google.gson.Gson;
import com.google.gson.reflect.TypeToken;

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

public class MainActivity extends AppCompatActivity {
    TabLayout tb;
    ViewPager vp;
    Button btn;
    ArrayList<Fragment> fragmentList = new ArrayList<Fragment>();
    ArrayList<ChannelBean> channelBeanList = new ArrayList<ChannelBean>();
    private MPagerAdapter mPagerAdapter;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        initVeiw();
        initData();
    }
    private void initVeiw() {
        tb = (TabLayout) findViewById(R.id.tb);
        vp = (ViewPager) findViewById(R.id.vp);
        btn = (Button) findViewById(R.id.btn);
        btn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                ChannelActivity.startChannelActivity(MainActivity.this, channelBeanList);
            }
        });
    }

    private void initData() {
        channelBeanList.add(new ChannelBean("热点", true));
        channelBeanList.add(new ChannelBean("北京", true));
        channelBeanList.add(new ChannelBean("房价", true));
        channelBeanList.add(new ChannelBean("旅游", false));
        channelBeanList.add(new ChannelBean("条目1", false));
        channelBeanList.add(new ChannelBean("条目2", false));
        for (int i = 0; i < channelBeanList.size(); i++) {
            ChannelBean channelBean = channelBeanList.get(i);
            if (channelBean.isSelect()) {
                //tb:是findViewById找到的tab;
                tb.addTab(tb.newTab().setText(channelBean.getName()));
                if (i == 0) {
                    fragmentList.add(Fragment1.getInstances(channelBean.getName()));
                }else if (i == 1){
                    fragmentList.add(Fragment2.getInstances(channelBean.getName()));
                }else {
                    fragmentList.add(BlankFragment.getInstances(channelBean.getName()));
                }

            }

        }

        mPagerAdapter = new MPagerAdapter(getSupportFragmentManager());
        vp.setAdapter(mPagerAdapter);
        tb.setupWithViewPager(vp);


    }


    @Override
    protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {
        //得到 频道管理页返回的数据,是sjon形式
        String stringExtra = data.getStringExtra(ChannelActivity.RESULT_JSON_KEY);
        Gson gson = new Gson();
        Type type = new TypeToken<ArrayList<ChannelBean>>() {
        }.getType();   // 把json直接转换成集合;
        channelBeanList = gson.fromJson(stringExtra, type); // 吧json转换成集合

        tb.removeAllTabs(); //清空 tab
        fragmentList.clear();   //清空 所有Fragment

        // 重新生成新的tab, 重新生成新的Fragment;
        for (int i = 0; i < channelBeanList.size(); i++) {
            ChannelBean channelBean = channelBeanList.get(i);
            if (channelBean.isSelect()) {
                //tb:是findViewById找到的tab;
                tb.addTab(tb.newTab().setText(channelBean.getName()));
                if ("热点".equals(channelBean.getName())) {
                    fragmentList.add(Fragment1.getInstances(channelBean.getName()));
                }else if ("北京".equals(channelBean.getName())){
                    fragmentList.add(Fragment2.getInstances(channelBean.getName()));
                }else {
                    fragmentList.add(BlankFragment.getInstances(channelBean.getName()));
                }
            }
        }

        mPagerAdapter.notifyDataSetChanged();

    }

    private class MPagerAdapter extends FragmentPagerAdapter {
        public MPagerAdapter(FragmentManager fm) {
            super(fm);
        }

        @Override
        public Fragment getItem(int i) {
            return fragmentList.get(i);
        }

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

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

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity"
    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/tb"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        />

    <Button
        android:id="@+id/btn"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="+"/>
    </LinearLayout>
    <android.support.v4.view.ViewPager
        android:id="@+id/vp"
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="1"
        />
</LinearLayout>