Android进阶之路 - 双列表联动展示

Moudel划分（班级 - 学生）

ClassModel

package com.advance.yongliu.linkagedata;

import java.util.List;

/**
 * author  YongLiu
 * date  2018/8/9.
 * desc:
 */

public class ClassModel {
    private int id;
    private String name;
    private List<StudentModel> list;

    public ClassModel() {
        super();
    }

    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public List<StudentModel> getList() {
        return list;
    }

    public void setList(List<StudentModel> list) {
        this.list = list;
    }
}

StudentModel

package com.advance.yongliu.linkagedata;

/**
 * author  YongLiu
 * date  2018/8/9.
 * desc:
 */

public class StudentModel {
    public String name;
    public int age;
    public int outId;

    public StudentModel() {
        super();
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public int getAge() {
        return age;
    }

    public void setAge(int age) {
        this.age = age;
    }

    public int getOutId() {
        return outId;
    }

    public void setOutId(int outId) {
        this.outId = outId;
    }
}

俩侧列表的adapter（这里我用的是BaseQuickAdapter，强烈建议你使用，很方便！扩展性也好！）

ClassAdapter

package com.advance.yongliu.linkagedata;

import android.graphics.Color;
import android.support.annotation.Nullable;

import com.chad.library.adapter.base.BaseQuickAdapter;
import com.chad.library.adapter.base.BaseViewHolder;

import java.util.List;

/**
 * author  YongLiu
 * date  2018/8/9.
 * desc:
 */

public class ClassAdapter extends BaseQuickAdapter<ClassModel, BaseViewHolder> {
    private int position;

    public ClassAdapter(int layoutResId, @Nullable List data) {
        super(layoutResId, data);
    }

    @Override
    protected void convert(BaseViewHolder helper, ClassModel item) {
        helper.setTextColor(R.id.tv_class_name, helper.getLayoutPosition() == position ? Color.parseColor("#8470FF") : Color.parseColor("#363636"));
        helper.setText(R.id.tv_class_name, item.getName());
    }

    public void setSelection(int pos) {
        this.position = pos;
        notifyDataSetChanged();
    }
}

StudentAdapter

package com.advance.yongliu.linkagedata;

import android.support.annotation.Nullable;

import com.chad.library.adapter.base.BaseQuickAdapter;
import com.chad.library.adapter.base.BaseViewHolder;

import java.util.List;

/**
 * author  YongLiu
 * date  2018/8/9.
 * desc:
 */

public class StudentAdapter extends BaseQuickAdapter<StudentModel, BaseViewHolder> {
    public StudentAdapter(int layoutResId, @Nullable List data) {
        super(layoutResId, data);
    }

    @Override
    protected void convert(BaseViewHolder helper, StudentModel item) {
        helper.setText(R.id.tv_name, item.getName()+"").setText(R.id.tv_age, item.getAge()+"");
    }
}

正式使用代码

MainActivity:

package com.advance.yongliu.linkagedata;

import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.util.Log;
import android.view.View;

import com.alibaba.fastjson.JSON;
import com.chad.library.adapter.base.BaseQuickAdapter;

import java.util.ArrayList;
import java.util.List;

public class MainActivity extends AppCompatActivity {
    private RecyclerView mRvClass;
    private RecyclerView mRvStudent;
    private ClassAdapter classAdapter;
    private StudentAdapter studentAdapter;
    private String jsonData;
    private List<StudentModel> studentList;
    private List<ClassModel> classAllList;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        simulationsData();
        initView();
        initData();
        initAdapter();
    }


    private void initView() {
        mRvClass = findViewById(R.id.rv_class);
        mRvStudent = findViewById(R.id.rv_student);
    }

    private void initData() {
        /**
         * 解析数据
         * */
        studentList = new ArrayList<>();
        classAllList = JSON.parseArray(jsonData, ClassModel.class);

        /**
         * 设置默认数据
         * */
        studentList.clear();
        studentList.addAll(classAllList.get(0).getList());
    }


    private void initAdapter() {
        classAdapter = new ClassAdapter(R.layout.class_layout, classAllList);
        mRvClass.setLayoutManager(new LinearLayoutManager(this));
        mRvClass.setAdapter(classAdapter);
        //设置默认的选取状态
        classAdapter.setSelection(0);

        studentAdapter = new StudentAdapter(R.layout.student_layout, studentList);
        mRvStudent.setLayoutManager(new LinearLayoutManager(this));
        mRvStudent.setAdapter(studentAdapter);

        /**
         * 左侧列表的事件处理
         * */
        classAdapter.setOnItemClickListener(new BaseQuickAdapter.OnItemClickListener() {
            @Override
            public void onItemClick(BaseQuickAdapter adapter, View view, int position) {
                classAdapter.setSelection(position);
                studentList.clear();
                studentList.addAll(classAllList.get(position).getList());
                studentAdapter.notifyDataSetChanged();
            }
        });
    }

    /**
     * 数据模拟 - 可忽略 ，一般这里的数据都是后台网络请求之后返回的
     */
    private void simulationsData() {
        List<ClassModel> classList = new ArrayList<>();
        List<StudentModel> studentList1 = new ArrayList<>();
        List<StudentModel> studentList2 = new ArrayList<>();

        for (int i = 0; i < 2; i++) {
            StudentModel studentModel = new StudentModel();
            studentModel.setName("小明" + i);
            studentModel.setAge(i);
            studentModel.setOutId(1);
            studentList1.add(studentModel);
        }

        for (int i = 0; i < 3; i++) {
            StudentModel studentModel = new StudentModel();
            studentModel.setName("小红" + i);
            studentModel.setAge(i);
            studentModel.setOutId(2);
            studentList2.add(studentModel);
        }

        ClassModel classModel = new ClassModel();
        classModel.setList(studentList1);
        classModel.setId(1);
        classModel.setName("一年级");

        ClassModel classMode2 = new ClassModel();
        classMode2.setList(studentList2);
        classMode2.setId(2);
        classMode2.setName("二年级");
        classList.add(classModel);
        classList.add(classMode2);

        jsonData = JSON.toJSONString(classList);
        Log.e("tag", jsonData);
    }
}

MainActivity 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"
    android:orientation="horizontal"
    tools:context="com.advance.yongliu.linkagedata.MainActivity">

    <android.support.v7.widget.RecyclerView
        android:id="@+id/rv_class"
        android:layout_width="90dp"
        android:layout_height="match_parent"/>

    <View
        android:layout_width="1dp"
        android:background="#363636"
        android:layout_height="match_parent"/>

    <android.support.v7.widget.RecyclerView
        android:id="@+id/rv_student"
        android:layout_width="match_parent"
        android:layout_marginLeft="10dp"
        android:layout_height="match_parent"/>
</LinearLayout>

Android进阶之路 - 双列表联动展示

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