简单实现两个listView的联动效果(网络框架Retrofit+Rxjava)

看了网上更新的好多联动demo,感觉写的不是很简洁(表示不知道他们在说什么)

自己写了一个简单的Demo分享给大家- -!

效果图:

直接上车,少说废话!

所用到以下的这几个依赖,直接粘到Build.gradle文件中

compile 'com.squareup.picasso:picasso:2.5.2'compile 'io.reactivex:rxjava:1.2.7'compile 'io.reactivex:rxandroid:1.2.1'compile 'com.squareup.retrofit2:retrofit:2.2.0'compile 'com.squareup.retrofit2:converter-gson:2.2.0'compile 'com.squareup.retrofit2:adapter-rxjava:2.2.0'

1.定义首页的布局文件

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:id="@+id/activity_main"    android:orientation="horizontal"    android:layout_width="match_parent"    android:layout_height="match_parent"    tools:context="com.example.twolist.MainActivity">    <ListView        android:id="@+id/left"        android:layout_width="88dp"        android:background="#eaebec"        android:layout_height="match_parent" />    <ListView        android:id="@+id/right"        android:layout_width="match_parent"        android:layout_height="match_parent" /></LinearLayout>

2.MainActivity.java

package com.example.twolist;import android.support.v7.app.AppCompatActivity;import android.os.Bundle;import android.view.View;import android.widget.AbsListView;import android.widget.AdapterView;import android.widget.ListView;import com.example.twolist.adapters.LeftAdapter;import com.example.twolist.adapters.RightAdapter;import retrofit2.Retrofit;import retrofit2.adapter.rxjava.RxJavaCallAdapterFactory;import retrofit2.converter.gson.GsonConverterFactory;import rx.Observable;import rx.Subscriber;import rx.android.schedulers.AndroidSchedulers;import rx.schedulers.Schedulers;public class MainActivity extends AppCompatActivity{    /**     * 右侧电影列表的接口     * http://app.vmoiver.com/apiv3/post/getPostInCate?cateid=0&p=1     */    private ListView mLeft;    private ListView mRight;    private RightAdapter rightAdapter;    private LeftAdapter adapter;    //记录滑动的ListView 滑动的位置    private int scrollPosition = -1;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        initView();        getData();    }    private void getData() {        Retrofit retrofit = new Retrofit.Builder()                .addCallAdapterFactory(RxJavaCallAdapterFactory.create())                .addConverterFactory(GsonConverterFactory.create())                .baseUrl("http://app.vmoiver.com").build();        ApiService apiService = retrofit.create(ApiService.class);        Observable<ParaseData> apiServiceMovieList = apiService.getMovieList();        apiServiceMovieList.subscribeOn(Schedulers.io())                .observeOn(AndroidSchedulers.mainThread())                .subscribe(new Subscriber<ParaseData>() {                    @Override                    public void onCompleted() {                    }                    @Override                    public void onError(Throwable e) {                    }                    @Override                    public void onNext(ParaseData paraseData) {                        rightAdapter.addRes(paraseData.getData());                    }                });    }    private void initView() {        mLeft = (ListView) findViewById(R.id.left);        mRight = (ListView) findViewById(R.id.right);        adapter = new LeftAdapter(this);        mLeft.setAdapter(adapter);        rightAdapter = new RightAdapter(this, null);        mRight.setAdapter(rightAdapter);        mLeft.setOnItemClickListener(new AdapterView.OnItemClickListener() {            @Override            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {                adapter.setSelectItem(position);                mRight.setSelection(position);            }        });        mRight.setOnScrollListener(new AbsListView.OnScrollListener() {            @Override            public void onScrollStateChanged(AbsListView view, int scrollState) {            }            @Override            public void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount) {                if (scrollPosition != firstVisibleItem) {                    adapter.setSelectItem(firstVisibleItem);                    mLeft.setSelectionFromTop(firstVisibleItem, 40);                    scrollPosition = firstVisibleItem;                }            }        });    }}

3.左边ListView的适配器

package com.example.twolist.adapters;import android.content.Context;import android.graphics.Color;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import android.widget.BaseAdapter;import android.widget.TextView;import com.example.twolist.R;import java.util.ArrayList;import java.util.List;/** * Created by ALong on 2017/4/5. */public class LeftAdapter extends BaseAdapter {    List<String> data;    LayoutInflater inflater;    private int selectItem=0;    public void setSelectItem(int selectItem) {        this.selectItem = selectItem;        notifyDataSetChanged();    }    public LeftAdapter(Context context) {        data=new ArrayList<>();        for (int i = 0; i < 10; i++) {            data.add("电影"+i);        }        inflater=LayoutInflater.from(context);    }    @Override    public int getCount() {        return data!=null?data.size():0;    }    @Override    public String getItem(int position) {        return data.get(position);    }    @Override    public long getItemId(int position) {        return position;    }    @Override    public View getView(int position, View convertView, ViewGroup parent) {        ViewHolder holder;        if (convertView == null) {            convertView=inflater.inflate(R.layout.left_item,parent,false);            holder=new ViewHolder(convertView);            convertView.setTag(holder);        }else {            holder= (ViewHolder) convertView.getTag();        }        holder.mText.setText(data.get(position));        if (selectItem == position) {            holder.mText.setTextColor(Color.BLUE);            holder.mIndicator.setVisibility(View.VISIBLE);        }else {            holder.mText.setTextColor(Color.BLACK);            holder.mIndicator.setVisibility(View.INVISIBLE);        }        return convertView;    }    public static class ViewHolder{        TextView mText;        View mIndicator;        public ViewHolder(View itemView) {            mText= (TextView) itemView.findViewById(R.id.left_text);            mIndicator=itemView.findViewById(R.id.left_indicator);        }    }}

4.右边ListView的适配器

package com.example.twolist.adapters;import android.content.Context;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import android.widget.BaseAdapter;import android.widget.ImageView;import android.widget.TextView;import com.example.twolist.ParaseData;import com.example.twolist.R;import com.squareup.picasso.Picasso;import java.util.ArrayList;import java.util.List;/** * Created by ALong on 2017/4/5. */public class RightAdapter extends BaseAdapter {    List<ParaseData.DataBean> data;    LayoutInflater inflater;    Context context;    public RightAdapter(Context context, List<ParaseData.DataBean> data) {        this.context=context;        inflater = LayoutInflater.from(context);        if (data != null) {            this.data=data;        }else {            this.data=new ArrayList<>();        }    }    public void addRes(List<ParaseData.DataBean> data){        if (data != null) {            this.data.clear();            this.data.addAll(data);            notifyDataSetChanged();        }    }    @Override    public int getCount() {        return data.size();    }    @Override    public ParaseData.DataBean getItem(int position) {        return data.get(position);    }    @Override    public long getItemId(int position) {        return position;    }    @Override    public View getView(int position, View convertView, ViewGroup parent) {        ViewHolder holder;        if (convertView == null) {            convertView = inflater.inflate(R.layout.right_item, parent, false);            holder = new ViewHolder(convertView);            convertView.setTag(holder);        } else {            holder= (ViewHolder) convertView.getTag();        }        holder.mTitle.setText(getItem(position).getTitle());        holder.mMsg.setText(getItem(position).getTitle());        Picasso.with(context).load(getItem(position).getImage()).into(holder.mImg);        return convertView;    }    public static class ViewHolder {        ImageView mImg;        TextView mTitle;        TextView mMsg;        public ViewHolder(View itemView) {            mImg = (ImageView) itemView.findViewById(R.id.right_img);            mTitle = (TextView) itemView.findViewById(R.id.right_text);            mMsg = (TextView) itemView.findViewById(R.id.right_msg);        }    }}

5.Retrofit解析的接口文件

package com.example.twolist;import retrofit2.http.GET;import rx.Observable;/** * Created by ALong on 2017/4/5. */public interface ApiService {//可以使用参数的拼接,实现分页的加载,简单的Demo就不搞那么复杂了    @GET("/apiv3/post/getPostInCate?cateid=0&p=1")    Observable<ParaseData> getMovieList();}

6.Gson解析需要使用的类

package com.example.twolist;import java.util.List;/** * Created by ALong on 2017/4/5. */public class ParaseData {    private List<DataBean> data;    public List<DataBean> getData() {        return data;    }    public void setData(List<DataBean> data) {        this.data = data;    }    public static class DataBean {        private String title;        private String image;        public String getTitle() {            return title;        }        public void setTitle(String title) {            this.title = title;        }        public String getImage() {            return image;        }        public void setImage(String image) {            this.image = image;        }    }}

然后就没有然后了,6个步骤写完了