Android——MVP+xRecyclerView+Retrofit+OkHttp+RxJava结合应用

一、效果图：

二、技能要求：

1. 如上图，使用 MVP+xRecyclerView+Retrofit+OkHttp+RxJava

接口：APIKEY=‘71e58b5b2f930eaf1f937407acde08fe’

http://api.tianapi.com/nba/?key=APIKEY&num=10

三、实现思路

1. 主页面显示一个xRecycleveiw实现分页加载

2. Retrofit访问网络接口获取数据

3. 添加动态代理

4. Rxjava异步处理数据

5. 设置适配器，将数据列表传入适配器

6. 重写适配器的4个方法，并在显示视图的方法中做优化

7. 在构造方法中初始化Fresco并做配置

8. 配置图片的显示方式为圆形显示

9. 在适配器显示视图的方法中通过Fresco来显示图片

添加依赖：

compile 'io.reactivex:rxjava:1.3.4'
compile 'io.reactivex:rxandroid:1.2.1'
compile 'com.squareup.retrofit2:retrofit:2.3.0'
compile 'com.squareup.retrofit2:converter-gson:2.3.0'
compile 'com.squareup.retrofit2:adapter-rxjava:2.3.0'
compile 'com.squareup.retrofit2:adapter-rxjava:2.3.0-beta4'
compile 'com.squareup.okhttp3:okhttp:3.9.0'
//compile project(':xrecyclerview')
compile 'com.facebook.fresco:fresco:0.12.0'//fresco
compile 'com.jcodecraeer:xrecyclerview:1.3.2'//xrecyclerview

配置权限：

<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS"/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>

代码：

service接口类

import retrofit2.http.GET;
import retrofit2.http.Query;
import rx.Observable;
/**
* Created by Wangrx on 2017/12/5.
*/
public interface BlogService {
@GET("nba/")
Observable<JavaBean> getUrl(@Query("key") String key, @Query("num") int num);
}

RetrofitUtils（封装retrofit网络请求）

import okhttp3.OkHttpClient;
import retrofit2.Retrofit;
import retrofit2.adapter.rxjava.RxJavaCallAdapterFactory;
import retrofit2.converter.gson.GsonConverterFactory;
/**
* Created by Wangrx on 2017/12/5.
*/
public class RetrofitUtils {
private static volatile RetrofitUtils instance;
private Retrofit retrofit;
private RetrofitUtils(){
}
private RetrofitUtils(String baseUrl){
OkHttpClient client = new OkHttpClient();
retrofit = new Retrofit.Builder()
.client(client)
.addCallAdapterFactory(RxJavaCallAdapterFactory.create())
.addConverterFactory(GsonConverterFactory.create())
.baseUrl(baseUrl)
.build();
}
public static RetrofitUtils getInstance(String baseUrl){
if (instance==null){
synchronized (RetrofitUtils.class){
if (null==instance){
instance = new RetrofitUtils(baseUrl);
}
}
}
return instance;
}
public static RetrofitUtils getInstance(){
if (null == instance){
return getInstance("http://api.tianapi.com/");
}
return instance;
}
public Retrofit getRetrofit(){
return retrofit;
}
}

NewsPresenter（逻辑层）

import java.util.List;
import retrofit2.Retrofit;
import rx.Subscription;
import rx.android.schedulers.AndroidSchedulers;
import rx.functions.Action1;
import rx.schedulers.Schedulers;
/**
* Created by Wangrx on 2017/12/5.
*/
public class NewsPresenter {
private NewsView inv;
private Subscription subscribe;
public void attachView(NewsView inv){
this.inv = inv;
}
public void getNews(String key,int num){
Retrofit retrofit = RetrofitUtils.getInstance().getRetrofit();
BlogService service = retrofit.create(BlogService.class);
subscribe = service.getUrl(key, num)
.subscribeOn(Schedulers.io())
.observeOn(AndroidSchedulers.mainThread())
.subscribe(new Action1<JavaBean>() {
@Override
public void call(JavaBean javaBean) {
List<JavaBean.NewslistBean> list = javaBean.getNewslist();
inv.success(list);
}
}, new Action1<Throwable>() {
@Override
public void call(Throwable throwable) {
inv.failed(throwable.getMessage());
}
});
}
public void detachView(){
// 当Activity销毁的时候取消订阅时间，防止内存泄漏
if (subscribe != null) {
if (subscribe.isUnsubscribed()) {
subscribe.unsubscribe();
}
}
if (inv!=null){
inv = null;
}
}
}

NewsView（数据接口成功/失败）

import java.util.List;
/**
* Created by Wangrx on 2017/12/5.
*/
public interface NewsView {
void success(List<JavaBean.NewslistBean> data);
void failed(String e);
}

MainActivity

public class MainActivity extends AppCompatActivity {
private List<JavaBean.NewslistBean> list = new ArrayList<>();
private int num=10;
private NewsPresenter presenter;
private MyAdapter adapter;
private XRecyclerView xRecyclerView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
xRecyclerView = (XRecyclerView) findViewById(R.id.recyclerview);
LinearLayoutManager layoutManager = new LinearLayoutManager(this);
layoutManager.setOrientation(LinearLayoutManager.VERTICAL);
xRecyclerView.setLayoutManager(layoutManager);
Fresco.initialize(this);
getData(num);
xRecyclerView.setPullRefreshEnabled(true);
xRecyclerView.setLoadingMoreEnabled(true);
xRecyclerView.setRefreshProgressStyle(ProgressStyle.BallSpinFadeLoader);
xRecyclerView.setLoadingMoreProgressStyle(ProgressStyle.Pacman);
xRecyclerView.setLoadingListener(new XRecyclerView.LoadingListener() {
@Override
public void onRefresh() {
new Handler().postDelayed(new Runnable(){
public void run() {
num=10;
getData(num);
xRecyclerView.refreshComplete();
}
}, 2000);
}
@Override
public void onLoadMore() {
new Handler().postDelayed(new Runnable(){
public void run() {
num+=10;
getData(num);
xRecyclerView.refreshComplete();
}
}, 2000);
}
});
}
public void getData(int count){
presenter = new NewsPresenter();
presenter.getNews("71e58b5b2f930eaf1f937407acde08fe", count);
presenter.attachView(new NewsView() {
@Override
public void success(List<JavaBean.NewslistBean> data) {
list.clear();
list.addAll(data);
Log.i("zzz", "success: " + list.toString());
if (adapter==null){
adapter = new MyAdapter(list, MainActivity.this);
xRecyclerView.setAdapter(adapter);
}else {
adapter.notifyDataSetChanged();
}
}
@Override
public void failed(String e) {
}
});
}
@Override
protected void onDestroy() {
super.onDestroy();
if (presenter!=null){
presenter.detachView();
}
}
}

MyAdapter(适配器)

/**
* Created by Wangrx on 2017/12/5.
*/
public class MyAdapter extends RecyclerView.Adapter<MyAdapter.ViewHolder> {
private List<JavaBean.NewslistBean> datas;
private Context context;
public MyAdapter(List<JavaBean.NewslistBean> datas, Context context) {
this.datas = datas;
this.context = context;
}
//创建新View，被LayoutManager所调用
@Override
public ViewHolder onCreateViewHolder(ViewGroup viewGroup, int viewType) {
View view = View.inflate(context, R.layout.item, null);
ViewHolder vh = new ViewHolder(view);
return vh;
}
//将数据与界面进行绑定的操作
@Override
public void onBindViewHolder(ViewHolder viewHolder, int position) {
viewHolder.item_img.setImageURI(datas.get(position).getPicUrl());
viewHolder.mTextView.setText(datas.get(position).getTitle());
}
//获取数据的数量
@Override
public int getItemCount() {
return datas.size();
}
//自定义的ViewHolder，持有每个Item的的所有界面元素
public static class ViewHolder extends RecyclerView.ViewHolder {
public TextView mTextView;
private SimpleDraweeView item_img;
public ViewHolder(View view) {
super(view);
mTextView = (TextView) view.findViewById(R.id.text);
item_img = view.findViewById(R.id.item_img);
}
}
}

fresco

<com.facebook.drawee.view.SimpleDraweeView
android:id="@+id/item_img"
android:layout_width="120dp"
android:layout_height="120dp"
fresco:roundAsCircle="true"
fresco:placeholderImage="@mipmap/ic_launcher"/>

--------------------- 本文来自 xy8199 的CSDN 博客，全文地址请点击：https://blog.csdn.net/xy8199/article/details/78726678?utm_source=copy

posted @ 2018-10-08 14:22 天涯海角路阅读(303) 评论(0) 收藏举报

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天涯海角路

Android——MVP+xRecyclerView+Retrofit+OkHttp+RxJava结合应用

一、效果图：

二、技能要求：

三、实现思路

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