RecyclerView+Retrofit+RxJava

第一步导入依赖

implementation 'com.squareup.retrofit2:retrofit:2.4.0'
implementation 'com.squareup.retrofit2:converter-gson:2.0.2'
implementation 'io.reactivex.rxjava2:rxjava:2.0.1'
implementation 'io.reactivex.rxjava2:rxandroid:2.0.1'
implementation 'com.google.code.gson:gson:2.2.4'
implementation 'com.github.bumptech.glide:glide:4.9.0'
implementation 'com.android.support:design:27.1.1'
implementation 'com.squareup.retrofit2:adapter-rxjava2:2.3.0'

第二步添加网络请求权限

效果图

福利.jpg

main.xml中

item中

接口ApiServer

public interface ApiServer {
    String Url = "https://gank.io/api/data/%E7%A6%8F%E5%88%A9/10/";
    @GET("1")
    Observable getDatas();
}

Bean中

public class Bean {
/**
 * error : false
 * results : [{"_id":"5ccdbc219d212239df927a93","createdAt":"2019-05-04T16:21:53.523Z","desc":"2019-05-05","publishedAt":"2019-05-04T16:21:59.733Z","source":"web","type":"福利","url":"http://ww1.sinaimg.cn/large/0065oQSqly1g2pquqlp0nj30n00yiq8u.jpg","used":true,"who":"lijinshanmx"},{"_id":"5cc43919fc3326376038d233","createdAt":"2019-04-27T19:12:25.536Z","desc":"2019-04-27","publishedAt":"2019-04-27T19:12:51.865Z","source":"web","type":"福利","url":"https://ww1.sinaimg.cn/large/0065oQSqly1g2hekfwnd7j30sg0x4djy.jpg","used":true,"who":"lijinshanmx"},{"_id":"5c6a4ae99d212226776d3256","createdAt":"2019-02-18T06:04:25.571Z","desc":"2019-02-18","publishedAt":"2019-04-10T00:00:00.0Z","source":"web","type":"福利","url":"https://ws1.sinaimg.cn/large/0065oQSqly1g0ajj4h6ndj30sg11xdmj.jpg","used":true,"who":"lijinshanmx"},{"_id":"5c2dabdb9d21226e068debf9","createdAt":"2019-01-03T06:29:47.895Z","desc":"2019-01-03","publishedAt":"2019-01-03T00:00:00.0Z","source":"web","type":"福利","url":"https://ws1.sinaimg.cn/large/0065oQSqly1fytdr77urlj30sg10najf.jpg","used":true,"who":"lijinshanmx"},{"_id":"5c25db189d21221e8ada8664","createdAt":"2018-12-28T08:13:12.688Z","desc":"2018-12-28","publishedAt":"2018-12-28T00:00:00.0Z","source":"web","type":"福利","url":"https://ws1.sinaimg.cn/large/0065oQSqly1fymj13tnjmj30r60zf79k.jpg","used":true,"who":"lijinshanmx"},{"_id":"5c12216d9d21223f5a2baea2","createdAt":"2018-12-13T09:07:57.2Z","desc":"2018-12-13","publishedAt":"2018-12-13T00:00:00.0Z","source":"web","type":"福利","url":"https://ws1.sinaimg.cn/large/0065oQSqgy1fy58bi1wlgj30sg10hguu.jpg","used":true,"who":"lijinshanmx"},{"_id":"5bfe1a5b9d2122309624cbb7","createdAt":"2018-11-28T04:32:27.338Z","desc":"2018-11-28","publishedAt":"2018-11-28T00:00:00.0Z","source":"web","type":"福利","url":"https://ws1.sinaimg.cn/large/0065oQSqgy1fxno2dvxusj30sf10nqcm.jpg","used":true,"who":"lijinshanmx"},{"_id":"5bf22fd69d21223ddba8ca25","createdAt":"2018-11-19T03:36:54.950Z","desc":"2018-11-19","publishedAt":"2018-11-19T00:00:00.0Z","source":"web","type":"福利","url":"https://ws1.sinaimg.cn/large/0065oQSqgy1fxd7vcz86nj30qo0ybqc1.jpg","used":true,"who":"lijinshanmx"},{"_id":"5be14edb9d21223dd50660f8","createdAt":"2018-11-06T08:20:43.656Z","desc":"2018-11-06","publishedAt":"2018-11-06T00:00:00.0Z","source":"web","type":"福利","url":"https://ws1.sinaimg.cn/large/0065oQSqgy1fwyf0wr8hhj30ie0nhq6p.jpg","used":true,"who":"lijinshanmx"},{"_id":"5bcd71979d21220315c663fc","createdAt":"2018-10-22T06:43:35.440Z","desc":"2018-10-22","publishedAt":"2018-10-22T00:00:00.0Z","source":"web","type":"福利","url":"https://ws1.sinaimg.cn/large/0065oQSqgy1fwgzx8n1syj30sg15h7ew.jpg","used":true,"who":"lijinshanmx"}]
 */

private boolean error;
private List results;

public boolean isError() {
    return error;
}

public void setError(boolean error) {
    this.error = error;
}

public List getResults() {
    return results;
}

public void setResults(List results) {
    this.results = results;
}

public static class ResultsBean {
    /**
     * _id : 5ccdbc219d212239df927a93
     * createdAt : 2019-05-04T16:21:53.523Z
     * desc : 2019-05-05
     * publishedAt : 2019-05-04T16:21:59.733Z
     * source : web
     * type : 福利
     * url : http://ww1.sinaimg.cn/large/0065oQSqly1g2pquqlp0nj30n00yiq8u.jpg
     * used : true
     * who : lijinshanmx
     */

    private String _id;
    private String createdAt;
    private String desc;
    private String publishedAt;
    private String source;
    private String type;
    private String url;
    private boolean used;
    private String who;

    public String get_id() {
        return _id;
    }

    public void set_id(String _id) {
        this._id = _id;
    }

    public String getCreatedAt() {
        return createdAt;
    }

    public void setCreatedAt(String createdAt) {
        this.createdAt = createdAt;
    }

    public String getDesc() {
        return desc;
    }

    public void setDesc(String desc) {
        this.desc = desc;
    }

    public String getPublishedAt() {
        return publishedAt;
    }

    public void setPublishedAt(String publishedAt) {
        this.publishedAt = publishedAt;
    }

    public String getSource() {
        return source;
    }

    public void setSource(String source) {
        this.source = source;
    }

    public String getType() {
        return type;
    }

    public void setType(String type) {
        this.type = type;
    }

    public String getUrl() {
        return url;
    }

    public void setUrl(String url) {
        this.url = url;
    }

    public boolean isUsed() {
        return used;
    }

    public void setUsed(boolean used) {
        this.used = used;
    }

    public String getWho() {
        return who;
    }

    public void setWho(String who) {
        this.who = who;
    }
  }
}

Adapter适配器中

public class RlvHttpAdapter extends RecyclerView.Adapter{
private Context mContext;
private ArrayList mList;

public RlvHttpAdapter(Context context, ArrayList list) {
    this.mContext = context;
    this.mList = list;
}

@NonNull
@Override
public RecyclerView.ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
    View inflate = LayoutInflater.from(mContext).inflate(R.layout.item, null, false);
    return new ViewHolder(inflate);
}

@Override
public void onBindViewHolder(@NonNull RecyclerView.ViewHolder holder, int position) {
    ViewHolder viewHolder = (ViewHolder) holder;
    Bean.ResultsBean dataBean = mList.get(position);
    Glide.with(mContext).load(dataBean.getUrl()).into(viewHolder.mIv);
    viewHolder.mTv.setText(dataBean.getUrl());
}

@Override
public int getItemCount() {
    return mList.size();
}
class ViewHolder extends RecyclerView.ViewHolder{

    private final ImageView mIv;
    private final TextView mTv;

    public ViewHolder(View itemView) {
        super(itemView);
        mIv = itemView.findViewById(R.id.iv);
        mTv = itemView.findViewById(R.id.tv);
      }
    }
}

MainActivity中

public class MainActivity extends AppCompatActivity {

private RecyclerView mRlv;
private ArrayList mList;
private RlvHttpAdapter mAdapter;

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

private void initData() {
    Retrofit retrofit = new Retrofit.Builder()
            .baseUrl(ApiServer.Url)
            .addConverterFactory(GsonConverterFactory.create())
            .addCallAdapterFactory(RxJava2CallAdapterFactory.create())
            .build();
    ApiServer apiServer = retrofit.create(ApiServer.class);
    Observable datas = apiServer.getDatas();
    datas.subscribeOn(Schedulers.io())
            .observeOn(AndroidSchedulers.mainThread())
            .subscribe(new Observer() {
                @Override
                public void onSubscribe(Disposable d) {

                }

                @Override
                public void onNext(Bean value) {
                    List list = value.getResults();
                    mList.addAll(list);
                    mAdapter.notifyDataSetChanged();
                }

                @Override
                public void onError(Throwable e) {

                }

                @Override
                public void onComplete() {

                }
            });
}

private void initView() {
    mRlv = (RecyclerView) findViewById(R.id.rlv);
    LinearLayoutManager manager = new LinearLayoutManager(this);
    mRlv.setLayoutManager(manager);
    mList = new ArrayList<>();
    mAdapter = new RlvHttpAdapter(this,mList);
    mRlv.setAdapter(mAdapter);
  }
}