Mvp练习题电影滑动

最新推荐文章于 2025-02-16 15:23:58 发布

原创最新推荐文章于 2025-02-16 15:23:58 发布 · 485 阅读

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CC 4.0 BY-SA版权

本文介绍了一种通过随机选择页面加载视频，并使用MVP架构进行数据获取与展示的方法。利用Retrofit框架与RxJava技术实现异步数据请求，通过自定义适配器实现了ViewPager中视频内容的动态变化。

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final String catalogId = "402834815584e463015584e539330016";
 
String HOST = "http://api.svipmovie.com/front/
//影片分类
columns/getVideoList.do
参数：catalogId 分类id  已经给出
      pnum 传入  为能随机获取视频请传入getNextPage（），此方法已经给出
 
private int getNextPage() {
        if (SystemUtils.isNetworkConnected()) {
        page = StringUtils.getRandomNumber(1, 108);
    }
    return page;
}
public static int getRandomNumber(int min, int max) {
    return new Random().nextInt(max) % (max - min + 1) + min;
}   ////////////////////////////////////////////////////////////////接口

////////////////////////////////1

package com.example.zk2.view;
public interface Iview {
    void onSuccess(Object o);
    void onFailed(Exception e);
}

////////////////////////////////////2
package com.example.zk2.model;
import java.util.Map;
public interface Imodel {
    void getData(Map<String,String> map);
}
/////////////////////////////////////3
package com.example.zk2.persenter;
import java.util.Map;
public interface BasePresenter {
    void getData(Map<String,String> map);
}

//////////////////////////////////////4Bean类
//////////////////////////////////////5
package com.example.zk2.http;
import com.example.zk2.bean.Dabean;
import java.util.Map;
import io.reactivex.Flowable;
import retrofit2.http.POST;
import retrofit2.http.QueryMap;
public interface ApiService {
    @POST("columns/getVideoList.do")
    Flowable<Dabean> getNews(@QueryMap  Map<String, String> map);
}


////////////////////////////////////6
package com.example.zk2.http;
import retrofit2.Retrofit;
import retrofit2.adapter.rxjava2.RxJava2CallAdapterFactory;
import retrofit2.converter.gson.GsonConverterFactory;
public class RetrofitUtils {
    private  static  volatile RetrofitUtils instance;
    private final ApiService apiService;

    private RetrofitUtils(){
        Retrofit retrofit=new Retrofit.Builder()
                .addConverterFactory(GsonConverterFactory.create())
                .addCallAdapterFactory(RxJava2CallAdapterFactory.create())
                .baseUrl("http://api.svipmovie.com/front/")
                .client(new OkHttpClient.Builder().build())
                .build();        apiService = retrofit.create(ApiService.class);   
 }    
public static  RetrofitUtils getInstance(){  
      if (instance==null){      
      synchronized (RetrofitUtils.class){     
           if (null==instance){          
          instance=new RetrofitUtils();       
         }            }        }      
  return  instance;    }  
  public ApiService getApiService(){    
    return  apiService;    }}

///////////////////////////////////////7
package com.example.zk2.model;
import android.util.Log;
import com.example.zk2.bean.Dabean;
import com.example.zk2.http.RetrofitUtils;
import com.example.zk2.persenter.NewsPresenter;
import java.util.Map;
import io.reactivex.Flowable;
public class NewsModel implements Imodel {
    private NewsPresenter presenter;

    public NewsModel(NewsPresenter presenter){
        this.presenter=presenter;
    }
    @Override
    public void getData(Map<String, String> map) {
        Flowable<Dabean> news = RetrofitUtils.getInstance().getApiService().getNews(map);
        presenter.getNews(news);
        Log.e("TAG","请求==="+map.toString());
    }
}

////////////////////////////////////////8
package com.example.zk2.persenter;
import android.util.Log;
import com.example.zk2.bean.Dabean;
import com.example.zk2.model.Imodel;
import com.example.zk2.model.NewsModel;
import com.example.zk2.view.Iview;
import java.util.Map;
import io.reactivex.Flowable;
import io.reactivex.android.schedulers.AndroidSchedulers;
import io.reactivex.schedulers.Schedulers;
import io.reactivex.subscribers.DisposableSubscriber;
public class NewsPresenter implements BasePresenter{
    private Iview iv;
    private DisposableSubscriber subscriber;
    public  void attacView(Iview iv){
        this.iv=iv;
    }

    public void detachView(){
        if (iv!=null){
            iv=null;
        }
        if (subscriber!=null){//rxjava的防止内存泄漏
            if (!subscriber.isDisposed()){
                subscriber.isDisposed();
            }
        }
    }

    public void getNews(Flowable<Dabean> news){
        news.subscribeOn(Schedulers.io())
                .observeOn(AndroidSchedulers.mainThread())
                .subscribeWith(new DisposableSubscriber<Dabean>() {
                    @Override
                    public void onNext(Dabean dabean) {
                        if (dabean!=null){
                            Log.d("aaaaa", "onNext: ++++++"+dabean.toString());
                                iv.onSuccess(dabean);
                        }
                    }

                    @Override
                    public void onError(Throwable t) {

                    }

                    @Override
                    public void onComplete() {

                    }
                });
    }

    @Override
    public void getData(Map<String, String> map) {
        Imodel model=new NewsModel(this);//多态  this是当前的p层、
        model.getData(map);
        Log.e("TAG","sss");
    }
}
////////////////////////////////////////9
package com.example.zk2.adapter;
import android.support.v4.view.ViewPager;
import android.view.View;
public class ZoomOutPageTransformer implements ViewPager.PageTransformer {
    private static final float MIN_SCALE = 0.85f;
    private static final float MIN_ALPHA = 0.5f;
    @Override
    public void transformPage(View view, float position) {
        int pageWidth = view.getWidth();
        int pageHeight = view.getHeight();

        if (position < -1) { // [-Infinity,-1) 不可见状态
            // This page is way off-screen to the left.
            view.setAlpha(0); //透明度设置为0

        } else if (position <= 1) { // [-1,1] 可见状态，设置动画效果
            // Modify the default slide transition to shrink the page as well
            float scaleFactor = Math.max(MIN_SCALE, 1 - Math.abs(position));
            float vertMargin = pageHeight * (1 - scaleFactor) / 2;
            float horzMargin = pageWidth * (1 - scaleFactor) / 2;
            if (position < 0) {
                view.setTranslationX(horzMargin - vertMargin / 2);
            } else {
                view.setTranslationX(-horzMargin + vertMargin / 2);
            }

            // Scale the page down (between MIN_SCALE and 1)
            view.setScaleX(scaleFactor);
            view.setScaleY(scaleFactor);

            // Fade the page relative to its size.
            view.setAlpha(MIN_ALPHA +
                    (scaleFactor - MIN_SCALE) /
                            (1 - MIN_SCALE) * (1 - MIN_ALPHA));

        } else { // (1,+Infinity] 不可见状态
            // This page is way off-screen to the right.
            view.setAlpha(0);
        }
    }
}

///////////////////////////////////////////10
package com.example.zk2.fragment;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.support.v4.view.PagerAdapter;
import android.support.v4.view.ViewPager;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.TextView;
import com.bumptech.glide.Glide;
import com.example.zk2.R;
import com.example.zk2.adapter.ZoomOutPageTransformer;
import com.example.zk2.bean.Dabean;
import com.example.zk2.persenter.NewsPresenter;
import com.example.zk2.view.Iview;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Random;

public class Fragment3 extends Fragment implements Iview{

    private ViewPager viewPager;
    private NewsPresenter presenter;
    private Button button;
    private List<Dabean.RetBean.ListBean> list;
    private Map<String, String> map = new HashMap<>();
    private PagerAdapter pagerAdapter;

    @Nullable
    @Override
    public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.fragment3, container, false);
        viewPager = view.findViewById(R.id.vp);
        button =  view.findViewById(R.id.buton);
        return view;
    }

    @Override
    public void onActivityCreated(@Nullable Bundle savedInstanceState) {
        super.onActivityCreated(savedInstanceState);
        initView();
        viewPager.setPageTransformer(true, new ZoomOutPageTransformer());
        button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                if(list!=null){
                    list.clear();
                }
                initView();
                pagerAdapter.notifyDataSetChanged();
            }
        });


    }

    private void initView() {
        map.put("catalogId","402834815584e463015584e539330016");
        map.put("pnum",getpage()+"");
        presenter = new NewsPresenter();
        presenter.attacView(this);
        presenter.getData(map);
    }


    //防止内存泄漏
    @Override
    public void onDestroy() {
        super.onDestroy();
        if (presenter!=null){
            presenter.detachView();
        }
    }

    @Override
    public void onSuccess(Object o) {
        Dabean bean= (Dabean) o;
        list = bean.getRet().getList();
        pagerAdapter = new PagerAdapter() {
            @Override
            public int getCount() {
                return list.size();
            }

            @Override
            public boolean isViewFromObject(View view, Object object) {
                return view == object;
            }

            @Override
            public Object instantiateItem(ViewGroup container, int position) {
                Dabean.RetBean.ListBean listBean = list.get(position);
                View v = View.inflate(getActivity(), R.layout.item, null);
                ImageView img = v.findViewById(R.id.img);
                TextView title = v.findViewById(R.id.tv_title);
                TextView tvt = v.findViewById(R.id.name);
                title.setText(listBean.getTitle());
                tvt.setText(listBean.getDescription());
                Glide.with(getActivity()).load(listBean.getPic()).into(img);
                container.addView(v);
                Log.e("--------适配器的数据:", listBean.getTitle());
                return v;
            }

            @Override
            public void destroyItem(ViewGroup container, int position, Object object) {
                container.removeView((View) object);
            }
        };
        viewPager.setAdapter(pagerAdapter);
    }

    @Override
    public void onFailed(Exception e) {

    }
    //随机数
    private int getpage() {
        int max = 108;
        int min = 1;
        Random random = new Random();
        int s = random.nextInt(max) % (max - min + 1) + min;
        return s;
    }
}