抽取基类

public class Utils {
private static Utils instance;
private Utils(){

}
public static Utils getInstance(){
    if (instance==null){
        synchronized (Utils.class){
            if (instance==null){
                instance = new Utils();

            }
        }
    }
    return instance;
}
//Handler
public void getRequest4(final String apiUrl, final Class clazzBean, final NetCallback callback) {
    new Thread(new Runnable() {
        @Override
        public void run() {
            final     = getRequest2(apiUrl, clazzBean);
            if (  != null) {
                mHandler.post(new Runnable() {
                    @Override
                    public void run() {
                        callback.onSuccess( );
                    }
                });
            } else {
                mHandler.post(new Runnable() {
                    @Override
                    public void run() {
                        callback.onFail(\"请求失败\");
                    }
                });
            }
        }
    }).start();
}
public void getRequest3(final String apiurl, final Class clazz, final UtilsCallback callback){
    new AsyncTask<String, Void,  >() {
        @Override
        protected   doInBackground(String... strings) {


            return getRequest2(strings[0], clazz);
        }

        @Override
        protected void onPostExecute(  o) {
            if (o==null){
                callback.onFail(\"请求失败\");
            }else {
                callback.onSuccess(o);

            }
        }
    }.execute(apiurl);
    //executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR, apiUrl);
}
public interface UtilsCallback<T>{
    void onSuccess(T o);
    void onFail(String msg);

}
 /**
 * 执行一个网络请求
 *
 * @param apiUrl
 * @param clazzBean
 * @param <T>
 * @return 返回Bean类
 */  

public T getRequest2(String apiurl,Class clazz){
o;
String request = getRequest(apiurl);
Gson gson = new Gson();
o = gson.fromJson(request, clazz);
return (T)o;
}
/**
* 执行一个网络请求
*
* @param apiUrl
* @return 返回Strinng结果
*/
public String getRequest(String apiurl){
String steam = “”;
try {
URL url = new URL(apiurl);
HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();
urlConnection.setRequestMethod(“GET”);
urlConnection.setConnectTimeout(5000);
urlConnection.setReadTimeout(5000);
int responseCode = urlConnection.getResponseCode();
if (responseCode==HttpURLConnection.HTTP_OK){
steam = getSteam(urlConnection.getInputStream());

        }

    } catch (Exception e) {
        e.printStackTrace();
    }
    return steam;
}

private String getSteam(InputStream inputStream) throws Exception {
    StringBuilder stringBuilder = new StringBuilder();
    InputStreamReader inputStreamReader = new InputStreamReader(inputStream);
    BufferedReader bufferedReader = new BufferedReader(inputStreamReader);
    for (String tmp = bufferedReader.readLine();tmp != null;tmp = bufferedReader.readLine()){
        stringBuilder.append(tmp);
    }
    return stringBuilder.toString();
}

}
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## Activity

public abstract class Activity extends AppCompatActivity {
@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(getLayoutResId());
initData();
initView();
}
protected abstract int getLayoutResId();
protected abstract void initData();
protected abstract void initView();
}
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## Fragment

public abstract class Fragment extends Fragment {
@Nullable
@Override
public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
return inflater.inflate(getLayoutResId(),container,false);
}

@Override
public void onViewCreated(@NonNull View view, @Nullable Bundle savedInstanceState) {
    super.onViewCreated(view, savedInstanceState);
    initData();
    initView(view);
}
protected abstract int getLayoutResId();
protected abstract void initData();
protected abstract void initView(View view);

}

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##App

public class App extends Application {

//Activity    Service    Receive   前回调
//在contentprovider 后调用
@Override
public void onCreate() {
    super.onCreate();
    //全局图片如何显示
    DisplayImageOptions options = new DisplayImageOptions.Builder()
            .cacheInMemory(true)
            .cacheOnDisk(true)
            .showImage ing(R.mipmap.ic_launcher)
            .showImageOnFail(R.mipmap.ic_launcher)
            .showImageForEmptyUri(R.mipmap.ic_launcher)
            .bitmapConfig(Bitmap.Config.RGB_565)
            .build();

    ImageLoaderConfiguration configuration = new ImageLoaderConfiguration.Builder(this)
            .memoryCacheSizePercentage(20)
            .diskCache(new UnlimitedDiskCache(new File(getCacheDir(), \"images\")))
            .defaultDisplayImageOptions(options)
            .build();

    ImageLoader.getInstance().init(configuration);
}

//应用结束回调    真实设备上不会回调
@Override
public void onTerminate() {
    super.onTerminate();
}


//当内存过低的时候调用
@Override
public void onLowMemory() {
    //释放内存
    super.onLowMemory();
}

}
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##tab+viewpager

public class FragmentTwo extends Fragment{

private ViewPager pager;
private TabLayout tab;

@Override
protected int getLayoutResId() {
    return R.layout.fragmenttwo;
}

@Override
protected void initData() {

}

@Override
protected void initView(View view) {
    pager = view.findViewById(R.id.pager);
    tab = view.findViewById(R.id.tab);
    pager.setAdapter(new Tabadapter(getChildFragmentManager()));
    tab.setupWithViewPager(pager);
}

}

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##请求数据

public class FragmentFive extends Fragment{
private PullToRefreshListView pull;
private Myadapter myadapter;

@Override
protected int getLayoutResId() {
    return R.layout.fragmentfive;
}



@Override
protected void initView(View view) {
    pull = view.findViewById(R.id.pull);
    myadapter = new Myadapter(getActivity());
    pull.setAdapter(myadapter);
    pull.onRefreshComplete();
    pull.setOnRefreshListener(new PullToRefresh .OnRefreshListener2<ListView>() {
        @Override
        public void onPullDownToRefresh(PullToRefresh <ListView> refreshView) {
            page=1;
            initData();
        }

        @Override
        public void onPullUpToRefresh(PullToRefresh <ListView> refreshView) {
            initData();
        }
    });
}
private int page=1;
private final int count = 10;
private String relase=\"http://172.17.8.100/movieApi/movie/v1/findReleaseMovieList?\";
private String hot=\"http://172.17.8.100/movieApi/movie/v1/findHotMovieList?\";

@Override
protected void initData() {
    Utils.getInstance().getRequest3(hot+\"page=\"+page+\"&count=\"+count,NewHot.class, new Utils.UtilsCallback<NewHot>() {
        @Override
        public void onSuccess(NewHot o) {
            if (page==1){
                myadapter.setHot(o.getResult());
            }else {
                myadapter.addHot(o.getResult());
            }
            page++;
            pull.onRefreshComplete();

        }

        @Override
        public void onFail(String msg) {
            pull.onRefreshComplete();
            Toast.makeText(getActivity(),\"请求Hot错误\",Toast.LENGTH_SHORT).show();
        }
    });
}

}

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##tab适配器

public class Tabadapter extends FragmentPagerAdapter {
private String[] s = new String[]{
“正在热映”,“即将热映”
};
public Tabadapter(FragmentManager fm) {
super(fm);
}

@Override
public Fragment getItem(int i) {
    switch (i){
        case 0:
            return new FragmentOne();
        case 1:
         return new FragmentThree();
    }
    return null;
}

@Override
public int getCount() {
    return s.length;
}

@Nullable
@Override
public CharSequence getPage (int position) {
    return s[position];
}

}

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##列表适配器

public class Myadapter extends Adapter {
private Context context;
private List<NewHot.HotBean> hot;

public Myadapter(Context context) {
    this.context = context;
    this.hot = new ArrayList<>();
   
}

public void setHot(List<NewHot.HotBean> hot) {
    if (hot!=null){
        this.hot = hot;
    }
    notifyDataSetChanged();
}
public void addHot(List<NewHot.HotBean> hot){
    if (hot!=null){
        this.hot.addAll(hot);
    }
    notifyDataSetChanged();
}


@Override
public int getCount() {
    return hot.size();
}

@Override
public   getItem(int position) {
    return hot.get(position);
}

@Override
public long getItemId(int position) {
    return position;
}

@Override
public View getView(int position, View convertView, ViewGroup parent) {
    HotViewHolder hotViewHolder;
    if (convertView==null){
        convertView = LayoutInflater.from(context).inflate(R.layout.hot_item,parent,false);
        hotViewHolder = new HotViewHolder(convertView);
    }else {
        hotViewHolder = (HotViewHolder) convertView.getTag();
    }
    hotViewHolder.bindHot((NewHot.HotBean) getItem(position));
    return convertView;
}
class HotViewHolder{
    TextView hname,hdata;
    ImageView hiv_img;

    public HotViewHolder(View convertView) {
        hname = convertView.findViewById(R.id.hname);
        hdata = convertView.findViewById(R.id.hdata);
        hiv_img = convertView.findViewById(R.id.hiv_img);
        convertView.setTag(this);
    }

    public void bindHot(NewHot.HotBean item) {
        hname.setText(item.getName());
        hdata.setText(item.getSummary());
        ImageLoader.getInstance().displayImage(item.getImageUrl(),hiv_img);
    }
}

}

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##viewpager 和 列表 适配器

public class Infoadapter extends Adapter {
private Context context;
private List<BannerBean.Data> banner;
private List<NewsBean.ResultBean> news;

public Infoadapter(Context context) {
    this.context = context;
    banner = new ArrayList<>();
    news = new ArrayList<>();
}

public void setBanner(List<BannerBean.Data> banner) {
    if (banner!=null) {
        this.banner = banner;
        notifyDataSetChanged();
    }
}
public void setNews(List<NewsBean.ResultBean> news) {
    if (news!=null) {
        this.news = news;

    }notifyDataSetChanged();
}
public void addNews(List<NewsBean.ResultBean> news){
    if (news!=null) {
        this.news.addAll(news);

    }
    notifyDataSetChanged();
}
@Override
public int getViewTypeCount() {
    return 2;
}

@Override
public int getItemViewType(int position) {
    if (banner.size()>0&&position==0){
        return 0;
    }
    return 1;
}

@Override
public int getCount() {
    return banner.size()>0?news.size()+1:news.size();
}


@Override
public NewsBean.ResultBean getItem(int position) {
   if (banner.size()>0){
        if (position==0){
            return null;
        }

return news.get(position-1);
}
return news.get(position);
}

@Override
public long getItemId(int position) {

    return position;
}

@Override
public View getView(int position, View convertView, ViewGroup parent) {
    if (getItemViewType(position)==0){
        bannerViewHolder bannerviewHolder;
        if (convertView==null){
            convertView = LayoutInflater.from(context).inflate(R.layout.banner_item,parent,false);
            bannerviewHolder = new bannerViewHolder(convertView);
        }else {
            bannerviewHolder = (bannerViewHolder) convertView.getTag();
        }

        bannerviewHolder.bindBanner(banner);
    }else {
    newsViewHolder newsviewHolder;
    if (convertView == null) {
        convertView = LayoutInflater.from(context).inflate(R.layout.list_item, parent, false);
        newsviewHolder = new newsViewHolder(convertView);
    } else {
        newsviewHolder = (newsViewHolder) convertView.getTag();
    }
    newsviewHolder.bindnews(getItem(position));

}
return convertView;
}
class bannerViewHolder{
private Mybanneradapter mybanneradapter;
ViewPager bannerpager;
private Handler handler = new Handler(){
@Override
public void handleMessage(Message msg) {
int i =0;
if (msg.what==1){
i = bannerpager.getCurrentItem();
i++;
bannerpager.setCurrentItem(i);
handler.sendEmptyMessageDelayed(1,3000);
}
}
};

    public bannerViewHolder(View convertView) {
        bannerpager = convertView.findViewById(R.id.bannerpager);
        mybanneradapter = new Mybanneradapter();
        bannerpager.setAdapter(mybanneradapter);
        convertView.setTag(this);
    }

    public void bindBanner(List<BannerBean.Data> item) {
        mybanneradapter.setList(item);
        handler.removeMessages(1);
        if (item.size()>1){

            bannerpager.setCurrentItem(item.size()*5000);

            handler.sendEmptyMessageDelayed(1,3000);
        }

    }
}
class newsViewHolder{
    TextView name,summary;
    ImageView icon;

    public newsViewHolder(View convertView) {
        name = convertView.findViewById(R.id.name);
        summary = convertView.findViewById(R.id.summary);
        icon = convertView.findViewById(R.id.icon);
        convertView.setTag(this);
    }

    public void bindnews(NewsBean.ResultBean item) {
        name.setText(item.getName());
        summary.setText(item.getSummary());
        ImageLoader.getInstance().displayImage(item.getImageUrl(),icon);
    }
}

}

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##请求数据 轮播和列表

public class InfoFragment extends Fragment{
private Infoadapter infoadapter;

private PullToRefreshListView pull;

@Override
protected void initView(View view) {

     pull = view.findViewById(R.id.pull);
     pull.setMode(PullToRefreshListView.Mode.BOTH);
    infoadapter = new Infoadapter(getActivity());
    pull.setAdapter(infoadapter);

    pull.setOnRefreshListener(new PullToRefresh .OnRefreshListener2<ListView>() {
         @Override
         public void onPullDownToRefresh(PullToRefresh <ListView> refreshView) {
             //刷新
             page=1;
             initData();
         }

         @Override
         public void onPullUpToRefresh(PullToRefresh <ListView> refreshView) {
            //加载
            requestNews();
         }
     });

}
private int page =1;
private final int count = 10;
private String bannerUrl = \"http://www.zhaoapi.cn/quarter/getAd\";
//page=1&count=10
private String newsUrl = \"http://172.17.8.100/movieApi/movie/v1/findHotMovieList?\";
@Override
protected void initData() {
    requestBanner();
    requestNews();
}

private void requestNews() {
    Utils.getInstance().getRequest3(newsUrl + \"page=\" + page + \"&count=\" + count,
            NewsBean.class, new Utils.NetCallback<NewsBean>() {
        @Override
        public void onSuccess(NewsBean o) {

            if (page==1){
                infoadapter.setNews(o.getResult());
            }else {
                infoadapter.addNews(o.getResult());
            }
            page++;
            pull.onRefreshComplete();
            if (o.getResult().size()<count){
                pull.setMode(PullToRefresh .Mode.PULL_FROM_START);
            }else {
                pull.setMode(PullToRefresh .Mode.BOTH);
            }
        }

        @Override
        public void onFail(String msg) {
            pull.onRefreshComplete();
            Toast.makeText(getActivity(), \"请求News错误\", Toast.LENGTH_SHORT).show();
        }
    });
}

private void requestBanner() {
    Utils.getInstance().getRequest3(bannerUrl, BannerBean.class, new Utils.NetCallback<BannerBean>() {
        @Override
        public void onSuccess(BannerBean o) {
            infoadapter.setBanner(o.getData());
        }

        @Override
        public void onFail(String msg) {
            Toast.makeText(getActivity(), \"请求Banner错误\", Toast.LENGTH_SHORT).show();
        }
    });
}

@Override
protected int getLayoutResId() {
    return R.layout.infofragment;
}

}