Adpter_showadpter
public class ShowAdapter extends RecyclerView.Adapter<ShowAdapter.MyViewHolder> implements View.OnClickListener{

   private  Context context;
   private List<Beans.DataBean> chalist;

   //利用接口回調實現點擊事件
   //再實例，然后創建方法
   private OnItemClickListener mOnItemClickListener = null;
   //點擊事件
   @Override
   public void onClick(View view) {
       if (mOnItemClickListener!=null){
           mOnItemClickListener.onItemClick(view, (Integer) view.getTag());
       }

   }
   public static interface OnItemClickListener {
       void onItemClick(View view , int position);
   }

   public ShowAdapter(Context context, List<Beans.DataBean> chalist) {
       this.context = context;
       this.chalist = chalist;
       Log.i("33333", "onBindViewHolder: "+chalist.size());
   }

   @Override
   public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
       View view=View.inflate(context, R.layout.rcy_item_line,null);
       MyViewHolder holder=new MyViewHolder(view);
       //調用點擊
       view.setOnClickListener(this);

       return holder;
   }

   @Override
   public void onBindViewHolder(MyViewHolder holder, int position) {

       holder.tv.setText(chalist.get(position).getContent());

//        String[] split = sousuolist.get(position).getImages().split("\\|");
//        DraweeController ff= Fresco.newDraweeControllerBuilder()
//               .setUri(String.valueOf(split[0]))
//                .setAutoPlayAnimations(true)
//                .build();
//        holder.iv.setController(ff);
     //  String s =chalist.get(position).getList().get(0).getImages().split("\\|")[0];
       DraweeController ff= Fresco.newDraweeControllerBuilder()
               .setUri(chalist.get(position).getImage_url())
               .setAutoPlayAnimations(true)
               .build();
       holder.iv.setController(ff);
       //把條目的下標position設置給holder
       holder.itemView.setTag(position);
      //ImageLoader.getInstance().displayImage(list.get(position).getList().get(0).getImages(),holder.iv);
   }

   public void setmOnItemClickListener(OnItemClickListener listener){
       this.mOnItemClickListener=listener;
   }

   @Override
   public int getItemCount() {
       return chalist.size();
   }

   class MyViewHolder extends RecyclerView.ViewHolder{

       public TextView tv;
       public SimpleDraweeView iv;
       public MyViewHolder(View itemView) {
           super(itemView);
           tv = itemView.findViewById(R.id.tv);
           iv = itemView.findViewById(R.id.img);
       }
   }
}
Img
public class Img extends ImageLoader {
   @Override
   public void displayImage(Context context, Object path, ImageView imageView) {
       Glide.with(context)
               .load(path)
               .into(imageView);
   }
}
model
public interface IModel {
   void setObSerVer(Observer obSerVer);
}
public class MyModel implements IModel{
   @Override
   public void setObSerVer(Observer obSerVer) {
       OkHttpClient okclient = new OkHttpClient.Builder().build();
       RetrofitManager.getInstance(RequestApi.BASE_URL,okclient)
               .setCreate(RequestApi.class)
               .getData()
               .observeOn(AndroidSchedulers.mainThread())
               .subscribeOn(Schedulers.io())
               .subscribe(obSerVer);
   }

}
Presenter
public class MyPresenter {
   IModel model;
   Iview view;

   public MyPresenter(Iview view) {
        this.view = view;
        model=new MyModel();
   }

   public void loadData(){
       model.setObSerVer(new Observer<Beans>() {
           @Override
           public void onCompleted() {

           }

           @Override
           public void onError(Throwable e) {
           //    Log.i("http:///", "onError: "+e);
           }

           @Override
           public void onNext(Beans  beans ) {
               List<Beans.DataBean> data = beans.getData();
               //  Log.i("http://///", "onNext: "+list.size());
               view.setData(data);

           }
       });
   }

}
view
public interface Iview {
   void setData(List<Beans.DataBean> beanList);
}
utils_Api
public class Api {

   public static final String BanUrl="http://result.eolinker.com/iYXEPGn4e9c6dafce6e5cdd23287d2bb136ee7e9194d3e9?uri=vedio";
}
utils_DialogUtils
public class DialogUtils {
   public static long MAX_SIZE = 0;
   public static long PROGRESS = -2;
 //  private static File file;
  private static String path;
   public static void showUpdataDialog(final Context context){
       AlertDialog.Builder builder = new AlertDialog.Builder(context);
       builder.setTitle("是否下載")
               .setMessage("下載吧")
               .setNegativeButton("以后再說", null)
               .setPositiveButton("立即下載", new DialogInterface.OnClickListener() {

                   @Override
                   public void onClick(DialogInterface dialogInterface, int i) {

//                        path= context.getCacheDir() + "/uri=vedio";
//                        new DownloadThread("http://result.eolinker.com/iYXEPGn4e9c6dafce6e5cdd23287d2bb136ee7e9194d3e9?uri=vedio", context.getCacheDir() + "/uri=vedio").start();
                      path= context.getCacheDir() + "/911Mothers_2010W-480p.mp4";
                      new DownloadThread("http://mirror.aarnet.edu.au/pub/TED-talks/911Mothers_2010W-480p.mp4", context.getCacheDir() + "/911Mothers_2010W-480p.mp4").start();
                       showProgress(context);
                   }
               }).show();
   }

    public static interface autopPlay {
        void autopplay(String path);
    }
        public static autopPlay play;
        public static void setPlay(autopPlay autopPlay){
            play=autopPlay;
        };



   public static void showProgress(final Context context){
       final ProgressDialog pd = new ProgressDialog(context);
       pd.setTitle("正在下載");
       pd.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
       pd.setMax(100);
       pd.show();

       new AsyncTask<String, Integer, String>(){

           @Override
           protected String doInBackground(String... strings) {

               while (PROGRESS+1 < MAX_SIZE){
                   SystemClock.sleep(100);
                   if (MAX_SIZE>0){
                       publishProgress((int)(PROGRESS * 100 / MAX_SIZE));
                   }
               }
               return null;
           }

           @Override
           protected void onPostExecute(String s) {
               super.onPostExecute(s);
               pd.dismiss();
            play.autopplay(path);

             //  file=new File(context.getCacheDir() + "/911Mothers_2010W-480p.mp4");

              // openApi(context,file);
               Toast.makeText(context,"下載完成",Toast.LENGTH_SHORT).show();
           }

           @Override
           protected void onProgressUpdate(Integer... values) {
               super.onProgressUpdate(values);
               pd.setProgress(values[0]);
           }
       }.execute();
   }
}
utils_RequestApi
public static final String BASE_URL = "http://result.eolinker.com/";

   @GET("iYXEPGn4e9c6dafce6e5cdd23287d2bb136ee7e9194d3e9?uri=vedio")
   Observable<Beans> getData();
utils_RetrofitManager
public class RetrofitManager {
   private Retrofit mRetrofit;
   private String baseUrl;
   OkHttpClient client;
   private static RetrofitManager mRetrofitManager;

   private RetrofitManager(String baseUrl,OkHttpClient client){
       this.baseUrl=baseUrl;
       this.client=client;
       initRetrofit();
   }
   public static synchronized RetrofitManager getInstance(String baseUrl,OkHttpClient client){
       if (mRetrofitManager == null){
           mRetrofitManager = new RetrofitManager(baseUrl,client);
       }
       return mRetrofitManager;
   }

   private void initRetrofit() {
       mRetrofit = new Retrofit.Builder()
               .baseUrl(baseUrl)
               .addConverterFactory(GsonConverterFactory.create())
               .addCallAdapterFactory(RxJavaCallAdapterFactory.create())
               .client(client)
               .build();
   }
   public <T> T setCreate(Class<T> reqServer){
       return mRetrofit.create(reqServer);
   }
}

activity
public class ShowActivity extends AppCompatActivity implements Iview {

   private Banner mBan;
   List<String> list = new ArrayList<>();
   private RecyclerView mRecy;
   private VideoView videoView;
   @Override
   protected void onCreate(Bundle savedInstanceState) {
       super.onCreate(savedInstanceState);
       //初始化 Fresco
       Fresco.initialize(this);
       setContentView(R.layout.activity_show);
       //隱藏標題
       ActionBar actionBar = getSupportActionBar();
       actionBar.hide();
       initView();
       okUrlBanner();
       MyPresenter presenter = new MyPresenter(this);
       presenter.loadData();
   }

   private void initView() {
       mBan = (Banner) findViewById(R.id.ban);
       mRecy = (RecyclerView) findViewById(R.id.recy);
      videoView= (VideoView) findViewById(R.id.video_view);
       //創建布局管理器
       LinearLayoutManager ll = new LinearLayoutManager(this);
       mRecy.setLayoutManager(ll);

   }

   //Banner輪播
   private void okUrlBanner() {
       OkHttpUtils.getInstance().doGet(Api.BanUrl, new OnUiCallback() {
           @Override
           public void onFailed(Call call, IOException e) {

           }

           @Override
           public void onSuccess(String result) throws IOException {
               Gson gson = new Gson();
               Beans beans = gson.fromJson(result, Beans.class);
               for (int i = 0; i < beans.getData().size(); i++) {
                   list.add(beans.getData().get(i).getImage_url());
               }
               mBan.setImageLoader(new Img());
               mBan.setImages(list);
               mBan.start();
           }
       });
   }

   //請求數據
   @Override
   public void setData(List<Beans.DataBean> beanList) {
       //創建適配器
       ShowAdapter showAdapter = new ShowAdapter(ShowActivity.this, beanList);
       mRecy.setAdapter(showAdapter);
         //條目點擊
       showAdapter.setmOnItemClickListener(new ShowAdapter.OnItemClickListener() {
           @Override
           public void onItemClick(View view, int position) {
               Toast.makeText(ShowActivity.this,"點擊下載播放",Toast.LENGTH_SHORT).show();
               DialogUtils.showUpdataDialog(ShowActivity.this);

               DialogUtils.setPlay(new DialogUtils.autopPlay() {
                   @Override
                   public void autopplay(String path) {
                       //播放視頻
                       Uri uri = Uri.parse(path);

                       videoView.setMediaController(new MediaController(ShowActivity.this));
                       videoView.setVideoURI(uri);
                       videoView.start();
                       videoView.requestFocus();
                   }
               });
           }
       });
   }
}
net_DownloadTask
public class DownloadTask extends Thread {
   String downloadUrl;
   String path;
   int blockSize;
   int startPosition;

   public DownloadTask(String downloadUrl, String path, int blockSize, int startPosition) {
       this.downloadUrl = downloadUrl;
       this.path = path;
       this.blockSize = blockSize;
       this.startPosition = startPosition;
   }

   @Override
   public void run() {
       NetUtils.downloadFile(downloadUrl,path,blockSize,startPosition);
   }
}
net_DownloadThread
public class DownloadThread extends Thread{
   private String downloadUrl = "";
   private String path;
   private int threadNum = 4;

   public DownloadThread(String downloadUrl, String path) {
       this.downloadUrl = downloadUrl;
       this.path = path;
   }

   @Override
   public void run() {
       int len = NetUtils.getFileLength(downloadUrl);
       DialogUtils.MAX_SIZE = len;

       //例如  1000kb  3   333
       int blockSize = len/threadNum;
//        //四舍五入---  讓一個數字+0。5在四舍五入 就變成 向上取整
//        int blockSize = (int) Math.round(tempSize + 0.5);

       //計算出下載塊以后   創建線程執行下載操作
       for (int i = 0; i < threadNum; i++) {
           //計算開始位置
           int startPosition = blockSize * i;
           //讓最后一個線程下載的大小是正好的，  總長度 - 除了最后一個塊的大小和
           if(i == threadNum - 1){
               blockSize = len - blockSize * (threadNum - 1);
           }
           new DownloadTask(downloadUrl, path, blockSize, startPosition).start();
       }


   }

   public void setThreadNum(int threadNum){
       this.threadNum = threadNum;
   }
}
net_NetUtils
public class NetUtils {
   public static void downloadFile(String downloadUrl, String path, int blockSize, int startPosition){
       BufferedInputStream bis = null;
       RandomAccessFile raf = null;
       try {
           File f = new File(path);
           if(!f.exists()){
               f.createNewFile();
           }
           URL url = new URL(downloadUrl);
           HttpURLConnection conn = (HttpURLConnection) url.openConnection();
           conn.setReadTimeout(8000);
           conn.setConnectTimeout(8000);

//            long start = 0;
           if(blockSize > 0){
//                //使用線程id來計算 當前線程的開始位置和結束位置
//                start = blockSize * threadId;
               long end = blockSize + startPosition - 1;
               //多線程下載  需要告訴服務器我要請求的是哪部分內容  需要寫在請求頭里面
               conn.setRequestProperty("Range", "bytes=" + startPosition + "-" + end);

               Log.i(Thread.currentThread() + "======", "bytes=" + startPosition + "-" + end);
           }


           int code = conn.getResponseCode();
           if(code < 400){
               bis = new BufferedInputStream(conn.getInputStream());
               raf = new RandomAccessFile(f, "rwd");

               raf.seek(startPosition);
               int len = 0;
               byte[] buff = new byte[1024 * 8];
               while((len = bis.read(buff)) != -1){
                   synchronized (NetUtils.class){

                       raf.write(buff, 0, len);
                       if ( DialogUtils.PROGRESS<0){
                           DialogUtils.PROGRESS = 0;
                       }
                       DialogUtils.PROGRESS += len;
                   }
               }
           }

       } catch (Exception e) {
           e.printStackTrace();
       }finally {
           if(bis != null){
               try {
                   bis.close();
               } catch (IOException e) {
                   e.printStackTrace();
               }
           }
           if(raf != null){
               try {
                   raf.close();
               } catch (IOException e) {
                   e.printStackTrace();
               }
           }
       }

   }

   public static int getFileLength(String downloadUrl){
       int len = 0;
       try {
           URL url = new URL(downloadUrl);
           HttpURLConnection conn = (HttpURLConnection) url.openConnection();
           conn.setReadTimeout(8000);
           conn.setConnectTimeout(8000);

           len = conn.getContentLength();
       } catch (Exception e) {
           e.printStackTrace();
       }
       return len;
   }
}