Retrofit+RXJava_多线程下载视频列表

BaseService：

public class BaseService {    private static OkHttpClient.Builder httpClient = new OkHttpClient.Builder();    private static Retrofit.Builder builder =            new Retrofit.Builder()                    .baseUrl("http://result.eolinker.com/")                    .addConverterFactory(GsonConverterFactory.create())                    .addCallAdapterFactory(RxJavaCallAdapterFactory.create());    public static <S> S createService(Class<S> serviceClass) {        Retrofit retrofit = builder.client(httpClient.build()).build();        return retrofit.create(serviceClass);    }}

API：

public interface RetrofitAPI {    @Streaming    @GET    Observable<ResponseBody> download(@Header("RANGE") String start, @Url String url);

}

Model接口：

public interface IDownLoadModel {        void getData(String start,String url,String url2,GetCallback callback);        interface GetCallback{            void GetComplete(ResponseBody responseBody);        }    }

Model实现类：

public class DownLoadModel implements IDownLoadModel {    String url3 = "";    private static final String DOWNLOAD_INIT = "1";    private static final String DOWNLOAD_ING = "2";    private static final String DOWNLOAD_PAUSE = "3";    private String stateDownload = DOWNLOAD_INIT;//当前线程状态    private long pro;    public Progress progress;    @Override    public void getData(String start, String url, final String url2, GetCallback callback) {        this.url3 = url;        BaseService.createService(RetrofitAPI.class).download(start, url3)                .subscribeOn(Schedulers.io())                .observeOn(AndroidSchedulers.mainThread())                .subscribe(new Observer<ResponseBody>() {                    @Override                    public void onCompleted() {                    }                    @Override                    public void onError(Throwable e) {                    }                    @Override                    public void onNext(ResponseBody responseBody) {                        final long l = responseBody.contentLength();                        downloadTask(l, url2);                    }                });    }    public void downloadTask(final long length, String url2) {        final File file = new File(url2);        if (!file.exists()) {            try {                file.createNewFile();            } catch (IOException e) {                e.printStackTrace();            }        }        MainActivity.MAX_SIZE = length;        //例如  1000kb  3   333        int threadNum = 5;        long blockSize = length / threadNum;//        //四舍五入---  让一个数字+0。5在四舍五入 就变成 向上取整        //计算出下载块以后   创建线程执行下载操作        for (int i = 0; i < threadNum; i++) {            //计算开始位置            final long startPosition = blockSize * i;            //让最后一个线程下载的大小是正好的，  总长度 - 除了最后一个块的大小和            if (i == threadNum - 1) {                blockSize = length - blockSize * (threadNum - 1);            }            String range = "bytes=" + startPosition + "-" + (startPosition + blockSize - 1);            BaseService.createService(RetrofitAPI.class).download(range, url3)                    .subscribeOn(Schedulers.io())                    .observeOn(Schedulers.io())                    .subscribe(new Observer<ResponseBody>() {                        @Override                        public void onCompleted() {                        }                        @Override                        public void onError(Throwable e) {                        }                        @Override                        public void onNext(ResponseBody responseBody) {                            BufferedInputStream bis = new BufferedInputStream(responseBody.byteStream());                            RandomAccessFile raf = null;                            try {                                raf = new RandomAccessFile(file, "rwd");                                raf.seek(startPosition);                                byte[] buff = new byte[1024 * 8];                                int len = 0;                                while ((len = bis.read(buff)) != -1) {                                    raf.write(buff, 0, len);                                    pro += len;                                    final int l = (int) (pro * 100 / length);                                    handler.sendEmptyMessage(l);                                    Log.i("=======l", "onNext: " + l);                                    DownLoadActivity.progre = l;                                }                            } catch (Exception e) {                                e.printStackTrace();                            }                        }                    });        }    }    public void setProgress(Progress progress) {        this.progress = progress;    }    public interface Progress{        void updateProgress(int progress);    }    protected void onPause() {        stateDownload = DOWNLOAD_PAUSE;    }    /**     * 继续下载     */    protected void onStart() {        synchronized (DOWNLOAD_PAUSE) {            stateDownload = DOWNLOAD_ING;            DOWNLOAD_PAUSE.notifyAll();        }    }    Handler handler=new Handler(){        @Override        public void handleMessage(Message msg) {                    progress.updateProgress(msg.what);        }    };}

View接口：

public interface IDownLoadView {    void getProgress(int a);    void getData(ResponseBody responseBody);}

Presenter：

public class DownLoadPresenter  implements BasePresenter<IDownLoadView> {    SoftReference<IDownLoadView> srf;    DownLoadModel model;    public DownLoadPresenter(IDownLoadView view) {        model = new DownLoadModel();        attch(view);    }    public void down(final String start, final String url, final String url2) {        model.getData(start, url, url2, new IDownLoadModel.GetCallback() {            @Override            public void GetComplete(ResponseBody responseBody) {                srf.get().getData(responseBody);            }        });        model.setProgress(new DownLoadModel.Progress() {            @Override            public void updateProgress(int progress) {                srf.get().getProgress(progress);            }        });    }    @Override    public void attch(IDownLoadView view) {        srf = new SoftReference<IDownLoadView>(view);    }    @Override    public void deatch() {        srf.clear();    }}

Activity：

public class DownLoadActivity extends BaseActivity<DownLoadPresenter> implements IDownLoadView {    @BindView(R.id.wb)    VideoView wb;    @BindView(R.id.btn)    Button btn;    @BindView(R.id.pro)    ProgressBar pro;    @BindView(R.id.tv)    TextView tv;    private String uri;    public static long progre;    private String s;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_down_load);        ButterKnife.bind(this);        Intent intent = getIntent();        uri = intent.getStringExtra("uri");        wb.setMediaController(new MediaController(this));//        wb.setVideoURI(Uri.parse(uri));        wb.requestFocus();        btn.setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View view) {                s = getCacheDir() + "haha1.mp4";                presenter.down(String.valueOf(0), uri, s);            }        });    }    @Override    void createPresenter() {        presenter = new DownLoadPresenter(this);    }    @Override    public void getProgress(int a) {        pro.setProgress(a);        tv.setText(a+"%");        if(tv.getText().toString().equals("100%")){            Log.i("======tv", "getProgress: "+tv);            wb.setVideoPath(s);            wb.start();        }    }    @Override    public void getData(ResponseBody responseBody) {    }}