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 createService(Class serviceClass) {
Retrofit retrofit = builder.client(httpClient.build()).build();
return retrofit.create(serviceClass);
}
}API：
public interface RetrofitAPI {
@Streaming
@GET
Observable 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() {
@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() {
@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);
}
};
} public interface IDownLoadView {
void getProgress(int a);
void getData(ResponseBody responseBody);
}
Presenter：
public class DownLoadPresenter implements BasePresenter {
SoftReference 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(view);
}
@Override
public void deatch() {
srf.clear();
}
} Activity：
public class DownLoadActivity extends BaseActivity 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) {
}
}