Java implementation applies to Android file download thread class _java

Code is very simple and practical, here is no more nonsense, directly to the source code

Package android.mooc.tools;
Import Java.io.BufferedInputStream;
Import Java.io.File;
Import Java.io.RandomAccessFile;
Import Java.net.URL;
 
Import java.net.URLConnection;
 
Import Android.util.Log;
  public class Filedownloadthread extends Thread {private static final int buffer_size = 1024;
  Private URL URL;
  private file file;
  private int startposition;
  private int endposition;
  private int curposition;
  Used to identify whether the current thread is downloading complete private Boolean finished = false;
  private int downloadsize;
 
  Private Boolean state;
 
  Boolean destory;
  public Boolean isdestory () {return destory;
  } public void Setdestory (Boolean destory) {this.destory = Destory;
    Public filedownloadthread (URL url, file file, int startposition, int endposition) {this.url = URL;
    This.file = file;
    This.startposition = startposition;
    This.curposition = startposition;
    This.endposition = endposition;
  this.downloadsize = 0;
   @Override public void Run () { Destory = false;
    state = true;
    Bufferedinputstream bis = null;
    Randomaccessfile fos = null;
    byte[] buf = new Byte[buffer_size];
    URLConnection con = null;
      try {con = url.openconnection ();
      Con.setallowuserinteraction (TRUE);
      Set the starting point for the current thread download, end Con.setrequestproperty ("Range", "bytes=" + startposition + "-" + endposition);
      Con.setrequestproperty ("Accept", "*/*");
      Con.setrequestproperty ("Connection", "keep-alive");
      Con.setrequestproperty ("Accept-language", "ZH-CN");
      Con.setrequestproperty ("Charset", "UTF-8"); Con.setrequestproperty ("User-agent", "mozilla/4.0" (compatible; MSIE 8.0; Windows NT 5.2;
              trident/4.0. NET CLR 1.1.4322; "
 
      + ". NET CLR 2.0.50727;. NET CLR 3.0.04506.30;. NET CLR 3.0.4506.2152;. NET CLR 3.5.30729)");
      Random Read and write to files using Randomaccessfile in Java fos = new Randomaccessfile (file, rw);
      Sets the location at which to start writing files Fos.seek (startposition); bis = new BUFFEREDINPUtstream (Con.getinputstream ());
          Start the loop to read and write files as a stream while (Curposition < endposition) && (!destory)) {while (state = = False) {
        Sleep (2000);
        int len = bis.read (buf, 0, buffer_size);
          if (Len!=-1) {fos.write (buf, 0, Len);
          Curposition = curposition + len;
          if (Curposition > endposition) {downloadsize = Len-(curposition-endposition);
          else {downloadsize = Len;
      } log.i ("333", "Run" + "len=" + len);
      ///Download complete set to True this.finished = true;
      Bis.close ();
    Fos.close ();
    catch (Exception e) {e.printstacktrace ();
  } public boolean isstate () {return state;
 
  public void SetState (Boolean state) {this.state = state;
  public Boolean isfinished () {return finished;
  public int getdownloadsize () {return downloadsize; } public void Setdownloadsize (int downloadsize) {this.downloadsize = downloadsize;
 }
 
}

The above is the entire contents of this article, I hope you can enjoy.