Download files under Android

Tag:android    file download    

public static void Downfile (final String URL) {new Thread () {public void run () {FILEOUTPUTSTR            EAM Os=null;              try{InputStream Input=null;            URLConnection httpurlconnection= new URL (URL). OpenConnection ();                    int contentlength = Httpurlconnection.getcontentlength ();        Input =httpurlconnection.getinputstream ();        File File = new file ("c:\\users\\administrator\\desktop\\apknew.apk"); If the destination file already exists, delete it.        Produces an effect that overwrites the old file if (file.exists ()) {file.delete ();        } OS = new FileOutputStream (file);          byte[] buffer = new byte[4*1024];                    The length of the data read int len;  while ((Len=input.read (buffer))! =-1) {os.write (Buffer,0,len);                    This cannot be written as Os.write (buffer)} os.flush ();              Os.close (); Input.close ();//You must not forget to close the input stream//log.v ("cmd", "File download complete, path:" +File.getabsolutepath ());        Update ();                                    System.out.println ("Download Complete");                } catch (Exception e) {//TODO auto-generated catch block E.printstacktrace ();    }finally{}}}.start (); }

Recently do the project with the file download, so Baidu has more than n download code, and then copy, I am here to download the APK, and repeatedly are files can be downloaded, but the installation of the APK is a parsing package error. Two errors were found by patient examination

！ 1. Input stream forgot to close

2, Os.write (Buffer,0,len) written os.write (buffer) Baidu came out of a lot of this is written, and Eclipse does not error what is the reason for expecting the great God guidance Ah!