Android Browser--use WebView for file download

Download monitor for current webview settings

Mcurrentwebview.setdownloadlistener (new  Downloadlistener () {    @Override    public void Ondownloadstart (finallong  contentlength) {    　　//  TODO Implement download Logic        log.e ("Ondownloadstart", "url===" + URL + "---useragent=" + useragent + "---contentdisposition=" + cont　　Entdisposition + "---mimetype=" + mimetype + "---contentlength=" + contentlength); }});

Download the file Core code:

Httpparams params =NewBasichttpparams (); Httpconnectionparams.setconnectiontimeout (params,5 * 1000); Httpconnectionparams.setsotimeout (params,5 * 1000); HttpGet HttpGet=Newhttpget (URL);Try{File File=NewFile (Environment.getexternalstoragedirectory (), fileName); if(!file.exists ())    {File.createnewfile (); } randomaccessfile randomfile=NewRandomaccessfile (file, "RW"); HttpResponse Response=Newdefaulthttpclient (params). Execute (httpget); Httpentity Entity=response.getentity (); InputStream in=entity.getcontent ();        Randomfile.seek (Randomfile.length ()); byte[] buffer =New byte[1024]; intLenght = 0;  while((lenght = in.read (buffer)) > 0) {randomfile.write (buffer,0, lenght); Debugtracetool.debugtracee ( This, "file length = =" +randomfile.length ());    } randomfile.close ();    Httpget.abort (); } Catch(Exception e) {e.printstacktrace ();}

Points to note:

1. You need to start a single thread and cannot perform a file download operation on the main thread.

2. Download the file name, length limit, the recommended file name length control at 100. Prevents the Ioexception:open failed:enametoolong (file name too long) error from appearing, causing the downloaded task to not start correctly. Cause: There is no limit to the length of the file name in the Java language specification. However, the operating system has a limit on the length of the file name, the most common is 255 bytes, this limit length includes the file name suffix, such as. mp3,.mkv.

Android Browser-use WebView for file download