android应用下载文件

概述我当前的Android应用程序下载了许多音频文件.当我使用此代码执行下载时,出现找不到文件的异常：try{finalURLdownloadFileUrl=newURL("http://filelocation/url.m4a");finalHttpURLConnectionhttpURLConnection=(HttpURLConnection)downloadFileUrl.openConn

我当前的Android应用程序下载了许多音频文件.当我使用此代码执行下载时,出现找不到文件的异常：

try {    final URL downloadfileUrl = new URL("http://filelocation/url.m4a");    final httpURLConnection httpURLConnection = (httpURLConnection) downloadfileUrl.openConnection();    httpURLConnection.setRequestMethod("GET");    httpURLConnection.setDoOutput(true);    httpURLConnection.setConnectTimeout(10000);    httpURLConnection.setReadTimeout(10000);    httpURLConnection.connect();    mTrackDownloadfile = new file(Record.this.getCacheDir(), "mediafile");    mTrackDownloadfile.createNewfile();    final fileOutputStream fileOutputStream = new fileOutputStream(mTrackDownloadfile);    final byte buffer[] = new byte[16 * 1024];    final inputStream inputStream = httpURLConnection.getinputStream();    int len1 = 0;    while ((len1 = inputStream.read(buffer)) > 0) {        fileOutputStream.write(buffer, 0, len1);    }    fileOutputStream.flush();    fileOutputStream.close();} catch (final Exception exception) {    Log.i(TAG, "doInBackground - exception" + exception.getMessage());    exception.printstacktrace();    mTrackDownloadfile = null;}

当我使用此代码时,它可以正常工作：

try {    final URL downloadfileUrl = new URL("http://filelocation/url.m4a");    final URLConnection urlConnection = downloadfileUrl.openConnection();    mTrackDownloadfile = new file(PlayOpponent.this.getCacheDir(), "mediafile");    mTrackDownloadfile.createNewfile();    final fileOutputStream fileOutputStream = new fileOutputStream(mTrackDownloadfile);    final byte buffer[] = new byte[16 * 1024];    final inputStream inputStream = urlConnection.getinputStream();    int len1 = 0;    while ((len1 = inputStream.read(buffer)) > 0) {        fileOutputStream.write(buffer, 0, len1);    }    fileOutputStream.flush();    fileOutputStream.close();} catch (final Exception exception) {    Log.i(TAG, "doInBackground - exception" + exception.getMessage());    exception.printstacktrace();    mTrackDownloadfile = null;}

有人可以指出我要去哪里了吗？

解决方法:

根据这个blog去除

httpURLConnection.setDoOutput(true);

在您的代码中可以解决问题.据说这是ICS问题.

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