我当前的Android应用程序会下载许多音频文件。当我使用此代码执行下载时,我找不到文件异常:
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;
}
有人可以指出我哪里出错吗?