我尝试将文件下载到手机的 SD 卡中。在 Android 2.1、2.2 和 2.3 上一切正常,但在 Android 4.0 上(在模拟器和我的 Galaxy Nexus 上测试)它抛出一个 FileNotFoundException
。
堆栈跟踪:
02-27 21:49:06.733: W/System.err(27648): java.io.FileNotFoundException: http://www.wdr.de/wdrlive/media/wdr5.m3u
02-27 21:49:06.733: W/System.err(27648): at libcore.net.http.HttpURLConnectionImpl.getInputStream(HttpURLConnectionImpl.java:177)
02-27 21:49:06.733: W/System.err(27648): at de.arvidg.test.StartActivity$9.run(StartActivity.java:833)
02-27 21:49:06.733: W/System.err(27648): at java.lang.Thread.run(Thread.java:856)
我下载文件的方法:
downloadFile("http://www.wdr.de/wdrlive/media/wdr5.m3u");
public void downloadFile(final String fileUrl) {
new Thread(new Runnable() {
@Override
public void run() {
try {
URL url = new URL(fileUrl);
HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();
urlConnection.setRequestMethod("GET");
urlConnection.setDoOutput(true);
urlConnection.connect();
// File cacheDir = appContext.getExternalCacheDir();
// File file = new File("/mnt/sdcard", "/cacheFile.ext");
File SDCardRoot = Environment.getExternalStorageDirectory();
File file = new File(SDCardRoot,"/cacheFile.ext");
if(!file.exists()) file.createNewFile();
FileOutputStream fileOutput = new FileOutputStream(file);
InputStream inputStream = urlConnection.getInputStream();
int totalSize = urlConnection.getContentLength();
int downloadedSize = 0;
byte[] buffer = new byte[1024];
int bufferLength = 0;
while ( (bufferLength = inputStream.read(buffer)) > 0 ) {
fileOutput.write(buffer, 0, bufferLength);
downloadedSize += bufferLength;
Log.d(TAG, "downloadedSize = " + downloadedSize + " | totalSize = " + totalSize);
// updateProgress(downloadedSize, totalSize);
}
fileOutput.close();
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
}).start();
}
最佳答案
简单删除 urlConnection.setDoOutput(true);
感谢 pfn @ #android-dev
关于java - Android 版本 > 2.3 上的 FileNotFoundException,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/9472425/