我的应用程序中有一个异步下载器,但有时连接会丢失,尤其是当我使用移动连接并且文件很大(> 10 MB)时。有没有办法在下载停止时捕捉到,然后在完成下载的结果下强制它恢复?
这是异步任务doInBackground
:
protected String doInBackground(String... aurl) {
int count;
try {
URL url = new URL(aurl[0]);
URLConnection conexion = url.openConnection();
// conexion.setRequestProperty("Range", "bytes=" + downloaded + "-");
conexion.connect();
int lenghtOfFile = conexion.getContentLength();
pesoVideo = lenghtOfFile / 1048576;
output = "/sdcard/" + folderString + "/" + nomeFile + ".mp3";
InputStream input = new BufferedInputStream(url.openStream());
OutputStream output = new FileOutputStream(
VideoDownloaderBrowserActivity.this.output);
byte data[] = new byte[1024];
long total = 0;
while ((count = input.read(data)) != -1) {
total += count;
publishProgress("" + (int) ((total * 100) / lenghtOfFile));
output.write(data, 0, count);
}
output.flush();
output.close();
input.close();
} catch (Exception e) {
}
return null;
}
这是onProgressUpdate
:
protected void onProgressUpdate(String... progress) {
if (Integer.parseInt(progress[0]) > progresso) {
...
}
}