read of Inputstream non stop when internet connection lost

问题

I'a using a asynctask to download file. It works normally until i turn off wifi connection (there are no other internet connection) of my android, download dialog still and no changes. When i check by log, i discover that function read() of inputstream is non stop. So how to check this case? here is my code:

URL url = new URL(this.url);
        URLConnection connection = url.openConnection();
        connection.setReadTimeout(1000);
        connection.connect();
        // this will be useful so that you can show a typical 0-100% progress bar
        int fileLength = connection.getContentLength();
        fileName = "temp.zip";

        // download the file
        InputStream input = new BufferedInputStream(connection.getInputStream());
        OutputStream output = new FileOutputStream(path+fileName);

        byte buffer[] = new byte[1024000];
        long total = 0;
        int count;
        Log.v("test download:","download in background");
        while (((count = input.read(buffer)) != -1)) {
            Log.v("test download:","read:"+count);
            total += count;
            publishProgress((int) (total * 100 / fileLength - 1));
            output.write(buffer, 0, count);
        }

回答1:

Since you already set a timeout by calling setReadTimeout(), you should get a SocketTimeoutException shortly after the connection dropped.

Do your code happen to maybe capture this exception silently?

回答2:

Your file download buffer size is too much byte buffer[] = new byte[1024]; is enough

when i try this Download a file with Android, and showing the progress in a ProgressDialog (top answer) with asynctask ,work fine, didn't get that problem

来源：https://stackoverflow.com/questions/11838849/read-of-inputstream-non-stop-when-internet-connection-lost

标签

android

android-asynctask

inputstream