InputStream不会关闭,也不会永远关闭

时间:2011-04-24 23:25:54

标签: android inputstream audio-streaming bufferedinputstream

我正在尝试将外部mp3下载到内部存储中。但是,我试图下载的文件很大,所以我试图以1MB的块下载它们,以便您可以在下载其余部分时开始播放它们。这是我的流代码:

    InputStream is = null;
    OutputStream os = null;

    try {
        HttpClient client = new DefaultHttpClient();
        HttpGet get = new HttpGet( url );
        HttpResponse response = client.execute( get );

        MyLog.d( "Connection established" );

        byte[] buffer = new byte[8192];
        is = new BufferedInputStream( response.getEntity().getContent(), buffer.length );
        os = openFileOutput( filename, MODE_PRIVATE );

        int size;
        int totalSize = 0;

        while (( size = is.read( buffer ) ) != -1 && totalSize < 1048576) {
            os.write( buffer, 0, size );
            totalSize += size;
        }

        MyLog.d( "Finished downloading mix - " + totalSize + " bytes" );
    }
    catch (ClientProtocolException e) {
        e.printStackTrace();
    }
    catch (IOException e) {
        e.printStackTrace();
    }
    finally {
        if ( os != null ) {
            try {
                os.flush();
                os.close();
            }
            catch (IOException e) {
                MyLog.e( "Failed to close output stream." );
            }
        }
        if ( is != null ) {
            try {
                is.close();
            }
            catch (IOException e) {
                MyLog.e( "Failed to close input stream." );
            }
        }
    }

它下载文件很好,但是当它到达finally语句中的is.close()时,它会挂起。如果我等待真的很长时间它最终会关闭。好像它仍在下载文件的其余部分。如何避免这种情况并立即关闭流?

1 个答案:

答案 0 :(得分:7)

使用HTTP,您通常仍需要读取(并丢弃)整个响应流的其余部分 - 您不能只关闭。必须消耗整个流。我不确定Android的httpclient是基于公共httpclient 3还是4 - 4你可以使用HttpUriRequest#abort()提前结束。不确定3是否有这样的选项

编辑:查看它看起来像httpclient 3,你可以做httpget.abort()

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