Android OkHttp InputStream java.IOException.closed

Question

我使用a OkHttpClient来下载服务器上的数据库并将其复制到我的Android应用程序上,请求是可以的,我得到了很好的内容.

但是,当我尝试将byteStream我的文件写入我的文件时,我得到了一个java.IOException.closed.你知道我做错了什么吗？

Response httpResponse = webApiClient.execute(
    new WebApiRequest(WebApiMethod.DB_DOWNLOAD), context);

if (httpResponse.code() == 200)
{
    try 
    {
        InputStream inputStream = httpResponse.body().byteStream();
        File databasePath = context.getDatabasePath(Constant.DATABASE_NAME);
        FileOutputStream output = new FileOutputStream(databasePath);
        int bufferSize = 1024;
        byte[] buffer = new byte[bufferSize];
        int len;
        while ((len = inputStream.read(buffer)) != -1)
        {
            output.write(buffer, 0, len);
        }
        success = true;
    }
    catch (Exception exc)
    {
        Utils.DisplayException(exc, context);
    }
}

我也尝试ByteStream用a 来读我的BufferedSink但结果是一样的

BufferedSink sink = Okio.buffer(Okio.sink(databasePath));
sink.writeAll(httpResponse.body().source());
sink.close();

堆栈跟踪 :

java.io.IOException: closed
    at okio.RealBufferedSource$1.read(RealBufferedSource.java:367)
    at java.io.InputStream.read(InputStream.java:162)
    at com.org.dbconn.LoginActivity$DbDownloadTask.doInBackground(LoginActivity.java:475)
    at com.org.dbconn.LoginActivity$DbDownloadTask.doInBackground(LoginActivity.java:436)
    at android.os.AsyncTask$2.call(AsyncTask.java:288)
    at java.util.concurrent.FutureTask.run(FutureTask.java:237)
    at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:231)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
    at java.lang.Thread.run(Thread.java:818)

Answer 1

我找到了为什么流被关闭了,为了进行一些测试,我用a检查输出String的内容System.out.println,但是当你读取或打印输出时它会自动关闭流,这就是我收到错误的原因.

总之,使用stream记住一件事:读取或打印outputStream将关闭它.