android - 将android中的大文件发布到服务器

Question

我必须从 Android 应用程序向服务器发送大于 10MB 的大文件。它为我提供了大文件的OutOfMemory 异常。我已经尝试了很多解决方案，但没有任何效果。这是我的代码，适用于小文件。

        HttpURLConnection conn = null;
        DataOutputStream dos = null;  
        String lineEnd = "\r\n";
        String twoHyphens = "--";
        String boundary = "*****";
        int bytesRead, bytesAvailable, bufferSize;
        byte[] buffer;
        int maxBufferSize = 1 * 1024 * 1024; 
        File sourceFile = new File(fileName); 

        if (!sourceFile.isFile()) {                                    
            Log.e("clusterFileUploaded", fileName);
        }

        try {

            FileInputStream fileInputStream = new FileInputStream(sourceFile);
            URL url = new URL(purl);

            conn = (HttpURLConnection) url.openConnection(); 
            conn.setDoInput(true); 
            conn.setDoOutput(true); 
            conn.setUseCaches(false); 
            conn.setRequestMethod("POST");
            conn.setRequestProperty("Connection", "Keep-Alive");
            conn.setRequestProperty("ENCTYPE", "multipart/form-data");
            conn.setRequestProperty("Content-Type", "multipart/form-data;boundary=" + boundary);
            conn.setRequestProperty("clusterFile", fileName); 

            dos = new DataOutputStream(conn.getOutputStream());

            dos.writeBytes(twoHyphens + boundary + lineEnd);         
            dos.writeBytes("Content-Disposition: form-data; name='clusterFile';filename="+ fileName +  lineEnd);

            dos.writeBytes(lineEnd);

            bytesAvailable = fileInputStream.available(); 

            bufferSize = Math.min(bytesAvailable, maxBufferSize);
            buffer = new byte[bufferSize];

            bytesRead = fileInputStream.read(buffer, 0, bufferSize);  
            int serverResponseCode = 0;
            while (bytesRead > 0) {
                dos.write(buffer, 0, bufferSize);
                dos.flush();
                bytesAvailable = fileInputStream.available();
                bufferSize = Math.min(bytesAvailable, maxBufferSize);
                bytesRead = fileInputStream.read(buffer, 0, bufferSize);   

            }

            dos.writeBytes(lineEnd);
            dos.writeBytes(twoHyphens + boundary + twoHyphens + lineEnd);

            DataInputStream is = new DataInputStream(conn.getInputStream());

            BufferedReader reader = new BufferedReader(new InputStreamReader(is));
            StringBuilder sb = new StringBuilder();

            String line = null;
            try {
                while ((line = reader.readLine()) != null) {
                    sb.append(line + "\n");
                }
            } catch (IOException e) {
                e.printStackTrace();
            } finally {
                try {
                    is.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }

            String sFileResp = sb.toString();

            serverResponseCode = conn.getResponseCode();
            String serverResponseMessage = conn.getResponseMessage();

            Log.i("uploadFile", "HTTP Response is : "
                    + serverResponseMessage + ": " + serverResponseCode+"::"+sFileResp);

            fileInputStream.close();
            dos.flush();
            dos.close();
            return  sFileResp;

        } catch (Exception e) {
            e.printStackTrace();
        }

服务器端接收大文件没有问题。我不想分块发送。我想在服务器端接收整个文件。

我已经绞尽脑汁好几天了，但没有运气。非常感谢任何帮助。

一揽子感谢

Answer 1

在这里您可以找到更多关于 android manages your app's memory 的信息。 .Android 限制应用程序可以使用的内存量。此限制因设备的 RAM 大小而异。发送大文件的唯一方法是分批发送。在这里你可以找到一个例子:Upload large file in Android without outofmemory error

希望对您有所帮助。