我必须从Android应用程序向服务器发送大于10MB的大文件。它给了我OutOfMemory exception
大文件。我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();
}
服务器端在接收大文件时没有问题。我不想发送大块的信息。我想在服务器端收到整个文件。
我沉溺了这么多天,但没有运气。任何帮助将非常感激。
捆绑谢谢
在这里你可以找到更多关于android manages your app's memory的信息。 Android限制了应用程序可以使用的内存量。根据设备的RAM大小,此限制因设备而异。发送大文件的唯一方法是将其发送到chucks。在这里你可以找到一个例子:Upload large file in Android without outofmemory error
希望能帮助到你。
添加一个方法conn.setChunkedStreamingMode(4096)
这可以确保您的数据以您定义的块大小上传,如果由于网络延迟,电池电量不足或信号强度波动导致一个块中断,则只上传部分块而不是整个文件。
注意:您可以更改块的大小,因为我已经给了4mb。