我在写一个Android应用程序。此应用程序应通过POST将一些图片上传到我的服务器。 如果我使用小于1MB的图片，它会工作。 但是，如果我使用更大的图像，日志会告诉我图像已上传但图像不在服务器上。 post_max_size是4MB
我的方法来自stackoverflow解决方案，应该可以工作，但它没有，我不知道为什么。
// http post
ArrayList<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>();
nameValuePairs.add(new BasicNameValuePair("c_user_id", params[1]));
nameValuePairs.add(new BasicNameValuePair("c_task_id", params[2]));
nameValuePairs.add(new BasicNameValuePair("c_comment", params[3]));
try {
HttpClient httpclient = new DefaultHttpClient();
HttpPost httppost = new HttpPost(phpPath + "insert_task.php");
httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
HttpResponse response = httpclient.execute(httppost);
HttpEntity entity = response.getEntity();
} catch (Exception e) {
Log.e("log_tag", "Error in http connection" + e.toString());
this.cancel(true);
}
String Tag = "UPLOADER";
String urlString = phpPath + "upload_task.php?user_id=" + params[1]
+ "&task_id=" + params[2];
HttpURLConnection conn = null;
String exsistingFileName = params[0];
String lineEnd = "\r\n";
String twoHyphens = "--";
String boundary = "*****";
try {
// ------------------ CLIENT REQUEST
Log.e(Tag, "Inside second Method");
FileInputStream fileInputStream = new FileInputStream(new File(
exsistingFileName));
// open a URL connection to the Servlet
URL url = new URL(urlString);
// Open a HTTP connection to the URL
conn = (HttpURLConnection) url.openConnection();
// Allow Inputs
conn.setDoInput(true);
// Allow Outputs
conn.setDoOutput(true);
// Don't use a cached copy.
conn.setUseCaches(false);
// Use a post method.
conn.setRequestMethod("POST");
conn.setRequestProperty("Connection", "Keep-Alive");
conn.setRequestProperty("Content-Type",
"multipart/form-data;boundary=" + boundary);
DataOutputStream dos = new DataOutputStream(
conn.getOutputStream());
dos.writeBytes(twoHyphens + boundary + lineEnd);
dos.writeBytes("Content-Disposition: post-data; name=uploadedfile;filename="
+ exsistingFileName + "" + lineEnd);
dos.writeBytes(lineEnd);
Log.e(Tag, "Headers are written");
// create a buffer of maximum size
int bytesAvailable = fileInputStream.available();
int maxBufferSize = 1 * 1024;
int bufferSize = Math.min(bytesAvailable, maxBufferSize);
byte[] buffer = new byte[bufferSize];
buffer = new byte[bufferSize];
int bytesRead = fileInputStream.read(buffer, 0, bufferSize);
// Read file
Log.e("Image length", bytesAvailable + "");
try {
while (bytesRead > 0) {
try {
dos.write(buffer, 0, bufferSize);
} catch (OutOfMemoryError e) {
e.printStackTrace();
}
bytesAvailable = fileInputStream.available();
bufferSize = Math.min(bytesAvailable, maxBufferSize);
bytesRead = fileInputStream.read(buffer, 0, bufferSize);
}
} catch (Exception e) {
}
dos.writeBytes(lineEnd);
dos.writeBytes(twoHyphens + boundary + twoHyphens + lineEnd);
Log.i("File Name in Server : ", exsistingFileName);
fileInputStream.close();
dos.flush();
dos.close();
dos = null;
} catch (Exception ex) {
// Exception handling
Log.e("Send file Exception", ex.getMessage() + "");
ex.printStackTrace();
}