ANDROID java.net.URLConnection中发送图像和数据在一次 [英] ANDROID java.net.URLConnection send image and data at once
本文介绍了ANDROID java.net.URLConnection中发送图像和数据在一次的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我使用java.net.URLConnection中发送图像，并使用POST方法的一些参数的服务器。我的code以下是工作正常发送图像到服务器，但我有点糊涂了附加一些参数发送到服务器一次。我跟着这里和<一个 href="http://stackoverflow.com/questions/2793150/how-to-use-java-net-urlconnection-to-fire-and-handle-http-requests">here但我想用我的code的不同方法。
i use java.net.URLConnection to send image and some parameters to server using POST method. My code below is works fine to send image to server, but i'm bit confused to attach some parameter and send to server in one time. I've followed here and here but i think its different method with my code.
下面是我的代码段code波纹管：
Here is my snippet code bellow :
import java.io.DataOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import android.app.Activity;
import android.app.ProgressDialog;
import android.util.Log;
import android.widget.Toast;
import com.yai.app.support.DialogHandler;
public class ThreadImageUploader {
private int serverResponseCode = 0;
private ProgressDialog dialog;
private Activity activity;
public ThreadImageUploader(ProgressDialog mProgressDialog, Activity mActivity){
dialog = mProgressDialog;
activity = mActivity;
}
public int uploadFile(final String sourceFileUri, final String upLoadServerUri) {
String fileName = sourceFileUri;
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(sourceFileUri);
if (!sourceFile.isFile()) {
dialog.dismiss();
Log.e("uploadFile", "Source File not exist : " + sourceFileUri);
activity.runOnUiThread(new Runnable() {
public void run() {
new DialogHandler().customDialog(activity, "ERROR", "Source File not exist : " + sourceFileUri);
}
});
return 0;
}
else{
try {
// open a URL connection to the Servlet
FileInputStream fileInputStream = new FileInputStream(sourceFile);
URL url = new URL(upLoadServerUri);
// Open a HTTP connection to the URL
conn = (HttpURLConnection) url.openConnection();
conn.setDoInput(true); // Allow Inputs
conn.setDoOutput(true); // Allow Outputs
conn.setUseCaches(false); // Don't use a Cached Copy
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("uploaded_file", fileName);
dos = new DataOutputStream(conn.getOutputStream());
dos.writeBytes(twoHyphens + boundary + lineEnd);
dos.writeBytes("Content-Disposition: form-data; name='uploaded_file';filename='"
+ fileName + "'" + lineEnd);
dos.writeBytes(lineEnd);
// create a buffer of maximum size
bytesAvailable = fileInputStream.available();
bufferSize = Math.min(bytesAvailable, maxBufferSize);
buffer = new byte[bufferSize];
// read file and write it into form...
bytesRead = fileInputStream.read(buffer, 0, bufferSize);
while (bytesRead > 0) {
dos.write(buffer, 0, bufferSize);
bytesAvailable = fileInputStream.available();
bufferSize = Math.min(bytesAvailable, maxBufferSize);
bytesRead = fileInputStream.read(buffer, 0, bufferSize);
}
// send multipart form data necesssary after file data...
dos.writeBytes(lineEnd);
dos.writeBytes(twoHyphens + boundary + twoHyphens + lineEnd);
// Responses from the server (code and message)
serverResponseCode = conn.getResponseCode();
String serverResponseMessage = conn.getResponseMessage();
Log.i("uploadFile", "HTTP Response is : " + serverResponseMessage + ": " + serverResponseCode);
if(serverResponseCode == 200){
activity.runOnUiThread(new Runnable() {
public void run() {
String message = "File Upload Completed.";
Toast.makeText(activity, message, Toast.LENGTH_SHORT).show();
}
});
}
//close the streams //
fileInputStream.close();
dos.flush();
dos.close();
} catch (MalformedURLException ex) {
dialog.dismiss();
ex.printStackTrace();
activity.runOnUiThread(new Runnable() {
public void run() {
Toast.makeText(activity, "MalformedURLException : : check script url.", Toast.LENGTH_SHORT).show();
}
});
Log.e("Upload file to server", "error: " + ex.getMessage(), ex);
} catch (Exception e) {
dialog.dismiss();
e.printStackTrace();
activity.runOnUiThread(new Runnable() {
public void run() {
Toast.makeText(activity, "Got Exception : see logcat ", Toast.LENGTH_SHORT).show();
}
});
Log.e("Upload file to server Exception", "Exception : " + e.getMessage(), e);
}
dialog.dismiss();
return serverResponseCode;
}
}
}
我怎么能在同一时间发送图像和一些参数的服务器？ 非常感谢。
How i can send image and some parameter to server in one time? many thanks.
推荐答案
最后，这里的我的问题的解决方案。在code段波纹管可以用它来上传图片和文本发送到服务器。也许这篇文章可以帮助别人：）
Finally, here its solution for my problem. The code snippet bellow can use to upload image and send text to server. Maybe this post can help others :)
下面是code：
public int uploadFile(final String sourceFileUri, final String upLoadServerUri, final String renameFile) {
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(sourceFileUri);
if (!sourceFile.isFile()) {
dialog.dismiss();
Log.e("uploadFile", "Source File not exist : " + sourceFileUri);
activity.runOnUiThread(new Runnable() {
public void run() {
new DialogHandler().customDialog(activity, "ERROR", "Source File not exist : " + sourceFileUri);
}
});
return 0;
}
else{
try {
// open a URL connection to the Servlet
FileInputStream fileInputStream = new FileInputStream(sourceFile);
URL url = new URL(upLoadServerUri);
// Open a HTTP connection to the URL
conn = (HttpURLConnection) url.openConnection();
conn.setDoInput(true); // Allow Inputs
conn.setDoOutput(true); // Allow Outputs
conn.setUseCaches(false); // Don't use a Cached Copy
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("uploaded_file", renameFile);
dos = new DataOutputStream(conn.getOutputStream());
// add parameters
dos.writeBytes(twoHyphens + boundary + lineEnd);
dos.writeBytes("Content-Disposition: form-data; name=\"type\""
+ lineEnd);
dos.writeBytes(lineEnd);
// assign value
dos.writeBytes("Your value");
dos.writeBytes(lineEnd);
dos.writeBytes(twoHyphens + boundary + lineEnd);
// send image
dos.writeBytes(twoHyphens + boundary + lineEnd);
dos.writeBytes("Content-Disposition: form-data; name='uploaded_file';filename='"
+ renameFile + "'" + lineEnd);
dos.writeBytes(lineEnd);
// create a buffer of maximum size
bytesAvailable = fileInputStream.available();
bufferSize = Math.min(bytesAvailable, maxBufferSize);
buffer = new byte[bufferSize];
// read file and write it into form...
bytesRead = fileInputStream.read(buffer, 0, bufferSize);
while (bytesRead > 0) {
dos.write(buffer, 0, bufferSize);
bytesAvailable = fileInputStream.available();
bufferSize = Math.min(bytesAvailable, maxBufferSize);
bytesRead = fileInputStream.read(buffer, 0, bufferSize);
}
// send multipart form data necesssary after file data...
dos.writeBytes(lineEnd);
dos.writeBytes(twoHyphens + boundary + twoHyphens + lineEnd);
// Responses from the server (code and message)
serverResponseCode = conn.getResponseCode();
String serverResponseMessage = conn.getResponseMessage();
Log.i("uploadFile", "HTTP Response is : " + serverResponseMessage + ": " + serverResponseCode);
if(serverResponseCode == 200){
activity.runOnUiThread(new Runnable() {
public void run() {
String message = "File Upload Completed.";
Toast.makeText(activity, message, Toast.LENGTH_SHORT).show();
}
});
}
//close the streams //
fileInputStream.close();
dos.flush();
dos.close();
} catch (MalformedURLException ex) {
dialog.dismiss();
ex.printStackTrace();
activity.runOnUiThread(new Runnable() {
public void run() {
Toast.makeText(activity, "MalformedURLException : : check script url.", Toast.LENGTH_SHORT).show();
}
});
Log.e("Upload file to server", "error: " + ex.getMessage(), ex);
} catch (Exception e) {
dialog.dismiss();
e.printStackTrace();
activity.runOnUiThread(new Runnable() {
public void run() {
Toast.makeText(activity, "Got Exception : see logcat ", Toast.LENGTH_SHORT).show();
}
});
Log.e("Upload file to server Exception", "Exception : " + e.getMessage(), e);
}
dialog.dismiss();
return serverResponseCode;
}
}
这篇关于ANDROID java.net.URLConnection中发送图像和数据在一次的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
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