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Tôi đang cố gắng tải video lên máy chủ, nhưng bất cứ khi nào tôi cố gắng tải lên phản hồi đang hiển thị null và trong logcat, nó hiển thị org.json.JSONException: Kết thúc đầu vào tại ký tự 0, thay vì trạng thái trả lời của tôi: thông điệp thành công: video được tải lên..có thể bất kỳ nội dung nào cho tôi biết sai lầm của tôi là gì? 
org.json.JSONException: Kết thúc đầu vào ở ký tự 0 của
public class VideoUpload extends Activity{
MediaController mc;
private static int SELECT_PICTURE = 1;
private String selectedImagePath="";
TextView messageText;
Button uploadButton;
int serverResponseCode = 0;
ProgressDialog dialog = null;
private static final String TAG_SUCCESS = "status";
private static final String TAG_MSG = "msg";
String imgs;
String btns;
String upLoadServerUri = null;
ThreadPolicy th = new ThreadPolicy.Builder().permitAll().build();
final String uploadFilePath = Environment.getExternalStorageDirectory().getPath();
private Button buttonLoadImage;
private VideoView img;
private String User_ID;
private String sta;
private String msg;
private HttpURLConnection conn = null;
private String result="";
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.layout_video);
StrictMode.setThreadPolicy(th);
User_ID=this.getIntent().getStringExtra("id");
System.out.println("photo upload user id"+User_ID);
img = (VideoView)findViewById(R.id.imgViewvid);
mc = new MediaController(this);
mc.setAnchorView(img);
buttonLoadImage = (Button) findViewById(R.id.buttonLoadvid);
buttonLoadImage.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View arg0) {
Intent intent = new Intent();
intent.setType("video/*");
intent.setAction(Intent.ACTION_GET_CONTENT);
startActivityForResult(Intent.createChooser(intent,"Select Picture"), SELECT_PICTURE);
}
});
uploadButton = (Button)findViewById(R.id.uploadButtonvid);
messageText = (TextView)findViewById(R.id.messageTextvid);
uploadButton.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
dialog = ProgressDialog.show(VideoUpload.this, "", "Uploading file...", true);
new Thread(new Runnable() {
public void run() {
runOnUiThread(new Runnable() {
public void run() {
messageText.setText("uploading started.....");
}
});
uploadFile(selectedImagePath);
}
}).start();
}
});
}
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
if (resultCode == RESULT_OK)
{
if (requestCode == SELECT_PICTURE)
{
Uri mVideoURI = data.getData();
selectedImagePath = getPath(mVideoURI);
messageText.setText(selectedImagePath);
System.out.println(requestCode);
System.out.println("Image Path : " + selectedImagePath);
img.setVideoURI(mVideoURI);
}
}
}
@SuppressWarnings("deprecation")
public String getPath(Uri uri) {
String[] projection = { MediaStore.Images.Media.DATA };
Cursor cursor = managedQuery(uri, projection, null, null, null);
int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
cursor.moveToFirst();
return cursor.getString(column_index);
}
public int uploadFile(String sourceFileUri) {
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 :"
+ selectedImagePath);
runOnUiThread(new Runnable() {
public void run() {
messageText.setText("Source File not exist :"
+ selectedImagePath);
}
});
return 0;
}
else
{
try {
btns=uploadButton.getTag().toString();
System.out.println(btns);
String fileName = sourceFileUri;
File f = new File(selectedImagePath);
imgs= f.getName();
System.out.println(imgs);
upLoadServerUri = "http://mywebsitename.com/webservice/addvideo?version=apps&user_login_id="+User_ID+"&video_1="+imgs+"&action="+btns;
FileInputStream fileInputStream = new FileInputStream(sourceFile);
URL url = new URL(upLoadServerUri);
System.out.println(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("video_1", imgs);
conn.setRequestProperty("user_login_id", User_ID);
conn.setRequestProperty("action", btns);
conn.setRequestProperty("version", "apps");
dos = new DataOutputStream(conn.getOutputStream());
dos.writeBytes(twoHyphens + boundary + lineEnd);
dos.writeBytes("Content-Disposition: form-data; name=\"type\""
+ lineEnd);
dos.writeBytes(lineEnd);
// assign value
dos.writeBytes("version=apps");
dos.writeBytes(lineEnd);
dos.writeBytes(twoHyphens + boundary + lineEnd);
dos.writeBytes("user_login_id="+User_ID);
dos.writeBytes(lineEnd);
dos.writeBytes(twoHyphens + boundary + lineEnd);
dos.writeBytes("action="+btns);
dos.writeBytes(lineEnd);
dos.writeBytes(twoHyphens + boundary + lineEnd);
// send image
dos.writeBytes(twoHyphens + boundary + lineEnd);
dos.writeBytes("Content-Disposition: form-data; name='video_1';filename='"
+ imgs + "'" + 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){
runOnUiThread(new Runnable() {
@SuppressWarnings("deprecation")
public void run() {
try
{
DataInputStream dataIn = new DataInputStream(conn.getInputStream());
String inputLine;
while ((inputLine = dataIn.readLine()) != null)
{
result += inputLine;
System.out.println("Result : " + result);
}
JSONObject jobj = new JSONObject(result);
sta = jobj.getString("status");
msg = jobj.getString("msg");
System.out.println(sta + " >>>>>>> " + msg);
}
catch (Exception e)
{
e.printStackTrace();
}
Toast.makeText(VideoUpload.this, "" + sta + " : " + msg,
Toast.LENGTH_SHORT).show();
}
});
}
//close the streams //
fileInputStream.close();
dos.flush();
dos.close();
} catch (MalformedURLException ex) {
dialog.dismiss();
ex.printStackTrace();
runOnUiThread(new Runnable() {
public void run() {
messageText.setText("MalformedURLException Exception : check script url.");
Toast.makeText(VideoUpload.this, "MalformedURLException", Toast.LENGTH_SHORT).show();
}
});
Log.e("Upload file to server", "error: " + ex.getMessage(), ex);
} catch (Exception e) {
dialog.dismiss();
e.printStackTrace();
runOnUiThread(new Runnable() {
public void run() {
messageText.setText("Got Exception : see logcat ");
Toast.makeText(VideoUpload.this, "Got Exception : see logcat ",
Toast.LENGTH_SHORT).show();
}
});
Log.e("Upload file to server Exception", "Exception : "
+ e.getMessage(), e);
}
dialog.dismiss();
return serverResponseCode;
} // End else block
}
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