Android AsyncTask Upload Files - php

Question

I want upload a number of files that are stored on the android device but it seems to be stuck in the doInBackground Method of AsyncTask. I get no errors. The Dialog popsup and stays active i eliminated the dialog and no effect. The other part of my project is to decode the json files I uploaded and store them in a database but thats for later.
/********************UPLOAD GPSDATA*************************************/
class UploadGpsData extends AsyncTask<Void, Void, Void>{
NetworkInfo net;
MainActivity uActivity;
HttpURLConnection connection = null;
DataOutputStream outputStream = null;
DataInputStream inputStream = null;
String folderPath;
String arrayOfFiles[];
File root;
File allFiles;
String urlServer = "http://urluploadscriptaddress.php";
String lineEnd = "\r\n";
String twoHyphens = "--";
String boundary = "*****";
int bytesRead, bytesAvailable, bufferSize;
byte[] buffer;
int maxBufferSize = 1*1024*1024;
URL url;
ProgressDialog pDialog = new ProgressDialog(MainActivity.this);
#Override
protected void onPreExecute() {
Log.d(" UploadGpsData","onPreRequest");
pDialog.setMessage("Uploading GPS Data. Please wait...");
pDialog.setIndeterminate(false);
pDialog.setCancelable(true);
pDialog.show();
}
#Override
protected Void doInBackground(Void... params) {
Log.d(" UploadGpsData","doInBackground");
root = Environment.getExternalStorageDirectory();
//pathToOurFile = root.getAbsolutePath()+"/Beagle Data/07-09-2013_16-21-30.json";
folderPath = root.getAbsolutePath()+"/Beagle Data/";
allFiles = new File(folderPath);
arrayOfFiles = allFiles.list();
for(int i = 0; i < arrayOfFiles.length; i++){
Log.d("File Names", arrayOfFiles[i].toString());
//File filename = new File(arrayOfFiles[i].toString());
try {
url = new URL(urlServer);
} catch (MalformedURLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
try {
connection = (HttpURLConnection) url.openConnection();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
// Allow Inputs & Outputs
connection.setDoInput(true);
connection.setDoOutput(true);
connection.setUseCaches(false);
// Enable POST method
try {
connection.setRequestMethod("POST");
} catch (ProtocolException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
connection.setRequestProperty("Connection", "Keep-Alive");
connection.setRequestProperty("Content-Type", "multipart/form-data;boundary="+boundary);
try{
FileInputStream fileInputStream = new FileInputStream(new File(folderPath+arrayOfFiles[i].toString()) );
try {
outputStream = new DataOutputStream( connection.getOutputStream() );
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
outputStream.writeBytes(twoHyphens + boundary + lineEnd);
outputStream.writeBytes("Content-Disposition: form-data; name=\"uploadedfile\";filename=\"" + folderPath+arrayOfFiles[i].toString() +"\"" + lineEnd);
outputStream.writeBytes(lineEnd);
bytesAvailable = fileInputStream.available();
bufferSize = Math.min(bytesAvailable, maxBufferSize);
buffer = new byte[bufferSize];
// Read file
bytesRead = fileInputStream.read(buffer, 0, bufferSize);
while (bytesRead > 0){
outputStream.write(buffer, 0, bufferSize);
bytesAvailable = fileInputStream.available();
bufferSize = Math.min(bytesAvailable, maxBufferSize);
bytesRead = fileInputStream.read(buffer, 0, bufferSize);
}
outputStream.writeBytes(lineEnd);
outputStream.writeBytes(twoHyphens + boundary + twoHyphens + lineEnd);
//int serverResponseCode = connection.getResponseCode();
//String serverResponseMessage = connection.getResponseMessage();
// Responses from the server (code and message)
//serverResponseCode = connection.getResponseCode();
//serverResponseMessage = connection.getResponseMessage();
fileInputStream.close();
outputStream.flush();
outputStream.close();
} catch(Exception e){
e.printStackTrace();
}
}
return null;
}
protected void onPostExecute() {
Log.d(" UploadGpsData","onPost");
pDialog.dismiss();
txtUploadStatus = (TextView) findViewById(id.txtUploadStatus);
txtUploadStatus.setText("Upload Achieved");
}
}
/********************END OF UPLOADGPSDATA*************************************/
PHP Script below: The error log is empty so I am assuming its stuck on the android application
<?php
$target_path = "./";
$target_path = $target_path . basename( $_FILES['uploadedfile']['name']);
$file = basename( $_FILES['uploadedfile']['name']);
move_uploaded_file($_FILES['uploadedfile']['tmp_name'], $target_path)
?>

Answer 1

You do not implement the #Override onPostExecute.
Modify your onPostExecute assignature with this:
#Override
protected void onPostExecute(Void result) {
This will resolve your problem.
What was happening:
You are not overriding the OnPostExecute AsyncTask method, was creating a new one.

Answer 2

You are missing the params for onPostExecute() may be one problem
#Override
protected void onPostExecute(Void result) {
Even though you aren't returning anything to it from doInBackground() you still need this to be the AsyncTask method. If this doesn't fix it then please also post how you are calling it and explain if you have set breakpoints anywhere to see what it is doing.

Answer 3

You "manipulate" UI in a no-UI thread.
Try to comment all your code related to UI, it should work.
You can use
Context.runOnUiThread(new Runnable() ....
In order to do UI stuff.