Question

Hi i am storing longitude and latitude values in textfile and saving them in my sdcard.now i want to save this data to webserver(java) textfile.please tell me how to create a textfile in server and also how to post data to that file.here is my code.

public class MainActivity extends Activity implements LocationListener{

private final static String STORETEXT="storetext.txt";


LocationManager locationManager ;
String provider;
String value1;
String value2;


@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    // Getting LocationManager object
    locationManager = (LocationManager)getSystemService(Context.LOCATION_SERVICE);        

    // Creating an empty criteria object
    Criteria criteria = new Criteria();

    // Getting the name of the provider that meets the criteria
    provider = locationManager.getBestProvider(criteria, false);


    if(provider!=null && !provider.equals("")){

        // Get the location from the given provider 
        Location location = locationManager.getLastKnownLocation(provider);


        locationManager.requestLocationUpdates(provider, 20000, 1, this);


        if(location!=null)
            onLocationChanged(location);
        else
            Toast.makeText(getBaseContext(), "Location can't be retrieved", Toast.LENGTH_SHORT).show();

    }else{
        Toast.makeText(getBaseContext(), "No Provider Found", Toast.LENGTH_SHORT).show();
    }
}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    getMenuInflater().inflate(R.menu.activity_main, menu);
    return true;
}

@Override
public void onLocationChanged(Location location) {
    // Getting reference to TextView tv_longitude
    TextView tvLongitude = (TextView)findViewById(R.id.tv_longitude);

    // Getting reference to TextView tv_latitude
    TextView tvLatitude = (TextView)findViewById(R.id.tv_latitude);

    // Setting Current Longitude
    tvLongitude.setText("Longitude:" + location.getLongitude());

    // Setting Current Latitude
    tvLatitude.setText("Latitude:" + location.getLatitude() );

    value1 = tvLongitude.getText().toString();
    value2 = tvLatitude.getText().toString();

    // saveClicked();

    SaveClicked2();




}

public void SaveClicked2() {

    try{

    File file = new File("/sdcard/Sree.txt");
    file.createNewFile();
    FileOutputStream fOut = new FileOutputStream(file);
     OutputStreamWriter out = new OutputStreamWriter(fOut);
     out.append(value1);
     out.append(value2);
     out.close();

     Toast.makeText(getBaseContext(),
                "Done writing values to textfile",
                Toast.LENGTH_SHORT).show();

    }
    catch(Exception e){

        Toast.makeText(getBaseContext(), e.getMessage(),
                Toast.LENGTH_SHORT).show();



    }







}

private void saveClicked() {



    try{
        OutputStreamWriter out=
                new OutputStreamWriter(openFileOutput(STORETEXT, 0));
        out.write(value1);
        out.write(value2);
        out.close();

        Toast
    .makeText(this, value1, Toast.LENGTH_LONG)
    .show();

    }
    catch(Throwable t){
        Toast.makeText(this, "Exception: "+ t.toString(), Toast.LENGTH_LONG)
        .show();

    }
}

@Override
public void onProviderDisabled(String provider) {
    // TODO Auto-generated method stub      
}

@Override
public void onProviderEnabled(String provider) {
    // TODO Auto-generated method stub      
}

@Override
public void onStatusChanged(String provider, int status, Bundle extras) {
    // TODO Auto-generated method stub      
}}

Answer 1

If you have the textfile on the SD card, then you can use the following uploading approach to upload the file to your server.

You will need a script, such as this PHP script called uploader.php

    <?php

    $target_path = "H:/www/yourwebsitedirectory.com/"; 
    $target_path = $target_path . basename( $_FILES['uploadedfile']['name']); 

    if(move_uploaded_file($_FILES['uploadedfile']['tmp_name'], $target_path)) {
    echo "The file ".  basename( $_FILES['uploadedfile']['name']). 
    " has been uploaded";
    } else{
    echo "There was an error uploading the file, please try again!";
    }

    ?>

Then in your java you can have an Uploader function like this:
Make sure to fill in your proper exception handling, and you will need to grab the HTTPClient libraries.

      public static void Uploader(File fname, String fpath) {
          try {
          DefaultHttpClient httpclient = new DefaultHttpClient();
          httpclient.getParams().setParameter(CoreProtocolPNames.PROTOCOL_VERSION, HttpVersion.HTTP_1_1);

          String postURL = "http://www.yourwebsite.com/uploader.php";
          HttpPost httppost = new HttpPost(postURL);

          // the boundary key below is arbitrary, it just needs to match the MPE so it can decode multipart correctly
          httppost.setHeader("Content-Type", "multipart/form-data; boundary=--32530126183148");
          MultipartEntity mpEntity = new MultipartEntity(HttpMultipartMode.BROWSER_COMPATIBLE, "--32530126183148", Charset.forName("UTF-8"));
    try {
        mpEntity.addPart("uploadedfile",    new FileBody((fname), "application/txt"));
        mpEntity.addPart("MAX_FILE_SIZE",   new StringBody("100000"));

    } catch (Exception e1) {
    } 
          httppost.setEntity(mpEntity);
          HttpResponse response;
          try {
              response = httpclient.execute(httppost);
              HttpEntity resEntity = response.getEntity();
              if (resEntity != null) {
                  resEntity.consumeContent();
              }
          } catch (ClientProtocolException e) {
          } catch (Exception e) {
          }
          httpclient.getConnectionManager().shutdown();
          } catch (Throwable e) {
              try {
              } catch (Throwable e1) {
              }
          }
      }

Call the function like this:

    File tmpDir = new File(android.os.Environment.getExternalStorageDirectory(),"Directory of your file");
    File fname = new File(tmpDir, filesnameonSD);
    Uploader(fname);

And to test your PHP script, you can use a webpage with the following simple HTML form

  <form enctype="multipart/form-data" action="uploader.php" method="POST">
  <input type="hidden" name="MAX_FILE_SIZE" value="100000" />
  Choose a file to upload: <input name="uploadedfile" type="file" /><br />
  <input type="submit" value="Upload File" />
  </form>