Uploading a File (Multipart/Form data) to Server Failed in Android using ion library

Question

I am new in android ,and am trying to upload a file to server using ion library ion library but the file crashes. with this error.

FATAL EXCEPTION: Thread-5572         


        

Answer 1

Well i have found out a simple way of uploading or posting multipart/form-data with an upload progress bar. may be this could help.

Suppose you server is waiting for the following data :

1.File(PDF,Image,Audio,Video etc.).

2.Name

3.Email

4.Address.

and you want to upload that information once in a URL be it an Absolute URL or a Relative URL, ion library is easy , precise, efficient and much better in this.

STEP 1:

declare your URI

private Uri filePath;

STEP 2:

then Pick the file from your gallery , here it's your choice you identify any kind of files you want a user to view, me here i have identified a PDF file. on this line intent.setType("application/pdf");

private void showFileChooser() {
        Intent intent = new Intent();
        intent.setType("application/pdf");
        intent.setAction(Intent.ACTION_GET_CONTENT);
        startActivityForResult(Intent.createChooser(intent, "Select Pdf"), PICK_PDF_REQUEST);
    }

    //handling the image chooser activity result
    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);

        if (requestCode == PICK_PDF_REQUEST && resultCode == RESULT_OK && data != null && data.getData() != null) {
            filePath = data.getData();

            Toast.makeText(getApplicationContext(), "" + filePath, Toast.LENGTH_LONG).show();
        }
    }

then you can call showFileChooser() in the Button for a click to access your gallery.

STEP 3:

a) Make a method Upload() containing ion library to start the job. If you see in this method , i first declared the file,name, email,address , for file it gets the URI data of a selected file or the path file , then name, email,address, it gets the data from EditText , you have to declare EditText to get the data.

b) Then identify the URL you want to use in Posting mine is url_. but make sure you include POST, in the load section .load("POST",url_). c) Then you set the file by using .setMultipartFile("File", file) and the rest of the parameters by setting MultipartParameter .setMultipartParameter("Name", name) and so on.

public void Upload() {

        String file= FilePath.getPath(this, filePath);
        final String name = name_edt.getText().toString();
        final String email = email_edt.getText().toString();
        final String address = address_edt.getText().toString();
        

        final ProgressDialog pd;
        pd = new ProgressDialog(MainActivity.this);
        pd.setMessage("Logging in...");
        pd.setCancelable(false);
        pd.show();
        final String url_ = "xxxxxxxxxxxxxxx";

        final File file = new File(Uri.parse(path).toString());



        Ion.with(MainActivity.this)
                .load("POST",url_)
                .progressDialog(pd)
                .setMultipartFile("file", file)
                .setMultipartParameter("Name", name)
                .setMultipartParameter("Email", email)
                .setMultipartParameter("Address.", address)
               
                .asString()
                .setCallback(new FutureCallback<String>() {
                    @Override
                    public void onCompleted(Exception e, String result) {


                        //     Toast.makeText(getApplicationContext(),""+file,Toast.LENGTH_LONG).show();

                        System.out.println("Error " + e);
                       // Toast.makeText(getApplicationContext(), "Exception : " + e, Toast.LENGTH_LONG).show();
                        Toast.makeText(getApplicationContext(), result, Toast.LENGTH_LONG).show();
                        // Toast.makeText(getApplicationContext(),""+e,Toast.LENGTH_LONG).show();


                        pd.dismiss();


                    }
                });
    }

Then you are good to go , according to your C# API , the file will be able to save in the Folder. Even others use Php or any other language you can create your own Api to save a file in your server folder

Hope it works well.

Answer 2

Remove Thread from calling chain as Ion manages that for you and your exception is not related to Ion FYI.

button.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            if(selectedFilePath != null){
                dialog = ProgressDialog.show(MainActivity.this,"","Uploading File...",true);
                        uploadFile(selectedFilePath);
                      //  OnSendFileInfo();
            }else{
                Toast.makeText(MainActivity.this,"Please choose a File First",Toast.LENGTH_SHORT).show();
            }
        }
    });

You can not use a View in Non Ui thread . So as i am seeing that you are creating a progress dialog inside your upload method which is being called for a thread .That code should be in Main thread only.