How to upload an image from android to php using asynctask

Question

everyone. I am stuck on this project I am working on. I want to be able to upload an image from the android gallery, encode that image to a base64 string and send to PHP web service, as a get variable, then decode the image from the other end and do with it as I wish.

So far I am able to select the image, from the gallery and even encode to base64 string and storing in android preference.

The problem is, I think that not all the string is being sent to the PHP service (Some is truncated).

Why do I think so? My Log.d showed me different strings when dumped at different locations.

The code that gets the image and encodes is:-

private void galleryIntent()
{
    Intent intent = new Intent();
    intent.setType("image/*");
    intent.setAction(Intent.ACTION_GET_CONTENT);
    startActivityForResult(Intent.createChooser(intent, "Please select a file"),1);
}

private String onSelectFromGalleryResult (Intent data) {

    if (data != null) {
        try {
            bitmap = MediaStore.Images.Media.getBitmap(getContext().getContentResolver() , data.getData()) ;
        } catch (IOException e) {
            e.printStackTrace();
        }

        ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream() ;

        bitmap.compress(Bitmap.CompressFormat.JPEG, 100, byteArrayOutputStream) ;

        byte[] imageBytes = byteArrayOutputStream.toByteArray() ;

        Log.d ("Selected Image Gallery" , Base64.encodeToString(imageBytes, Base64.DEFAULT)) ;

        return Base64.encodeToString (imageBytes, Base64.DEFAULT) ;
    } else {
        return null ;
    }
}

@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);

    SharedPreferences sharedPreferences =  getContext().getSharedPreferences("MyOnActivityResultPref" , Context.MODE_PRIVATE);
    SharedPreferences.Editor editor = sharedPreferences.edit() ;

    if (resultCode == Activity.RESULT_OK) {

        if (requestCode == 1) {
            /*Here we handle the image gotten from the gallery*/
            String encodedGalleryImage = onSelectFromGalleryResult(data);

           editor.putString("userEncodedGalleryImage" , encodedGalleryImage);

        } else if (requestCode == 0) {
            /*Here we handle the image that was take using the camera*/

        }

        editor.apply();
    }
}

Here we call the asynctask class

private void callAsynctask () {
  SharedPreferences sp = getContext().getSharedPreferences("MyOnActivityResultPref" , Context.MODE_PRIVATE);

    String userQuestionAttachement = sp.getString("userEncodedGalleryImage" , "") ;

Log.d("callingEncodedImage" , userQuestionAttachement) ;
}

The problem I have is that the log from Log.d ("Selected Image Gallery" , Base64.encodeToString(imageBytes, Base64.DEFAULT)) ; is different from Log.d("callingEncodedImage" , userQuestionAttachement) ;

There both have same beginning, but different endings. I expect to see the same characters.

Can someone please help me sort it out?

Answer 1

In Android,

 new UploadFileAsync().execute("");



  private class UploadFileAsync extends AsyncTask<String, Void, String> {

    @Override
    protected String doInBackground(String... params) {

        try {
  String sourceFileUri = "/mnt/sdcard/abc.png";

            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()) {

                try {
                    String upLoadServerUri = "http://website.com/abc.php?";

                    // 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("bill", sourceFileUri);

                    dos = new DataOutputStream(conn.getOutputStream());

                    dos.writeBytes(twoHyphens + boundary + lineEnd);
                    dos.writeBytes("Content-Disposition: form-data; name=\"bill\";filename=\""
                            + sourceFileUri + "\"" + 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();

                    if (serverResponseCode == 200) {

                        // messageText.setText(msg);
                        //Toast.makeText(ctx, "File Upload Complete.",
                        //      Toast.LENGTH_SHORT).show();

                        // recursiveDelete(mDirectory1);

                    }

                    // close the streams //
                    fileInputStream.close();
                    dos.flush();
                    dos.close();

                } catch (Exception e) {

                    // dialog.dismiss();
                    e.printStackTrace();

                }
                // dialog.dismiss();

            } // End else block


        } catch (Exception ex) {
            // dialog.dismiss();

            ex.printStackTrace();
        }
        return "Executed";
    }

    @Override
    protected void onPostExecute(String result) {

    }

    @Override
    protected void onPreExecute() {
    }

    @Override
    protected void onProgressUpdate(Void... values) {
    }
}

In Php,

    <?php


     if (is_uploaded_file($_FILES['bill']['tmp_name'])) {
    $uploads_dir = './';
                            $tmp_name = $_FILES['bill']['tmp_name'];
                            $pic_name = $_FILES['bill']['name'];
                            move_uploaded_file($tmp_name, $uploads_dir.$pic_name);
                            }
               else{
                   echo "File not uploaded successfully.";
           }

   ?>