public static final String UPLOAD_URL = "http://servidor.com/pasta/registrar.php";
public static final String UPLOAD_KEY = "imagemPerfil";
public static final String UPLOAD_ID = "idUsuario";

protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_registro);
    Regnome = (EditText) findViewById(R.id.editTextNome);
    Regsobrenome = (EditText) findViewById(R.id.editTextSobrenome);
    Regtelefone = (EditText) findViewById(R.id.editTextTelefone);
    Regcelular = (EditText) findViewById(R.id.editTextCelular);
    Reglogradouro = (EditText) findViewById(R.id.editTextLogradouro);
    Regnumero = (EditText) findViewById(R.id.editTextNumero);
    Regcomplemento = (EditText) findViewById(R.id.editTextComplemento);
    Regreferencia = (EditText) findViewById(R.id.editTextReferencia);
    Regcidade = (EditText) findViewById(R.id.editTextCidade);
    Regcep = (EditText) findViewById(R.id.editTextCEP);
    Regcpfcnpj = (EditText) findViewById(R.id.editTextCPFCNPJ);
    Regemail = (EditText) findViewById(R.id.editTextEmail);
    Regusuario = (EditText) findViewById(R.id.editTextUsuario);
    Regsenha = (EditText) findViewById(R.id.editTextSenha);
    Reguf = (Spinner) findViewById(R.id.spinnerUF);
    RegufText = Reguf.getSelectedItem().toString();
    result = (ImageView) findViewById(R.id.imgPerfil);
}

public void abrirCamera() {
    Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
    if (takePictureIntent.resolveActivity(getPackageManager()) != null) {
        startActivityForResult(takePictureIntent, REQUEST_IMAGE_CAPTURE);
    }
}

public void chamarGaleria() {
    Intent intent = new Intent();
    intent.setType("image/*");
    intent.setAction(Intent.ACTION_GET_CONTENT);
    startActivityForResult(Intent.createChooser(intent, "Selecione a imagem"), SELECT_PHOTO);
}

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    if (requestCode == REQUEST_IMAGE_CAPTURE && resultCode == RESULT_OK) {
        Bundle extras = data.getExtras();
        Bitmap imageBitmap = (Bitmap) extras.get("data");
        result.setImageBitmap(imageBitmap);
    } else if (requestCode == SELECT_PHOTO && resultCode == RESULT_OK && data != null && data.getData() != null){
        filePath = data.getData();
        try {
            bitmapreme = MediaStore.Images.Media.getBitmap(getContentResolver(), filePath);
            if (bitmapreme.getWidth() >= bitmapreme.getHeight()){

                bitmapdest = Bitmap.createBitmap(
                        bitmapreme,
                        bitmapreme.getWidth()/2 - bitmapreme.getHeight()/2,
                        0,
                        bitmapreme.getHeight(),
                        bitmapreme.getHeight()
                );

            }else{

                bitmapdest = Bitmap.createBitmap(
                        bitmapreme,
                        0,
                        bitmapreme.getHeight()/2 - bitmapreme.getWidth()/2,
                        bitmapreme.getWidth(),
                        bitmapreme.getWidth()
                );
            }
            bitmapdest = Bitmap.createScaledBitmap(bitmapdest, 600, 600, false);
            result.setImageBitmap(bitmapdest);
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

public String getStringImage(Bitmap bmp){
    ByteArrayOutputStream baos = new ByteArrayOutputStream();
    bmp.compress(Bitmap.CompressFormat.JPEG, 100, baos);
    byte[] imageBytes = baos.toByteArray();
    String encodedImage = Base64.encodeToString(imageBytes, Base64.DEFAULT);
    return encodedImage;
}

public void salvarReg(View view) {
    if (Regnome.getText().toString().trim().length() == 0 ||
            Regsobrenome.getText().toString().trim().length() == 0 ||
            Regcidade.getText().toString().trim().length() == 0 ||
            Regcpfcnpj.getText().toString().trim().length() == 0 ||
            Regemail.getText().toString().trim().length() == 0 ||
            Regusuario.getText().toString().trim().length() == 0 ||
            Regsenha.getText().toString().trim().length() == 0
            ) {
        mostrarMensagem("Erro", "Nenhum dos campos obrigatórios pode estar em branco. Por favor, preencha corretamente todos os campos.");
    } else {
        String str_nome = Regnome.getText().toString();
        String str_sobrenome = Regsobrenome.getText().toString();
        String str_telefone = Regtelefone.getText().toString();
        String str_celular = Regcelular.getText().toString();
        String str_logradouro = Reglogradouro.getText().toString();
        String str_numero = Regnumero.getText().toString();
        String str_complemento = Regcomplemento.getText().toString();
        String str_referencia = Regreferencia.getText().toString();
        String str_cidade = Regcidade.getText().toString();
        String str_uf = Reguf.getSelectedItem().toString();
        String str_cep = Regcep.getText().toString();
        String str_cpfcnpj = Regcpfcnpj.getText().toString();
        String str_email = Regemail.getText().toString();
        String str_usuario = Regusuario.getText().toString();
        String str_senha = Regsenha.getText().toString();
        String str_dataCad = Regdata.toString();
        String empresas = "000";
        String acesso = "001";
        String type = "registrar";

        BackgroundWorker backgroundWorker = new BackgroundWorker(this);
        backgroundWorker.execute(type, str_nome, str_sobrenome, str_telefone, str_celular, str_logradouro, str_numero, str_complemento, str_referencia, str_cidade, str_uf, str_cep, str_cpfcnpj, str_email, str_usuario, str_senha, str_dataCad, empresas, acesso);

        uploadImage();

        //limpaTexto();
    }
}

public void uploadImage() {
        class UploadImage extends AsyncTask<Bitmap, Void, String> {

            ProgressDialog loading;
            RequestHandler rh = new RequestHandler();

            @Override
            protected void onPreExecute() {
                super.onPreExecute();
                loading = ProgressDialog.show(Registro.this, "Carregando imagem", "Aguarde alguns instantes...", true, true);
            }

            @Override
            protected void onPostExecute(String s) {
                super.onPostExecute(s);
                loading.dismiss();
                Toast.makeText(getApplicationContext(), s, Toast.LENGTH_LONG).show();
            }

            @Override
            protected String doInBackground(Bitmap... params) {
                Bitmap bitmap = params[0];
                String uploadImage = getStringImage(bitmap);

                HashMap<String, String> data = new HashMap<>();
                data.put(UPLOAD_KEY, uploadImage);
                data.put(UPLOAD_ID, uploadImage);

                String result = rh.sendPostRequest(UPLOAD_URL, data);

                return result;
            }
        }

        UploadImage ui = new UploadImage();
        ui.execute(bitmapdest);
    }

public void showMessage(View view) {

    final String items[] = {"Câmera", "Arquivo", "Cancelar"};

    AlertDialog.Builder builder = new AlertDialog.Builder(this);
    builder.setTitle("Selecione a origem da imagem: ");

    builder.setItems(items, new DialogInterface.OnClickListener() {
        public void onClick(DialogInterface d, int choice) {
            // Do something with the selection
            if (choice == 0) {
                abrirCamera();
            } else if (choice == 1) {
                chamarGaleria();
            } else if (choice == 2) {
                return;
            }
        }
    });
    builder.show();
}
}

public class RequestHandler {

public String sendGetRequest(String uri) {
    try {
        URL url = new URL(uri);
        HttpURLConnection con = (HttpURLConnection) url.openConnection();
        BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(con.getInputStream()));

        String result;

        StringBuilder sb = new StringBuilder();

        while((result = bufferedReader.readLine())!=null){
            sb.append(result);
        }

        return sb.toString();
    } catch (Exception e) {
        return null;
    }
}

public String sendPostRequest(String requestURL,
                              HashMap<String, String> postDataParams) {

    URL url;
    String response = "";
    try {
        url = new URL(requestURL);

        HttpURLConnection conn = (HttpURLConnection) url.openConnection();
        conn.setReadTimeout(15000);
        conn.setConnectTimeout(15000);
        conn.setRequestMethod("POST");
        conn.setDoInput(true);
        conn.setDoOutput(true);


        OutputStream os = conn.getOutputStream();
        BufferedWriter writer = new BufferedWriter(
                new OutputStreamWriter(os, "UTF-8"));
        writer.write(getPostDataString(postDataParams));

        writer.flush();
        writer.close();
        os.close();
        int responseCode = conn.getResponseCode();

        if (responseCode == HttpsURLConnection.HTTP_OK) {
            BufferedReader br = new BufferedReader(new InputStreamReader(conn.getInputStream()));
            response = br.readLine();
        } else {
            response = "Erro ao registrar";
        }
    } catch (Exception e) {
        e.printStackTrace();
    }

    return response;
}

private String getPostDataString(HashMap<String, String> params) throws UnsupportedEncodingException {
    StringBuilder result = new StringBuilder();
    boolean first = true;
    for (Map.Entry<String, String> entry : params.entrySet()) {
        if (first)
            first = false;
        else
            result.append("&");

        result.append(URLEncoder.encode(entry.getKey(), "UTF-8"));
        result.append("=");
        result.append(URLEncoder.encode(entry.getValue(), "UTF-8"));
    }

    return result.toString();
}

Context context;
AlertDialog alertDialog;

BackgroundWorker(Context ctx) {
    context = ctx;
}

@Override
protected String doInBackground(String... params) {
    String type = params[0];

    String login_url = "http://servidor.com/pasta/login.php";
    String registrar_url = "http://servidor.com/pasta/registrar.php";
    String consultar_url = "http://servidor.com/pasta/consultar.php";
    //String excluir_url = "http://servidor.com/pasta/excluir.php";

    if (type.equals("login")) {
        try {

            String usuario = params[1];
            String senha = params[2];

            URL url = new URL(login_url);
            HttpURLConnection httpURLConnection = (HttpURLConnection) url.openConnection();
            httpURLConnection.setRequestMethod("POST");
            httpURLConnection.setDoOutput(true);
            httpURLConnection.setDoInput(true);
            OutputStream outputStream = httpURLConnection.getOutputStream();
            BufferedWriter bufferedWriter = new BufferedWriter(new OutputStreamWriter(outputStream, "UTF-8"));
            String dados = URLEncoder.encode("usuario", "UTF-8") + "=" + URLEncoder.encode(usuario, "UTF-8") + "&"
                    + URLEncoder.encode("senha", "UTF-8") + "=" + URLEncoder.encode(senha, "UTF-8");
            bufferedWriter.write(dados);
            bufferedWriter.flush();
            bufferedWriter.close();
            outputStream.close();

            InputStream inputStream = httpURLConnection.getInputStream();
            BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(inputStream, "iso-8859-1"));

            String result = "";
            String linha = "";

            while ((linha = bufferedReader.readLine()) != null) {
                result += linha;
            }

            bufferedReader.close();
            inputStream.close();
            httpURLConnection.disconnect();

            return result;
        } catch (MalformedURLException e) {

            e.printStackTrace();

        } catch (IOException e) {
            e.printStackTrace();
        }
    } else if (type.equals("registrar")) {
        try {
            String nome = params[1];
            String sobrenome = params[2];
            String telefone = params[3];
            String celular = params[4];
            String logradouro = params[5];
            String numero = params[6];
            String complemento = params[7];
            String referencia = params[8];
            String cidade = params[9];
            String uf = params[10];
            String cep = params[11];
            String cpfcpnj = params[12];
            String email = params[13];
            String usuario = params[14];
            String senha = params[15];
            String dataCad = params[16];
            String empresas = params[17];
            String acesso = params[18];

            URL url = new URL(registrar_url);
            HttpURLConnection httpURLConnection = (HttpURLConnection) url.openConnection();
            httpURLConnection.setRequestMethod("POST");
            httpURLConnection.setDoOutput(true);
            httpURLConnection.setDoInput(true);
            OutputStream outputStream = httpURLConnection.getOutputStream();
            BufferedWriter bufferedWriter = new BufferedWriter(new OutputStreamWriter(outputStream, "UTF-8"));
            String dados = URLEncoder.encode("nome", "UTF-8") + "=" + URLEncoder.encode(nome, "UTF-8") + "&"
                    + URLEncoder.encode("sobrenome", "UTF-8") + "=" + URLEncoder.encode(sobrenome, "UTF-8") + "&"
                    + URLEncoder.encode("telefone", "UTF-8") + "=" + URLEncoder.encode(telefone, "UTF-8") + "&"
                    + URLEncoder.encode("celular", "UTF-8") + "=" + URLEncoder.encode(celular, "UTF-8") + "&"
                    + URLEncoder.encode("logradouro", "UTF-8") + "=" + URLEncoder.encode(logradouro, "UTF-8") + "&"
                    + URLEncoder.encode("numero", "UTF-8") + "=" + URLEncoder.encode(numero, "UTF-8") + "&"
                    + URLEncoder.encode("complemento", "UTF-8") + "=" + URLEncoder.encode(complemento, "UTF-8") + "&"
                    + URLEncoder.encode("referencia", "UTF-8") + "=" + URLEncoder.encode(referencia, "UTF-8") + "&"
                    + URLEncoder.encode("cidade", "UTF-8") + "=" + URLEncoder.encode(cidade, "UTF-8") + "&"
                    + URLEncoder.encode("uf", "UTF-8") + "=" + URLEncoder.encode(uf, "UTF-8") + "&"
                    + URLEncoder.encode("cep", "UTF-8") + "=" + URLEncoder.encode(cep, "UTF-8") + "&"
                    + URLEncoder.encode("cpfcnpj", "UTF-8") + "=" + URLEncoder.encode(cpfcpnj, "UTF-8") + "&"
                    + URLEncoder.encode("email", "UTF-8") + "=" + URLEncoder.encode(email, "UTF-8") + "&"
                    + URLEncoder.encode("usuario", "UTF-8") + "=" + URLEncoder.encode(usuario, "UTF-8") + "&"
                    + URLEncoder.encode("senha", "UTF-8") + "=" + URLEncoder.encode(senha, "UTF-8") + "&"
                    + URLEncoder.encode("dataCad", "UTF-8") + "=" + URLEncoder.encode(dataCad, "UTF-8") + "&"
                    + URLEncoder.encode("empresas", "UTF-8") + "=" + URLEncoder.encode(empresas, "UTF-8") + "&"
                    + URLEncoder.encode("acesso", "UTF-8") + "=" + URLEncoder.encode(acesso, "UTF-8");
            bufferedWriter.write(dados);
            bufferedWriter.flush();
            bufferedWriter.close();
            outputStream.close();
            InputStream inputStream = httpURLConnection.getInputStream();
            BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(inputStream, "iso-8859-1"));
            String result = "";
            String line = "";
            while ((line = bufferedReader.readLine()) != null) {
                result += line;
            }
            bufferedReader.close();
            inputStream.close();
            httpURLConnection.disconnect();
            return result;
        } catch (MalformedURLException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
    } else if (type.equals("consultar")) {
        try {
            String nome = params[1];

            URL url = new URL(consultar_url);
            HttpURLConnection httpURLConnection = (HttpURLConnection) url.openConnection();
            httpURLConnection.setRequestMethod("POST");
            httpURLConnection.setDoOutput(true);
            httpURLConnection.setDoInput(true);
            OutputStream outputStream = httpURLConnection.getOutputStream();
            BufferedWriter bufferedWriter = new BufferedWriter(new OutputStreamWriter(outputStream, "UTF-8"));
            String dados = URLEncoder.encode("nome", "UTF-8") + "=" + URLEncoder.encode(nome, "UTF-8");
            bufferedWriter.write(dados);
            bufferedWriter.flush();
            bufferedWriter.close();
            outputStream.close();
            InputStream inputStream = httpURLConnection.getInputStream();
            BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(inputStream, "iso-8859-1"));
            String result = "";
            String line = "";
            while ((line = bufferedReader.readLine()) != null) {
                result += line;
            }
            bufferedReader.close();
            inputStream.close();
            httpURLConnection.disconnect();
            return result;
        } catch (MalformedURLException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
    } else if(type.equals("uploadPerfil")) {
        try {
            String imagemPerfil = params[1];

            URL url = new URL(consultar_url);
            HttpURLConnection httpURLConnection = (HttpURLConnection) url.openConnection();
            httpURLConnection.setRequestMethod("POST");
            httpURLConnection.setDoOutput(true);
            httpURLConnection.setDoInput(true);
            OutputStream outputStream = httpURLConnection.getOutputStream();
            BufferedWriter bufferedWriter = new BufferedWriter(new OutputStreamWriter(outputStream, "UTF-8"));
            String dados = URLEncoder.encode("imagemPerfil", "UTF-8") + "=" + URLEncoder.encode(imagemPerfil, "UTF-8");
            bufferedWriter.write(dados);
            bufferedWriter.flush();
            bufferedWriter.close();
            outputStream.close();
            InputStream inputStream = httpURLConnection.getInputStream();
            BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(inputStream, "iso-8859-1"));
            String result = "";
            String line = "";
            while ((line = bufferedReader.readLine()) != null) {
                result += line;
            }
            bufferedReader.close();
            inputStream.close();
            httpURLConnection.disconnect();
            return result;
        } catch (MalformedURLException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
    } else {
        return null;
    }

    return null;
}


@Override
protected void onPreExecute() {
    alertDialog = new AlertDialog.Builder(context).create();
    alertDialog.setTitle("Login Status");

}

@Override
protected void onPostExecute(String result) {
    //if(result.toString().equals("usuario")) {
    //    context.startActivity(new Intent(context, Inicio.class));
    //}

    String s = result.trim();
    //alertDialog.setMessage(s);

    switch (s) {
        case "user":
            context.startActivity(new Intent(context, Inicio.class));
            break;
        case "adm":
            context.startActivity(new Intent(context, InicioAdm.class));
            break;
        default:
            alertDialog.setMessage(s);
            alertDialog.show();
    }
}

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

 }

<?php
 require "conexao.php";

 $nome = $_POST["nome"];
 $sobrenome = $_POST["sobrenome"];
 $telefone = $_POST["telefone"];
 $celular = $_POST["celular"];
 $logradouro = $_POST["logradouro"];
 $numero = $_POST["numero"];
 $complemento = $_POST["complemento"];
 $referencia = $_POST["referencia"];
 $cidade = $_POST["cidade"];
 $uf = $_POST["uf"];
 $cep = $_POST["cep"];
 $cpfcnpj = $_POST["cpfcnpj"];
 $email = $_POST["email"];
 $usuario = $_POST["usuario"];
 $senha = $_POST["senha"];
 $dataCad = $_POST["dataCad"];
 $empresas= $_POST["empresas"];
 $acesso = $_POST["acesso"];

 //$idUsuario = $_POST["idUsuario"];
 $imagemPerfil = $_POST["imagemPerfil"];

 $mysql_qry = "INSERT INTO `u562378822_banco`.`usuarios` VALUES (null, '$nome', '$sobrenome', '$telefone', '$celular', '$logradouro', '$numero', '$complemento', '$referencia', '$cidade', '$uf', '$cep', '$cpfcnpj', '$email', '$usuario', '$senha', '$dataCad', '$dataAcesso', '$empresas', '$acesso', null);";
 $verifica_qry = "SELECT usuario FROM usuarios WHERE usuario LIKE '$usuario';";
 $tudo_qry = "SELECT * FROM `u562378822_banco`.`usuarios` WHERE `usuarios`.`usuario` ='$usuario';";
 $tudo_exec = mysqli_query($conexao,$tudo_qry);
 $idUsuario = mysqli_fetch_array($tudo_exec);
 $sqldeimagem = "UPDATE usuarios SET `imagemPerfil` = '$imagemPerfil' WHERE `usuarios`.`idUsuario` ='$idUsuario[0]';";
 $verificador = mysqli_query($conexao,$verifica_qry);

 if(mysqli_num_rows($verificador) > 0){
   echo "Erro. Este nome de usuario já está sendo usado por alguém. Por favor, escolha outro.";
 } elseif($conexao->query($mysql_qry) === TRUE) {
if($conexao->query($sqldeimagem) === TRUE){
    $linhasAfetadas = mysqli_affected_rows($conexao);
    if ($linhasAfetadas == 0) {
         echo "Nenhuma coisa mudou";
    } elseif ($linhasAfetadas == 1) {
         echo "Imagem registrada com sucesso";
    } elseif ($linhasAfetadas > 0) {
         echo "sucesso mudaram as linhas $linhasAfetadas";
    } else {
         echo "erro";
     }

}
//$atualizador = mysqli_query($conexao,$sqldeimagem);
//$linhasAfetadas = mysqli_affected_rows($conexao);
 } else {
       echo "Erro. Os dados não foram salvos.";
 }

 $conexao->close();

 ?>

$imagem = 'myimage.png';
$extensao = pathinfo($imagem, PATHINFO_EXTENSION);
$dataraw = file_get_contents($imagem);

echo 'data:image/' . $extensao . ';base64,' . base64_encode($dataraw);