java - How to verify email when uploading image to database

Question

newbie question here, so im uploading image in the form of blob which i follows a tutorial. my problem right now is i want to upload my image on specific email which means i put in the email and the image will be uploaded to that specific email in the database. ive done the uploading image part but have no idea how to put the email. tqvm in advanced.

1.MainActivity.java

public class MainActivity extends AppCompatActivity implements View.OnClickListener {

public static final String UPLOAD_URL = "http://10.0.3.2/AndroidImageBlob/upload.php";
public static final String UPLOAD_KEY = "image";
public static final String TAG = "MY MESSAGE";

private int PICK_IMAGE_REQUEST = 1;

private Button buttonChoose;
private Button buttonUpload;

private EditText editTextId;

private ImageView imageView;

private Bitmap bitmap;

private Uri filePath;



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

    editTextId = (EditText) findViewById(R.id.editTextId);

    buttonChoose = (Button) findViewById(R.id.buttonChoose);
    buttonUpload = (Button) findViewById(R.id.buttonUpload);

    imageView = (ImageView) findViewById(R.id.imageView);

    buttonChoose.setOnClickListener(this);
    buttonUpload.setOnClickListener(this);
}

private void showFileChooser() {
    Intent intent = new Intent();
    intent.setType("image/*");
    intent.setAction(Intent.ACTION_GET_CONTENT);
    startActivityForResult(Intent.createChooser(intent, "Select Picture"), PICK_IMAGE_REQUEST);
}

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

    if (requestCode == PICK_IMAGE_REQUEST && resultCode == RESULT_OK && data != null && data.getData() != null) {

        filePath = data.getData();
        try {
            bitmap = MediaStore.Images.Media.getBitmap(getContentResolver(), filePath);
            imageView.setImageBitmap(bitmap);
        } 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;
}

private void uploadImage(){

    class UploadImage extends AsyncTask<Bitmap,Void,String> {

        ProgressDialog loading;
        RequestHandler rh = new RequestHandler();

        @Override
        protected void onPreExecute() {
            super.onPreExecute();
            loading = ProgressDialog.show(MainActivity.this, "Uploading Image", "Please wait...", 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);

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

            return result;
        }


    }

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

@Override
public void onClick(View v) {
    if (v == buttonChoose) {
        showFileChooser();
    }
    if(v == buttonUpload){
        uploadImage();
    }
}
}

2.RequestHandler.java

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 = "Error Registering";
        }
    } 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();
}
}

3.upload.php

<?php

 if($_SERVER['REQUEST_METHOD']=='POST'){

 $username = $_POST['username'];
 $image = $_POST['image'];

 require_once('dbConnect.php');

 $sql = "INSERT INTO android_image (image) VALUES (?) WHERE username  ='".$username."'";

 $stmt = mysqli_prepare($con,$sql);

 mysqli_stmt_bind_param($stmt,"s",$image);
 mysqli_stmt_execute($stmt);

 $check = mysqli_stmt_affected_rows($stmt);

     if($check == 1)
     {
     echo "Image Uploaded Successfully";
     }
     else
     {
     echo "Error Uploading Image";
     }
     mysqli_close($con);
 }
 else
 {
 echo "Error";
 }

Answer 1

Add it in your Hashmap like below:

HashMap<String,String> data = new HashMap<>();
data.put(UPLOAD_KEY, uploadImage);
data.put("id", [your value for the id]);

And on the server side, you can get the value for the id using $_POST["id"] if you are using PHP.