how to upload image from android app to server

1@Override
2public void onActivityResult(int requestCode, int resultCode, Intent data) {
3    super.onActivityResult(requestCode, resultCode, data);
4    if (requestCode == 1)
5        if (resultCode == Activity.RESULT_OK) {
6            Uri selectedImage = data.getData();
7
8            String filePath = getPath(selectedImage);
9            String file_extn = filePath.substring(filePath.lastIndexOf(".") + 1);
10            image_name_tv.setText(filePath);
11
12            try {
13                if (file_extn.equals("img") || file_extn.equals("jpg") || file_extn.equals("jpeg") || file_extn.equals("gif") || file_extn.equals("png")) {
14                    //FINE
15                } else {
16                    //NOT IN REQUIRED FORMAT
17                }
18            } catch (FileNotFoundException e) {
19                // TODO Auto-generated catch block
20                e.printStackTrace();
21            }
22        }
23}
24
25public String getPath(Uri uri) {
26    String[] projection = {MediaColumns.DATA};
27    Cursor cursor = managedQuery(uri, projection, null, null, null);
28    column_index = cursor
29            .getColumnIndexOrThrow(MediaColumns.DATA);
30    cursor.moveToFirst();
31    imagePath = cursor.getString(column_index);
32
33    return cursor.getString(column_index);
34}
35

1implementation 'com.squareup.retrofit2:retrofit:2.3.0'implementation 'com.squareup.retrofit2:converter-gson:2.1.0'