Example
Once you have setup the Retrofit environment in your project, you can use the following example that demonstrates how to upload multiple files using Retrofit:
private void mulipleFileUploadFile(Uri[] fileUri) {
OkHttpClient okHttpClient = new OkHttpClient();
OkHttpClient clientWith30sTimeout = okHttpClient.newBuilder()
.readTimeout(30, TimeUnit.SECONDS)
.build();
Retrofit retrofit = new Retrofit.Builder()
.baseUrl(API_URL_BASE)
.addConverterFactory(new MultiPartConverter())
.client(clientWith30sTimeout)
.build();
WebAPIService service = retrofit.create(WebAPIService.class); //here is the interface which you have created for the call service
Map<String, okhttp3.RequestBody> maps = new HashMap<>();
if (fileUri!=null && fileUri.length>0) {
for (int i = 0; i < fileUri.length; i++) {
String filePath = getRealPathFromUri(fileUri[i]);
File file1 = new File(filePath);
if (filePath != null && filePath.length() > 0) {
if (file1.exists()) {
okhttp3.RequestBody requestFile = okhttp3.RequestBody.create(okhttp3.MediaType.parse("multipart/form-data"), file1);
String filename = "imagePath" + i; //key for upload file like : imagePath0
maps.put(filename + "\"; filename=\"" + file1.getName(), requestFile);
}
}
}
}
String descriptionString = " string request";//
//hear is the your json request
Call<String> call = service.postFile(maps, descriptionString);
call.enqueue(new Callback<String>() {
@Override
public void onResponse(Call<String> call,
Response<String> response) {
Log.i(LOG_TAG, "success");
Log.d("body==>", response.body().toString() + "");
Log.d("isSuccessful==>", response.isSuccessful() + "");
Log.d("message==>", response.message() + "");
Log.d("raw==>", response.raw().toString() + "");
Log.d("raw().networkResponse()", response.raw().networkResponse().toString() + "");
}
@Override
public void onFailure(Call<String> call, Throwable t) {
Log.e(LOG_TAG, t.getMessage());
}
});
}
public String getRealPathFromUri(final Uri uri) { // function for file path from uri,
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT && DocumentsContract.isDocumentUri(mContext, uri)) {
// ExternalStorageProvider
if (isExternalStorageDocument(uri)) {
final String docId = DocumentsContract.getDocumentId(uri);
final String[] split = docId.split(":");
final String type = split[0];
if ("primary".equalsIgnoreCase(type)) {
return Environment.getExternalStorageDirectory() + "/" + split[1];
}
}
// DownloadsProvider
else if (isDownloadsDocument(uri)) {
final String id = DocumentsContract.getDocumentId(uri);
final Uri contentUri = ContentUris.withAppendedId(
Uri.parse("content://downloads/public_downloads"), Long.valueOf(id));
return getDataColumn(mContext, contentUri, null, null);
}
// MediaProvider
else if (isMediaDocument(uri)) {
final String docId = DocumentsContract.getDocumentId(uri);
final String[] split = docId.split(":");
final String type = split[0];
Uri contentUri = null;
if ("image".equals(type)) {
contentUri = MediaStore.Images.Media.EXTERNAL_CONTENT_URI;
} else if ("video".equals(type)) {
contentUri = MediaStore.Video.Media.EXTERNAL_CONTENT_URI;
} else if ("audio".equals(type)) {
contentUri = MediaStore.Audio.Media.EXTERNAL_CONTENT_URI;
}
final String selection = "_id=?";
final String[] selectionArgs = new String[]{
split[1]
};
return getDataColumn(mContext, contentUri, selection, selectionArgs);
}
}
// MediaStore (and general)
else if ("content".equalsIgnoreCase(uri.getScheme())) {
// Return the remote address
if (isGooglePhotosUri(uri))
return uri.getLastPathSegment();
return getDataColumn(mContext, uri, null, null);
}
// File
else if ("file".equalsIgnoreCase(uri.getScheme())) {
return uri.getPath();
}
return null;
}
Following is the interface
public interface WebAPIService {
@Multipart
@POST("main.php")
Call<String> postFile(@PartMap Map<String,RequestBody> Files, @Part("json") String description);
}
