Upload binary file with retrofit 2 in Android

Upload binary file with retrofit 2 in Android

To upload a binary file (such as an image, PDF, etc.) using Retrofit 2 in Android, you need to create an endpoint in your API that accepts multipart form data. Then, you can use Retrofit's @Multipart annotation along with @Part annotations to send the binary file in the request.

Here's an example of how you can do this:

  1. Define the API endpoint:
public interface FileUploadService { @Multipart @POST("upload") Call<Void> uploadFile(@Part MultipartBody.Part file); }
  1. Create a Retrofit instance:
Retrofit retrofit = new Retrofit.Builder() .baseUrl("https://your-api-base-url.com/") .addConverterFactory(GsonConverterFactory.create()) .build(); FileUploadService service = retrofit.create(FileUploadService.class);
  1. Prepare the file to upload:
// Create a File object representing the binary file to upload File file = new File("path/to/your/file"); // Create a request body with the file's content type RequestBody requestBody = RequestBody.create(MediaType.parse("application/octet-stream"), file); // Wrap the request body in a MultipartBody.Part object MultipartBody.Part filePart = MultipartBody.Part.createFormData("file", file.getName(), requestBody);
  1. Make the API call:
Call<Void> call = service.uploadFile(filePart); call.enqueue(new Callback<Void>() { @Override public void onResponse(Call<Void> call, Response<Void> response) { if (response.isSuccessful()) { // File uploaded successfully // Handle success } else { // File upload failed // Handle error } } @Override public void onFailure(Call<Void> call, Throwable t) { // Network error or other error occurred // Handle error } });

In this example:

  • We define an API interface FileUploadService with a single method uploadFile that accepts a MultipartBody.Part parameter.
  • We create a Retrofit instance and initialize the FileUploadService.
  • We prepare the binary file to upload by creating a File object and wrapping it in a RequestBody, then creating a MultipartBody.Part object.
  • We make the API call using Retrofit's enqueue method, passing a callback to handle the response.

Make sure to replace "https://your-api-base-url.com/" with the base URL of your API and "path/to/your/file" with the actual path to the file you want to upload.

Additionally, ensure that your server-side API endpoint is configured to accept multipart form data and handle file uploads appropriately.

Examples

  1. "How to upload a binary file with Retrofit 2 in Android"

    Description: This query seeks a guide on uploading binary files (such as images, videos, etc.) using Retrofit 2 in Android.

    // Java code to upload a binary file with Retrofit 2 in Android File file = new File("path_to_your_binary_file"); RequestBody requestBody = RequestBody.create(MediaType.parse("application/octet-stream"), file); MultipartBody.Part filePart = MultipartBody.Part.createFormData("file", file.getName(), requestBody); Call<ResponseBody> call = yourRetrofitInterface.uploadFile(filePart); call.enqueue(new Callback<ResponseBody>() { @Override public void onResponse(Call<ResponseBody> call, Response<ResponseBody> response) { // Handle successful upload } @Override public void onFailure(Call<ResponseBody> call, Throwable t) { // Handle upload failure } });

  2. "Uploading binary files using Retrofit 2 in Android"

    Description: This query is about the process of uploading binary files using Retrofit 2 library in Android.

    // Java code for uploading binary files with Retrofit 2 in Android File file = new File("path_to_your_binary_file"); RequestBody requestBody = RequestBody.create(MediaType.parse("application/octet-stream"), file); MultipartBody.Part filePart = MultipartBody.Part.createFormData("file", file.getName(), requestBody); Call<ResponseBody> call = yourRetrofitInterface.uploadFile(filePart); call.enqueue(new Callback<ResponseBody>() { @Override public void onResponse(Call<ResponseBody> call, Response<ResponseBody> response) { // Handle successful upload } @Override public void onFailure(Call<ResponseBody> call, Throwable t) { // Handle upload failure } });

  3. "How to send binary file using Retrofit 2 in Android"

    Description: This query focuses on sending binary files (e.g., images, videos) using Retrofit 2 in Android.

    // Java code for sending a binary file with Retrofit 2 in Android File file = new File("path_to_your_binary_file"); RequestBody requestBody = RequestBody.create(MediaType.parse("application/octet-stream"), file); MultipartBody.Part filePart = MultipartBody.Part.createFormData("file", file.getName(), requestBody); Call<ResponseBody> call = yourRetrofitInterface.uploadFile(filePart); call.enqueue(new Callback<ResponseBody>() { @Override public void onResponse(Call<ResponseBody> call, Response<ResponseBody> response) { // Handle successful upload } @Override public void onFailure(Call<ResponseBody> call, Throwable t) { // Handle upload failure } });

  4. "Uploading binary data using Retrofit 2 in Android"

    Description: This query involves uploading binary data (e.g., images, videos) with Retrofit 2 in an Android application.

    // Java code for uploading binary data with Retrofit 2 in Android File file = new File("path_to_your_binary_file"); RequestBody requestBody = RequestBody.create(MediaType.parse("application/octet-stream"), file); MultipartBody.Part filePart = MultipartBody.Part.createFormData("file", file.getName(), requestBody); Call<ResponseBody> call = yourRetrofitInterface.uploadFile(filePart); call.enqueue(new Callback<ResponseBody>() { @Override public void onResponse(Call<ResponseBody> call, Response<ResponseBody> response) { // Handle successful upload } @Override public void onFailure(Call<ResponseBody> call, Throwable t) { // Handle upload failure } });

  5. "Sending binary file in Android with Retrofit 2"

    Description: This query explores how to send a binary file using Retrofit 2 in an Android application.

    // Java code for sending a binary file with Retrofit 2 in Android File file = new File("path_to_your_binary_file"); RequestBody requestBody = RequestBody.create(MediaType.parse("application/octet-stream"), file); MultipartBody.Part filePart = MultipartBody.Part.createFormData("file", file.getName(), requestBody); Call<ResponseBody> call = yourRetrofitInterface.uploadFile(filePart); call.enqueue(new Callback<ResponseBody>() { @Override public void onResponse(Call<ResponseBody> call, Response<ResponseBody> response) { // Handle successful upload } @Override public void onFailure(Call<ResponseBody> call, Throwable t) { // Handle upload failure } });

  6. "How to upload binary data with Retrofit 2 in Android"

    Description: This query is about uploading binary data (e.g., images, videos) using Retrofit 2 library in Android.

    // Java code for uploading binary data with Retrofit 2 in Android File file = new File("path_to_your_binary_file"); RequestBody requestBody = RequestBody.create(MediaType.parse("application/octet-stream"), file); MultipartBody.Part filePart = MultipartBody.Part.createFormData("file", file.getName(), requestBody); Call<ResponseBody> call = yourRetrofitInterface.uploadFile(filePart); call.enqueue(new Callback<ResponseBody>() { @Override public void onResponse(Call<ResponseBody> call, Response<ResponseBody> response) { // Handle successful upload } @Override public void onFailure(Call<ResponseBody> call, Throwable t) { // Handle upload failure } });

  7. "Uploading binary file via Retrofit 2 in Android"

    Description: This query is about the process of uploading a binary file using Retrofit 2 library in an Android application.

    // Java code for uploading binary file via Retrofit 2 in Android File file = new File("path_to_your_binary_file"); RequestBody requestBody = RequestBody.create(MediaType.parse("application/octet-stream"), file); MultipartBody.Part filePart = MultipartBody.Part.createFormData("file", file.getName(), requestBody); Call<ResponseBody> call = yourRetrofitInterface.uploadFile(filePart); call.enqueue(new Callback<ResponseBody>() { @Override public void onResponse(Call<ResponseBody> call, Response<ResponseBody> response) { // Handle successful upload } @Override public void onFailure(Call<ResponseBody> call, Throwable t) { // Handle upload failure } });

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