Android开发： okhttp发个post请求要求Content-Typemultipartform-data有示例代码吗

Sure! Here is an example code to send a POST request using OkHttp library in Android with Content-Type:multipart/form-data.

First, make sure you have added the OkHttp dependency in your app-level build.gradle file:

implementation 'com.squareup.okhttp3:okhttp:4.9.1'

Then, you can use the following code to send a POST request with multipart/form-data content type:

import okhttp3.MediaType;
import okhttp3.MultipartBody;
import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.RequestBody;
import okhttp3.Response;

import java.io.File;
import java.io.IOException;

public class OkHttpExample {

    public static void main(String[] args) {
        OkHttpClient client = new OkHttpClient();

        // Replace the URL with your actual endpoint
        String url = "https://example.com/api/upload";

        // Replace the file path with the actual file path you want to upload
        String filePath = "/path/to/your/file.txt";
        File file = new File(filePath);

        // Create request body with file and content type
        RequestBody requestBody = new MultipartBody.Builder()
                .setType(MultipartBody.FORM)
                .addFormDataPart("file", file.getName(),
                        RequestBody.create(MediaType.parse("multipart/form-data"), file))
                .build();

        // Create the request with POST method and set the request body
        Request request = new Request.Builder()
                .url(url)
                .post(requestBody)
                .build();

        try {
            // Execute the request and get the response
            Response response = client.newCall(request).execute();

            // Handle the response here
            if (response.isSuccessful()) {
                String responseBody = response.body().string();
                System.out.println("Response: " + responseBody);
            } else {
                System.out.println("Request failed with code: " + response.code());
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

Make sure to replace the url variable with the actual URL of your API endpoint and filePath with the actual file path you want to upload.

This code will send a POST request with the specified file as multipart/form-data and print the response from the server. You can modify it according to your specific requirements