使用okhttp上传图片到服务器

dependencies {
    implementation 'com.squareup.okhttp3:okhttp:4.9.1'
}

OkHttpClient client = new OkHttpClient();

MultipartBody.Builder builder = new MultipartBody.Builder()
        .setType(MultipartBody.FORM);

File file = new File("path/to/image.jpg");
builder.addFormDataPart("image", file.getName(),
        RequestBody.create(MediaType.parse("image/jpeg"), file));

RequestBody requestBody = builder.build();

Request request = new Request.Builder()
        .url("http://example.com/upload")
        .post(requestBody)
        .build();

client.newCall(request).enqueue(new Callback() {
    @Override
    public void onFailure(Call call, IOException e) {
        // 处理请求失败的情况
    }

    @Override
    public void onResponse(Call call, Response response) throws IOException {
        // 处理请求成功的情况
        if (response.isSuccessful()) {
            // 获取服务器返回的数据
            String responseData = response.body().string();
            // 处理数据
        }
    }
});