使用json数据下载图片(retrofit2 android)

implementation 'com.squareup.retrofit2:retrofit:2.x.x'
implementation 'com.squareup.retrofit2:converter-gson:2.x.x'

public interface ApiService {
    @GET("download/image/{imageName}") 
    Call<ResponseBody> downloadImage(@Path("imageName") String imageName);
}

Retrofit retrofit = new Retrofit.Builder()
    .baseUrl("http://your.server.url/")
    .addConverterFactory(GsonConverterFactory.create())
    .build();

ApiService apiService = retrofit.create(ApiService.class);

Call<ResponseBody> call = apiService.downloadImage("image.jpg");
call.enqueue(new Callback<ResponseBody>() {
    @Override
    public void onResponse(Call<ResponseBody> call, Response<ResponseBody> response) {
        if (response.isSuccessful()) {
            // 获取到服务器返回的图片数据
            ResponseBody responseBody = response.body();
            // 将图片数据保存到本地文件
            saveImageToDisk(responseBody);
        }
    }

    @Override
    public void onFailure(Call<ResponseBody> call, Throwable t) {
        // 处理请求失败的情况
    }
});

private void saveImageToDisk(ResponseBody body) {
    try {
        InputStream inputStream = body.byteStream();
        // 将输入流转换为Bitmap或者直接将输入流写入文件
        // ...
        // 关闭输入流
        inputStream.close();
    } catch (IOException e) {
        e.printStackTrace();
    }
}