OKHTTP工具类+日志拦截器

public class OkUtils {
    private OkHttpClient okHttpClient;
    private OkUtils() {
        //日志拦截器
        HttpLoggingInterceptor loggingInterceptor = new HttpLoggingInterceptor();
        okHttpClient = new OkHttpClient.Builder()
                .connectTimeout(20, TimeUnit.SECONDS)
                .readTimeout(20, TimeUnit.SECONDS)
                .writeTimeout(20, TimeUnit.SECONDS)
                .addInterceptor(loggingInterceptor)
                .build();
    }

    public static OkUtils getInstance() {
        return OkHolder.okUtils;
    }

    private static class OkHolder {
        private static final OkUtils okUtils = new OkUtils();
    }

    //这是同步的get和post
    public String getSync(String url) throws IOException {
        Request request = new Request.Builder().url(url).build();
        return okHttpClient.newCall(request).execute().body().string();
    }

    public String postSync(String url, String key, String value) throws IOException {
        RequestBody body = new FormBody.Builder().add(key, value).build();
        Request request = new Request.Builder().url(url).post(body).build();
        return okHttpClient.newCall(request).execute().body().string();
    }

    //异步的get和post

    public void getAsync(String url, Callback callback) {
        Request request = new Request.Builder().url(url).build();
        okHttpClient.newCall(request).enqueue(callback);
    }

    public void postAsync(String url, Callback callback) {
        RequestBody body = new FormBody.Builder().add("key", "value").build();
        Request request = new Request.Builder().url(url).post(body).build();
        okHttpClient.newCall(request).enqueue(callback);
    }

    //上传图片  必须是POST
    public void upLoadImage(String url, String uid, Callback callback) {
        File file = new File(Environment.getExternalStorageDirectory() + "/Pictures/test.jpg");
        //上传图片需要 MultipartBody
        MultipartBody.Builder body = new MultipartBody.Builder().setType(MultipartBody.FORM)
                .addFormDataPart("uid", uid)
                .addFormDataPart("file", "test.jpg", RequestBody.create(MediaType.parse("image/jpg"), file));
        RequestBody body1 = body.build();
        Request request = new Request.Builder().url(url).post(body1).build();
        okHttpClient.newCall(request).enqueue(callback);


    }

}