一、Android json数据Log格式化打印

Android项目中的网络请求返回的数据一般都是json格式，而且可能很长，在log中就是长长的一大串堆在那里，还需要复制出来进行格式化处理，很麻烦。

解决方案代码如下：

public static final String LINE_SEPARATOR = System.getProperty("line.separator");
 
    public static void printLine(String tag, boolean isTop) {
        if (isTop) {
            Log.d(tag, "╔═══════════════════════════════════════════════════════════════════════════════════════");
        } else {
            Log.d(tag, "╚═══════════════════════════════════════════════════════════════════════════════════════");
        }
    }
    public static void printJson(String tag, String msg, String headString) {
 
        String message;
 
        try {
            if (msg.startsWith("{")) {
                JSONObject jsonObject = new JSONObject(msg);
                message = jsonObject.toString(4);//最重要的方法，就一行，返回格式化的json字符串，其中的数字4是缩进字符数
            } else if (msg.startsWith("[")) {
                JSONArray jsonArray = new JSONArray(msg);
                message = jsonArray.toString(4);
            } else {
                message = msg;
            }
        } catch (JSONException e) {
            message = msg;
        }
 
        printLine(tag, true);
        message = headString + LINE_SEPARATOR + message;
        String[] lines = message.split(LINE_SEPARATOR);
        for (String line : lines) {
            Log.d(tag, "║ " + line);
        }
        printLine(tag, false);
    }

二、Retrofit打印请求地址和返回内容

​ 用过retrofit的同学，肯定会很爽，因为用起来实在是方便。但是我之前在使用retrofit的时候，发现没法打印出网络请求日志，包括请求urll、返回内容等。要实现打印日志，就要用到HttpLoggingInterceptor这个类。下面给大家讲一下如何打印出这些内容。

1、导入库

 implementation 'com.squareup.retrofit2:retrofit:2.1.0'
 implementation 'com.squareup.retrofit2:converter-gson:2.1.0'
 implementation 'com.squareup.okhttp3:logging-interceptor:3.4.1'

2、初始化HttpLoggingInterceptor

HttpLoggingInterceptor loggingInterceptor = new HttpLoggingInterceptor(new HttpLoggingInterceptor.Logger() {
            @Override
            public void log(String message) {
                //Android json数据Log格式化打印
                 printJson("qqqqqq",message,"aaaaaa");
                //打印retrofit日志
                Log.i("RetrofitLog","retrofitBack = "+message);
            }
        });
        loggingInterceptor.setLevel(HttpLoggingInterceptor.Level.BODY);

3、配置okhttp

OkHttpClient client = new OkHttpClient.Builder()
                   // .cache(cache)
                    .addInterceptor(loggingInterceptor)
                    //.connectTimeout(mTimeOut, TimeUnit.SECONDS)
                    //.readTimeout(mTimeOut, TimeUnit.SECONDS)
                    //.writeTimeout(mTimeOut, TimeUnit.SECONDS)
                    .build();

4、截屏案例代码如下： Retrofit打印请求地址和返回内容.png

5、配置retrofit

Retrofit retrofit = new Retrofit.Builder()
                    .baseUrl(userCenter)
                    .client(getClient)
                    .addCallAdapterFactory(RxJavaCallAdapterFactory.create())
                    .addConverterFactory(GsonConverterFactory.create())
                    .build();

添加统一的请求头Header

1、导入库

 implementation 'com.squareup.retrofit2:retrofit:2.1.0'
 implementation 'com.squareup.retrofit2:converter-gson:2.1.0'
 implementation 'com.squareup.okhttp3:logging-interceptor:3.4.1'

2、初始化HttpLoggingInterceptor

  //设置headers
        Interceptor  interceptor = new Interceptor() {
            @Override
            public Response intercept(Chain chain) throws IOException {
                Request request = chain.request()
                        .newBuilder()
                        .addHeader("Accept", "application/json")
                        .addHeader("Content-Type", "application/json")
                        .addHeader("X-App-Id", "")
                        .addHeader("X-Access-Token", "UUEOTtGAnh7KM-OFlYWP0ya3PUCvtqlW")
                        .addHeader("X-UUID", "")
                        .build();
                return chain.proceed(request);
            }
        };

3、配置okhttp

OkHttpClient client = new OkHttpClient.Builder()                 
                    .addInterceptor(loggingInterceptor)
                    .addInterceptor(interceptor)
                    .build();

4、配置retrofit

Retrofit retrofit = new Retrofit.Builder()
                    .baseUrl(userCenter)
                    .client(getClient)
                    .addCallAdapterFactory(RxJavaCallAdapterFactory.create())
                    .addConverterFactory(GsonConverterFactory.create())
                    .build();