OkHttp中拦截器

client = new OkHttpClient.Builder()
                .connectTimeout(3000,TimeUnit.MILLISECONDS)
                .writeTimeout(3000,TimeUnit.MILLISECONDS)
                .readTimeout(3000,TimeUnit.MILLISECONDS)
                .addInterceptor(new OKHeaderInterceptor(headers))
                .addInterceptor(new OkLogInterceptor())
                .build();

//OKHeaderInterceptor

public class OKHeaderInterceptor implements Interceptor {
    private Map<String,String>  headers;

    public OKHeaderInterceptor(Map headers) {
        this.headers = headers;
    }

    @Override
    public Response intercept(Chain chain) throws IOException {
        Request request=chain.request();
        Request.Builder builder=request.newBuilder();
        if(headers!=null){
            Set set = headers.keySet();
            Iterator iterator = set.iterator();
            while (iterator.hasNext()){
                String next = (String) iterator.next();
                builder.addHeader(next,headers.get(next));
            }
        }
        request=builder.build();
        return chain.proceed(request);
    }
}

OkLogInterceptor
//LogUtil

public class LogUtil {
    public static void init(){
        FormatStrategy formatStrategy=PrettyFormatStrategy.newBuilder()
                .showThreadInfo(false)
                .methodCount(0)
                .methodOffset(7)
                .logStrategy(null)
                .build();
        Logger.addLogAdapter(new AndroidLogAdapter(formatStrategy));
    }
    public static void json(String json){
        if(!TextUtils.isEmpty(json)){
            Logger.json(json);
        }
    }
    public static void json(String tag,String json){
        if(!TextUtils.isEmpty(json)){
            Logger.t(tag).json(json);
        }
    }
    public static void d(String msg){
        if(!TextUtils.isEmpty(msg)){
            Logger.d(msg);
        }
    }
    public static void d(String tag,String msg){
        if(!TextUtils.isEmpty(msg)){
            Logger.t(tag).json(msg);
        }
    }
    public static void e(String msg){
        if(!TextUtils.isEmpty(msg)){
            Logger.e(msg);
        }
    }
    public static void w(String msg){
        if(!TextUtils.isEmpty(msg)){
            Logger.e(msg);
        }
    }
    public static void v(String msg){
        if(!TextUtils.isEmpty(msg)){
            Logger.e(msg);
        }
    }
    public static void i(String msg){
        if(!TextUtils.isEmpty(msg)){
            Logger.e(msg);
        }
    }
}

//OkLogInterceptor

public class OkLogInterceptor implements Interceptor {

    @Override
    public Response intercept(Chain chain) throws IOException {
        Request request=chain.request();
        String method = request.method();
        HttpUrl url = request.url();
        LogUtil.d("本次请求","url:"+url.toString()+" method:"+method);
        Headers headers = request.headers();
        Set<String> names = headers.names();
        Iterator<String> iterator = names.iterator();
        while (iterator.hasNext()){
            String next = iterator.next();
            String value = headers.get(next);
            LogUtil.d(next+":"+value);
        }
        return chain.proceed(request);
    }
}

//初始化（别忘了AndroidManifest.xml中添加name属性）

public class App extends Application {

    public static Context context;
    @Override
    public void onCreate() {
        super.onCreate();
        context=this;
        LogUtil.init();
        initHttpHeader();
    }

    private void initHttpHeader() {
        HashMap<String, String> headers = new HashMap<>();
        SharedPreferences sharedPreferences = getSharedPreferences(Constant.SP_NAME, MODE_PRIVATE);
        headers.put("token",sharedPreferences.getString("token",""));
        headers.put("version","version1.0");
        headers.put("platform","android");
        OkHttp.init(headers);
    }
}