简单实用拦截器

写上在说

<uses-permission android:name="android.permission.INTERNET"></uses-permission>

依赖

compile 'com.squareup.okhttp3:okhttp:3.9.1'

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="com.example.disanfangdenglu.MainActivity">

    <Button
        android:id="@+id/button_send"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="发送"/>

</android.support.constraint.ConstraintLayout>

MainActivity

package com.example.disanfangdenglu;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;

import java.io.IOException;
import java.util.concurrent.TimeUnit;

import okhttp3.Call;
import okhttp3.Callback;
import okhttp3.FormBody;
import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.RequestBody;
import okhttp3.Response;

public class MainActivity extends AppCompatActivity implements View.OnClickListener {

    private Button send;
    private OkHttpClient okHttpClient;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        initView();
        //应用拦截器
        okHttpClient = new OkHttpClient.Builder()
                .readTimeout(15, TimeUnit.SECONDS)
                .writeTimeout(20, TimeUnit.SECONDS)
                .connectTimeout(20, TimeUnit.SECONDS)
                .addInterceptor(new MyInterceptor())
                .addInterceptor(new LoggingInterceptor())//应用拦截器
                //.addNetworkInterceptor(new LoggingInterceptor())//网络拦截器
                .build();

    }

    private void initView() {
        //找到控件
        send = findViewById(R.id.button_send);
        send.setOnClickListener(this);
    }

    @Override
    public void onClick(View v) {
        switch (v.getId()) {
            default:
                break;
            case R.id.button_send:
                //加参数
                Request request = new Request.Builder()
                        .url("https://www.zhaoapi.cn/user/login")
                        .build();
                okHttpClient.newCall(request).enqueue(new Callback() {
                    @Override
                    public void onFailure(Call call, IOException e) {

                    }

                    @Override
                    public void onResponse(Call call, Response response) throws IOException {
                        String string = response.body().string();
                    }
                });
                break;
        }
    }


    private void method1() {
        Request request = new Request.Builder()
                .url("http://www.publicobject.com/helloworld.txt")
                .header("User-Agent", "OkHttp Example")
                .build();

        okHttpClient.newCall(request).enqueue(new Callback() {
            @Override
            public void onFailure(Call call, IOException e) {

            }

            @Override
            public void onResponse(Call call, Response response) throws IOException {

            }
        });
    }
}

MyInterceptor

package com.example.disanfangdenglu;

import java.io.IOException;

import okhttp3.FormBody;
import okhttp3.Interceptor;
import okhttp3.Request;
import okhttp3.RequestBody;
import okhttp3.Response;

/**
 * 姓名：${user}
 * 时间：${date}
 */

public class MyInterceptor implements Interceptor {
    @Override
    public Response intercept(Chain chain) throws IOException {
        //获取原始的Request
        Request orginRequest = chain.request();


        //获取原始的地址
        String url = orginRequest.url().toString();
        //拼接地址，添加参数
        String resultUrl = url + "?mobile=18310830365&password=123456";

        //把拼接好的地址发送请求
        Request request = new Request.Builder().url(resultUrl).build();
        Response response = chain.proceed(request);

        return response;
    }
}

LoggingInterceptor

package com.example.disanfangdenglu;

import android.util.Log;

import java.io.IOException;

import okhttp3.Interceptor;
import okhttp3.Request;
import okhttp3.Response;

/**
 * 姓名：${user}
 * 时间：${date}
 */

public class LoggingInterceptor implements Interceptor {
    @Override
    public Response intercept(Chain chain) throws IOException {
        Request request = chain.request();

        long t1 = System.nanoTime();
        Log.i("LoggingInterceptor", String.format("Sending request %s on %s%n%s",
                request.url(), chain.connection(), request.headers()));

        Response response = chain.proceed(request);

        long t2 = System.nanoTime();
        Log.i("LoggingInterceptor", String.format("Received response for %s in %.1fms%n%s",
                response.request().url(), (t2 - t1) / 1e6d, response.headers()));

        return response;
    }
}