Retrofit 和 rxjava2的简单使用和封装utils 和日志拦截器+接口回调简单使用

依赖*********注意网络权限

//rxjava依赖
    implementation 'io.reactivex.rxjava2:rxandroid:2.0.2'
    implementation 'io.reactivex.rxjava2:rxjava:2.0.2'
//retrofit依赖
    implementation 'com.squareup.retrofit2:retrofit:2.0.2'
    implementation 'com.squareup.retrofit2:adapter-rxjava2:2.3.0'
    implementation 'com.squareup.retrofit2:converter-gson:2.0.2'

Bean包存放地址中的数据后创建Api接口

public interface Api {
    @FormUrlEncoded
    @POST("user/login")
    Observable<User> login(@Field("mobile")String mobile,@Field("password")String password);
}

创建Contance类和Api拼接

public class Contance {
    public final static String URL_Post = "https://www.zhaoapi.cn";
}

MainActivity中调用封装工具类并且打印

public class MainActivity extends AppCompatActivity {
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        Observable<User> login = HttpUtils.getHttpUtilsInstance().apiClient.login("18611520300", "123123");
        login.subscribeOn(Schedulers.io()).observeOn(AndroidSchedulers.mainThread()).subscribe(new Observer<User>() {
            @Override
            public void onSubscribe(Disposable d) {
            }
            @Override
            public void onNext(User user) {
                Log.i("aaa","+++++++"+user.getData().getMobile());
            }
            @Override
            public void onError(Throwable e) {
            }
            @Override
            public void onComplete() {
            }
        });
    }
}

封装utils

public class HttpUtils {
    public final Api apiClient;

    private HttpUtils() {
        Retrofit retrofit = new Retrofit.Builder().baseUrl(Contance.URL_Post)
                .addConverterFactory(GsonConverterFactory.create())
                .addCallAdapterFactory(RxJava2CallAdapterFactory.create())
                .build();
        apiClient = retrofit.create(Api.class);
    }

    private static class GetsHttpUtilsInstance {
        private static HttpUtils httpUtils = new HttpUtils();
    }

    public static HttpUtils getHttpUtilsInstance(){
        return GetsHttpUtilsInstance.httpUtils;
    }

}

添加拦截器，直接在封装类中写内部类，并且在HttpUtils方法中调用

 private HttpUtils() {
        //拦截器
        OkHttpClient okHttpClient = new OkHttpClient.Builder().addNetworkInterceptor(new LoggingInterceptor()).build();
        Retrofit retrofit = new Retrofit.Builder().baseUrl(Contance.URL_Post)
                .addConverterFactory(GsonConverterFactory.create())
                .addCallAdapterFactory(RxJava2CallAdapterFactory.create())
                .client(okHttpClient)
                .build();
        apiClient = retrofit.create(Api.class);
    }

    class LoggingInterceptor implements Interceptor{

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

            long t1 = System.nanoTime();
            //logger.info(String.format("Sending request %s on %s%n%s",
            //       request.url(), chain.connection(), request.headers()));

            Response response = chain.proceed(request);

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

            return response;
        }
    }

（***）接口回调

adapter中直接写，然后创建的对应适配器的地方就可以直接调用OnItemClickListener方法来操作

//点击事件
    public interface OnItemClickListener{
        void onItemClick(View view, int position);
    }
    public void setOnItemClickListener(OnItemClickListener mOnItemClickListener){
        this.mOnItemClickListener = mOnItemClickListener;
    }