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第1步 在build.gradle中引入
// Retrofit库implementation 'com.squareup.retrofit2:retrofit:2.3.0'implementation 'com.squareup.retrofit2:converter-gson:2.3.0'implementation 'com.squareup.retrofit2:adapter-rxjava2:2.3.0'// Okhttp库implementation 'com.squareup.okhttp3:okhttp:3.9.1'implementation 'io.reactivex.rxjava2:rxjava:2.1.5'implementation 'io.reactivex.rxjava2:rxandroid:2.0.1'（网络权限： <uses-permission android:name="android.permission.INTERNET"/>）
第2步 初始化和Base创建
2.1 LogInterceptor
import android.util.Log;import java.io.IOException;import okhttp3.Interceptor;
import okhttp3.MediaType;
import okhttp3.Request;
import okhttp3.RequestBody;
import okhttp3.Response;
import okhttp3.ResponseBody;
import okio.Buffer;public class LogInterceptor implements Interceptor {@Overridepublic Response intercept(Chain chain) throws IOException {Request request = chain.request();Log.e("info", String.format("%1$s->%2$s", request.method(), request.url()));if (request.headers() != null) {Log.e("info", "Headers:" + request.headers());}if (request.body() != null) {Log.e("info", "RequestBody:" + bodyToString(request.body()));}Response response = chain.proceed(chain.request());MediaType mediaType = response.body().contentType();String responseBody = response.body().string();Log.e("info", "ResponseBody:" + responseBody);return response.newBuilder().body(ResponseBody.create(mediaType, responseBody)).build();}private String bodyToString(final RequestBody request) {if (request != null) {try {final RequestBody copy = request;final Buffer buffer = new Buffer();copy.writeTo(buffer);return buffer.readUtf8();} catch (final IOException e) {Log.e("info", "Did not work.");}}return null;}
}
2.2 ApiManager
import java.util.concurrent.TimeUnit;import okhttp3.OkHttpClient;
import retrofit2.Retrofit;
import retrofit2.adapter.rxjava2.RxJava2CallAdapterFactory;
import retrofit2.converter.gson.GsonConverterFactory;public class ApiManager {private OkHttpClient mOkHttpClient;private static String mBaseUrl = "http://www.gwadarpro.com";private static int mTimeout = 20;private static ApiManager mInstance = new ApiManager();private Retrofit mRetrofit;public static ApiManager getInstance() {return mInstance;}private ApiManager() {}public <T> T getApiService(Class<T> service) {return getRetrofit().create(service);}private Retrofit getRetrofit() {if (mRetrofit == null) {mRetrofit = new Retrofit.Builder().baseUrl(mBaseUrl).addConverterFactory(GsonConverterFactory.create()).addCallAdapterFactory(RxJava2CallAdapterFactory.create()).client(getOkHttpClient()).build();}return mRetrofit;}private OkHttpClient getOkHttpClient() {if (mOkHttpClient == null) {mOkHttpClient = new OkHttpClient.Builder().connectTimeout(mTimeout, TimeUnit.SECONDS).readTimeout(mTimeout, TimeUnit.SECONDS).writeTimeout(mTimeout, TimeUnit.SECONDS).retryOnConnectionFailure(true).addInterceptor(new LogInterceptor()).build();}return mOkHttpClient;}
}2.3 ApiService(定义接口地址、参数):
import com.jlncjf.retrofit2demo.model.LoginBean;import io.reactivex.Observable;
import retrofit2.http.Field;
import retrofit2.http.FormUrlEncoded;
import retrofit2.http.POST;public interface ApiService {/*** 登录** @param username 用户名* @param password 密码* @param type 登录类型* @param google_token 谷歌推送token* @return*/@FormUrlEncoded@POST("/mobile/index.php?act=login&op=index")Observable<LoginBean> login(@Field("username") String username, @Field("password") String password, @Field("type") String type, @Field("google_token") String google_token);
}2.4 ApiObserver
import io.reactivex.Observable;
import io.reactivex.Observer;
import io.reactivex.android.schedulers.AndroidSchedulers;
import io.reactivex.annotations.NonNull;
import io.reactivex.disposables.Disposable;
import io.reactivex.schedulers.Schedulers;public class ApiObserver<T> implements Observer<T> {private final ApiCallback<T> mCallback;public ApiObserver(ApiCallback<T> callback) {this.mCallback = callback;}@Overridepublic void onSubscribe(@NonNull Disposable d) {}@Overridepublic void onError(Throwable e) {if (mCallback != null) {mCallback.onError(e);}}@Overridepublic void onNext(T t) {if (mCallback != null) {mCallback.onNext(t);}}@Overridepublic void onComplete() {if (mCallback != null) {mCallback.onCompleted();}}public static <T> ApiObserver<T> getApiObserver(ApiCallback<T> callback) {return new ApiObserver<>(callback);}public static <T> void subscribe(Observable<T> observable, SimpleCallback<T> callback) {observable.subscribeOn(Schedulers.io()).observeOn(AndroidSchedulers.mainThread()).subscribe(getApiObserver(callback));}}
2.5 ApiCallback：
public interface ApiCallback<T> {void onNext(T t);void onError(Throwable e);void onCompleted();}2.5 SimpleCallback
import com.jlncjf.retrofit2demo.mvp.View.BaseView;public abstract class SimpleCallback<T> implements ApiCallback<T> {private BaseView mView;public SimpleCallback(BaseView mView){this.mView = mView;}@Overridepublic void onError(Throwable e) {mView.onError(e);}@Overridepublic void onCompleted() {mView.onCompleted();}
}2.6 BaseBean（网络请求返回）：
public class BaseBean {private int errCode;private String errMess;public int getErrCode() {return errCode;}public void setErrCode(int errCode) {this.errCode = errCode;}public String getErrMess() {return errMess;}public void setErrMess(String errMess) {this.errMess = errMess;}
}2.7 BaseView：
public interface BaseView {void onError(Throwable e);void onCompleted();
}2.8 IPresenter
import com.jlncjf.retrofit2demo.mvp.View.BaseView;public interface IPresenter<T extends BaseView> {void attachView(T view);void detachView();
}2.9 BasePresenter：
import com.jlncjf.retrofit2demo.mvp.View.BaseView;public class BasePresenter<T extends BaseView> implements IPresenter<T> {protected T mView;@Overridepublic void attachView(T view) {mView = view;}@Overridepublic void detachView() {mView = null;}
}
2.10 BaseActivity：
import android.os.Bundle;
import android.support.annotation.LayoutRes;
import android.support.annotation.Nullable;
import android.support.v7.app.AppCompatActivity;import com.jlncjf.retrofit2demo.mvp.Presenter.BasePresenter;
import com.jlncjf.retrofit2demo.mvp.View.BaseView;public abstract class BaseActivity<T extends BasePresenter> extends AppCompatActivity implements BaseView {protected T mPresenter;protected BaseActivity mContext;@Overridepublic void onCreate(@Nullable Bundle savedInstanceState) {super.onCreate(savedInstanceState);mContext = this;setContentView(getRootViewId());initPresenter();if (mPresenter != null) {mPresenter.attachView(this);}initView();initData();}public abstract @LayoutResint getRootViewId();public abstract void initView();public abstract void initPresenter();public abstract void initData();@Overrideprotected void onDestroy() {super.onDestroy();if (mPresenter != null) {mPresenter.detachView();}}
}
2.11 Api
import com.jlncjf.retrofit2demo.model.LoginBean;public class Api {private static ApiService apiService;private Api() {throw new AssertionError();}private static ApiService getApiService() {if (apiService == null) {apiService = ApiManager.getInstance().getApiService(ApiService.class);}return apiService;}public static void login(String username, String password, String type, String google_token, SimpleCallback<LoginBean> callback) {ApiObserver.subscribe(getApiService().login(username, password, type, google_token), callback);}
}
3、具体实现
3.1 LoginBean(登录返回对应的实体类)
public class LoginBean extends BaseBean{private DataBean data;public DataBean getData() {return data;}public void setData(DataBean data) {this.data = data;}public static class DataBean {private String nickname;public String getNickname() {return nickname;}public void setNickname(String nickname) {this.nickname = nickname;}}
}3.2 ILoginView(定义View中需要的接口，比如拿到数据以后)
import com.jlncjf.retrofit2demo.model.LoginBean;public interface ILoginView extends BaseView {void onLoginData(LoginBean bean);
}3.3 LoginPresenter
import com.jlncjf.retrofit2demo.Api;
import com.jlncjf.retrofit2demo.mvp.View.ILoginView;
import com.jlncjf.retrofit2demo.SimpleCallback;
import com.jlncjf.retrofit2demo.mvp.model.LoginBean;public class LoginPresenter extends BasePresenter<ILoginView> {public void login(String username, String password, String type, String google_token) {Api.login(username, password, type, google_token, new SimpleCallback<LoginBean>(mView) {@Overridepublic void onNext(LoginBean bean) {mView.onLoginData(bean);}});}
}3.4 LoginActivity
import android.widget.TextView;import com.jlncjf.retrofit2demo.mvp.Presenter.LoginPresenter;
import com.jlncjf.retrofit2demo.mvp.View.ILoginView;
import com.jlncjf.retrofit2demo.mvp.model.LoginBean;public class LoginActivity extends BaseActivity<LoginPresenter> implements ILoginView {private static final String TAG = "LoginActivity";private TextView tv_result;@Overridepublic int getRootViewId() {return R.layout.activity_main;}@Overridepublic void initView() {tv_result = findViewById(R.id.tv_result);}@Overridepublic void initPresenter() {mPresenter = new LoginPresenter();}@Overridepublic void initData() {mPresenter.login("wangjinqiang", "qq", "0", "token");}@Overridepublic void onLoginData(LoginBean bean) {//根据登录返回的状态码做相应处理if (bean.getErrCode() == 200) {tv_result.setText(bean.getData().getNickname());} else {tv_result.setText("errCode:" + String.valueOf(bean.getErrCode()));}}@Overridepublic void onError(Throwable e) {tv_result.setText(e.getMessage());e.printStackTrace();}@Overridepublic void onCompleted() {}
}Demo下载地址：https://download.csdn.net/download/u012954039/10615514
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