【Android架构】基于MVP模式的Retrofit2+RXjava封装

最近有个新项目要做，搭建框架的时候，顺便梳理了下MVP模式，特此记录，欢迎大家指正。

项目地址：https://github.com/18702953620/MVPDemo

一 、首先是依赖

compile 'com.google.code.gson:gson:2.8.0' compile 'com.squareup.okhttp3:okhttp:3.4.1' compile 'com.yanzhenjie:permission:1.0.5' compile 'com.squareup.retrofit2:retrofit:2.3.0' compile 'io.reactivex.rxjava2:rxandroid:2.0.1' compile 'io.reactivex.rxjava2:rxjava:2.1.5' //ConverterFactory的String依赖包 compile 'com.squareup.retrofit2:converter-scalars:2.3.0' //ConverterFactory的Gson依赖包 compile 'com.squareup.retrofit2:converter-gson:2.3.0' //CallAdapterFactory的Rx依赖包 compile 'com.squareup.retrofit2:adapter-rxjava2:2.3.0' 

二、ApiServer，定义了一些接口

public interface ApiServer { @POST("shopping_login.htm") Observable<String> LoginByRx(@Field("username") String username, @Field("password") String password); } 

三、ApiRetrofit，初始化Retrofit、OkHttpClient，加入了拦截器

public class ApiRetrofit { public final String BASE_SERVER_URL = "https://wawa-api.vchangyi.com/"; private static ApiRetrofit apiRetrofit; private Retrofit retrofit; private OkHttpClient client; private ApiServer apiServer; private String TAG = "ApiRetrofit"; /** * 请求访问quest * response拦截器 */ private Interceptor interceptor = new Interceptor() { @Override public Response intercept(Chain chain) throws IOException { Request request = chain.request(); long startTime = System.currentTimeMillis(); Response response = chain.proceed(chain.request()); long endTime = System.currentTimeMillis(); long duration = endTime - startTime; MediaType mediaType = response.body().contentType(); String content = response.body().string(); Log.e(TAG, "----------Request Start----------------"); Log.e(TAG, "| " + request.toString() + request.headers().toString()); Log.e(TAG, "| Response:" + content); Log.e(TAG, "----------Request End:" + duration + "毫秒----------"); return response.newBuilder() .body(ResponseBody.create(mediaType, content)) .build(); } }; public ApiRetrofit() { client = new OkHttpClient.Builder() //添加log拦截器 .addInterceptor(interceptor) .connectTimeout(10, TimeUnit.SECONDS) .readTimeout(10, TimeUnit.SECONDS) .build(); retrofit = new Retrofit.Builder() .baseUrl(BASE_SERVER_URL) .addConverterFactory(GsonConverterFactory.create()) .addConverterFactory(ScalarsConverterFactory.create()) //支持RxJava2 .addCallAdapterFactory(RxJava2CallAdapterFactory.create()) .client(client) .build(); apiServer = retrofit.create(ApiServer.class); } public static ApiRetrofit getInstance() { if (apiRetrofit == null) { synchronized (Object.class) { if (apiRetrofit == null) { apiRetrofit = new ApiRetrofit(); } } } return apiRetrofit; } public ApiServer getApiService() { return apiServer; } } 

四、基类

1.BaseView，其中定义了常用的接口

public interface BaseView { /** * 显示dialog */ void showLoading(); /** * 隐藏 dialog */ void hideLoading(); /** * 显示错误信息 * * @param msg */ void showError(String msg); /** * 错误码 */ void onErrorCode(BaseModel model); } 

2.BaseModel

public class BaseModel<T> implements Serializable { private int errcode; private String errmsg; private T result; public int getErrcode() { return errcode; } public void setErrcode(int errcode) { this.errcode = errcode; } public String getErrmsg() { return errmsg; } public void setErrmsg(String errmsg) { this.errmsg = errmsg; } public T getResult() { return result; } public void setResult(T result) { this.result = result; } } 

3.BasePresenter

public class BasePresenter<V extends BaseView> { private CompositeDisposable compositeDisposable; public V baseView; protected ApiServer apiServer = ApiRetrofit.getInstance().getApiService(); public BasePresenter(V baseView) { this.baseView = baseView; } /** * 解除绑定 */ public void detachView() { baseView = null; removeDisposable(); } /** * 返回 view * * @return */ public V getBaseView() { return baseView; } public void addDisposable(Observable<?> observable, BaseObserver observer) { if (compositeDisposable == null) { compositeDisposable = new CompositeDisposable(); } compositeDisposable.add(observable.subscribeOn(Schedulers.io()) .observeOn(AndroidSchedulers.mainThread()) .subscribeWith(observer)); } public void removeDisposable() { if (compositeDisposable != null) { compositeDisposable.dispose(); } } } 

4.BaseObserver，主要处理了常见的错误

public abstract class BaseObserver<T> extends DisposableObserver<T> { protected BaseView view; /** * 解析数据失败 */ public static final int PARSE_ERROR = 1001; /** * 网络问题 */ public static final int BAD_NETWORK = 1002; /** * 连接错误 */ public static final int CONNECT_ERROR = 1003; /** * 连接超时 */ public static final int CONNECT_TIMEOUT = 1004; public BaseObserver(BaseView view) { this.view = view; } @Override protected void onStart() { if (view != null) { view.showLoading(); } } @Override public void onNext(T o) { try { BaseModel model = (BaseModel) o; if (model.getErrcode() == 0) { onSuccess(o); } else { if (view != null) { view.onErrorCode(model); } } } catch (Exception e) { e.printStackTrace(); onError(e.toString()); } } @Override public void onError(Throwable e) { if (view != null) { view.hideLoading(); } if (e instanceof HttpException) { // HTTP错误 onException(BAD_NETWORK); } else if (e instanceof ConnectException || e instanceof UnknownHostException) { // 连接错误 onException(CONNECT_ERROR); } else if (e instanceof InterruptedIOException) { // 连接超时 onException(CONNECT_TIMEOUT); } else if (e instanceof JsonParseException || e instanceof JSONException || e instanceof ParseException) { // 解析错误 onException(PARSE_ERROR); } else { if (e != null) { onError(e.toString()); } else { onError("未知错误"); } } } private void onException(int unknownError) { switch (unknownError) { case CONNECT_ERROR: onError("连接错误"); break; case CONNECT_TIMEOUT: onError("连接超时"); break; case BAD_NETWORK: onError("网络问题"); break; case PARSE_ERROR: onError("解析数据失败"); break; default: break; } } @Override public void onComplete() { if (view != null) { view.hideLoading(); } } public abstract void onSuccess(T o); public abstract void onError(String msg); } 

5.BaseActivity，实现BaseView，处理了Presenter的生命周期。

public abstract class BaseActivity<P extends BasePresenter> extends AppCompatActivity implements BaseView { public Context context; private ProgressDialog dialog; public Toast toast; protected P presenter; protected abstract P createPresenter(); protected abstract int getLayoutId(); @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); context = this; setContentView(getLayoutId()); presenter = createPresenter(); initView(); initData(); } public void initData() { } public void initView() { } @Override protected void onDestroy() { super.onDestroy(); if (presenter != null) { presenter.detachView(); } } /** * @param s */ public void showtoast(String s) { if (toast == null) { toast = Toast.makeText(getApplicationContext(), s, Toast.LENGTH_LONG); } toast.show(); } private void closeLoadingDialog() { if (dialog != null && dialog.isShowing()) { dialog.dismiss(); } } private void showLoadingDialog() { if (dialog == null) { dialog = new ProgressDialog(context); } dialog.setCancelable(false); dialog.show(); } @Override public void showLoading() { showLoadingDialog(); } @Override public void hideLoading() { closeLoadingDialog(); } @Override public void showError(String msg) { showtoast(msg); } @Override public void onErrorCode(BaseModel model) { } @Override public void showLoadingFileDialog() { showFileDialog(); } @Override public void hideLoadingFileDialog() { hideFileDialog(); } @Override public void onProgress(long totalSize, long downSize) { if (dialog != null) { dialog.setProgress((int) (downSize * 100 / totalSize)); } } } 

五、如上，框架已经搭建好了，让我们来看看在实际项目中怎么用。

我们来模拟登陆
1.定义LoginView 继承于BaseView

public interface LoginView extends BaseView { void onLoginSucc(); } 

2.定义LoginPresenter 继承于BasePresenter

public class LoginPresenter extends BasePresenter<LoginView> { public LoginPresenter(LoginView baseView) { super(baseView); } public void login(String name, String pwd) { addDisposable(apiServer.LoginByRx(name, pwd), new BaseObserver(baseView) { @Override public void onSuccess(Object o) { baseView.onLoginSucc(); } @Override public void onError(String msg) { baseView.showError(msg); } }); } } 

3.LoginActivity 中使用

public class LoginActivity extends BaseActivity<LoginPresenter> implements LoginView { private AutoCompleteTextView mEmailView; private EditText mPasswordView; @Override protected LoginPresenter createPresenter() { return new LoginPresenter(this); } @Override protected int getLayoutId() { return R.layout.activity_login; } @Override public void initView() { mEmailView = (AutoCompleteTextView) findViewById(R.id.email); mPasswordView = (EditText) findViewById(R.id.password); Button mEmailSignInButton = (Button) findViewById(R.id.email_sign_in_button); mEmailSignInButton.setOnClickListener(new OnClickListener() { @Override public void onClick(View view) { //示例代码，示例接口 presenter.login(mEmailView.getText().toString(), mPasswordView.getText().toString()); } }); } @Override public void onLoginSucc() { //Login Succ showtoast("登录成功"); } } 

以上就是MVP的实现，MVP的框架很多，适合自己就好。

原文发布时间为：2018-07-31
本文作者： chenghuan3
本文来自云栖社区合作伙伴“ 安卓巴士Android开发者门户”，了解相关信息可以关注“ 安卓巴士Android开发者门户”。