【Android架构】基于MVP模式的Retrofit2+RXjava封装（一）

#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。

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;
}

publi
4000
c 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&
b34c
lt;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");

}
}

总结：以上就是MVP的实现，MVP的框架很多，适合自己就好。

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