前两篇已经将Retrofit和RxAndroid应用到了项目中,这篇本打算直接将Dagger2引进项目,但是考虑到整个项目结构,就来个结构整理吧,一起来看看网上炒得火热MVP模式。
说到MVP就不得不提到MVC,做过J2EE的猿友们肯定知道MVC是个什么东西。MVC即 Model、View、Controller, 那MVP就Model、View、Presenter。Model用于提供数据模型,View用于显示数据,当然Presenter也就用来处理业务逻辑并将数据显示数据到View上了,它是Model和View的桥梁。
想更清晰的理解MPV如何工作,那就直接上代码吧。
我将整个项目分为三个Module,如下图
一、数据处理模块domain(包含Model),这里的domain命名只是我喜欢这样把数据处理相关的东西都放在这里。
ServiceManager用于向外提供数据的入口(其他类代码在前面博文中已提及)
package com.micky.retrofitrxandroiddragger2.domain.service; import retrofit.GsonConverterFactory; import retrofit.Retrofit; import retrofit.RxJavaCallAdapterFactory; /** * @Project RetrofitRxAndroidDragger2 * @Packate com.micky.retrofitrxandroiddragger2.domain.service * @Description * @Author Micky Liu * @Email [email protected] * @Date 2015-12-22 14:43 * @Version 1.0 */ public class ServiceManager { private static final String ENDPOINT = "http://ip.taobao.com"; private static class ServiceManagerHolder { private static final ServiceManager INSTANCE = new ServiceManager(); } private ServiceManager() {} public static final ServiceManager getInstance() { return ServiceManagerHolder.INSTANCE; } private ApiService mApiService = null; public ApiService getApiService() { if (mApiService == null) { Retrofit retrofit = new Retrofit.Builder() .baseUrl(ENDPOINT) .addConverterFactory(GsonConverterFactory.create()) .addCallAdapterFactory(RxJavaCallAdapterFactory.create()) .build(); mApiService = retrofit.create(ApiService.class); return mApiService; } return mApiService; } }
二、View和Presenter模块
为了方便管理我将View和Presenter相关类都放在Presentation模块中
View接口
/** * @Project RetrofitRxAndroidDragger2 * @Packate com.micky.presentation * @Description * @Author Micky Liu * @Email [email protected] * @Date 2015-12-22 13:55 * @Version 1.0 */ public interface MainView { void showProgress(); void hideProgress(); void setIpText(String text); }
Presenter接口
package com.micky.retrofitrxandroiddragger2.presenter; /** * @Project RetrofitRxAndroidDragger2 * @Packate com.micky.presentation * @Description * @Author Micky Liu * @Email [email protected] * @Date 2015-12-22 13:46 * @Version 1.0 */ public interface MainPresenter extends BasePresenter { void getIpInfo(String ip); }
Presenter实现类
package com.micky.retrofitrxandroiddragger2.presenter.impl; import android.text.TextUtils; import android.util.Log; import android.widget.Toast; import com.micky.retrofitrxandroiddragger2.BaseApplication; import com.micky.retrofitrxandroiddragger2.R; import com.micky.retrofitrxandroiddragger2.domain.service.ServiceManager; import com.micky.retrofitrxandroiddragger2.domain.service.response.GetIpInfoResponse; import com.micky.retrofitrxandroiddragger2.presenter.MainPresenter; import com.micky.retrofitrxandroiddragger2.presenter.impl.BasePresenterImpl; import com.micky.retrofitrxandroiddragger2.ui.view.MainView; import rx.Subscriber; import rx.android.schedulers.AndroidSchedulers; import rx.schedulers.Schedulers; /** * @Project RetrofitRxAndroidDragger2 * @Packate com.micky.retrofitrxandroiddragger2.presenter * @Description * @Author Micky Liu * @Email [email protected] * @Date 2015-12-22 14:33 * @Version 1.0 */ public class MainPresenterImpl extends BasePresenterImpl implements MainPresenter { private static final String TAG = "TAG"; private MainView mMainView; public MainPresenterImpl(MainView mainView) { mMainView = mainView; } @Override public void getIpInfo(String ip) { if (TextUtils.isEmpty(ip)) { Toast.makeText(BaseApplication.getContext(), R.string.input_tip_ip, Toast.LENGTH_SHORT).show(); return; } mMainView.setIpText(""); mMainView.showProgress(); ServiceManager.getInstance().getApiService().getIpInfo(ip) .subscribeOn(Schedulers.io()) .observeOn(AndroidSchedulers.mainThread()) .subscribe(new Subscriber<GetIpInfoResponse>() { @Override public void onCompleted() { mMainView.hideProgress(); } @Override public void onError(Throwable e) { Log.e(TAG, e.getMessage(), e); mMainView.hideProgress(); mMainView.setIpText(BaseApplication.getContext().getString(R.string.network_error)); } @Override public void onNext(GetIpInfoResponse getIpInfoResponse) { mMainView.setIpText(getIpInfoResponse.data.country + " " + getIpInfoResponse.data.area); } }); } }
MainActivity
package com.micky.retrofitrxandroiddragger2.ui.activity; import android.os.Bundle; import android.support.design.widget.FloatingActionButton; import android.support.v7.app.AppCompatActivity; import android.support.v7.widget.Toolbar; import android.view.View; import android.view.Menu; import android.view.MenuItem; import android.widget.EditText; import android.widget.ProgressBar; import android.widget.TextView; import com.micky.retrofitrxandroiddragger2.R; import com.micky.retrofitrxandroiddragger2.presenter.MainPresenter; import com.micky.retrofitrxandroiddragger2.presenter.impl.MainPresenterImpl; import com.micky.retrofitrxandroiddragger2.ui.view.MainView; /** * @Project RetrofitRxAndroidDragger2 * @Packate com.micky.presentation * @Description * @Author Micky Liu * @Email [email protected] * @Date 2015-12-22 12:22 * @Version 1.0 */ public class MainActivity extends AppCompatActivity implements MainView { private EditText mEtIp; private TextView mTvContent; private ProgressBar mProgressBar; private MainPresenter mMainPresenter; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar); setSupportActionBar(toolbar); mEtIp = (EditText) findViewById(R.id.et_ip); mTvContent = (TextView) findViewById(R.id.tv_content); mProgressBar = (ProgressBar) findViewById(R.id.progress_bar); mMainPresenter = new MainPresenterImpl(this); FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab); fab.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { mMainPresenter.getIpInfo(mEtIp.getText().toString()); } }); } @Override public boolean onCreateOptionsMenu(Menu menu) { getMenuInflater().inflate(R.menu.menu_main, menu); return true; } @Override public boolean onOptionsItemSelected(MenuItem item) { int id = item.getItemId(); if (id == R.id.action_settings) { return true; } return super.onOptionsItemSelected(item); } @Override public void showProgress() { mProgressBar.setVisibility(View.VISIBLE); } @Override public void hideProgress() { mProgressBar.setVisibility(View.GONE); } @Override public void setIpText(String text) { mTvContent.setText(text); } }
仔细研究下不难发现这M、V、P三者的关系还是挺清晰的。
为了让大家更清晰的理解,请看如下时序图(MainView只是为了更好的展示调用与数据流程而特意画出来的)
看到这里,是不是觉得so simple! 呢。
详细代码在老地方: https://github.com/mickyliu945/CommonProj