Android MVP架构搭建

xiaoxiao2025-11-08 2

鸣谢

感谢泡在网上的日子用户@JesseBraveMan的两篇关于MVP架构的博文：Android MVP架构搭建和Android MVP升级路（二）时尚版。

摘要

Android中MVP架构的理论与使用，完整相关项目网站：基于MVP的特色河蟹大赛评比管理系统客户端。

开始

用架构和不用架构的区别是非常明显的，我们需要多多利用Java的接口、继承、实现等面向对象思想来让我们越来越大的Android项目更易开发和维护。

环境

apply plugin: 'com.android.application' //apply plugin: 'com.jakewharton.butterknife'

android { compileSdkVersion 27 defaultConfig { applicationId “top.spencer.crabscore” minSdkVersion 23 targetSdkVersion 27 versionCode 1 versionName “1.0” testInstrumentationRunner “android.support.test.runner.AndroidJUnitRunner” javaCompileOptions { annotationProcessorOptions { includeCompileClasspath true } } } buildTypes { release { minifyEnabled false proguardFiles getDefaultProguardFile(‘proguard-android.txt’), ‘proguard-rules.pro’ } } dataBinding { enabled true } }

dependencies { implementation fileTree(dir: ‘libs’, include: [’*.jar’]) implementation ‘com.android.support:appcompat-v7:27.0.2’ implementation ‘com.android.support:support-v4:27.1.1’ implementation ‘com.android.support:design:27.1.1’ implementation ‘com.android.support:recyclerview-v7:27.1.1’ implementation ‘com.android.support.constraint:constraint-layout:1.0.2’ testImplementation ‘junit:junit:4.12’ androidTestImplementation ‘com.android.support.test?1.0.1’ androidTestImplementation ‘com.android.support.test.espresso:espresso-core:3.0.1’ // https://mvnrepository.com/artifact/cn.hutool/hutool-core implementation group: ‘cn.hutool’, name: ‘hutool-core’, version: ‘4.1.18’ // https://mvnrepository.com/artifact/com.alibaba/fastjson implementation group: ‘com.alibaba’, name: ‘fastjson’, version: ‘1.2.51’ // https://mvnrepository.com/artifact/commons-codec/commons-codec implementation group: ‘commons-codec’, name: ‘commons-codec’, version: ‘1.11’ //DataBinding annotationProcessor ‘com.android.databinding:compiler:3.1.2’ //ButterKnife implementation ‘com.jakewharton:butterknife:8.8.1’ annotationProcessor ‘com.jakewharton:butterknife-compiler:8.8.1’ // https://mvnrepository.com/artifact/org.projectlombok/lombok compileOnly group: ‘org.projectlombok’, name: ‘lombok’, version: ‘1.18.2’ // https://mvnrepository.com/artifact/com.qiniu/qiniu-android-sdk implementation group: ‘com.qiniu’, name: ‘qiniu-android-sdk’, version: ‘7.3.13’ // https://mvnrepository.com/artifact/io.jsonwebtoken/jjwt implementation group: ‘io.jsonwebtoken’, name: ‘jjwt’, version: ‘0.9.1’ // https://mvnrepository.com/artifact/com.github.bumptech.glide/glide implementation group: ‘com.github.bumptech.glide’, name: ‘glide’, version: ‘4.8.0’ // https://mvnrepository.com/artifact/com.squareup.okhttp3/okhttp implementation group: ‘com.squareup.okhttp3’, name: ‘okhttp’, version: ‘3.11.0’ // https://mvnrepository.com/artifact/com.google.code.gson/gson implementation group: ‘com.google.code.gson’, name: ‘gson’, version: ‘2.8.5’ }

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别人的话

在MVP 架构中跟MVC类似的是同样也分为三层。

Activity 和Fragment 视为View层，负责处理 UI。

Presenter 为业务处理层，既能调用UI逻辑，又能请求数据，该层为纯Java类，不涉及任何Android API。

Model 层中包含着具体的数据请求，数据源。

三层之间调用顺序为view->presenter->model，为了调用安全着想不可反向调用！不可跨级调用！

那Model 层如何反馈给Presenter 层的呢？Presenter 又是如何操控View 层呢？看图！上图中说明了低层的不会直接给上一层做反馈，而是通过 View 、 Callback 为上级做出了反馈，这样就解决了请求数据与更新界面的异步操作。上图中 View 和 Callback 都是以接口的形式存在的，其中 View 是经典 MVP 架构中定义的，Callback 是我自己加的。

View 中定义了 Activity 的具体操作，主要是些将请求到的数据在界面中更新之类的。

Callback 中定义了请求数据时反馈的各种状态：成功、失败、异常等。

我的理解

我就用我自己的话来复述一下这张图吧。在MVP架构中： Activity和Fragment只负责UI初始化（组件绑定、组件适配器绑定、组件监听器绑定等等）和UI逻辑变化（这些UI变化的代码都应该是实现图中那个View的接口）； Presenter里写调用数据业务逻辑（网络请求等）和UI逻辑的代码，注意都是**“调用”，而不是具体实现**。 UI逻辑的具体实现在Activity和Fragment里面。数据业务逻辑的具体实现在Model层里面。 Model层通过CallBack将数据返回给Presenter层。 Presenter层再通过View接口把数据传给Activity和Fragment。 Activity和Fragment拿到数据以后执行相关UI逻辑。简单地总结就是：只要是和Android组件的实质性业务代码都在Activity和Fragment里，Presenter会通过View来调用。至于Android MVP升级路（二）时尚版里说的我觉得就是利用Java的反射机制的Model层的优雅实现，。

我的实现

根据以上思想和相关参考作出以下Demo。这个example

实现结果

我懒得截图了呃，代码绝对没bug，都调试过了。单击登陆会有相关MVP整个流程的调用。

总结

MVP架构的代码量很大，但方便维护和开发，大量公用的东西也可以不用写了。还在不断地学习和使用中，有了心得会继续撰文。

凑页数的源码展示

LoginActivity

package top.spencer.crabscore.activity;

import android.content.Intent; import android.os.Bundle; import android.util.Log; import android.view.View; import android.view.Window; import android.widget.; import butterknife.; import com.alibaba.fastjson.JSONObject; import top.spencer.crabscore.R; import top.spencer.crabscore.base.BaseActivity; import top.spencer.crabscore.common.CommonConstant; import top.spencer.crabscore.presenter.LoginPresenter; import top.spencer.crabscore.util.SharedPreferencesUtil; import top.spencer.crabscore.view.LoginView;

import static android.content.ContentValues.TAG;

/**

@author spencercjh */ @SuppressWarnings({“WeakerAccess”, “unused”}) public class LoginActivity extends BaseActivity implements LoginView {

private LoginPresenter loginPresenter;

@BindView(R.id.edit_username) EditText username; @BindView(R.id.edit_password) EditText password; @BindView(R.id.button_login) Button login; @BindView(R.id.button_register) Button register; @BindView(R.id.button_forget_password) Button forgetPassword; @BindView(R.id.spinner_role) Spinner roleSpinner; @BindArray(R.array.roles) String[] roles; @BindView(R.id.checkbox_remember_password) CheckBox rememberPassword; @BindView(R.id.checkbox_auto_login) CheckBox autoLogin;

private int roleChoice = 0;

@Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); supportRequestWindowFeature(Window.FEATURE_NO_TITLE); setContentView(R.layout.activity_login); ButterKnife.bind(this); loginPresenter = new LoginPresenter(); loginPresenter.attachView(this); SharedPreferencesUtil.getInstance(getContext(), “LOGIN”); initSpinner(); readSharedPreferences(); }

@Override protected void onDestroy() { super.onDestroy(); loginPresenter.detachView(); }

@Override public void initSpinner() { ArrayAdapter<String> adapter = new ArrayAdapter<>(this, android.R.layout.simple_spinner_item, roles); adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); roleSpinner.setAdapter(adapter); roleSpinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() { @Override public void onItemSelected(AdapterView<?> parent, View view, int pos, long id) { Log.d(TAG, “用户组改变”); showToast(“用户组改变”); roleChoice = pos; if (pos CommonConstant.USER_TYPE_ADMIN) { SharedPreferencesUtil.putData(CommonConstant.ADMINISTRATOR, true); } else if (pos CommonConstant.USER_TYPE_JUDGE) { SharedPreferencesUtil.putData(CommonConstant.JUDGE, true); } else if (pos CommonConstant.USER_TYPE_STAFF) { SharedPreferencesUtil.putData(CommonConstant.STAFF, true); } else if (pos CommonConstant.USER_TYPE_COMPANY) { SharedPreferencesUtil.putData(CommonConstant.COMPANY, true); } }

}

@Override public void readSharedPreferences() { //读取SharedPreferences中的用户组信息 if (SharedPreferencesUtil.getData(CommonConstant.ADMINISTRATOR, Boolean.FALSE).equals(true)) { roleSpinner.setSelection(1); roleChoice = 1; } else if (SharedPreferencesUtil.getData(CommonConstant.JUDGE, Boolean.FALSE).equals(true)) { roleSpinner.setSelection(2); roleChoice = 2; } else if (SharedPreferencesUtil.getData(CommonConstant.STAFF, Boolean.FALSE).equals(true)) { roleSpinner.setSelection(3); roleChoice = 3; } else if (SharedPreferencesUtil.getData(CommonConstant.COMPANY, Boolean.FALSE).equals(true)) { roleSpinner.setSelection(4); roleChoice = 4; } //读取上一次用户选择的用户组 try { roleChoice = (Integer) SharedPreferencesUtil.getData(“ROLE_CHOICE”, roleChoice); roleSpinner.setSelection(roleChoice); } catch (ClassCastException e) { e.printStackTrace(); } //记住密码 if (SharedPreferencesUtil.getData(CommonConstant.REMEMBER_PASSWORD, false).equals(true)) { username.setText((String) SharedPreferencesUtil.getData(“USERNAME”, “”)); password.setText((String) SharedPreferencesUtil.getData(“PASSWORD”, “”)); } //自动登录 if (SharedPreferencesUtil.getData(CommonConstant.AUTO_LOGIN, false).equals(true)) { loginPresenter.login(username.getText().toString().trim(), password.getText().toString().trim(), String.valueOf(roleChoice)); } }

@OnCheckedChanged(R.id.checkbox_remember_password) public void rememberPassword(CompoundButton buttonView, boolean isChecked) { if (isChecked) { Log.d(TAG, “记住密码已选中”); showToast(“记住密码已选中”); SharedPreferencesUtil.putData(“REMEMBER_PASSWORD”, true); } else { Log.d(TAG, “记住密码没有选中”); showToast(“记住密码没有选中”); SharedPreferencesUtil.putData(“REMEMBER_PASSWORD”, false); } }

@OnCheckedChanged(R.id.checkbox_auto_login) public void autoLogin(CompoundButton buttonView, boolean isChecked) { if (isChecked) { Log.d(TAG, “自动登录已选中”); showToast(“自动登录已选中”); SharedPreferencesUtil.putData(“AUTO_LOGIN”, true); } else { Log.d(TAG, “自动登录未选中”); showToast(“自动登录未选中”); SharedPreferencesUtil.putData(“AUTO_LOGIN”, false); } }

@OnClick(R.id.button_login) public void login(View view) { loginPresenter.login(username.getText().toString().trim(), password.getText().toString().trim(), String.valueOf(roleChoice)); }

@OnClick(R.id.button_register) public void register(View view) { Intent intent = new Intent(); //TODO 跳转注册活动 }

@OnClick(R.id.button_forget_password) public void forgetPassword(View view) { Intent intent = new Intent(); //TODO 跳转忘记密码活动 }

@Override public void showData(JSONObject successData) { Toast.makeText(getContext(), successData.getString(“message”), Toast.LENGTH_SHORT).show(); SharedPreferencesUtil.putData(“USERNAME”, username.getText().toString().trim()); SharedPreferencesUtil.putData(“PASSWORD”, password.getText().toString().trim()); Intent intent = new Intent(); //TODO 跳转主活动 }

@Override public void showFailure(JSONObject errorData) { Toast.makeText(getContext(), errorData.getString(“message”), Toast.LENGTH_SHORT).show(); } }

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activity_login.xml

后面我寻思着还是得再整个高大上的登陆界面去参赛。

<?xml version="1.0" encoding="utf-8"?> <android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:background="@color/colorPrimary" tools:context=".activity.LoginActivity"> <TextView android:id="@+id/textView2" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_gravity="center_horizontal" android:text="@string/please_login_first" android:textColor="@color/textcolor" android:textSize="30sp" app:layout_constraintStart_toStartOf="parent" app:layout_constraintEnd_toEndOf="parent" app:layout_constraintTop_toTopOf="parent" app:layout_constraintBottom_toTopOf="@+id/loginPanel" app:layout_constraintVertical_bias="0.517"/> <LinearLayout android:id="@+id/loginPanel" android:layout_width="327dp" android:layout_height="348dp" android:layout_centerHorizontal="true" android:layout_marginBottom="8sp" android:layout_marginLeft="8sp" android:layout_marginRight="8sp" android:layout_marginTop="8sp" android:background="@drawable/background_login_div" android:gravity="center" android:orientation="vertical" android:weightSum="1" app:layout_constraintBottom_toBottomOf="parent" app:layout_constraintLeft_toLeftOf="parent" app:layout_constraintRight_toRightOf="parent" app:layout_constraintTop_toTopOf="parent" app:layout_constraintVertical_bias="0.417"> <EditText android:id="@+id/edit_username" android:layout_width="match_parent" android:layout_height="50sp" android:layout_marginLeft="50sp" android:layout_marginRight="50sp" android:layout_marginTop="15sp" android:ems="10" android:hint="@string/请输入您的用户名" android:inputType="none" android:maxLines="1" android:selectAllOnFocus="false" android:textSize="17sp" android:singleLine="true" > <requestFocus/> </EditText> <EditText android:id="@+id/edit_password" android:layout_width="match_parent" android:layout_height="50sp" android:layout_marginLeft="50sp" android:layout_marginRight="50sp" android:layout_marginTop="15sp" android:ems="10" android:hint="@string/请输入您的密码" android:inputType="textPassword" android:maxLines="1" android:textSize="17sp" android:singleLine="true"> <requestFocus/> </EditText> <LinearLayout android:layout_width="match_parent" android:layout_height="100sp" android:layout_weight="0.25" android:orientation="vertical" android:weightSum="1" tools:ignore="InefficientWeight"> <RadioGroup android:layout_width="match_parent" android:layout_height="wrap_content" android:gravity="center" android:orientation="horizontal" android:weightSum="1"> <CheckBox android:id="@+id/checkbox_remember_password" android:layout_width="100sp" android:layout_height="40sp" android:text="@string/记住密码"/> <CheckBox android:id="@+id/checkbox_auto_login" android:layout_width="100sp" android:layout_height="40sp" android:text="@string/自动登录"/> </RadioGroup> <Spinner android:id="@+id/spinner_role" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_weight="0.39" android:autofillHints="sd" tools:ignore="InefficientWeight,NestedWeights" tools:targetApi="o"/> </LinearLayout> <Button android:id="@+id/button_login" android:layout_width="150sp" android:layout_height="wrap_content" android:layout_gravity="center_horizontal" android:layout_marginTop="20sp" android:background="@drawable/background_button_div" android:text="@string/登录" android:textColor="@color/white" android:textSize="20sp"/> </LinearLayout> <Button android:id="@+id/button_register" android:background="#00000000" android:layout_width="117dp" android:layout_height="25dp" android:layout_marginBottom="33dp" android:layout_marginTop="8dp" android:textColor="@color/textcolor" app:layout_constraintBottom_toBottomOf="parent" app:layout_constraintHorizontal_bias="0.106" app:layout_constraintLeft_toLeftOf="parent" app:layout_constraintRight_toRightOf="parent" app:layout_constraintTop_toTopOf="parent" app:layout_constraintVertical_bias="1.0" android:text="@string/新用户注册点我"/> <Button android:id="@+id/button_forget_password" android:background="#00000000" android:layout_width="77sp" android:layout_height="25dp" android:layout_marginBottom="33dp" android:layout_marginTop="8dp" android:textColor="@color/textcolor" app:layout_constraintBottom_toBottomOf="parent" app:layout_constraintHorizontal_bias="0.893" app:layout_constraintLeft_toLeftOf="parent" app:layout_constraintRight_toRightOf="parent" app:layout_constraintTop_toTopOf="parent" app:layout_constraintVertical_bias="1.0" android:text="@string/忘记密码"/> <android.support.constraint.Guideline android:layout_width="wrap_content" android:layout_height="wrap_content" android:id="@+id/guideline" app:layout_constraintGuide_begin="20dp" android:orientation="vertical"/>

</android.support.constraint.ConstraintLayout>

BaseActivity

package top.spencer.crabscore.base;

import android.app.ProgressDialog; import android.content.Context; import android.os.Bundle; import android.support.v7.app.AppCompatActivity; import android.widget.Toast; import top.spencer.crabscore.R;

/**

@author spencercjh */ @SuppressWarnings(“deprecation”) public abstract class BaseActivity extends AppCompatActivity implements BaseView {

private ProgressDialog mProgressDialog;

@Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); mProgressDialog = new ProgressDialog(this); mProgressDialog.setCancelable(false); }

@Override public void showLoading() { if (!mProgressDialog.isShowing()) { mProgressDialog.show(); } }

@Override public void hideLoading() { if (mProgressDialog.isShowing()) { mProgressDialog.dismiss(); } }

@Override public void showToast(String msg) { Toast.makeText(this, msg, Toast.LENGTH_SHORT).show(); }

@Override public void showErr() { showToast(getResources().getString(R.string.api_sever_error_msg)); }

@Override public Context getContext() { return BaseActivity.this; } }

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LoginView

package top.spencer.crabscore.view;

import top.spencer.crabscore.base.BaseView;

/**

@author spencercjh / public interface LoginView extends BaseView { /*

初始化用户组Spinner */ void initSpinner();

/**

读取SharedPreferences，执行相关业务逻辑 */ void readSharedPreferences(); } 12345678910111213141516171819

BaseView

package top.spencer.crabscore.base;

import android.content.Context; import com.alibaba.fastjson.JSONObject;

/**

@author spencercjh / public interface BaseView { /*

当数据请求成功后，调用此接口显示数据@param successData 成功数据源 */ void showData(JSONObject successData);

/**

显示正在加载view */ void showLoading();

/**

关闭正在加载view */ void hideLoading();

/**

显示提示@param msg Toast message */ void showToast(String msg);

/**

显示失败@param errorData 错误数据源 */ void showFailure(JSONObject errorData);

/**

显示请求错误提示 */ void showErr();

/**

获取上下文@return 上下文 */ Context getContext(); } 12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152

LoginPresenter

package top.spencer.crabscore.presenter;

import com.alibaba.fastjson.JSONObject; import top.spencer.crabscore.base.BasePresenter; import top.spencer.crabscore.data.Callback; import top.spencer.crabscore.data.constant.Token; import top.spencer.crabscore.data.model.DataModel; import top.spencer.crabscore.view.LoginView;

/**

@author spencercjh */ public class LoginPresenter extends BasePresenter<LoginView> {

/**

登陆请求

@param username 用户名

@param password 密码

@param roleId 用户组（1、2、3、4） */ public void login(String username, String password, String roleId) {

if (!isViewAttached()) { //如果没有View引用就不加载数据 return; } //显示正在加载进度条 getView().showLoading(); DataModel // 设置请求标识token .request(Token.API_LOGIN) // 添加请求参数，没有则不添加` .params(username, password, roleId) // 注册监听回调 .execute(new Callback<JSONObject>() { @Override public void onSuccess(JSONObject data) { //调用view接口显示数据，在具体的Activity中被重载 getView().showData(data); }

} }

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BasePresenter

package top.spencer.crabscore.base;

/**

@author spencercjh */ public class BasePresenter<V extends BaseView> {

/**

绑定的view */ private V mvpView;

/**

绑定view，一般在初始化中调用该方法 */ public void attachView(V view) { this.mvpView = view; }

/**

断开view，一般在onDestroy中调用 */ public void detachView() { this.mvpView = null; }

/**

是否与View建立连接每次调用业务请求的时候都要出先调用方法检查是否与View建立连接 */ public boolean isViewAttached() { return mvpView != null; }

/**

获取连接的view */ public V getView() { return mvpView; } } 1234567891011121314151617181920212223242526272829303132333435363738394041

DataModel

package top.spencer.crabscore.data.model;

import android.util.Log; import top.spencer.crabscore.base.BaseModel;

import static android.content.ContentValues.TAG;

/**

@author spencercjh */ public class DataModel { public static BaseModel request(String token) { // 声明一个空的BaseModel BaseModel model = null; try { //利用反射机制获得对应Model对象的引用 model = (BaseModel) Class.forName(token).newInstance(); } catch (ClassNotFoundException | InstantiationException | IllegalAccessException e) { e.printStackTrace(); Log.e(TAG, “Model反射错误”); } return model; } } 123456789101112131415161718192021222324

LoginModel

这里校验参数的返回错误信息写得有点呆，不太会解决了。后面要传JSONObject获取，这边只要String。我觉得哪边改其实都一样吧：都改成String以后后面就要增加转JSONObject的代码。

package top.spencer.crabscore.data.model;

import android.content.Intent; import cn.hutool.core.util.StrUtil; import com.alibaba.fastjson.JSON; import com.alibaba.fastjson.JSONObject; import org.apache.commons.codec.digest.DigestUtils; import top.spencer.crabscore.base.BaseModel; import top.spencer.crabscore.data.Callback; import top.spencer.crabscore.common.CommonConstant;

/**

调用Login接口的Model层@author spencercjh */ public class LoginModel extends BaseModel { @Override public void execute(final Callback<JSONObject> myCallBack) { if (StrUtil.isEmpty(mvpParams[0])) { String result = “{“code”:501,“message”:“用户名不能为空”,“result”:{},“success”:false,“timestamp”:0}”; JSONObject resultJson = JSON.parseObject(result); myCallBack.onFailure(resultJson); myCallBack.onComplete(); return; } else if (StrUtil.isEmpty(mvpParams[1])) { String result = “{“code”:501,“message”:“密码不能为空”,“result”:{},“success”:false,“timestamp”:0}”; JSONObject resultJson = JSON.parseObject(result); myCallBack.onFailure(resultJson); myCallBack.onComplete(); return; } else if (Integer.parseInt(mvpParams[2]) == 0) { String result = “{“code”:501,“message”:“用户组不能不选择”,“result”:{},“success”:false,“timestamp”:0}”; JSONObject resultJson = JSON.parseObject(result); myCallBack.onFailure(resultJson); myCallBack.onComplete(); return; } String url = CommonConstant.URL + “common/login” + “?username=” + mvpParams[0] + “&password=” + DigestUtils.md5Hex(mvpParams[1]) + “&roleId=” + mvpParams[2]; //login接口JWT为空，返回会拿到一个JWT，JWT是放在ResponseBody里的，再下次请求时要把JWT放进RequestHeader requestGetAPI(url, myCallBack, “”); } } 1234567891011121314151617181920212223242526272829303132333435363738394041424344454647

BaseModel

这里把REST请求都实现了。

package top.spencer.crabscore.base;

import android.support.annotation.NonNull; import android.util.Log; import com.alibaba.fastjson.JSON; import com.alibaba.fastjson.JSONObject; import okhttp3.*; import top.spencer.crabscore.common.CommonConstant; import top.spencer.crabscore.data.Callback;

import java.io.IOException; import java.util.Map;

import static android.content.ContentValues.TAG;

/**

@author spencercjh / @SuppressWarnings(“Duplicates”) public abstract class BaseModel { /*

数据请求参数 */ protected String[] mvpParams;

/**

设置数据请求参数@param args 参数数组 */ public BaseModel params(String... args) { mvpParams = args; return this; }

/**

具体的数据请求由子类实现@param myCallBack myCallBack */ public abstract void execute(Callback<JSONObject> myCallBack);

/**

OkHttp3 异步Get请求

@param url URL (需要在外面处理好)

@param myCallBack myCallBack

@param jwt Header里的JWT串 */ protected void requestGetAPI(String url, final Callback<JSONObject> myCallBack, String jwt) { OkHttpClient okHttpClient = new OkHttpClient(); Request request = new Request.Builder() .url(url) .get() .addHeader(“jwt”, jwt) .build(); okHttpClient.newCall(request).enqueue(new okhttp3.Callback() { @Override public void onFailure(@NonNull Call call, @NonNull IOException e) { Log.d(TAG, "onFailure: " + e.getMessage()); myCallBack.onError(); myCallBack.onComplete(); }

@Override public void onResponse(@NonNull Call call, @NonNull Response response) { String jwt = response.headers().get("jwt"); JSONObject responseJsonResult; try { assert response.body() != null; Log.d(TAG, response.body().string()); responseJsonResult = JSON.parseObject(response.body().string()); responseJsonResult.put("jwt", jwt); } catch (IOException | NullPointerException e) { e.printStackTrace(); myCallBack.onError(); myCallBack.onComplete(); return; } Integer code = responseJsonResult.getInteger("code"); if (code.equals(CommonConstant.SUCCESS)) { myCallBack.onSuccess(responseJsonResult); } else { myCallBack.onFailure(responseJsonResult); } myCallBack.onComplete(); }

}); }

/**

OkHttp3 Post异步方式提交表单

@param url URL

@param postParams body中的参数

@param myCallBack myCallBack

@param jwt Header里的JWT串 */ protected void requestPostAPI(String url, Map<String, Object> postParams, final Callback<JSONObject> myCallBack, String jwt) { OkHttpClient okHttpClient = new OkHttpClient(); FormBody.Builder formBody = new FormBody.Builder(); for (Map.Entry<String, Object> param : postParams.entrySet()) { formBody.add(param.getKey(), param.getValue().toString()); } RequestBody requestBody = formBody.build(); Request request = new Request.Builder() .url(url) .post(requestBody) .addHeader(“jwt”, jwt) .build(); okHttpClient.newCall(request).enqueue(new okhttp3.Callback() { @Override public void onFailure(@NonNull Call call, @NonNull IOException e) { Log.d(TAG, "onFailure: " + e.getMessage()); myCallBack.onError(); myCallBack.onComplete(); }

}); }

/**

OkHttp3 PUT异步请求

@param url URL

@param putParams body中的参数

@param myCallBack myCallBack

@param jwt Header里的JWT串 */ protected void requestPutAPI(String url, Map<String, Object> putParams, final Callback<JSONObject> myCallBack, String jwt) { OkHttpClient okHttpClient = new OkHttpClient(); FormBody.Builder formBody = new FormBody.Builder(); for (Map.Entry<String, Object> param : putParams.entrySet()) { formBody.add(param.getKey(), param.getValue().toString()); } RequestBody requestBody = formBody.build(); Request request = new Request.Builder() .url(url) .put(requestBody) .addHeader(“jwt”, jwt) .build(); okHttpClient.newCall(request).enqueue(new okhttp3.Callback() {

@Override public void onFailure(@NonNull Call call, @NonNull IOException e) { Log.d(TAG, "onFailure: " + e.getMessage()); myCallBack.onError(); myCallBack.onComplete(); } @Override public void onResponse(@NonNull Call call, @NonNull Response response) { String jwt = response.headers().get("jwt"); JSONObject responseJsonResult; try { assert response.body() != null; Log.d(TAG, response.body().string()); responseJsonResult = JSON.parseObject(response.body().string()); responseJsonResult.put("jwt", jwt); } catch (IOException | NullPointerException e) { e.printStackTrace(); myCallBack.onError(); myCallBack.onComplete(); return; } Integer code = responseJsonResult.getInteger("code"); if (code.equals(CommonConstant.SUCCESS)) { myCallBack.onSuccess(responseJsonResult); } else { myCallBack.onFailure(responseJsonResult); } myCallBack.onComplete(); }

}); }

/**

OkHttp3 Delete异步请求

@param url URL (需要在外面处理好)

@param myCallBack myCallBack

@param jwt Header里的JWT串 */ protected void requestDeleteAPI(String url, final Callback<JSONObject> myCallBack, String jwt) { OkHttpClient okHttpClient = new OkHttpClient(); Request request = new Request.Builder() .url(url) .delete() .addHeader(“jwt”, jwt) .build(); okHttpClient.newCall(request).enqueue(new okhttp3.Callback() { @Override public void onFailure(@NonNull Call call, @NonNull IOException e) { Log.d(TAG, "onFailure: " + e.getMessage()); myCallBack.onError(); myCallBack.onComplete(); }

}); } }

Callback

package top.spencer.crabscore.data;

/**

@author spencercjh */ public interface Callback<T> {

/**

数据请求成功@param data 请求到的数据 */ void onSuccess(T data);

/**

使用网络API接口请求方式时，虽然已经请求成功但是由于{@code msg}的原因无法正常返回数据。@param data 失败数据 */ void onFailure(T data);

/**

请求数据失败，指在请求网络API接口请求方式时，出现无法联网、缺少权限，内存泄露等原因导致无法连接到请求数据源。 */ void onError();

/**

当请求数据结束时，无论请求结果是成功，失败或是抛出异常都会执行此方法给用户做处理，通常做网络请求时可以在此处隐藏“正在加载”的等待控件 */ void onComplete();

}

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Token

package top.spencer.crabscore.data.constant;

import top.spencer.crabscore.data.model.LoginModel;

/**

具体Model类，常量用于反射@author spencercjh */ public class Token { public static final String API_LOGIN = LoginModel.class.getName(); } 123456789101112

SharedPreferencesUtil

这个工具类挺有用的。

package top.spencer.crabscore.util;

import android.content.Context; import android.content.SharedPreferences; import android.util.Log; import com.google.gson.*;

import java.util.*;

/**

https://blog.csdn.net/a512337862/article/details/73633420@author ZhangHao@date 2016/6/21SharedPreferences 工具类 */

@SuppressWarnings(“unused”) public class SharedPreferencesUtil {

private static SharedPreferencesUtil util; private static SharedPreferences sp; private SharedPreferencesUtil(Context context, String name) { sp = context.getSharedPreferences(name, Context.MODE_PRIVATE); } /** * 初始化SharedPreferencesUtil,只需要初始化一次，建议在Application中初始化 * * @param context 上下文对象 * @param name SharedPreferences Name */ public static void getInstance(Context context, String name) { if (util == null) { util = new SharedPreferencesUtil(context, name); } } /** * 保存数据到SharedPreferences * * @param key 键 * @param value 需要保存的数据 * @return 保存结果 */ public static boolean putData(String key, Object value) { boolean result; SharedPreferences.Editor editor = sp.edit(); String type = value.getClass().getSimpleName(); try { switch (type) { case "Boolean": editor.putBoolean(key, (Boolean) value); break; case "Long": editor.putLong(key, (Long) value); break; case "Float": editor.putFloat(key, (Float) value); break; case "String": editor.putString(key, (String) value); break; case "Integer": editor.putInt(key, (Integer) value); <sp

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Java

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Android MVP架构搭建

目录

鸣谢

摘要

开始

环境

别人的话

我的理解

我的实现

实现结果

总结

凑页数的源码展示

LoginActivity

activity_login.xml

BaseActivity

LoginView

BaseView

LoginPresenter

BasePresenter

DataModel

LoginModel

BaseModel

Callback

Token

SharedPreferencesUtil

Java