为AndroidStudio开发mvp插件（MvpHelper）

如果觉得写mvp有点枯燥无味，我们可以做点 cool 的事情：做个 as 插件

help.png

Google官方安卓Mvp架构demo
https://github.com/googlesamples/android-architecture

• todo-mvp: 基础的MVP架构。
• todo-mvp-loaders:基于MVP架构的实现，在获取数据的部分采用了loaders架构。
• todo-mvp-databinding: 基于MVP架构的实现，采用了数据绑定组件。
• todo-mvp-clean: 基于MVP架构的clean架构的实现。
• todo-mvp-dagger2: 基于MVP架构，采用了依赖注入dagger2。
• dev-todo-mvp-contentproviders: 基于mvp-loaders架构，使用了ContenPproviders。
• dev-todo-mvp-rxjava: 基于MVP架构，对于程序的并发处理和数据层（MVP中的Model）的抽象。

idea插件论坛
https://intellij-support.jetbrains.com/hc/en-us/community/topics/200366979-IntelliJ-IDEA-Open-API-and-Plugin-Development

因为对mvp的理解不同，会有很多种方式表达架构，所以插件要极简易读，可扩展性强，所以可以选择：

/**
     * 通过模板生成类
     * @param var1 文件生成路径
     * @param var2 文件名
     * @param var3 模板名
     * @param var4 是否生产类
     * @param var5 模板参数
     */
public abstract PsiClass createClass(@NotNull PsiDirectory var1, @NotNull String var2, @NotNull String var3, boolean var4, @NotNull Map var5) throws IncorrectOperationException;

也就是只要定制不同的模板就可以实现扩展性

直接贴下步骤：

• 1： idea File - new - Project - IntelliJ Platform Plugin
  
  

  dir.PNG
  
  plugin.xml 插件配置信息：

  com.your.company.unique.plugin.id
  Plugin display name here
  1.0
  YourCompany

  
      most HTML tags may be used
    ]]>

  
      most HTML tags may be used
    ]]>
  

  
  

  
  

  
    
  

  
    
      
      
      
    
  

action:

public class MvpGenerator extends AnAction implements MvpHandler.OnGenerateListener {

    private AnActionEvent actionEvent;
    private MvpHandler mvpHandler;
    private Map map = new HashMap<>();

    @Override
    public void actionPerformed(AnActionEvent anActionEvent) {
        this.actionEvent = anActionEvent;
        mvpHandler = new MvpHandler();
        mvpHandler.setTitle("输入名称-生成MVP相关类");
        mvpHandler.setOnGenerateListener(this);
        mvpHandler.pack();
        //设置对话框跟随当前windows窗口
        mvpHandler.setLocationRelativeTo(WindowManager.getInstance().getFrame(anActionEvent.getProject()));
        mvpHandler.setVisible(true);
    }


    @Override
    public void onGenerate(String text) {

        JavaDirectoryService directoryService = JavaDirectoryService.getInstance();

        //当前工程
        Project project = actionEvent.getProject();
        map.put("NAME", text);
        map.put("PACKAGE_NAME", Util.getPackageName(project));

        //鼠标右键所选择的路径
        IdeView ideView = actionEvent.getRequiredData(LangDataKeys.IDE_VIEW);
        PsiDirectory directory = ideView.getOrChooseDirectory();

        assert directory != null;
        if (directory.getName().contains("contract") && directory.findFile(text + "Contract.java") == null) {
            directoryService.createClass(directory, text + "Contract", "GenerateContractFile", true, map);
        }

        if (directory.getName().contains("model") && directory.findFile(text + "Model.java") == null) {
            directoryService.createClass(directory, text + "Model", "GenerateModelFile", true, map);
        }

        if (directory.getName().contains("presenter") && directory.findFile(text + "Presenter.java") == null) {
            directoryService.createClass(directory, text + "Presenter", "GeneratePresenterFile", true, map);
        }


    }

    @Override
    public void onCancel() {
        mvpHandler.setVisible(false);
    }
}

dialog: (action下，右键，new dialog)

public class MvpHandler extends JDialog {
    private JPanel contentPane;
    private JButton buttonOK;
    private JButton buttonCancel;
    private JTextArea textArea1;
    private OnGenerateListener listener;

    public void setOnGenerateListener(OnGenerateListener listener) {
        this.listener = listener;
    }

    public MvpHandler() {
        setContentPane(contentPane);
        setModal(true);
        getRootPane().setDefaultButton(buttonOK);

        buttonOK.addActionListener(e -> listener.onGenerate(textArea1.getText().trim()));

        buttonCancel.addActionListener(e -> listener.onCancel());

        // call onCancel() when cross is clicked
        setDefaultCloseOperation(DO_NOTHING_ON_CLOSE);
        addWindowListener(new WindowAdapter() {
            public void windowClosing(WindowEvent e) {
                listener.onCancel();
            }
        });

        // call onCancel() on ESCAPE
        contentPane.registerKeyboardAction(e -> listener.onCancel(), KeyStroke.getKeyStroke(KeyEvent.VK_ESCAPE, 0), JComponent.WHEN_ANCESTOR_OF_FOCUSED_COMPONENT);
    }

    public interface OnGenerateListener{
        void onGenerate(String text);
        void onCancel();
    }

}

MvpHandler.form 拖动控件

dialog.PNG

Util：

public class Util {

    /**
     * AndroidManifest.xml 获取 app 包名
     * @return
     */
    public static String getPackageName(Project project) {
        String package_name = "";
        DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
        try {
            DocumentBuilder db = dbf.newDocumentBuilder();
            Document doc = db.parse(project.getBasePath() + "/app/src/main/AndroidManifest.xml");
            NodeList nodeList = doc.getElementsByTagName("manifest");
            for (int i = 0; i < nodeList.getLength(); i++) {
                Node node = nodeList.item(i);
                Element element = (Element) node;
                package_name = element.getAttribute("package");
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
        return package_name;
    }
}

• 2： 定制模板：按需求定制
  new - file - xxx.java.ft
  GenerateContractFile.java.ft

#if (${PACKAGE_NAME} && ${PACKAGE_NAME} != "")
package ${PACKAGE_NAME};
#end

import base.IBaseModel;
import base.IBaseView;
import base.IPresenter;


public interface ${NAME}Contract{

    interface I${NAME}View extends IBaseView{

    }

    interface I${NAME}Model extends IBaseModel{

    }

    interface I${NAME}Presenter extends IPresenter{

    }

}

GenerateModelFile.java.ft

#if (${PACKAGE_NAME} && ${PACKAGE_NAME} != "")package ${PACKAGE_NAME};#end

import ${PACKAGE_NAME}.contract.${NAME}Contract;

import base.IBaseModel;


public class ${NAME}Model implements ${NAME}Contract.I${NAME}Model{

    public static IBaseModel newInstance(){
        return new ${NAME}Model();
    }


}

GeneratePresenterFile.java.ft

#if (${PACKAGE_NAME} && ${PACKAGE_NAME} != "")
package ${PACKAGE_NAME}
;#end

import ${PACKAGE_NAME}.contract.${NAME}Contract;
import ${PACKAGE_NAME}.model.${NAME}Model;

import base.BasePresenter;


public class ${NAME}Presenter extends BasePresenter<${NAME}Contract.I${NAME}View,${NAME}Contract.I${NAME}Model> implements ${NAME}Contract.I${NAME}Presenter{

    @Override
    public ${NAME}Contract.I${NAME}Model bindModel(){
        return (${NAME}Contract.I${NAME}Model)${NAME}Model.newInstance();
    }


}

MVP:
BasePresenter:

public abstract class BasePresenter implements IPresenter {


    protected T mView;
    protected M mModel;

    protected CompositeDisposable mDisposable;

    public BasePresenter() {
        this.mModel = bindModel();
        mDisposable = new CompositeDisposable();
    }

    public boolean isViewAttached() {
        return mView != null;
    }


    public void checkViewAttached() {
        if (!isViewAttached()) throw new RuntimeException("未注册View");
    }

    @Override
    public void onAttach(T t) {
        mView = t;
        if (mModel == null) {
            throw new NullPointerException("model没有绑定 不能使用");
        }
    }

    /**
     * return Model
     */
    public abstract M bindModel();

    @Override
    public void onDetach() {
        if (!mDisposable.isDisposed())
            mDisposable.dispose();
        mView = null;
    }


}

IBaseModel：

package base;

/**
 * Created by haoran on 2018/4/4.
 */

public interface IBaseModel {
}

IBaseView ：

package base;

/**
 * Created by haoran on 2017/10/30.
 */

public interface IBaseView {


    void showLoading();

    void hideLoading();

    void onError(String message);

}

IPresenter：

package base;

/**
 * Created by haoran on 2017/10/30.
 */

public interface IPresenter {

    void onAttach(T t);

    void onDetach();
    
}

实现类：（引导页为例）... import 忽略
GuideContract：

public interface GuideContract {
    interface IGuideView extends IBaseView{

        void showGuideImages(List pictureListBeans);

        void showGuideDefaultImage();
    }

    interface IGuideModel extends IBaseModel {
        Observable> getGuideImages();
    }

    interface IGuidePresenter extends IPresenter {

        void getGuideImages();

    }

}

GuideModel：

public class GuideModel implements GuideContract.IGuideModel {


    public static IBaseModel newInstance() {
        return new GuideModel();
    }

    public Observable> getGuideImages() {
        return ApiHelper.get().getGuideImages(new JSONObject());
    }
}

GuidePresenter：

public class GuidePresenter extends BasePresenter implements GuideContract.IGuidePresenter {


    @Override
    public void getGuideImages() {
        checkViewAttached();
        mDisposable.add(mModel.getGuideImages().subscribe(pictureList -> {
            if (pictureList == null || pictureList.size() == 0) {
                mView.showGuideDefaultImage();
            } else {
                mView.showGuideImages(pictureList);
            }
        }, throwable -> mView.showGuideDefaultImage()));
    }

    @Override
    public GuideContract.IGuideModel bindModel() {
        return (GuideContract.IGuideModel) GuideModel.newInstance();
    }
}

根据自己实际的mvp实现类定制模板

• 3： 打包插件，as引入插件，使用插件（插件开发调试忽略）
  打包：idea里 build - Prapare Pulgine Module 'xxx' for Developer
  项目目录下的jar包
  打开as -- setting pulgine import from disk : jar 包目录
  重启as
  选中目录(含contract ， model ，presenter) alt + i（快捷键可在plugine.xml配置）
  或 右键 - new - 点击插件图标
  输入 名称（XXX）--- 生成 java 类
  
  

  generate1.PNG
  
  点击ok
  
  

  generate2.PNG

感谢：）