[移动开发]Android BaseMvp 的使用

BaseMvp 的简单封装

上一篇介绍了BaseMvp 的封装，这一篇来简单的介绍一下具体的使用方法。

一、BaseActivity 的使用，请忽略类名，这里我后期会写一个简单的dome，就用login 类名做了代替。**

1、先创建一个契约接口，在这里，我们提供M、V、P 层中的接口方法

package com.traveleasy.electricity.contract;

import com.traveleasy.electricity.Base.IBasePresenter;
import com.traveleasy.electricity.Base.IBaseView;

import okhttp3.Callback;

/**
 * 契约接口，可以直观的看到M,V,P 层接口中提供的方法
 */
public interface LoginContract {

    interface LoginMadel{
        void requestBaidu(Callback callback);
    }

    interface LoginView extends IBaseView{

        void showDialog();
        void succes(String content);
    }

    interface LoginPresenter extends IBasePresenter{
        void handlerData();
    }

}

2、新建model 层，实现数据的请求获取

package com.traveleasy.electricity.model;

import com.traveleasy.electricity.Base.BaseModel;
import com.traveleasy.electricity.contract.LoginContract;

import okhttp3.Callback;
import okhttp3.OkHttpClient;
import okhttp3.Request;

/**
 * model 层，请求网络或数据库，提供数据源（原始数据）
 */
public class LoginModel extends BaseModel implements LoginContract.LoginMadel {


    @Override
    public void requestBaidu(Callback callback) {

        OkHttpClient client = new OkHttpClient();
        Request request = new Request.Builder()
                .url("https://www.baidu.com/")
                .build();

        client.newCall(request).enqueue(callback);

    }
}

3、实现Presenter 层，承担业务逻辑处理，数据的处理等

package com.traveleasy.electricity.presenter;

import android.util.Log;

import com.traveleasy.electricity.Base.BasePresenter;
import com.traveleasy.electricity.Base.IBaseView;
import com.traveleasy.electricity.contract.LoginContract;
import com.traveleasy.electricity.model.LoginModel;

import java.io.IOException;

import okhttp3.Call;
import okhttp3.Callback;
import okhttp3.Response;

/**
 * presenter 层，承担业务逻辑处理，数据的处理等
 */
public class LoginPresenter extends BasePresenter<LoginContract.LoginView, LoginModel> implements LoginContract.LoginPresenter {

    @Override
    public void handlerData() {

        getView().showDialog();

        /**
         * 发起请求，获取回调函数
         */
        getModel().requestBaidu(new Callback() {
            @Override
            public void onFailure(Call call, IOException e) {

            }

            @Override
            public void onResponse(Call call, Response response) throws IOException {
                String content = response.body().string();
                if (getView() != null) {
                    getView().succes(content);
                }
            }
        });
    }


    @Override
    public void detechView() {
        super.detechView();
        /**
         * 释放内存，关闭网络请求，关闭线程等操作
         */
        Log.d("=======", "detechView: 解除绑定，释放内存");
    }
}

4、View 视图层，这里我们处理页面的UI 部分

package com.traveleasy.electricity;

import androidx.annotation.Nullable;
import androidx.appcompat.app.AppCompatActivity;

import android.app.ProgressDialog;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.os.Handler;
import android.view.View;
import android.widget.TextView;
import android.widget.Toast;

import com.traveleasy.electricity.Base.BaseActivity;
import com.traveleasy.electricity.Base.BasePresenter;
import com.traveleasy.electricity.contract.LoginContract;
import com.traveleasy.electricity.inject.InjectPresenter;
import com.traveleasy.electricity.presenter.LoginPresenter;

public class MainActivity extends BaseActivity implements LoginContract.LoginView {


    private TextView tv;

//    依赖注入，解决多个 Presenter 的问题
    @InjectPresenter
    private LoginPresenter mPresenter;

    @Override
    protected void initLayout(@Nullable Bundle savedInstanceState) {
        setContentView(R.layout.activity_main);
    }


    public void checkName(View view){
        Intent intent = new Intent(this, SecondActivity.class);
        startActivity(intent);
    }


    @Override
    protected void initViews() {
        tv = $(R.id.tv);
    }

    @Override
    protected void initData() {
        mPresenter.handlerData();
    }


    @Override
    public void showDialog() {
        ProgressDialog dialog = new ProgressDialog(getContext());
        dialog.show();
        new Handler().postDelayed(new Runnable() {
            @Override
            public void run() {
                dialog.dismiss();
            }
        }, 1500);
    }

    @Override
    public void succes(String content) {
        runOnUiThread(new Runnable() {
            @Override
            public void run() {
                Toast.makeText(MainActivity.this, "" + content, Toast.LENGTH_SHORT).show();

                tv.setText(content);
            }
        });
    }

}

二、BaseFragment 的使用其实和activity的差不多，就不一一介绍了，直接看代码

package com.traveleasy.electricity.contract;

import com.traveleasy.electricity.Base.IBasePresenter;
import com.traveleasy.electricity.Base.IBaseView;

import okhttp3.Callback;


public interface SecondContract {

     interface SecondModel {
         void requestBaidu(Callback callback);
    }

     interface SecondView extends IBaseView {
         void showDialog();
         void succes(String context);
    }

    interface SecondPresenter extends IBasePresenter {
         void handleData();
    }

}

package com.traveleasy.electricity.model;

import com.traveleasy.electricity.Base.BaseModel;
import com.traveleasy.electricity.contract.SecondContract;

import okhttp3.Callback;
import okhttp3.OkHttpClient;
import okhttp3.Request;

public class SeconModel extends BaseModel implements SecondContract.SecondModel {

    @Override
    public void requestBaidu(Callback callback) {
        OkHttpClient client = new OkHttpClient();
        Request request = new Request.Builder()
                .url("https://www.baidu.com/")
                .build();
        client.newCall(request).enqueue(callback);
    }
}

package com.traveleasy.electricity.presenter;

import com.traveleasy.electricity.Base.BasePresenter;
import com.traveleasy.electricity.contract.SecondContract;
import com.traveleasy.electricity.model.SeconModel;

import java.io.IOException;

import okhttp3.Call;
import okhttp3.Callback;
import okhttp3.Response;

public class SecondPresenter extends BasePresenter<SecondContract.SecondView, SeconModel> implements SecondContract.SecondPresenter {

    @Override
    public void handleData() {
        getView().showDialog();
        getModel().requestBaidu(new Callback() {
            @Override
            public void onFailure(Call call, IOException e) {

            }

            @Override
            public void onResponse(Call call, Response response) throws IOException {
                String context = response.body().string();
                getView().succes(context);
            }
        });
    }
}

这里新建了一个activity，没有继承base，就是一个fragment 的调用

package com.traveleasy.electricity;

import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;

public class SecondActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_second);

        /**
         * 开启一个fragment
         */

        getSupportFragmentManager().beginTransaction().replace(R.id.second_container, new SecondFragment()).commit();
    }
}

package com.traveleasy.electricity;


import android.os.Bundle;
import android.widget.TextView;
import android.widget.Toast;

import androidx.annotation.Nullable;

import com.traveleasy.electricity.Base.BaseFragment;
import com.traveleasy.electricity.contract.SecondContract;
import com.traveleasy.electricity.inject.InjectPresenter;
import com.traveleasy.electricity.presenter.SecondPresenter;



public class SecondFragment extends BaseFragment implements SecondContract.SecondView {

    private TextView tvFragment;

    @InjectPresenter
    private SecondPresenter mPresenter;

    @Override
    protected int setLayout() {
        return R.layout.fragment_second;
    }

    @Override
    protected void initViews(@Nullable Bundle savedInstanceState) {
        tvFragment = $(R.id.tv_fragment);
    }

    @Override
    protected void initData() {
        mPresenter.handleData();
    }

    @Override
    public void showDialog() {

    }

    @SuppressWarnings("ConstantConditions")
    @Override
    public void succes(String context) {
        getActivity().runOnUiThread(new Runnable() {
            @Override
            public void run() {
                Toast.makeText(getContext(), "" + context, Toast.LENGTH_SHORT).show();
                tvFragment.setText(context);
            }
        });
    }
}