Android 通过代理实现网络框架的切换

• 1.定义一个网络访问的接口,

public interface IHttpProcessor {

    void post(String url, Map params,ICallback callback);
}

• 2 .定义Icallback 回传结果

public interface ICallback {

    void onSuccess(String result);

    void onFailure();
}

• 3 .实现Icallback 接口 将string结果转成 穿过来要解析的对象

package com.example.amn.translucentdemo;

import com.google.gson.Gson;

import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Type;

/**
 * Created by Amn on 2019/4/19.
 */

public abstract class HttpCallback implements ICallback {
    @Override
    public void onSuccess(String result) {
        //将数据转成json对象
        Gson  gson=new Gson();
        Class clz= analysisClassInfo(this);
        Result objectResult= (Result) gson.fromJson(result,clz);
    }

    //获取 Result 对象
    private Class analysisClassInfo(Object object) {
        //可以获取包含原始类型，参数化类型，类型变量，基本类型
        Type genType=object.getClass().getGenericSuperclass();
        Type[] typeArgrument=((ParameterizedType)genType).getActualTypeArguments();

        return (Class) typeArgrument[0];

    }

    @Override
    public void onFailure() {

    }
    public abstract void onSuccess(Result objResult);
}

• 4 创建代理类HpptHelper 通过持有第三方框架的引用去实现网络访问

package com.example.amn.translucentdemo;

import java.util.Map;

/**
 * Created by Amn on 2019/4/19.
 */

public class HpptHelper implements  IHttpProcessor{

    private static HpptHelper instance;

    private HpptHelper(){

    }

    public static HpptHelper getInstance(){
        synchronized (HpptHelper.class){
            if(instance == null){
                instance=new HpptHelper();
            }
        }

        return instance;
    }

    //持有第三方访问框架
    private static IHttpProcessor mIhttpProcessor;

    public static void init(IHttpProcessor httpProcessor){
        mIhttpProcessor=httpProcessor;
    }


    @Override
    public void post(String url, Map params, ICallback callback) {

        mIhttpProcessor.post(url,params,callback);
    }
}

• 5. 第三方框架的具体实现类 实现 IHttpProcessor 如volley

package com.example.amn.translucentdemo;

import android.content.Context;

import com.android.volley.Request;
import com.android.volley.RequestQueue;
import com.android.volley.Response;
import com.android.volley.VolleyError;
import com.android.volley.toolbox.StringRequest;
import com.android.volley.toolbox.Volley;

import java.util.Map;

/**
 * Created by Amn on 2019/4/19.
 */

public class VolleyProcessor implements IHttpProcessor {

    private  static RequestQueue mQueue=null;

    public VolleyProcessor(Context context){
        mQueue= Volley.newRequestQueue(context);
    }
    @Override
    public void post(String url, Map params, final ICallback callback) {

        StringRequest stringRequest = new StringRequest(Request.Method.POST, url, new Response.Listener() {
            @Override
            public void onResponse(String response) {
                callback.onSuccess(response);
            }
        }, new Response.ErrorListener() {
            @Override
            public void onErrorResponse(VolleyError error) {
                callback.onFailure();
            }
        });

        mQueue.add(stringRequest);

    }
}

okhttp 实现

package com.example.amn.translucentdemo;

import android.os.Handler;

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

import okhttp3.Call;
import okhttp3.Callback;
import okhttp3.FormBody;
import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.RequestBody;
import okhttp3.Response;
import okhttp3.ResponseBody;

/**
 * Created by Amn on 2019/4/19.
 */

public class OkhhtpProcessor implements IHttpProcessor {

    private OkHttpClient mOkhttpClient;

    private Handler mHandler;

    public OkhhtpProcessor(){
        mOkhttpClient=new OkHttpClient();
        mHandler=new Handler();
    }

    @Override
    public void post(String url, Map params, final ICallback callback) {
        RequestBody responseBody = appendBody(params);
        final Request request=new Request.Builder().url(url).post(responseBody).build();
        mOkhttpClient.newCall(request).enqueue(new Callback() {
            @Override
            public void onFailure(Call call, IOException e) {

            }

            @Override
            public void onResponse(Call call, final Response response) throws IOException {
                if(response.isSuccessful()){
                  final String str=response.body().string();
                    mHandler.post(new Runnable() {
                        @Override
                        public void run() {
                            callback.onSuccess(str);
                        }
                    });
                }

            }
        });
    }

    private RequestBody appendBody(Map params) {
        FormBody.Builder body=new FormBody.Builder();
        if(params ==null || params.isEmpty()){
            return body.build();
        }
        for(Map.Entry entry : params.entrySet()){
            body.add(entry.getKey(),entry.getValue().toString());
        }
        return body.build();
    }
}

• 6 .使用 在application 初始化具体用哪个框架

package com.example.amn.translucentdemo;

import android.app.Application;

/**
 * Created by Amn on 2019/4/19.
 */

public class MyApplication extends Application {
    @Override
    public void onCreate() {
        super.onCreate();
//        HpptHelper.init(new VolleyProcessor(this));
        HpptHelper.init(new OkhhtpProcessor());
    }
}

• 7 . activity 调用

        HpptHelper.getInstance().post(url, params, new HttpCallback() {
            @Override
            public void onSuccess(DataInfo objResult) {

            }
        });