简易MVP实现

M层获取数据json

public class Model implements ModelInf {
    @Override
    public void getDate(final Handler handler) {
        OkHttpClient okHttpClient = OkHttpUtil.getInstance();
        Request request = new Request.Builder().url("http://172.16.45.43:8080/first_page.json").build();
                okHttpClient.newCall(request).enqueue(new Callback() {
                    @Override
                    public void onFailure(Call call, IOException e) {
                    }
                    @Override
                    public void onResponse(Call call, Response response) throws IOException {
                        String string = response.body().string();
                handler.obtainMessage(100,string).sendToTarget();
            }
        });
    }
}

M接口提供别人调用ide

public interface ModelInf {
    public void getDate(Handler handler);
}

V获取数据 来更新UI（数据类型能够多种类型）ui

public interface ViewInf {
    public void upDate(List<Bean.ResultBean.DataBean> list);
}

P层链接M.V桥梁this

public interface PresenterInf {
    public void ViewToModel();
}

public class Presenter implements PresenterInf {
    //建立M.V层对象
    private ModelInf modelInf;
    private ViewInf viewInf;
    public Presenter(MainActivity activity) {
        this.modelInf = new Model();
        this.viewInf = activity;
    }
    @Override
    public void ViewToModel() {
        //获取M层传递数据
        modelInf.getDate(handler);
    }
    Handler handler = new Handler(){
        @Override
        public void handleMessage(Message msg) {
            super.handleMessage(msg);
            String s = (String) msg.obj;
            Gson gson = new Gson();

            Bean bean = gson.fromJson(s, Bean.class);
            List<Bean.ResultBean.DataBean> data = bean.getResult().getData();
            //传递给V层
            viewInf.upDate(data);
        }
    };
}

实现V层接口实现方法拿到数据url

MainActivity implements ViewInf对象