实战MVP请求数据OKHttp封装RecyclerView上拉刷新下拉加载

最新推荐文章于 2019-10-18 16:10:26 发布

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最新推荐文章于 2019-10-18 16:10:26 发布

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CC 4.0 BY-SA版权

本文链接：https://blog.youkuaiyun.com/qq_40531469/article/details/78769021

本文介绍了一个简单的安卓应用中搜索功能的实现过程，包括UI布局设计、数据获取及展示等关键步骤。通过Presenter模式分离视图与数据处理，利用RecyclerView进行商品列表的展示。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

//布局

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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:orientation="vertical"
tools:context="com.bwie.week2_demo.MainActivity">

<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">

<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="搜索商品"
android:textSize="30sp"
android:layout_marginLeft="130dp"
android:layout_marginTop="10dp"
/>

<ImageView
android:id="@+id/img1"
android:layout_width="40dp"
android:layout_height="40dp"
android:src="@drawable/grid_icon"
android:layout_marginLeft="80dp"
android:layout_marginBottom="10dp"
android:layout_marginTop="5dp"/>

</LinearLayout>

<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">

<EditText
android:id="@+id/et_name1"
android:layout_width="240dp"
android:layout_height="wrap_content"
android:hint="请输入关键字"
android:layout_marginLeft="25dp"
android:layout_marginTop="10dp"/>

<Button
android:id="@+id/btn1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="搜索"
android:layout_marginTop="10dp"
android:layout_marginLeft="15dp"
android:layout_marginBottom="10dp"/>

</LinearLayout>

<android.support.v7.widget.RecyclerView
android:id="@+id/recyclerview1"
android:layout_width="match_parent"
android:layout_height="match_parent"></android.support.v7.widget.RecyclerView>

</LinearLayout>

//presenter

package com.bwie.week2_demo.Presenter;

import android.content.Context;

import com.bwie.week2_demo.Bean.Bean;
import com.bwie.week2_demo.Model.MyModel;
import com.bwie.week2_demo.View.Iview;
import com.bwie.week2_demo.utils.OnUiCallback;
import com.google.gson.Gson;

import java.io.IOException;

import okhttp3.Call;

/**
* Created by 小醜 on 2017/12/9.
*/

public class Presenter {
Context context; Iview iView;
MyModel myModel;
public Presenter(Context context, Iview iView) {
this.context=context;
this.iView=iView;
this.myModel=new MyModel();

}
public void get(){
myModel.initData(new OnUiCallback() {
@Override
public void onFailed(Call call, IOException e) {

}

@Override
public void onSuccess(String result)
{
Gson gson=new Gson();
Bean bean= gson.fromJson(result, Bean.class);
iView.getData(bean);
}
});
}
}

//utils包 ok封装导进

//view包 Iview类

package com.bwie.week2_demo.View;

import com.bwie.week2_demo.Bean.Bean;

/**
* Created by 小醜 on 2017/12/9.
*/

public interface Iview {
public void getData(Bean bean);
}

//model包

// Imodel类

package com.bwie.week2_demo.Model;

import okhttp3.Callback;

/**
* Created by 小醜 on 2017/12/9.
*/

public interface IModel {

public void initData(Callback callback);
}

//MyModel

package com.bwie.week2_demo.Model;

import com.bwie.week2_demo.utils.OkHttp3Utils;

import okhttp3.Callback;

/**
* Created by 小醜 on 2017/12/9.
*/

public class MyModel implements IModel {
@Override
public void initData(Callback callback) {
OkHttp3Utils.doGet("http://120.27.23.105/product/searchProducts?source=android&keywords=笔记本&page=1",callback);
}
}

//bean 类封装

//MainActivity类

package com.bwie.week2_demo;

import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.v7.widget.RecyclerView;
import android.view.View;
import android.widget.ImageView;

import com.bwie.week2_demo.Bean.Bean;
import com.bwie.week2_demo.Presenter.Presenter;
import com.bwie.week2_demo.View.Iview;

import java.util.List;

public class MainActivity extends AppCompatActivity implements Iview{

ImageView img1;
RecyclerView recyclerview;

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

recyclerview= (RecyclerView) findViewById(R.id.recyclerview1);
isitJump();
Presenter presenter=new Presenter(this,this);
presenter.get();

}

private void isitJump() {
img1 = (ImageView) findViewById(R.id.img1);
img1.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Intent intent = new Intent(MainActivity.this,Main2Activity.class);
startActivity(intent);
}
});
}

@Override
public void getData(Bean bean) {
List<Bean.DataBean> list=bean.getData();
MyAdapter myAdapter=new MyAdapter(this,list);
recyclerview.setAdapter(myAdapter);
}
}

//MyAdapter 类

package com.bwie.week2_demo;

import android.content.Context;
import android.support.v7.widget.RecyclerView;
import android.view.View;
import android.view.ViewGroup;
import android.widget.EditText;
import android.widget.ImageView;

import com.bwie.week2_demo.Bean.Bean;

import java.util.List;

/**
* Created by 小醜 on 2017/12/9.
*/

public class MyAdapter extends RecyclerView.Adapter<MyAdapter.ViewHolder> {
Context context; List<Bean.DataBean> list;
public MyAdapter(Context context, List<Bean.DataBean> list) {
this.context=context;
this.list=list;

}

@Override
public MyAdapter.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {

return null;
}

@Override
public void onBindViewHolder(MyAdapter.ViewHolder holder, int position) {

}

@Override
public int getItemCount() {
return list==null?0:list.size();
}

public class ViewHolder extends RecyclerView.ViewHolder {
ImageView img1;
EditText et_name1;
public ViewHolder(View itemView) {
super(itemView);
img1 = itemView.findViewById(R.id.img1);
et_name1 = itemView.findViewById(R.id.et_name1);

}
}
}