Recicleview+OKhttp
来源：互联网 发布：淘宝店铺专营类目 编辑：程序博客网 时间：2024/06/05 18:38
首先导入依赖
compile 'com.android.support.constraint:constraint-layout:1.0.2'testCompile 'junit:junit:4.12'添加网络权限<uses-permission android:name="android.permission.INTERNET"></uses-permission>设置RecyclerView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="wrap_content" tools:context="wuhao.bwei.com.wuhao20171125.MainActivity"> <android.support.v7.widget.RecyclerView android:id="@+id/recyclerview" android:layout_width="match_parent" android:layout_height="wrap_content"> </android.support.v7.widget.RecyclerView></LinearLayout>RecyclerView中布局<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="wrap_content"> <TextView android:id="@+id/texts" android:layout_width="match_parent" android:layout_height="wrap_content" android:background="#703270" android:gravity="center" android:textSize="20sp" /></LinearLayout>
Bean类写好，有json串数据的话导入json串数据import java.util.Date;import java.util.List;/** * Created by alienware on 2017/12/5. */public class Bean { private int code; private List<Data> data; private String msg; public Bean(int code, List<Data> data, String msg) { this.code = code; this.data = data; this.msg = msg; } public int getCode() { return code; } public void setCode(int code) { this.code = code; } public List<Data> getData() { return data; } public void setData(List<Data> data) { this.data = data; } public String getMsg() { return msg; } public void setMsg(String msg) { this.msg = msg; } @Override public String toString() { return "Bean{" + "code=" + code + ", data=" + data + ", msg='" + msg + '\'' + '}'; } public class Data { private int id; private String efficacy; private String goods_img; public Data(int id, String efficacy, String goods_img) { this.id = id; this.efficacy = efficacy; this.goods_img = goods_img; } public int getId() { return id; } public void setId(int id) { this.id = id; } public String getEfficacy() { return efficacy; } public void setEfficacy(String efficacy) { this.efficacy = efficacy; } public String getGoods_img() { return goods_img; } public void setGoods_img(String goods_img) { this.goods_img = goods_img; } @Override public String toString() { return "Data{" + "id=" + id + ", efficacy='" + efficacy + '\'' + ", goods_img='" + goods_img + '\'' + '}'; } }}//配置适配器import android.content.Context;import android.support.v7.widget.RecyclerView;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import android.widget.TextView;/** * Created by alienware on 2017/12/5. */public class MyAdapter extends RecyclerView.Adapter<MyAdapter.MyHolder>{ private Context context; private Bean bean; public MyAdapter(Context context,Bean bean){ this.context = context; this.bean = bean; } @Override public MyHolder onCreateViewHolder(ViewGroup parent, int viewType) { MyHolder holder = new MyHolder(LayoutInflater.from(context).inflate(R.layout.item,parent,false)); return holder; } @Override public void onBindViewHolder(MyHolder holder, int position) { holder.texts.setText(bean.getData().get(position).getEfficacy()); } @Override public int getItemCount() { return bean.getData().size(); } class MyHolder extends RecyclerView.ViewHolder{ TextView texts; public MyHolder(View itemView) { super(itemView); texts = itemView.findViewById(R.id.texts); } }}
//写入Okhttp，太长，类直接复制即可import android.os.Handler;import android.os.Looper;import java.io.File;import java.io.FileOutputStream;import java.io.IOException;import java.io.InputStream;import java.util.HashMap;import java.util.Map;import java.util.concurrent.TimeUnit;import okhttp3.Call;import okhttp3.Callback;import okhttp3.FormBody;import okhttp3.OkHttpClient;import okhttp3.Request;import okhttp3.RequestBody;import okhttp3.Response;/** * Created by fan on 2016/11/9. */public class OkHttp { /** * 静态实例 */ private static OkHttp sOkHttpManager; /** * okhttpclient实例 */ private OkHttpClient mClient; /** * 因为我们请求数据一般都是子线程中请求，在这里我们使用了handler */ private Handler mHandler; /** * 构造方法 */ private OkHttp() { mClient = new OkHttpClient(); /** * 在这里直接设置连接超时.读取超时，写入超时 */ mClient.newBuilder().connectTimeout(10, TimeUnit.SECONDS); mClient.newBuilder().readTimeout(10, TimeUnit.SECONDS); mClient.newBuilder().writeTimeout(10, TimeUnit.SECONDS); /** * 如果是用的3.0之前的版本 使用以下直接设置连接超时.读取超时，写入超时 */ //client.setConnectTimeout(10, TimeUnit.SECONDS); //client.setWriteTimeout(10, TimeUnit.SECONDS); //client.setReadTimeout(30, TimeUnit.SECONDS); /** * 初始化handler */ mHandler = new Handler(Looper.getMainLooper()); } /** * 单例模式 获取OkHttp实例 * * @return */ public static OkHttp getInstance() { if (sOkHttpManager == null) { sOkHttpManager = new OkHttp(); } return sOkHttpManager; } //-------------------------同步的方式请求数据-------------------------- /** * 对外提供的get方法,同步的方式 * * @param url 传入的地址 * @param dataCallBack * @return */ public static Response getSync(String url, DataCallBack dataCallBack) { //通过获取到的实例来调用内部方法 return sOkHttpManager.inner_getSync(url); } /** * GET方式请求的内部逻辑处理方式，同步的方式 * * @param url * @return */ private Response inner_getSync(String url) { Request request = new Request.Builder().url(url).build(); Response response = null; try { //同步请求返回的是response对象 response = mClient.newCall(request).execute(); } catch (IOException e) { e.printStackTrace(); } return response; } /** * 对外提供的同步获取String的方法 * * @param url * @return */ public static String getSyncString(String url) { return sOkHttpManager.inner_getSyncString(url); } /** * 同步方法 */ private String inner_getSyncString(String url) { String result = null; try { /** * 把取得到的结果转为字符串，这里最好用string() */ result = inner_getSync(url).body().string(); } catch (IOException e) { e.printStackTrace(); } return result; } //-------------------------异步的方式请求数据-------------------------- public static void getAsync(String url, DataCallBack callBack) { getInstance().inner_getAsync(url, callBack); } /** * 内部逻辑请求的方法 * * @param url * @param callBack * @return */ private void inner_getAsync(String url, final DataCallBack callBack) { final Request request = new Request.Builder().url(url).build(); mClient.newCall(request).enqueue(new Callback() { @Override public void onFailure(Call call, IOException e) { deliverDataFailure(request, e, callBack); } @Override public void onResponse(Call call, Response response) throws IOException { String result = null; try { result = response.body().string(); } catch (IOException e) { deliverDataFailure(request, e, callBack); } deliverDataSuccess(result, callBack); } }); } /** * 分发失败的时候调用 * * @param request * @param e * @param callBack */ private void deliverDataFailure(final Request request, final IOException e, final DataCallBack callBack) { /** * 在这里使用异步处理 */ mHandler.post(new Runnable() { @Override public void run() { if (callBack != null) { callBack.requestFailure(request, e); } } }); } /** * 分发成功的时候调用 * * @param result * @param callBack */ private void deliverDataSuccess(final String result, final DataCallBack callBack) { /** * 在这里使用异步线程处理 */ mHandler.post(new Runnable() { @Override public void run() { if (callBack != null) { try { callBack.requestSuccess(result); } catch (Exception e) { e.printStackTrace(); } } } }); } /** * 数据回调接口 */ public interface DataCallBack { void requestFailure(Request request, IOException e); void requestSuccess(String result) throws Exception; } //-------------------------提交表单-------------------------- public static void postAsync(String url, Map<String, String> params, DataCallBack callBack) { getInstance().inner_postAsync(url, params, callBack); } private void inner_postAsync(String url, Map<String, String> params, final DataCallBack callBack) { RequestBody requestBody = null; if (params == null) { params = new HashMap<>(); } /** * 如果是3.0之前版本的，构建表单数据是下面的一句 */ //FormEncodingBuilder builder = new FormEncodingBuilder(); /** * 3.0之后版本 */ FormBody.Builder builder = new FormBody.Builder(); /** * 在这对添加的参数进行遍历，map遍历有四种方式，如果想要了解的可以网上查找 */ for (Map.Entry<String, String> map : params.entrySet()) { String key = map.getKey().toString(); String value = null; /** * 判断值是否是空的 */ if (map.getValue() == null) { value = ""; } else { value = map.getValue(); } /** * 把key和value添加到formbody中 */ builder.add(key, value); } requestBody = builder.build(); //结果返回 // 请求对象 final Request request = new Request.Builder().url(url).post(requestBody).build(); mClient.newCall(request).enqueue(new Callback() { @Override public void onFailure(Call call, IOException e) { deliverDataFailure(request, e, callBack); } @Override public void onResponse(Call call, Response response) throws IOException { String result = response.body().string(); deliverDataSuccess(result, callBack); } }); } //-------------------------文件下载-------------------------- public static void downloadAsync(String url, String desDir, DataCallBack callBack) { getInstance().inner_downloadAsync(url, desDir, callBack); } /** * 下载文件的内部逻辑处理类 * * @param url 下载地址 * @param desDir 目标地址 * @param callBack */ private void inner_downloadAsync(final String url, final String desDir, final DataCallBack callBack) { final Request request = new Request.Builder().url(url).build(); mClient.newCall(request).enqueue(new Callback() { @Override public void onFailure(Call call, IOException e) { deliverDataFailure(request, e, callBack); } @Override public void onResponse(Call call, Response response) throws IOException { /** * 在这里进行文件的下载处理 */ InputStream inputStream = null; FileOutputStream fileOutputStream = null; try { //文件名和目标地址 File file = new File(desDir, getFileName(url)); //把请求回来的response对象装换为字节流 inputStream = response.body().byteStream(); fileOutputStream = new FileOutputStream(file); int len = 0; byte[] bytes = new byte[2048]; //循环读取数据 while ((len = inputStream.read(bytes)) != -1) { fileOutputStream.write(bytes, 0, len); } //关闭文件输出流 fileOutputStream.flush(); //调用分发数据成功的方法 deliverDataSuccess(file.getAbsolutePath(), callBack); } catch (IOException e) { //如果失败，调用此方法 deliverDataFailure(request, e, callBack); e.printStackTrace(); } finally { if (inputStream != null) { inputStream.close(); } if (fileOutputStream != null) { fileOutputStream.close(); } } } }); } /** * 根据文件url获取文件的路径名字 * * @param url * @return */ private String getFileName(String url) { int separatorIndex = url.lastIndexOf("/"); String path = (separatorIndex < 0) ? url : url.substring(separatorIndex + 1, url.length()); return path; }}
//最后写入Main方法import android.support.v7.app.AppCompatActivity;import android.os.Bundle;import android.support.v7.widget.LinearLayoutManager;import android.support.v7.widget.RecyclerView;import com.google.gson.Gson;import java.io.IOException;import okhttp3.Request;public class MainActivity extends AppCompatActivity { private RecyclerView recyclerView; private Bean bean; private MyAdapter myAdapter; private String path = "http://m.yunifang.com/yunifang/mobile/goods/getall?random=39986&encode=2092d7eb33e8ea0a7a2113f2d9886c90&category_id=17"; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); setOkHttp(); } public void setRecyclerView(){ recyclerView = (RecyclerView) findViewById(R.id.recyclerview); LinearLayoutManager linearLayoutManager = new LinearLayoutManager(this); recyclerView.setLayoutManager(linearLayoutManager); myAdapter = new MyAdapter(MainActivity.this,bean); recyclerView.setAdapter(myAdapter); } public void setOkHttp(){ OkHttp.getSync(path,new OkHttp.DataCallBack(){ @Override public void requestFailure(Request request, IOException e) { } @Override public void requestSuccess(String result) throws Exception { //解析gson然后 } }); }}
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