Android OkHttp基本用法

水深无声 2022-06-09 01:40 237阅读 0赞

引用:

compile 'com.squareup.okhttp3:okhttp:3.8.1'
        compile 'com.squareup.okio:okio:1.13.0'

Android Activity:

package com.example.okhttpdemo;
    
    import android.os.Bundle;
    import android.os.Environment;
    import android.support.v7.app.AppCompatActivity;
    import android.util.Log;
    import android.view.View;
    
    import java.io.File;
    import java.io.FileOutputStream;
    import java.io.IOException;
    import java.io.InputStream;
    
    import okhttp3.FormBody;
    import okhttp3.MediaType;
    import okhttp3.OkHttpClient;
    import okhttp3.Request;
    import okhttp3.RequestBody;
    import okhttp3.Response;
    
    public class MainActivity extends AppCompatActivity {
        
    
        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_main);
        }
    
        OkHttpClient client = new OkHttpClient();
    
        /**
         * get请求
         * @param view
         */
        public void httpGet(View view) {
            new Thread() {
                @Override
                public void run() {
                    String result = "";
    
                    Request request = new Request.Builder()
                            .url("http://192.168.3.177:8080/Test/Test?action=getMessage")
                            .build();
    
                    try {
                        Response response = client.newCall(request).execute();
                        result = response.body().string();
                    } catch (IOException e) {
                        e.printStackTrace();
                    }
                    d(result);
    
                }
            }.start();
    
        }
    
        /**
         * post请求
         * @param view
         */
        public void httpPost(View view) {
            new Thread() {
                @Override
                public void run() {
                    String result = "";
    
                    RequestBody body = new FormBody.Builder()
                            .add("action", "getMessage")
                            .build();
    
                    Request request = new Request.Builder()
                            .url("http://192.168.3.177:8080/Test/Test")
                            .post(body)
                            .build();
                    try {
                        Response response = client.newCall(request).execute();
                        result = response.body().string();
                    } catch (IOException e) {
                        e.printStackTrace();
                        d(e.toString());
                    }
                    d(result);
                }
            }.start();
    
        }
    
        /**
         * 下载文件
         * @param view
         */
        public void downloadFile(View view) {
            new Thread() {
                @Override
                public void run() {
    
                    String url = "https://www.baidu.com/img/bd_logo1.png";
                    Request request = new Request.Builder().url(url).build();
                    try {
                        Response response = client.newCall(request).execute();
                        InputStream inputStream = response.body().byteStream();
                        String path = Environment.getExternalStorageDirectory().getPath() + "/baidu.png";
    
                        FileOutputStream fileOutputStream = new FileOutputStream(new File(path));
                        byte[] bs = new byte[1024];
                        int l = 0;
                        while ((l = inputStream.read(bs)) != -1) {
                            fileOutputStream.write(bs, 0, l);
                        }
    
                        fileOutputStream.flush();
                        fileOutputStream.close();
                        inputStream.close();
    
                    } catch (IOException e) {
                        e.printStackTrace();
                    }
    
                }
            }.start();
    
        }
    
        /**
         * 上传文件
         * @param view
         */
        public void uploadFile(View view) {
            new Thread() {
                @Override
                public void run() {
                    String url = "http://192.168.3.177:8080/Test/Test?action=uploadFile&fileName=";
    
                    String path = Environment.getExternalStorageDirectory().getPath() + "/baidu.png";
                    final File file = new File(path);
                    if(!file.exists()){
                        return;
                    }
                    url+=file.getName();
    
                    RequestBody requestBody =RequestBody.create(MediaType.parse("application/octet-stream"),file);
    
                    Request request = new Request.Builder()
                            .url(url)
                            .post(requestBody)
                            .build();
    
                    try {
                        Response result = client.newCall(request).execute();
                        int resultCode = result.code();
                        d(String.valueOf(resultCode));
                    } catch (IOException e) {
                        e.printStackTrace();
                    }
                }
            }.start();
        }
    
        public void d(String string) {
            Log.d("Ex", string);
        }
    
    
    }

上传的文件为了省事直接用的就是下载文件时所下载的文件

Java服务器Servlet接口代码:

package code.servlet;
    
    import java.io.File;
    import java.io.FileOutputStream;
    import java.io.IOException;
    import java.io.InputStream;
    import java.io.PrintWriter;
    
    import javax.servlet.ServletException;
    import javax.servlet.http.HttpServlet;
    import javax.servlet.http.HttpServletRequest;
    import javax.servlet.http.HttpServletResponse;
    
    public class TestServlet extends HttpServlet {
        
    
        /**
         * 
         */
        private static final long serialVersionUID = 4593404916826953969L;
    
        @Override
        protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
            doPost(req, resp);
        }
    
        @Override
        protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
            req.setCharacterEncoding("UTF-8");
            resp.setContentType("text/html; charset=UTF-8");
            PrintWriter out = resp.getWriter();
    
            String action = req.getParameter("action");
            if (action == null) {
                action = "";
            }
    
            /**
             * 获取信息
             */
            if (action.equalsIgnoreCase("getMessage")) {
                out.println("举头忽见衡阳雁。千声万字情何限。" + "叵而薄情夫。一行书也无。 " + "泣归香阁恨。和泪掩红粉。" + "待雁却回时。也无书寄伊。");
            }
    
            /**
             * 上传数据
             */
            if (action.equalsIgnoreCase("uploadFile")) {
    
                String fileName=req.getParameter("fileName");
    
                try {
                    InputStream inputStream = req.getInputStream();
                    File file = new File("D:\\"+fileName);
                    if (!file.exists()) {
                        file.createNewFile();
                    }
                    FileOutputStream fileOutputStream = new FileOutputStream(file);
                    byte[] bs = new byte[1024];
                    int l = 0;
                    while ((l = inputStream.read(bs)) != -1) {
                        fileOutputStream.write(bs, 0, l);
                    }
                    fileOutputStream.flush();
                    fileOutputStream.close();
                    inputStream.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
    
            out.flush();
            out.close();
        }
    
    }

之前写Android进行网络请求一开始学习的时候用的是Android自带的api,之后来到我的第一家公司也比较自由,并没有限制网络访问所用的框架什么的,所以学习了NoHttp的使用,现在想的是OkHttp毕竟使用的公司很多,所以就花点时间简单的研究下,记录下,以后如果用到不会太麻烦的从头开始,也没有太深入

关于Android网络请求和文件操作的权限自行添加