网易云信课题实践-注册请求处理

这里写自定义目录标题

注册发生空指针异常

DefaultHttpClient httpClient = new DefaultHttpClient();
        String url = "https://api.netease.im/nimserver/user/create.action";
        HttpPost httpPost = new HttpPost(url);
        String appKey = "17c6c55a5de3cd2245baa6df790abd40";
        String appSecret = "db6e15894817";
        String nonce =  "12345";
        String curTime = String.valueOf((new Date()).getTime() / 1000L);
        String checkSum = CheckSumBuilder.getCheckSum(appSecret, nonce ,curTime);//参考 计算CheckSum的java代码

        // 设置请求的header
        httpPost.addHeader("AppKey", appKey);
        httpPost.addHeader("Nonce", nonce);
        httpPost.addHeader("CurTime", curTime);
        httpPost.addHeader("CheckSum", checkSum);
        httpPost.addHeader("Content-Type", "application/x-www-form-urlencoded;charset=utf-8");
        // 设置请求的参数
        List<NameValuePair> nvps = new ArrayList<NameValuePair>();
        nvps.add(new BasicNameValuePair("accid", "helloworld"));
        try {
            httpPost.setEntity(new UrlEncodedFormEntity(nvps, "utf-8"));
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        }
        // 执行请求
        HttpResponse response = null;
        try {
            response = httpClient.execute(httpPost);
        } catch (IOException e) {
            e.printStackTrace();
        }

        // 打印执行结果
        try {
            System.out.println(EntityUtils.toString(response.getEntity(), "utf-8"));
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

一开始一直出现空指针异常，起初我以为是因为网络问题或者是response为空，其实是在java中不能以主线程来发送请求，会导致程序卡住，要创建新的进程，处理办法如下

import android.util.Log;

import com.example.app111.CheckSumBuilder;

import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.util.EntityUtils;

import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;

public class Post1 implements Runnable{
    private Thread thread;
    private String tName;
    Post1(String tName){
        this.tName=tName;
    }
    @Override
    public void run() {
        DefaultHttpClient httpClient = new DefaultHttpClient();
        String url = "https://api.netease.im/nimserver/user/create.action";
        HttpPost httpPost = new HttpPost(url);
        String appKey = "17c6c55a5de3cd2245baa6df790abd40";
        String appSecret = "db6e15894817";
        String nonce =  "12345";
        String curTime = String.valueOf((new Date()).getTime() / 1000L);
        String checkSum = CheckSumBuilder.getCheckSum(appSecret, nonce ,curTime);//参考 计算CheckSum的java代码

        // 设置请求的header
        httpPost.addHeader("AppKey", appKey);
        httpPost.addHeader("Nonce", nonce);
        httpPost.addHeader("CurTime", curTime);
        httpPost.addHeader("CheckSum", checkSum);
        httpPost.addHeader("Content-Type", "application/x-www-form-urlencoded;charset=utf-8");
        // 设置请求的参数
        List<NameValuePair> nvps = new ArrayList<NameValuePair>();
        nvps.add(new BasicNameValuePair("accid", "helloworld"));
        try {
            httpPost.setEntity(new UrlEncodedFormEntity(nvps, "utf-8"));
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        }
        // 执行请求
        HttpResponse response = null;
        try {
            response = httpClient.execute(httpPost);
        } catch (IOException e) {
            e.printStackTrace();
        }

        // 打印执行结果
        try {
            System.out.println(EntityUtils.toString(response.getEntity(), "utf-8"));
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
    public void start(){
        if(thread==null){
            thread=new Thread(this,tName);
            thread.start();
        }
    }
}

    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_register);
        reg=findViewById(R.id.register);
        Thread thread=new Thread();
        Post1 post = new Post1("p");
        post.start();

标签：课题,网易,java,String,addHeader,云信,httpPost,import,new
来源： https://blog.csdn.net/erefas/article/details/115266146