okhttp使用教程，通过okhttp将数据显示到textView上

package com.example.okhttptest; import static androidx.constraintlayout.helper.widget.MotionEffect.*; import androidx.appcompat.app.AppCompatActivity; import androidx.constraintlayout.helper.widget.MotionEffect; import android.os.Bundle; import android.util.Log; import android.view.View; import android.widget.Button; import android.widget.TextView; import java.io.IOException; import okhttp3.Call; import okhttp3.OkHttpClient; import okhttp3.Request; import okhttp3.Response; public class MainActivity extends AppCompatActivity { private TextView tv; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); Button btn=(Button) findViewById(R.id.button); tv=(TextView)findViewById(R.id.textView); btn.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { sendRequestWithOkHttp(); } private void sendRequestWithOkHttp() { new Thread(new Runnable() { @Override public void run() { try { OkHttpClient client = new OkHttpClient(); Request request = new Request.Builder() // 指定访问的服务器地址是电脑本机 .url("https://www.baidu.com") .build(); Response response = client.newCall(request).execute(); String responseData = response.body().string(); showResponse(responseData); // parseJSONWithGSON(responseData); // parseJSONWithJSONObject(responseData); // parseXMLWithSAX(responseData); // parseXMLWithPull(responseData); showResponse(responseData); } catch (Exception e) { e.printStackTrace(); } } }).start(); } }); } private void showResponse(final String response) { runOnUiThread(new Runnable() { @Override public void run() { // 在这里进行UI操作，将结果显示到界面上 tv.setText(response); } }); } }