Android(安卓)之Http
16lz
2021-01-26
一、简介
二、WebView
public class MainActivity extends AppCompatActivity { private EditText et_url; private Button btn_join; private WebView wv_web; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); et_url = (EditText) findViewById(R.id.et_url); btn_join = (Button) findViewById(R.id.btn_join); wv_web = (WebView) findViewById(R.id.wv_web); //支持js wv_web.getSettings().setJavaScriptEnabled(true); // 当跳转到新的网页时，仍然在这个WebView中显示 wv_web.setWebViewClient(new WebViewClient()); wv_web.loadUrl("http://www.baidu.com"); btn_join.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { String urlStr = et_url.getText().toString(); wv_web.loadUrl(urlStr); } }); }}PS：感觉比ios的WebView好使
三、使用HTTP协议访问网络
3.1 HttpURLConnection
package com.example.jony.httpdemo;import android.support.v7.app.AppCompatActivity;import android.os.Bundle;import android.util.Log;import android.view.View;import android.widget.Button;import android.widget.EditText;import android.widget.TextView;import java.io.BufferedReader;import java.io.DataOutputStream;import java.io.IOException;import java.io.InputStream;import java.io.InputStreamReader;import java.net.HttpURLConnection;import java.net.URL;public class URLConActivity extends AppCompatActivity { private static final String TAG = "URLConActivity"; private EditText et_url_url; private Button btn_url_request; private TextView response_url_text; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_urlcon); et_url_url = (EditText) findViewById(R.id.et_url_url); response_url_text = (TextView) findViewById(R.id.response_url_text); btn_url_request = (Button) findViewById(R.id.btn_url_request); btn_url_request.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { sendRequestWithHttpURLConnection(); } }); } private void sendRequestWithHttpURLConnection(){ //子线程中进行网络数据请求 new Thread(new Runnable() { @Override public void run() { //创建连接对象 HttpURLConnection connection = null; BufferedReader reader = null; try { URL url = new URL(et_url_url.getText().toString()); connection = (HttpURLConnection) url.openConnection(); //get方法 connection.setRequestMethod("GET"); //post方法// connection.setRequestMethod("POST");// DataOutputStream out = new DataOutputStream(connection.getOutputStream());// out.writeBytes("userName=admin&password=123456"); //连接超时和读取超时单位毫秒 connection.setConnectTimeout(8000); connection.setReadTimeout(8000); InputStream in = connection.getInputStream(); reader = new BufferedReader(new InputStreamReader(in)); StringBuilder response = new StringBuilder(); String line; while ((line = reader.readLine()) != null){ response.append(line); } showResponse(response.toString()); } catch (Exception e) { e.printStackTrace(); } finally { if (reader != null){ try { reader.close(); } catch (IOException e) { e.printStackTrace(); } } if (connection != null){ connection.disconnect(); } } } }).start(); } private void showResponse(final String response){ //将线程切换到主线程更新UI runOnUiThread(new Runnable() { @Override public void run() {// Log.d(TAG, "run:"+response); response_url_text.setText(response); } }); }}3.2 OKHttp
package com.example.jony.httpdemo;import android.support.v7.app.AppCompatActivity;import android.os.Bundle;import android.view.View;import android.widget.Button;import android.widget.EditText;import android.widget.TextView;import java.io.IOException;import okhttp3.FormBody;import okhttp3.OkHttpClient;import okhttp3.Request;import okhttp3.RequestBody;import okhttp3.Response;public class OKHttpActivity extends AppCompatActivity { private EditText et_ok_url; private Button btn_ok_request; private TextView response_ok_text; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_okhttp); et_ok_url = (EditText) findViewById(R.id.et_ok_url); btn_ok_request = (Button) findViewById(R.id.btn_ok_request); response_ok_text = (TextView) findViewById(R.id.response_ok_text); btn_ok_request.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { sendRequestWithOKHttp(); } }); } private void sendRequestWithOKHttp(){ new Thread(new Runnable() { @Override public void run() { OkHttpClient client = new OkHttpClient(); // //Post请求// RequestBody requestBody = new FormBody.Builder()// .add("username","admin")// .add("password", "123456")// .build();// Request request = new Request().Builder()// .url("http://www.baidu.com")// .post(requestBody)// .build(); Request request = new Request.Builder().url(et_ok_url.getText().toString()).build(); try { //创建call对象，并execute()方法发送请求获取返回数据 Response response = client.newCall(request).execute(); String responseData = response.body().string(); showResponse(responseData); } catch (IOException e) { e.printStackTrace(); } } }).start(); } private void showResponse(final String response){ runOnUiThread(new Runnable() { @Override public void run() { response_ok_text.setText(response); } }); }}更多相关文章
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