Android 发送http请求

get方式提交参数 import java.io.IOException; import java.io.InputStream; import java.net.HttpURLConnection; import java.net.MalformedURLException; import java.net.URL; import java.net.URLConnection; import android.os.Bundle; import android.app.Activity; import android.view.Menu; import android.view.View; import android.widget.Button; import android.widget.EditText; import android.widget.Toast; public class MainActivity extends Activity { // 设置一个路径 private String path = "http://10.0.2.2:8080/day10_login/loginServit"; private EditText et_username; private EditText et_password; // Button bt_login; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); et_username = (EditText) findViewById(R.id.et_password); et_password = (EditText) findViewById(R.id.et_username); //bt_login = (Button) findViewById(R.id.bt_login); } public void login(View v) { new Thread() { public void run() { // 获取输入的账号和密码 String username = et_username.getText().toString().trim(); String password = et_password.getText().toString().trim(); String address = path + "?username=" + username + "&password=" + password; try { URL uri = new URL(address); HttpURLConnection openConnection = (HttpURLConnection) uri .openConnection(); // 设置请求方式 openConnection.setRequestMethod("GET"); // 设置请求超时的是金 openConnection.setConnectTimeout(10000); // 获取响应吗 int code = openConnection.getResponseCode(); // 判断响应吗状态 if (code == 200) { // 获取输入流 InputStream inputStream = openConnection .getInputStream(); // 将读取的东西转换为字符串 String result = Utils.getString(inputStream); showToast(result); } } catch (Exception e) { // TODO Auto-generated catch block e.printStackTrace(); } }; }.start(); } public void showToast(final String result) { runOnUiThread(new Runnable() { @Override public void run() { Toast.makeText(getApplicationContext(), result, Toast.LENGTH_SHORT).show(); } }); } }

post方式提交数据：

import java.io.IOException; import java.io.InputStream; import java.io.OutputStream; import java.net.HttpURLConnection; import java.net.MalformedURLException; import java.net.URL; import java.net.URLConnection; import android.os.Bundle; import android.app.Activity; import android.view.Menu; import android.view.View; import android.view.View.OnClickListener; import android.widget.Button; import android.widget.EditText; import android.widget.Toast; public class MainActivity extends Activity { private EditText et_username; private EditText et_password; private Button bt_login; private String path="http://10.0.2.2:8080/day10_login/loginServit"; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); et_username = (EditText) findViewById(R.id.et_username); et_password = (EditText) findViewById(R.id.et_password); bt_login = (Button) findViewById(R.id.bt_login); //给按钮设置监听事件 bt_login.setOnClickListener(new MyOnclickListener()); } public class MyOnclickListener implements OnClickListener{ @Override public void onClick(View v) { //创建子线程，并启动 new Thread(){ public void run() { //获取输入的账号和密码 String username = et_username.getText().toString().trim(); String password = et_password.getText().toString().trim(); //设置参数 String params = "username="+username+"&password="+password; //设置网络 try { URL url = new URL(path); HttpURLConnection connection = (HttpURLConnection) url.openConnection(); //设置请求的方式 connection.setRequestMethod("POST"); //设置请求超时事件 connection.setConnectTimeout(10000); //设置两个请求头 connection.setRequestProperty("Content-Type","application/x-www-form-urlencoded"); //告诉服务器传递数据的长度 connection.setRequestProperty("Content-Length", String.valueOf(params.length())); //打开输出流 connection.setDoOutput(true); //通过流把数据写到服务端 connection.getOutputStream().write(params.getBytes()); //获取响应吗 int code = connection.getResponseCode(); //判断响应吗的状态 if(code==200){ InputStream inputStream = connection.getInputStream(); String result = Utils.getString(inputStream); showToast(result); } } catch (Exception e) { // TODO Auto-generated catch block e.printStackTrace(); } }; }.start(); } } public void showToast(final String result){ runOnUiThread(new Runnable() { @Override public void run() { Toast.makeText(getApplicationContext(), result, Toast.LENGTH_SHORT).show(); } }); } }