下面为使用HttpClient的一个登录服务器的小例子
package com.liang.logindemo; import android.os.Bundle; import android.support.v7.app.ActionBarActivity; import android.view.View; import android.widget.EditText; import android.widget.Toast; import org.apache.http.HttpResponse; import org.apache.http.NameValuePair; import org.apache.http.client.HttpClient; import org.apache.http.client.entity.UrlEncodedFormEntity; import org.apache.http.client.methods.HttpGet; import org.apache.http.client.methods.HttpPost; import org.apache.http.entity.BufferedHttpEntity; import org.apache.http.impl.client.DefaultHttpClient; import org.apache.http.message.BasicNameValuePair; import java.io.BufferedReader; import java.io.InputStream; import java.io.InputStreamReader; import java.io.OutputStream; import java.io.Reader; import java.io.StringReader; import java.io.UnsupportedEncodingException; import java.net.HttpURLConnection; import java.net.URL; import java.net.URLEncoder; import java.util.ArrayList; import java.util.List; public class MainActivity3 extends ActionBarActivity { private EditText et_userName; private EditText et_password; @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); } public void login(View view) { String str=et_userName.getText().toString(); try { str=URLEncoder.encode(str,"utf-8"); } catch (UnsupportedEncodingException e) { e.printStackTrace(); } final String userName=str; final String password=et_password.getText().toString(); //在子线程中访问网络 new Thread(new Runnable() { @Override public void run() { try { final boolean isSuccess =loginByPost(userName,password); //final boolean isSuccess = loginByGet(userName,password); //使用此方法可不使用Handler通知主线程,方法内所做操作由主线程完成 runOnUiThread(new Runnable() { @Override public void run() { if(isSuccess){ Toast.makeText(MainActivity3.this,"成功了!!!",Toast.LENGTH_SHORT).show(); }else{ Toast.makeText(MainActivity3.this,"失败了!!!",Toast.LENGTH_SHORT).show(); } } }); } catch (Exception e) { e.printStackTrace(); } } }).start(); } /** * HttpClient通过GET请求方式访问服务器 * @param userName,password * @return * @throws Exception */ private Boolean loginByGet(String userName,String password) throws Exception{ //服务器地址 String url="http://192.168.1.140:8080/Login/servlet/Login"; String data="?userName="+userName + "&password="+password; HttpClient client=null; //定义一个客户端 client = new DefaultHttpClient(); //定义一个get请求 HttpGet get = new HttpGet(url+data); //执行get请求,获得响应对象 HttpResponse response = client.execute(get); //获得响应状态码 int code = response.getStatusLine().getStatusCode(); //返回结果 if(code==200) { //获得响应内容 InputStream is = response.getEntity().getContent(); BufferedReader reader = new BufferedReader(new InputStreamReader(is)); String text = reader.readLine(); reader.close(); is.close(); return "SUCCESS".equals(text) ? true : false; } if(client!=null){ //关闭连接 client.getConnectionManager().shutdown(); } return false; } /** *HttpClient通过POST请求方式访问服务器 * @param userName * @param password * @return * @throws Exception */ boolean loginByPost(String userName,String password) throws Exception{ //服务器地址 String url="http://192.168.1.140:8080/Login/servlet/Login"; HttpClient client=null; //定义一个客户端 client = new DefaultHttpClient(); //定义一个Post请求 HttpPost post = new HttpPost(url); //设置请求数据 List<NameValuePair> list = new ArrayList<NameValuePair>(); list.add(new BasicNameValuePair("userName",userName)); list.add(new BasicNameValuePair("password",password)); UrlEncodedFormEntity entity = new UrlEncodedFormEntity(list); post.setEntity(entity); //执行get请求,获得响应对象 HttpResponse response = client.execute(post); //获得响应状态码 int code = response.getStatusLine().getStatusCode(); //返回结果 if(code==200) { //获得响应内容 InputStream is = response.getEntity().getContent(); BufferedReader reader = new BufferedReader(new InputStreamReader(is)); String text = reader.readLine(); reader.close(); is.close(); return "SUCCESS".equals(text) ? true : false; } if(client!=null){ //关闭连接 client.getConnectionManager().shutdown(); } return false; } }
需要清单文件中添加网络访问权限
时间: 2024-11-06 03:39:22