Android学习之post请求方式

main.xml:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
  xmlns:android="http://schemas.android.com/apk/res/android"
  android:orientation="vertical"
  android:layout_width="fill_parent"
  android:layout_height="fill_parent">
  <TextView
    android:id="@+id/info"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"/>
</LinearLayout>

MyWebDemo.java:

import java.util.ArrayList;
import java.util.List;

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.protocol.HTTP;
import org.apache.http.util.EntityUtils;

import android.app.Activity;
import android.os.Bundle;
import android.widget.TextView;

public class MyWebDemo extends Activity {
  private static final String URL = "http://www.java123.cn/aaa/android.jsp" ;
  private TextView info = null ;                    // 文本组件
  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    super.setContentView(R.layout.main);              // 调用布局管理器
    this.info = (TextView) super.findViewById(R.id.info);       // 取得文本组件
    boolean flag = false;                     // 判断标记
    try {
      HttpPost request = new HttpPost(URL);           // 提交路径
      List<NameValuePair> params = new ArrayList<NameValuePair>();// 设置提交参数
      params.add(new BasicNameValuePair("id", "100"));  // 设置id参数
      params.add(new BasicNameValuePair("password", "111111"));// 设置password参数
      request.setEntity(new UrlEncodedFormEntity(params,
          HTTP.UTF_8));                   // 设置编码
      HttpResponse response = new DefaultHttpClient()       
        .execute(request);                    // 接收回应
      if (response.getStatusLine().getStatusCode() != 404) {    // 请求正常
        flag = Boolean.parseBoolean(EntityUtils.toString(
            response.getEntity()).trim());          // 接收返回的信息
      }
    } catch (Exception e) {
      e.printStackTrace() ;
      info.setText("WEB服务器连接失败。") ;
    }
    if (flag) {                           // 判断返回数据
      info.setText("用户登陆成功！") ;               // 设置文本
    } else {
      info.setText("用户登陆失败！") ;               // 设置文本
    }
  }
}