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
		}
	}
}