Android用Apache HttpClient 实现POST和Get请求

殇帝刘玢你

　　类 : org.apache.http.client.HttpClient;
　　
　　1.  GET实现

package com.yarin.android.Examples_08_02;
import java.io.IOException;
import org.apache.http.HttpResponse;
import org.apache.http.HttpStatus;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.util.EntityUtils;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
public class Activity02 extends Activity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.http);
TextView mTextView = (TextView) this.findViewById(R.id.TextView_HTTP);
// http地址
String httpUrl = "http://192.168.1.110:8080/httpget.jsp?par=HttpClient_android_Get";
// HttpGet连接对象
HttpGet httpRequest = new HttpGet(httpUrl);
try {
// 取得HttpClient对象
HttpClient httpclient = new DefaultHttpClient();
// 请求HttpClient，取得HttpResponse
HttpResponse httpResponse = httpclient.execute(httpRequest);
// 请求成功
if (httpResponse.getStatusLine().getStatusCode() == HttpStatus.SC_OK) {
// 取得返回的字符串
String strResult = EntityUtils.toString(httpResponse
.getEntity());
mTextView.setText(strResult);
} else {
mTextView.setText("请求错误!");
}
} catch (ClientProtocolException e) {
mTextView.setText(e.getMessage().toString());
} catch (IOException e) {
mTextView.setText(e.getMessage().toString());
} catch (Exception e) {
mTextView.setText(e.getMessage().toString());
}
// 设置按键事件监听
Button button_Back = (Button) findViewById(R.id.Button_Back);
/* 监听button的事件信息 */
button_Back.setOnClickListener(new Button.OnClickListener() {
public void onClick(View v) {
/* 新建一个Intent对象 */
Intent intent = new Intent();
/* 指定intent要启动的类 */
intent.setClass(Activity02.this, Activity01.class);
/* 启动一个新的Activity */
startActivity(intent);
/* 关闭当前的Activity */
Activity02.this.finish();
}
});
}
}
　　2.  POST

package com.yarin.android.Examples_08_02;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.HttpStatus;
import org.apache.http.NameValuePair;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
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.util.EntityUtils;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
public class Activity03 extends Activity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.http);
TextView mTextView = (TextView) this.findViewById(R.id.TextView_HTTP);
// http地址
String httpUrl = "http://192.168.1.110:8080/httpget.jsp";
// HttpPost连接对象
HttpPost httpRequest = new HttpPost(httpUrl);
// 使用NameValuePair来保存要传递的Post参数
List<NameValuePair> params = new ArrayList<NameValuePair>();
// 添加要传递的参数
params.add(new BasicNameValuePair("par", "HttpClient_android_Post"));
try {
// 设置字符集
HttpEntity httpentity = new UrlEncodedFormEntity(params, "gb2312");
// 请求httpRequest
httpRequest.setEntity(httpentity);
// 取得默认的HttpClient
HttpClient httpclient = new DefaultHttpClient();
// 取得HttpResponse
HttpResponse httpResponse = httpclient.execute(httpRequest);
// HttpStatus.SC_OK表示连接成功
if (httpResponse.getStatusLine().getStatusCode() == HttpStatus.SC_OK) {
// 取得返回的字符串
String strResult = EntityUtils.toString(httpResponse.getEntity());
mTextView.setText(strResult);
} else {
mTextView.setText("请求错误!");
}
} catch (ClientProtocolException e) {
mTextView.setText(e.getMessage().toString());
} catch (IOException e) {
mTextView.setText(e.getMessage().toString());
} catch (Exception e) {
mTextView.setText(e.getMessage().toString());
}
// 设置按键事件监听
Button button_Back = (Button) findViewById(R.id.Button_Back);
/* 监听button的事件信息 */
button_Back.setOnClickListener(new Button.OnClickListener() {
public void onClick(View v) {
/* 新建一个Intent对象 */
Intent intent = new Intent();
/* 指定intent要启动的类 */
intent.setClass(Activity03.this, Activity01.class);
/* 启动一个新的Activity */
startActivity(intent);
/* 关闭当前的Activity */
Activity03.this.finish();
}
});
}
}
　　Apache org.apache.http.client.HttpClient;