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Android定时从服务器获取数据并刷新
来源:互联网   发布日期:2015-09-28 16:22:26   浏览:1592次  

导读:import java.io.BufferedReader;import java.io.IOException;import java.io.InputStream;import java.io.InputStreamReader;import java.io.UnsupportedEncodingException;import java.net.HttpURLConnec......

import java.io.BufferedReader;

import java.io.IOException;

import java.io.InputStream;

import java.io.InputStreamReader;

import java.io.UnsupportedEncodingException;

import java.net.HttpURLConnection;

import java.net.MalformedURLException;

import java.net.URL;

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.HttpGet;

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.os.Bundle;

import android.os.Handler;

import android.os.Message;

import android.view.View;

import android.widget.Button;

import android.widget.TextView;

public class Test extends Activity implements Runnable {

/** Called when the activity is first created. */

private Button btn_get = null;

private Button btn_post = null;

private TextView tv_rp = null;

@Override

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.main);

btn_get = (Button) this.findViewById(R.id.Button01);

btn_post = (Button) this.findViewById(R.id.Button02);

tv_rp = (TextView) this.findViewById(R.id.TextView);

btn_get.setOnClickListener(new Button.OnClickListener() {

public void onClick(View v) {

// TODO Auto-generated method stub

String httpUrl = "http://192.168.0.132:8080/Android/httpreq.jsp?par=request-get";

HttpGet request = new HttpGet(httpUrl);

HttpClient httpClient = new DefaultHttpClient();

try {

HttpResponse response = httpClient.execute(request);

if (response.getStatusLine().getStatusCode() == HttpStatus.SC_OK) {

String str = EntityUtils.toString(response.getEntity());

tv_rp.setText(str);

} else {

tv_rp.setText("请求错误");

}

} catch (ClientProtocolException e) {

// TODO Auto-generated catch block

e.printStackTrace();

} catch (IOException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

}

});

btn_post.setOnClickListener(new Button.OnClickListener() {

public void onClick(View v) {

// TODO Auto-generated method stub

String httpUrl = "http://192.168.0.132:8080/Android/httpreq.jsp";

HttpPost request = new HttpPost(httpUrl);

List<NameValuePair> params = new ArrayList<NameValuePair>();

params.add(new BasicNameValuePair("par", "request-post"));

try {

HttpEntity entity = new UrlEncodedFormEntity(params,

"UTF-8");

request.setEntity(entity);

HttpClient client = new DefaultHttpClient();

HttpResponse response = client.execute(request);

if (response.getStatusLine().getStatusCode() == HttpStatus.SC_OK) {

String str = EntityUtils.toString(response.getEntity());

tv_rp.setText(str);

} else {

tv_rp.setText("请求错误");

}

} catch (UnsupportedEncodingException e) {

// TODO Auto-generated catch block

e.printStackTrace();

} catch (ClientProtocolException e) {

// TODO Auto-generated catch block

e.printStackTrace();

} catch (IOException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

}

});

new Thread(this).start();

}

public void refresh() {

String httpUrl = "http://192.168.0.132:8080/Android/httpreq.jsp";

try {

URL url = new URL(httpUrl);

HttpURLConnection urlConn = (HttpURLConnection) url

.openConnection();

urlConn.connect();

InputStream input = urlConn.getInputStream();

InputStreamReader inputreader = new InputStreamReader(input);

BufferedReader reader = new BufferedReader(inputreader);

String str = null;

StringBuffer sb = new StringBuffer();

while ((str = reader.readLine()) != null) {

sb.append(str).append("\n");

}

if (sb != null) {

tv_rp.setText(sb.toString());

} else {

tv_rp.setText("NULL");

}

reader.close();

inputreader.close();

input.close();

reader = null;

inputreader = null;

input = null;

} catch (MalformedURLException e) {

e.printStackTrace();

} catch (IOException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

}

public Handler handler = new Handler() {

public void handleMessage(Message msg) {

super.handleMessage(msg);

refresh();

}

};

public void run() {

// TODO Auto-generated method stub

while (true) {

try {

Thread.sleep(1000);

handler.sendMessage(handler.obtainMessage());

} catch (InterruptedException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

}

}

}

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