Android 定时到服务器取数据并刷新

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();
}
}
}
}

</namevaluepair></namevaluepair>

更多相关文章

随机推荐