一种与服务器交互的方式

来源：互联网发布：西门子plc编程视频编辑：程序博客网时间：2024/05/17 08:35
应用开发中与服务器的交互是必不可少的，一般情况下与服务器交互用到的都是Post方式，因为这种方式的数据量大并且保密性好，这里记录一种与服务器交互的方式，以后用到还可以拿来继续用
package com.example.jsonreq;import java.io.IOException;import java.io.InputStream;import java.io.InputStreamReader;import java.io.UnsupportedEncodingException;import java.util.ArrayList;import java.util.List;import org.apache.http.HttpResponse;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.json.JSONException;import org.json.JSONObject;import android.app.Activity;import android.graphics.Bitmap;import android.graphics.Bitmap.Config;import android.os.Bundle;import android.os.Handler;import android.os.Message;import android.util.Log;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;import android.widget.ImageView;import android.widget.TextView;import com.android.volley.RequestQueue;import com.android.volley.Response;import com.android.volley.VolleyError;import com.android.volley.toolbox.ImageRequest;import com.android.volley.toolbox.Volley;public class Simple extends Activity {//public static String IP = "http://192.168.1.101:8080/Json/Simple";//public static String IP = "http://202.108.5.132/testAndroid.php";public static String IP = "http://1.appprogram.sinaapp.com/testAndroid.php";private TextView content;private Button show;private JSONObject jsonObject;ImageView imageView;public Handler handler = new Handler(){@Overridepublic void handleMessage(Message msg) {// TODO Auto-generated method stubRequestQueue mQueue = Volley.newRequestQueue(Simple.this);String url = null;if (msg.what == 0x123) {String s = msg.getData().getString("content");Log.i("Simple", "msg = " + s);try {jsonObject = new JSONObject(s);if(jsonObject.has("URL")){content.setText(jsonObject.getString("URL"));url = jsonObject.getString("URL");}ImageRequest imageRequest = new ImageRequest(url,new Response.Listener<Bitmap>() {@Overridepublic void onResponse(Bitmap response) {imageView.setImageBitmap(response);}}, 0, 0, Config.RGB_565, new Response.ErrorListener() {@Overridepublic void onErrorResponse(VolleyError error) {imageView.setImageResource(R.drawable.ic_launcher);}});mQueue.add(imageRequest);} catch (JSONException e) {// TODO Auto-generated catch blocke.printStackTrace();}}super.handleMessage(msg);}};@Overrideprotected void onCreate(Bundle savedInstanceState) {// TODO Auto-generated method stubsuper.onCreate(savedInstanceState);setContentView(R.layout.simple);show = (Button)findViewById(R.id.show);content = (TextView)findViewById(R.id.content);imageView = (ImageView) findViewById(R.id.imageView);show.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v) {// TODO Auto-generated method stubnew Thread(){public void run() {HttpClient client = new DefaultHttpClient();HttpPost post = new HttpPost(IP);//JSONObject jsonObject = new JSONObject();try {//jsonObject.put("index", 0);//jsonObject.put("name", "Jack");//StringEntity entity = new StringEntity(jsonObject.toString());List<NameValuePair> nvps = new ArrayList<NameValuePair>();          nvps.add(new BasicNameValuePair("name", "linzhouzhi"));          nvps.add(new BasicNameValuePair("password", "secret"));post.setEntity(new UrlEncodedFormEntity(nvps));HttpResponse response = client.execute(post);int tap = response.getStatusLine().getStatusCode();if (tap == 200) {Message msg = new Message();msg.what = 0x123;Bundle bundle = new Bundle();InputStream is = response.getEntity().getContent();InputStreamReader isr = new InputStreamReader(is);String temp = "";char[] c = new char[100];int i = 0;while((i = isr.read(c)) != -1){temp += new String(c);}Log.i("Simple", "temp = " +temp);bundle.putString("content", temp.trim());msg.setData(bundle);handler.sendMessage(msg);}} catch (UnsupportedEncodingException e) {// TODO Auto-generated catch blocke.printStackTrace();} catch (ClientProtocolException e) {// TODO Auto-generated catch blocke.printStackTrace();} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();}};}.start();}});}}
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