android访问php webservice简单一例

如果是PHP做的服务端,要用android去访问,如何办?当然可以用REST,但也可以用点
笨的方法,比如PHP的服务端可以用JSON和XML提供返回的数据,而android端则可以用
APACHE的httpclient去访问.
下面是一个例子,假设数据表中users表有如下字段(mysql):
idusers,UserName,FullName,加点数据.然后在服务端PHP,建立一个
webservice1.php,作用是直接返回服务端数据库的数据,如下:

<?php if(isset($_GET['user']) && intval($_GET['user'])) {     $format = strtolower($_GET['format']) == 'json' ? 'json' : 'xml'; //xml is the default  $user_id = intval($_GET['user']); //no default  /* 连接数据库*/  $link = mysql_connect('localhost','root','xxxxx') or die('Cannot connect to the DB');  mysql_select_db('jsonandroid',$link) or die('Cannot select the DB');     $query = "SELECT * FROM `users`;";  $result = mysql_query($query,$link) or die('Errant query:  '.$query);    $posts = array();  if(mysql_num_rows($result)) {    while($post = mysql_fetch_assoc($result)) {      $posts[] = array('post'=>$post);    }  }  /* json格式*/  if($format == 'json') {    header('Content-type: application/json');    echo json_encode(array('posts'=>$posts));  }  else {    header('Content-type: text/xml');    echo '<posts>';    foreach($posts as $index => $post) {      if(is_array($post)) {        foreach($post as $key => $value) {          echo '<',$key,'>';          if(is_array($value)) {            foreach($value as $tag => $val) {              echo '<',$tag,'>',htmlentities($val),'</',$tag,'>';            }          }          echo '</',$key,'>';        }      }    }    echo '</posts>';  }  } ?>

则可以把数据表输出为JSON或者XML格式了.客户端的ANDROID调用:

try {HttpParams httpParams = new BasicHttpParams();HttpConnectionParams.setConnectionTimeout(httpParams,TIMEOUT_MILLISEC);HttpConnectionParams.setSoTimeout(httpParams, TIMEOUT_MILLISEC);HttpParams p = new BasicHttpParams();p.setParameter("user", "1");HttpClient httpclient = new DefaultHttpClient(p);String url = "http://10.0.2.2:8082/myphp/phpWebservice/webservice1.php?user=1&format=json";HttpPost httppost = new HttpPost(url);try {Log.i(getClass().getSimpleName(), "send  task - start");List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>(2);nameValuePairs.add(new BasicNameValuePair("user", "1"));httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));ResponseHandler<String> responseHandler = new BasicResponseHandler();String responseBody = httpclient.execute(httppost,responseHandler);// 解析JSON返回的JSONObject json = new JSONObject(responseBody);JSONArray jArray = json.getJSONArray("posts");ArrayList<HashMap<String, String>> mylist = new ArrayList<HashMap<String, String>>();for (int i = 0; i < jArray.length(); i++) {HashMap<String, String> map = new HashMap<String, String>();JSONObject e = jArray.getJSONObject(i);String s = e.getString("post");JSONObject jObject = new JSONObject(s);map.put("idusers", jObject.getString("idusers"));map.put("UserName", jObject.getString("UserName"));map.put("FullName", jObject.getString("FullName"));mylist.add(map);}Toast.makeText(this, responseBody, Toast.LENGTH_LONG).show();

再搞个webservice2.php,该文件用来把客户端传送过去的JSON数据保存

<?php $json = file_get_contents('php://input');$obj = json_decode($json);//echo $json;//保存数据库$con = mysql_connect('localhost','root','XXX') or die('Cannot connect to the DB');mysql_select_db('jsonandroid',$con);  mysql_query("INSERT INTO `users` (UserName, FullName)VALUES ('".$obj->{'UserName'}."', '".$obj->{'FullName'}."')");mysql_close($con);  $posts = array(1);    header('Content-type: application/json');    echo json_encode(array('posts'=>$posts));?>

而ANDROID端的,可以构造JSON,发送到webservice2.php

try {JSONObject json = new JSONObject();json.put("UserName", "test2");json.put("FullName", "1234567");HttpParams httpParams = new BasicHttpParams();HttpConnectionParams.setConnectionTimeout(httpParams,TIMEOUT_MILLISEC);HttpConnectionParams.setSoTimeout(httpParams, TIMEOUT_MILLISEC);HttpClient client = new DefaultHttpClient(httpParams);String url = "http://10.0.2.2:8082//myphp/phpWebservice/webservice2.php";HttpPost request = new HttpPost(url);request.setEntity(new ByteArrayEntity(json.toString().getBytes("UTF8")));request.setHeader("json", json.toString());HttpResponse response = client.execute(request);HttpEntity entity = response.getEntity();if (entity != null) {InputStream instream = entity.getContent();String result = RestClient.convertStreamToString(instream);Log.i("Read from server", result);Toast.makeText(this,  result,Toast.LENGTH_LONG).show();}

这样,就可以把ANDROID发送的数据保存到服务端了

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