android访问php webservice简单一例

android访问php webservice简单一例

博客分类：

Android

jsonhttpclientandroid

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:

Java代码


<?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:

Java代码


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

Java代码


<?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

Java代码


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