Android accesses php to retrieve the json data instance

php code

 
$array = array( 
'username'=>' Yang Zhu ', 
'password'=>'123456', 
'user_id'=>1 
); 
echo json_encode($array); 

java code

 
private void startUrlCheck(String username,String password) 
{ 
HttpClient client = new DefaultHttpClient(); 
StringBuilder builder = new StringBuilder(); 
HttpGet myget = new HttpGet("http://10.0.2.2/Android/index.php"); 
try { 
HttpResponse response = client.execute(myget); 
BufferedReader reader = new BufferedReader(new InputStreamReader( 
response.getEntity().getContent())); 
for (String s = reader.readLine(); s != null; s = reader.readLine()) { 
builder.append(s); 
} 
JSONObject jsonObject = new JSONObject(builder.toString()); 
String re_username = jsonObject.getString("username"); 
String re_password = jsonObject.getString("password"); 
int re_user_id = jsonObject.getInt("user_id"); 
setTitle(" The user id_"+re_user_id); 
Log.v("url response", "true="+re_username); 
Log.v("url response", "true="+re_password); 
} catch (Exception e) { 
Log.v("url response", "false"); 
e.printStackTrace(); 
} 
} 

Operating instructions

 
 Among them http://10.0.2.2 for Android Access to the machine url the ip Address. Corresponding to the computer test http://127.0.0.1 
 In addition, exceptions are thrown when the code is executed  
java.net.SocketException: Permission denied 
 This is insufficient access to the network for the application   in AndroidManifest.xml , the following configuration is required:  
<uses-permission Android:name="android.permission.INTERNET" /> 
 Add in  
</manifest> 
 It was done before  
 Then the test passed.