Implementation of the Android network communication base class and android Network Communication

Implementation of the Android network communication base class and android Network Communication

To facilitate our communication with the server, we need to implement a network communication base class.

The implementation code is as follows:

Import java. io. BufferedReader;
Import java. io. BufferedWriter;
Import java. io. IOException;
Import java. io. InputStreamReader;
Import java. io. OutputStreamWriter;
Import java.net. MalformedURLException;
Import java.net. URL;
Import java.net. URLConnection;
Import com. jikexueyuan. secret. Config;
Import android. OS. AsyncTask;


Public class NetConnection {
/**
*
* @ Param url: communication address
* @ Param method: communication method get post
* @ Param successCallback: the caller is notified of successful calls.
* @ Param failCallback: The caller fails to be notified.
* @ Param kvs variable communication string parameter
*/
Public NetConnection (final String url, final HttpMethod method, final SuccessCallback successCallback, final FailCallback failCallback, final String... kvs ){

// The network link will block the main thread and the asynchronous task needs to execute the network link
New AsyncTask <Void, Void, String> (){


@ Override
Protected String doInBackground (Void... arg0 ){
StringBuffer paramsStr = new StringBuffer ();
For (int I = 0; I <kvs. length; I + = 2 ){
ParamsStr. append (kvs [I]). append ("="). append (kvs [I + 1]). append ("&");
}

Try {
URLConnection uc;
Switch (method ){
Case POST: // post Communication
Uc = new URL (url). openConnection ();
Uc. setDoOutput (true );
BufferedWriter bw = new BufferedWriter (new OutputStreamWriter (uc. getOutputStream (), Config. CHARSET ));
Bw. write (paramsStr. toString ());
Bw. flush ();
Break;


Default: // get
Uc = new URL (url + "? "+ ParamsStr. toString (). openConnection ();
Break;
}
System. out. println ("Request url:" + uc. getURL ());
System. out. println ("Request data:" + paramsStr );


BufferedReader br = new BufferedReader (new InputStreamReader (uc. getInputStream (), Config. CHARSET ));
String line = null;
StringBuffer result = new StringBuffer ();
While (line = br. readLine ())! = Null ){
Result. append (line );
}
System. out. println ("Result" + result );
Return result. toString ();

} Catch (MalformedURLException e ){
// TODO Auto-generated catch block
E. printStackTrace ();
} Catch (IOException e ){
// TODO Auto-generated catch block
E. printStackTrace ();
}
Return null;
}
// Notify the caller
@ Override
Protected void onPostExecute (String result ){
Super. onPostExecute (result );
If (result! = Null ){
If (successCallback! = Null ){
SuccessCallback. onSuccess (result );
}
} Else {
If (failCallback! = Null ){
FailCallback. onFaid ();
}
}
}
Cmd.exe cute ();
}

Public static interface SuccessCallback {
Void onSuccess (String result );
}

Public static interface FailCallback {
Void onFaid ();
}
}