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POConvert android AsyncTask call to a separate class and call from all activities
 

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  1. POConvert android AsyncTask call to a separate class and call from all activities
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    <p>I am new to android development. I have a AsyncTask function in my application. Calling http request from all activities. Now in each activity I am using the following class to connect to server, in some activities I even called twice !!.</p> <p>Basically I am a web developer and in such cases we use a single class which can be accessed from entire application(web) and use the common function to do the same activity. The only difference is input and out put will be changed.</p> <p>My doubt is in this case can I use ( convert) this to such a function or class ? My assume is </p> <ol> <li>Create an android class ( which can be accessed from all the activities )</li> <li>Just make the JSON string we need with specific server ( for process in server )</li> <li>Just pass the created json to the created class and then made the http connect )</li> <li>Process the returned data from server</li> <li>Pass that to the corresponding activity</li> </ol> <p>So that I can use the same function for all the activities and I can avoid duplicate query</p> <p>Can I convert this code to such a manner ?</p> <p><strong>My Code</strong></p> <pre><code>public class MainActivity extends Activity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setRequestedOrientation (ActivityInfo.SCREEN_ORIENTATION_PORTRAIT); setContentView(R.layout.activity_main); LogIN loginUser = new LogIN(); LoginUser.execute(""); } private class LogIN extends AsyncTask&lt;String, Integer, String&gt; { @Override protected String doInBackground(String... sUrl) { try { String path = "http://www.domain_name.com/app/checkSession.php"; HttpClient client = new DefaultHttpClient(); HttpConnectionParams.setConnectionTimeout(client.getParams(), 10000); HttpResponse response; JSONObject json = new JSONObject(); try { HttpPost post = new HttpPost(path); json.put("access_token", "123456"); post.setHeader("json", json.toString()); StringEntity se = new StringEntity(json.toString()); se.setContentEncoding((Header) new BasicHeader(HTTP.CONTENT_TYPE, "application/json")); post.setEntity(se); response = client.execute(post); /* Checking response */ if (response != null) { InputStream in = response.getEntity().getContent(); String a = convertStreamToString(in); JSONObject jsono = stringToJsonobj(a); String passedStringValue = jsono.getString("result"); if(passedStringValue.equals("1")){ flags=1; //Log.v("TAGG", "Success"); } else { flags=0; //Log.v("TAGG", "Failed !"); } } } catch (Exception e) { e.printStackTrace(); } } catch (Exception e) { } return null; } @Override protected void onPreExecute() { super.onPreExecute(); showDialogue("Login Processing", "Loading"); } @Override protected void onProgressUpdate(Integer... progress) { super.onProgressUpdate(progress); } @Override protected void onPostExecute(String result) { if(flags.equals(1)){ Itent homepage = new Intent(MainActivity.this, RegisterDevice.class); startActivity(homepage); finish(); } else { Intent homepage = new Intent(MainActivity.this, LoginActivity.class); startActivity(homepage); finish(); } super.onPostExecute(result); } } } </code></pre> <p>Please any one help/advise Thanks in advance</p>
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    1. USramesh
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    1. COYou can always declare Login as a class, just name the class file "Login", and move all your async task code to it
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      1. USChor Wai Chun
    2. COThe easiest way is to pass a parameter of the `Activity` type to the constructor of the `Login` class. So you can call such methods as `startActivity`, `finish` from your task.
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      1. USvorrtex
 

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