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POCommon class for AsyncTask in Android?
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  1. POCommon class for AsyncTask in Android?
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    copied!<p>I have a common class say for eg Class A which extends <code>AsyncTask</code> and has all the methods implemented i.e. <code>onPreExecute</code>, <code>doinbackground</code> and <code>onPostExecute</code>.</p> <p>Now, there are other classes which want to use Class A object.</p> <p>Say Class B uses class A in the below manner</p> <pre><code>A a = new A(context) a.execute(url) </code></pre> <p>Then i fetch the result in get method. But get method is not the proper way of using AsyncTask. I will like to get the result in <code>onPostExecute</code>. For that i tried using a boolean parameter which will get true only in <code>onpostexecute</code>. The class B will check till it gets true and when it gets true it will fetch the result.</p> <p>But this is somehow blocking the application.</p> <p>I have placed the code for asynctask below.</p> <p>'</p> <pre><code>import java.io.IOException; import org.apache.http.client.ClientProtocolException; import org.apache.http.client.HttpClient; import org.apache.http.client.ResponseHandler; import org.apache.http.client.methods.HttpGet; import org.apache.http.impl.client.BasicResponseHandler; import org.apache.http.impl.client.DefaultHttpClient; import android.app.ProgressDialog; import android.content.Context; import android.os.AsyncTask; public class A extends AsyncTask&lt;String, Void, String&gt; { private Context context = null; private final HttpClient httpClient = new DefaultHttpClient(); private String content = null; //private String error = null; private String finalResult = null; private static boolean isResult = false; private ProgressDialog progressDialog = null; public BabbleVilleSyncTask(Context context) { this.context = context; progressDialog = new ProgressDialog(this.context); } protected void onPreExecute() { progressDialog.setMessage("Please Wait...."); progressDialog.show(); } protected String doInBackground(String... urls) { try { //urls[0] = URLEncoder.encode(urls[0], "UTF-8"); HttpGet httpget = new HttpGet(urls[0]); ResponseHandler&lt;String&gt; responseHandler = new BasicResponseHandler(); content = httpClient.execute(httpget, responseHandler); } /*catch(UnsupportedEncodingException ue) { error = ue.getMessage(); }*/ catch (ClientProtocolException e) { //error = e.getMessage(); cancel(true); } catch (IOException e) { //error = e.getMessage(); cancel(true); } httpClient.getConnectionManager().shutdown(); return content; } protected void onPostExecute(String result) { finalResult = result; progressDialog.dismiss(); System.out.println("on Post execute called"); isResult = true; } public boolean getIsResult() { return isResult; } public void setIsResult(boolean flag) { isResult = flag; } public String getResult() { return finalResult; } } </code></pre> <p>'</p> <p>Can someone let me know what the issue may be?</p> <p>Regards</p> <p>Sunil</p>
 

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