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POAsync task wont stop
 

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    <pre><code>package com.example.asynctask; import android.app.Activity; import android.os.AsyncTask; import android.os.Bundle; import android.util.Log; import android.view.Menu; import android.view.View; import android.widget.ProgressBar; public class MainActivity extends Activity { ProgressBar progressbar; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); progressbar = (ProgressBar) findViewById(R.id.progressBar); } class ProgressTask extends AsyncTask&lt;Integer, Integer, Void&gt; { private boolean flag = true; @Override protected void onPreExecute() { progressbar.setMax(100); } @Override protected void onCancelled() { //progressbar.setMax(0); flag = false; Log.v("onCancelled:flag", String.valueOf(flag)); } @Override protected Void doInBackground(Integer... params) { // TODO Auto-generated method stub int start = params[0]; for (int i = start; i &lt;= 100; i=i+10) { if (!flag) { break; } else { publishProgress(i); try { Thread.sleep(3000); } catch (InterruptedException e) { // TODO Auto-generated catch block Log.e("ThreadError", e.toString()); } } } return null; } @Override protected void onProgressUpdate(Integer... values) { progressbar.setProgress(values[0]); } @Override protected void onPostExecute(Void result) { Log.v("Progress", "Finish"); } } public void onClick(View v) { ProgressTask task = new ProgressTask(); switch (v.getId()) { case R.id.start: task.execute(10); break; case R.id.stop: task.cancel(true); break; } } @Override public boolean onCreateOptionsMenu(Menu menu) { getMenuInflater().inflate(R.menu.main, menu); return true; } } </code></pre> <p>Here is a symple AsyncTask app which starts to update the progress bar when you hit Start. But when you will hit stop, it wont stop. Thing is when you call <strong><em>task.cancel(true)</em></strong>, <strong><em>onCancelled()</em></strong> methods does gets invoked and changes the value of flag to <strong>false</strong> but in <strong><em>onCancelled()</em></strong> value of flag remains true. I have also tried <strong><em>isCancelled()</em></strong> in place of flag varaible with no success. For a moment my problem is similar to <a href="https://stackoverflow.com/questions/4959628/android-asynctask-wont-stop-when-cancelled-why">Ollie C</a>, but no exceptions are thrown in my case. </p>
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    1. USnik
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    1. COIn this line `ProgressTask task = new ProgressTask();`. Your `task` is in the scope of that method. You should create an class instance `task`.
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    2. CO@Wenhui It worked... Thanks
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