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POAndroid - multithreading issues when changing activity
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copied!<p>I have a main menu with an action bar. On create, I run a thread that hits my server for a current status. When Complete, the thread calls a handler which kicks off a constantly running thread that cycles through the items and uses another handler call to change the test in the actionbar. The problem is that when I change views, I either get <code>android.view.WindowLeaked</code> or <code>View not attached to window manager</code></p> <p>Here is some sample code</p> <pre><code>public class MainMenuActivity extends ProtectedWithActionBarActivity{ private int STATUS_COUNTER; private final int RESULT_STATUS_LOADED = 2000; private final int RESULT_SHOW_STATUS = 2001; private CurrentStatusModel currentStatus; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.mainmenu); ActionBar footerbar = (ActionBar)findViewById(R.id.footerbar); footerbar.setTitle("Currently connected to " + PreferencesHelper.getCurrentEnvironment().name()); STATUS_COUNTER = 0; statusLoadThread.start(); } Thread statusLoadThread = new Thread() { @Override public void run() { //set currentStatus with data from server } }; Thread statusDisplayThread = new Thread() { int sleep = 5000; boolean threadDone = false; public void done() { threadDone = true; } @Override public void run() { while(true) { //pick message to send to handler //increment STATUS_COUNTER or reset to 0 when out of bounds try { sleep(sleep); } catch (InterruptedException e) { // TODO Auto-generated catch block e.printStackTrace(); } } } }; private Handler handler = new Handler() { @Override public void handleMessage(Message msg) { switch(msg.what) { case RESULT_STATUS_LOADED: statusDisplayThread.start(); break; case RESULT_SHOW_STATUS: ActionBar footerbar = (ActionBar)findViewById(R.id.footerbar); String message = ((Object[])msg.obj)[0].toString(); OnClickListener listener = (OnClickListener)((Object[])msg.obj)[1]; footerbar.setTitle(message); footerbar.setOnTitleClickListener(listener); break; case ActivityBase.RESULT_ERROR: break; } } }; } </code></pre> <p>I'm not sure if what I'm doing is just wrong or if there is something blatantly obvious that I am missing. What needs to happen is the threads need to stop any time I change screens. Should I use <code>Thread.interrupt();</code> before starting the next activity?</p>

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