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POBypass modal Android dialogs by clicking buttons twice fast enough?
 

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  1. POBypass modal Android dialogs by clicking buttons twice fast enough?
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    <p>Let's say we have two buttons, each with a OnClickListener. Each of listeners show a ProgressDialog and do some background work. (Behind the scene is an AsyncTask, the dialog is opened in onPreExecute. I don't think it matters, just for the record...). Let's say there is some rule saying no more than one background worker may be active at any given time. </p> <p>My assumption was that the Dialog prevents two background workers running at the same time. I thought the modal dialog blocks the UI and it's not possible to click another button after the show() method of the dialog is called. I was wrong.</p> <p>If you click the buttons fast enough, it's possible to trigger both background workers (almost) at the same time. The log shows that it's possible to click two Buttons within a 150 ms time span despite the Dialog:</p> <pre> 04-14 18:34:04.390: DEBUG/greenrobot(1860): Clicked: 2131034112 04-14 18:34:04.470: DEBUG/greenrobot(1860): doInBackground2: 2131034112 04-14 18:34:04.540: DEBUG/greenrobot(1860): Clicked: 2131034113 04-14 18:34:04.570: DEBUG/greenrobot(1860): doInBackground2: 2131034113 </pre> <p>The dialog code looks like this:</p> <pre><code>progressDialog = new ProgressDialog(currentActivity); progressDialog.setMessage(msg); progressDialog.show(); </code></pre> <p>What did I miss? I hope I missed something really stupid, because if not, I cannot think of a nice and solution preventing UI interaction after the click. Synchronizing the background workers is not a solution because the UI and scenario is more complex. </p>
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    1. USMarkus Junginger
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