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POPerform several tasks synchronously in Android
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3787841
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2010-09-24T14:05:02.153
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2010-09-28T18:56:38.020
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2010-09-24T14:14:37.650
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Body
I don't know how to elegantly solve the following task: <ol> <li>I have several blocks of code (operation) to execute. </li> <li>Each block can return <code>true</code> of <code>false</code> to indicate that further execution is possible.</li> <li>Inside of each block I have to use asyncronous methods calls (Because Android is completeley asynchronous).</li> </ol> Example of processing operations (not working now as expected): <pre><code> List<Operation> operations = command.getOperations(); for (Operation operation : operations) { Log.d(TAG, "Processing operation: " + operation); OperationResult result = operation.execute(activity); Log.d(TAG, "Operation result is: " + result); if (!result.canContinue()) { break; } } </code></pre> The problem is that inside of the operation I need, for example, display AlertDialog and wait for the input. But after I call <code>dialog.show()</code> my method <code>execute</code> finishes and it returns incorrect result. Example of the button listener, registerd with AlertDialog is below: <pre><code> final OperationResult result = new OperationResult(); final class ButtonListener implements DialogInterface.OnClickListener { public void onClick(DialogInterface dialog, int id) { switch (id) { case DialogInterface.BUTTON_POSITIVE: { result.setCanContinue(true); } case DialogInterface.BUTTON_NEGATIVE: { dialog.cancel(); result.setCanContinue(false); } } } </code></pre> How should I modify processing of operations to support asynchronous model of Android?
Tags
<android><user-interface><asynchronous><interaction>
Title
Perform several tasks synchronously in Android
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