StackOverflow2013

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19674631
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2013-10-30T05:37:26.983
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2013-10-30T06:09:39.657
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You can do this by using AsyncTask: <a href="http://developer.android.com/reference/android/os/AsyncTask.html" rel="nofollow">http://developer.android.com/reference/android/os/AsyncTask.html</a> Do note that in some versions on Android, AsyncTask is executed on a single thread. If you need to execute in paralell this need to be set on the task, from the documentation: <blockquote> When first introduced, AsyncTasks were executed serially on a single background thread. Starting with DONUT, this was changed to a pool of threads allowing multiple tasks to operate in parallel. Starting with HONEYCOMB, tasks are executed on a single thread to avoid common application errors caused by parallel execution. If you truly want parallel execution, you can invoke executeOnExecutor(java.util.concurrent.Executor, Object[]) with THREAD_POOL_EXECUTOR. </blockquote> In addition, you will run into concurrency issues, so you should take steps to handle them. It might look like this: <pre><code>public class DoingTwoThings { private AsyncTask<Void, Void, Void> taskA; private AsyncTask<Void, Void, Void> taskB; private volatile int i; public DoingTwoThings() { createTaskA(); createTaskB(); startTasks(); } private void createTaskA() { taskA = new AsyncTask<Void, Void, Void>() { @Override protected Void doInBackground(Void... voids) { doInBackgroundA(); return null; } }; } private void doInBackgroundA() { while (i < 5000) { i++; } } private void createTaskB() { taskB = new AsyncTask<Void, Void, Void>() { @Override protected Void doInBackground(Void... voids) { doInBackGroundB(); return null; } }; } private void doInBackGroundB() { while (i > 0) { i--; } } private void startTasks() { // AsyncTasks executed one one thread in Honeycomb+ unless executed in thread pool manually if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) { taskA.executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR); taskB.executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR); } else { taskA.execute(); taskB.execute(); } }} </code></pre> The code in the overriden "doInBackground()" methods are executed on a different thread. If you need to modify some UI before or after the task is done you can easily override onPreExecute and onPostExecute.
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1. POHow to Run 2 threads simultaneously in android
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