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POHow to display a Toast in Android AsyncTask?
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  1. POHow to display a Toast in Android AsyncTask?
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    copied!<p>I am trying to display Toast in my initial_background class extended with <code>AsyncTask&lt;URL, Integer, Long&gt;</code>. I am receiving this error in logcat.</p> <pre><code>public class InitialBackgroundTask extends AsyncTask&lt;URL, Integer, Long&gt; { @Override protected Long doInBackground(URL... params) { // TODO Auto-generated method stub show a = new show(); a.loop(); return null; } public class show { void loop() { for(int i=0; i&lt;10; i++) { Toast.makeText(MainActivity.me, "test", Toast.LENGTH_LONG).show(); } } } 05-30 12:08:12.641: E/AndroidRuntime(30840): FATAL EXCEPTION: AsyncTask #1 05-30 12:08:12.641: E/AndroidRuntime(30840): java.lang.RuntimeException: An error occured while executing doInBackground() 05-30 12:08:12.641: E/AndroidRuntime(30840): at android.os.AsyncTask$3.done(AsyncTask.java:278) 05-30 12:08:12.641: E/AndroidRuntime(30840): at java.util.concurrent.FutureTask$Sync.innerSetException(FutureTask.java:273) 05-30 12:08:12.641: E/AndroidRuntime(30840): at java.util.concurrent.FutureTask.setException(FutureTask.java:124) 05-30 12:08:12.641: E/AndroidRuntime(30840): at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:307) 05-30 12:08:12.641: E/AndroidRuntime(30840): at java.util.concurrent.FutureTask.run(FutureTask.java:137) 05-30 12:08:12.641: E/AndroidRuntime(30840): at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:208) 05-30 12:08:12.641: E/AndroidRuntime(30840): at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1076) 05-30 12:08:12.641: E/AndroidRuntime(30840): at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:569) 05-30 12:08:12.641: E/AndroidRuntime(30840): at java.lang.Thread.run(Thread.java:856) 05-30 12:08:12.641: E/AndroidRuntime(30840): Caused by: java.lang.RuntimeException: Can't create handler inside thread that has not called Looper.prepare() 05-30 12:08:12.641: E/AndroidRuntime(30840): at android.os.Handler.&lt;init&gt;(Handler.java:121) 05-30 12:08:12.641: E/AndroidRuntime(30840): at android.widget.Toast$TN.&lt;init&gt;(Toast.java:317) 05-30 12:08:12.641: E/AndroidRuntime(30840): at android.widget.Toast.&lt;init&gt;(Toast.java:91) 05-30 12:08:12.641: E/AndroidRuntime(30840): at android.widget.Toast.makeText(Toast.java:233) 05-30 12:08:12.641: E/AndroidRuntime(30840): at com.example.toast.show.loop(show.java:11) 05-30 12:08:12.641: E/AndroidRuntime(30840): at com.example.toast.InitialBackgroundTask.doInBackground(InitialBackgroundTask.java:13) 05-30 12:08:12.641: E/AndroidRuntime(30840): at com.example.toast.InitialBackgroundTask.doInBackground(InitialBackgroundTask.java:1) 05-30 12:08:12.641: E/AndroidRuntime(30840): at android.os.AsyncTask$2.call(AsyncTask.java:264) 05-30 12:08:12.641: E/AndroidRuntime(30840): at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:305) 05-30 12:08:12.641: E/AndroidRuntime(30840): ... 5 more </code></pre> <p>The above code is showing the whole story. Actually, I want to show toast in doInBackground method</p>
 

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