Why is dialog.show() causing my app to crash?
<p>I've been trying to get a dialog message to work on android and the app always crash when it reaches "dialog.show();"</p>

<pre><code>public class Logic extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {

    AlertDialog.Builder dialogBuilder = new AlertDialog.Builder(context);
    dialogBuilder.setTitle("Alarm");
    dialogBuilder.setMessage(messageActivity.getMes());
    dialogBuilder.setPositiveButton("OK",
            new DialogInterface.OnClickListener() {
                @Override
                public void onClick(DialogInterface dialog, int which) {
                    dialog.dismiss();
                }
            });
    AlertDialog dialog = dialogBuilder.create();
    dialog.show();
}
}
</code></pre>

<p>Here is my logcat:</p>

<pre><code>FATAL EXCEPTION: main

Process: it226.myapplicationit226androidapp, PID: 19598
java.lang.RuntimeException: Unable to start receiver it226.myapplicationit226androidapp.Logic: android.view.WindowManager$BadTokenException: Unable to add window -- token null is not for an application
    at android.app.ActivityThread.handleReceiver(ActivityThread.java:2732)
    at android.app.ActivityThread.-wrap14(ActivityThread.java)
    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1421)
    at android.os.Handler.dispatchMessage(Handler.java:102)
    at android.os.Looper.loop(Looper.java:148)
    at android.app.ActivityThread.main(ActivityThread.java:5417)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
 Caused by: android.view.WindowManager$BadTokenException: Unable to add window -- token null is not for an application
    at android.view.ViewRootImpl.setView(ViewRootImpl.java:571)
    at android.view.WindowManagerGlobal.addView(WindowManagerGlobal.java:310)
    at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:85)
    at android.app.Dialog.show(Dialog.java:319)
    at it226.myapplicationit226androidapp.Logic.onReceive(Logic.java:65)
    at android.app.ActivityThread.handleReceiver(ActivityThread.java:2725)
    at android.app.ActivityThread.-wrap14(ActivityThread.java) 
    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1421) 
    at android.os.Handler.dispatchMessage(Handler.java:102) 
    at android.os.Looper.loop(Looper.java:148) 
    at android.app.ActivityThread.main(ActivityThread.java:5417) 
    at java.lang.reflect.Method.invoke(Native Method) 
</code></pre>