05-15 02:45:26.320: E/AndroidRuntime(1161): java.lang.IllegalArgumentException: View not attached to window manager05-15 02:45:26.320: E/AndroidRuntime(1161):     at android.view.WindowManagerImpl.findViewLocked(WindowManagerImpl.java:355)05-15 02:45:26.320: E/AndroidRuntime(1161):     at android.view.WindowManagerImpl.removeView(WindowManagerImpl.java:200)05-15 02:45:26.320: E/AndroidRuntime(1161):     at android.view.Window$LocalWindowManager.removeView(Window.java:432)05-15 02:45:26.320: E/AndroidRuntime(1161):     at android.app.Dialog.dismissDialog(Dialog.java:278)05-15 02:45:26.320: E/AndroidRuntime(1161):     at android.app.Dialog.access$000(Dialog.java:71)05-15 02:45:26.320: E/AndroidRuntime(1161):     at android.app.Dialog$1.run(Dialog.java:111)05-15 02:45:26.320: E/AndroidRuntime(1161):     at android.app.Dialog.dismiss(Dialog.java:268)05-15 02:45:26.320: E/AndroidRuntime(1161):     at com.hilton.effectiveandroid.app.DialogDemo$1.handleMessage(DialogDemo.java:26)05-15 02:45:26.320: E/AndroidRuntime(1161):     at android.os.Handler.dispatchMessage(Handler.java:99)

public class DialogDemo extends Activity {    private static final int DISMISS_DIALOG = 1;        private ProgressDialog mBetterDialog;    private Handler mMainHandler = new Handler() {	@Override	public void handleMessage(Message msg) {	    switch (msg.what) {	    case DISMISS_DIALOG:		Dialog dialog = (Dialog) msg.obj;		dialog.dismiss();		break;	    default:		break;	    }	}    };    @Override    protected void onCreate(Bundle savedInstanceState) {	super.onCreate(savedInstanceState);	setContentView(R.layout.dialog_demo);		final Button sucking = (Button) findViewById(R.id.sucking);	sucking.setOnClickListener(new View.OnClickListener() {	    public void onClick(View v) {		final Activity activity = DialogDemo.this;		final ProgressDialog dialog = new ProgressDialog(activity);		dialog.setTitle("Worst dialogging");		dialog.setMessage("This is the worst dialogging scheme, NEVER use it. This dialog is easy to " +			"run out of its attached activity, yielding WindowManager#BadTokenException if the activity is gone when dismissing");		dialog.setIndeterminate(true);		dialog.setCancelable(true);		// You MUST do the show in main thread anyway		dialog.show();		new Thread(new Runnable() {		    public void run() {			SystemClock.sleep(10000);			/*			 * IllegalArgumentException: View not attached to window manager			 * If the activity showing the dialog was killed before dismiss() out of rotation or locale changed,			 * the dialog will gone with activity, but when dismiss() yields "IllegalArgumentException: View not attached to 			 * window manager".			 * Checking isShowing() won‘t help.			 * Checking activity.isFinishing() won‘t help, either.			 * Dismiss it in main thread also won‘t give any help.			 */			// THIS WON‘t WORK//			if (dialog.isShowing()) {//			    dialog.dismiss();//			}//			if (!activity.isFinishing()) {//			    dialog.dismiss();//			}			Message msg = Message.obtain();			msg.what = DISMISS_DIALOG;			msg.obj = dialog;			mMainHandler.sendMessage(msg);		    }		}).start();	    }	});		final Button better = (Button) findViewById(R.id.better);	better.setOnClickListener(new View.OnClickListener() {	    public void onClick(View v) {		mBetterDialog = new ProgressDialog(DialogDemo.this);		mBetterDialog.setTitle("Better dialogging");		mBetterDialog.setMessage("This dialogging can be used. The dialog object is a field of its activity, so activity can" +				" control it to make sure dialog only lives within activity lifecircle");		mBetterDialog.setIndeterminate(true);		mBetterDialog.setCancelable(true);		// You MUST do the show in main thread anyway		mBetterDialog.show();		new Thread(new Runnable() {		    public void run() {			SystemClock.sleep(10000);			/*			 * This is much better, mBetterDialog is a field of its activity, so activity can take care of it in order			 * to make sure dialog only live within activity‘s life circle, to avoid any unexpected exceptions.			 */			// THIS really works    			if (mBetterDialog != null && mBetterDialog.isShowing()) {    			    mBetterDialog.dismiss();    			}		    }		}).start();	    }	});		final Button optional = (Button) findViewById(R.id.optional);	optional.setOnClickListener(new View.OnClickListener() {	    @SuppressWarnings("deprecation")	    public void onClick(View v) {		showDialog(0);		new Thread(new Runnable() {		    public void run() {			SystemClock.sleep(10000);			/*			 * This way works best for most of time, except if activity died before dismissing, exception must be			 * thrown: "IllegalArgumentException: View not attached to window manager".			 * Although activity takes care of its belonging dialog, there is no way to operate it manually any more.			 * First you do not have reference to dialog object and second, any manual operation only interferences			 * and breaks state maintained by frameworks.			 */			dismissDialog(0);		    }		}).start();	    }	});    }    @Override    protected Dialog onCreateDialog(int id) {	ProgressDialog d = new ProgressDialog(this);	d.setTitle("Optional dialogging");	d.setMessage("This dialogging scheme works best for most times, the dialogs are all taken care of by activitys and frameworks" +			". Except for activity being killed during dialog showing");	d.setIndeterminate(true);	d.setCancelable(true);	return d;    }    @Override    protected void onDestroy() {	super.onDestroy();	// Activity is dying, all its belonging dialogs should be dismissed, of course.	if (mBetterDialog != null && mBetterDialog.isShowing()) {	    mBetterDialog.dismiss();	    mBetterDialog = null;	}	// For dialogs showed via showDialog(int), no way to stop it in onDestroy()//	dismissDialog(0); // cause "IllegalArgumentException: no dialog with id 0 was ever shown via Activity#showDialog"			    // This is because Activity has to manage its dialog during onPause() and onResume() to restore	                  // dialogs‘ state. So if you manually dismiss it in onDestroy(), it will cause JE.	//	removeDialog(0);// cause "IllegalArgumentException: no dialog with id 0 was ever shown via Activity#showDialog", when			// dismissing in thread. 	              // This is because Activity has to manage its dialog during onPause() and onResume() to restore                     // dialogs‘ state. So if you manually dismiss it in onDestroy(), it will cause JE.    }}