It looks like a bug, but you should rethink showing a dialog from a background service.
Users reaaaallly don't like pop-up dialogs or other screens suddenly popping up when they are busy doing something else. The only screen that can get away with this is the phone-application. Instead, consider putting a notification in the top status-bar. Then when the user clicks this notification, start the necessary activity that is appropriate for your application. On Jan 11, 7:52 am, Schoel <[email protected]> wrote: > Hello, > > I have found some weird behaviour which might be a bug. I found it > while developing a quite large application but I've been able to > reproduce the behaviour in a minimal approach so that I can provide > source code. > > I have a service that is constantly running and at certain times it > pops up an activity with Theme.Dialog as theme for the user. > Everything works fine if the main activity of the program has been > destroyed (via back button) or if the main activity is currently > running. > > However, if the main activity of the app has been created and then > minimized (e.g. via Home button), the main activity shows up. It is > not possible to click the buttons of the main activity because it > seems to be hidden behind an invisible dialog activity. It is possible > to click the buttons of the dialog if you know where they are and if > you click the back button, you can see the dialog flashing by as it > disappears and it is then possible to click the main activity buttons. > > I've tested this on HTC Desire 2.2, HTC Wildfire 2.1, HTC Legend 2.1, > Sony x10 mini pro 2.1 and on emulators 2.1 and 2.2. The behaviour > described happens on all 2.1 devices and emulator but not on emulator > 2.2 nor on the Desire with 2.2. > > Source code is provided below. There are 2 buttons in the main > activity, the first, called "Finish" asks the service to popup the > dialog in 3 seconds and then finishes the main activity. This button > is for illustrative purposes only, it works fine. The second button, > called "Post later" just asks the service to popup the dialog in 3 > seconds. If the second button is clicked and before the 3 seconds have > passed, the home button is clicked, the bug appears. > > Source code: > Main.java: > -------------------------------------------------------------- > package com.myapp.DialogBugTest; > > import android.app.Activity; > import android.content.Intent; > import android.os.Bundle; > import android.os.Handler; > import android.view.View; > > public class Main extends Activity > { > private Handler handler = new Handler(); > > private final Runnable runnable = new Runnable() > { > public void run() > { > DialogBugTestService.getInstance().showDialog(); > } > }; > > /** Called when the activity is first created. */ > @Override > public void onCreate(Bundle savedInstanceState) > { > super.onCreate(savedInstanceState); > setContentView(R.layout.main); > > startService(new Intent(this, DialogBugTestService.class)); > } > > public void onFinishButton(View aView) > { > handler.postDelayed(runnable, 3000); > finish(); > } > > public void onLaterButton(View aView) > { > handler.postDelayed(runnable, 3000); > }} > > -------------------------------------------------------------- > main.xml: > -------------------------------------------------------------- > <?xml version="1.0" encoding="utf-8"?> > <LinearLayout xmlns:android="http://schemas.android.com/apk/res/ > android" > android:orientation="vertical" > android:layout_width="fill_parent" > android:layout_height="fill_parent" > > > <Button > android:id="@+id/finish_button" > android:layout_width="fill_parent" > android:layout_height="wrap_content" > android:text="Finish" > android:onClick="onFinishButton" > /> > <Button > android:id="@+id/later_button" > android:layout_width="fill_parent" > android:layout_height="wrap_content" > android:text="Post later" > android:onClick="onLaterButton" > /> > </LinearLayout> > -------------------------------------------------------------- > DialogBugTestService.java: > -------------------------------------------------------------- > package com.myapp.DialogBugTest; > > import android.app.Service; > import android.content.Intent; > import android.os.IBinder; > import android.util.Log; > > public class DialogBugTestService extends Service > { > private static DialogBugTestService instance = null; > @Override > public void onCreate() > { > super.onCreate(); > instance = this; > } > > @Override > public int onStartCommand(Intent intent, int flags, int startId) > { > return START_STICKY; > } > > public static DialogBugTestService getInstance() > { > if (instance == null) > { > Log.e("service", "instance is null!"); > } > return instance; > } > > public void showDialog() > { > Intent intent = new Intent(this, DialogBugDialog.class); > intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK); > startActivity(intent); > } > > @Override > public IBinder onBind(Intent arg0) > { > return null; > }} > > -------------------------------------------------------------- > DialogBugDialog.java: > -------------------------------------------------------------- > package com.optimobile.DialogBugTest; > > import android.app.Activity; > import android.os.Bundle; > import android.view.View; > > public class DialogBugDialog extends Activity > { > > @Override > protected void onCreate(Bundle aSavedInstanceState) > { > super.onCreate(aSavedInstanceState); > setContentView(R.layout.dialog); > } > > public void onOk(View aView) > { > finish(); > } > > } > > -------------------------------------------------------------- > dialog.xml: > -------------------------------------------------------------- > <?xml version="1.0" encoding="utf-8"?> > <LinearLayout xmlns:android="http://schemas.android.com/apk/res/ > android" > android:orientation="vertical" > android:layout_width="fill_parent" > android:layout_height="fill_parent" > > > <Button > android:id="@+id/ok_button" > android:layout_width="fill_parent" > android:layout_height="fill_parent" > android:text="OK" > android:onClick="onOk" > /> > </LinearLayout> > -------------------------------------------------------------- > > I've also tried this without the Theme.Dialog as theme and it then > works fine. I also tried it with custom styles and the bug seems to > appear whenever windowIsFloating is set to true. > > Is this a known bug? Are there any workarounds? I really need this > functionality in my app and doing it without a floating window looks > really ugly. -- You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
