Correct you can't do this, very much by design. On Fri, Mar 11, 2011 at 7:05 AM, Justin Anderson <[email protected]>wrote:
> AFAIK that is not possible... I don't think you can redirect events to > other activities that you don't control. That would be a big security risk. > > Thanks, > Justin Anderson > MagouyaWare Developer > http://sites.google.com/site/magouyaware > > > > On Fri, Mar 11, 2011 at 3:44 AM, praveen kumar < > [email protected]> wrote: > >> Hi, >> I want to override the back key of the Android device to display a >> dialog, >> which consists of two buttons say "Back" and "Exit". when you press >> the Back button >> in dialog it should dispatch back key to the top activity which is >> currently running, i can able to get >> system context by adding following code snippet to >> <android_source_directory>frameworks/ >> base/services/java/com/android/server/WindowManagerService.java. >> >> ActivityThread at = ActivityThread.currentActivityThread(); >> if (at == null) { >> Looper.prepare(); >> at = ActivityThread.systemMain(); >> } >> if(at != null){ >> sysContext = at.getSystemContext(); >> Log.d(TAG, "SystemContext = " + sysContext); >> } >> >> to display the dialog i added following code >> Dialog dialog = new Dialog(myContext); >> dialog.setContentView(com.android.internal.R.layout.<my-layout-name>); >> dialog.setTitle("Custom Dialog"); >> dialog.show(); >> >> >> Using sysContext, I can able to display toast, and I can able to >> launch the activity, but >> when i try to display a dialog using the same sysContext i got the >> error saying, >> unable to add window "window token is null" it would be great if you >> give any input >> why it is not able to display dialog using sysConttext? >> >> i added the following code, snippet to get top activity pid >> >> am = (ActivityManager) >> myContext.getSystemService(Activity.ACTIVITY_SERVICE); >> currentPackageName = >> am.getRunningTasks(1).get(0).topActivity.getPackageName(); >> >> List<ActivityManager.RunningAppProcessInfo> processes; >> processes = am.getRunningAppProcesses(); >> for(ActivityManager.RunningAppProcessInfo info: processes) { >> Log.i("Process:", info.processName); >> if(currentPackageName.equalsIgnoreCase(info.processName)){ >> Log.i(TAG, "Found !"); >> mpid = info.pid; //pid of top Activity >> muid = 0; // will be always 0 >> } >> } >> >> private Handler msgHandler = new Handler(){ >> //this method will handle the calls from other threads. >> public void handleMessage(Message msg) { >> int result = -1; >> switch (msg.what) { >> case TPMUHelper.DISPATCH_BACK_KEY: >> Log.d(TAG, "Dispatching Back_Key"); >> code = KeyEvent.KEYCODE_BACK; >> KeyEvent backEvent = new KeyEvent(downTime, >> eventTime, >> action, code, repeatCount, metaState, >> deviceId, scancode, KeyEvent.FLAG_FROM_SYSTEM); >> Log.i(TAG, "PID = " + mpid + ", UID = " +muid); >> result = dispatchKey(backEvent, mpid, muid); >> Log.d(TAG, "Dispatch Key Returns = " + result); >> break; >> } >> } >> }; >> >> When i send "DISPATCH_BACK_KEY" message from my-activity "Back" button >> press event, it comes here >> and dispatch back key, dispatchkey(KeyEvent event, int pid, int uid) >> returns '1', i am success with >> this, however currently running activity is not getting closed. simply >> what i need is, i want to >> send back key to whichever the activity is currently running, (system >> application or 3rd party >> application). input regarding the same is appreciated. >> >> Thanks & Regards >> Praveen >> >> -- >> 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 >> > > -- > 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 > -- Dianne Hackborn Android framework engineer [email protected] Note: please don't send private questions to me, as I don't have time to provide private support, and so won't reply to such e-mails. All such questions should be posted on public forums, where I and others can see and answer them. -- 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
