Re: [android-developers] Re: How can I know when the home button has been pressed?
Hello Kostya, Please help me if you have any idea where to decrypt the encrypted sms message. I have encrypted the sms under onclick method. But I don't know where to decrypt it at time of delivery to the receiver. I am using android emulator not on real phone devices. Please let me know your idea. Thanks!. On Sun, Jun 12, 2011 at 11:03 AM, Kostya Vasilyev kmans...@gmail.comwrote: I didn't say anything about a thread - in fact, my recommendation is to not use a thread just for scheduling stuff (although that Thread.sleep() can look so tempting...). As for Handler messages not firing when there aren't any activities on the screen - that's simply not true. The event loop continues to run. There may not be any messages to deliver, but the loop is there ready to do work if needed, just like Binder threads. I posted a simple test a couple of months ago that showed this. In fact, that's how component callbacks are delivered, including those to services and receivers. -- Kostya 2011/6/12 Indicator Veritatis mej1...@yahoo.com O...K..., now that we have that clarification, is there anytime that the Activity will be paused or stopped (i.e. onPause(), onStop() called) when you DO want the timer thread to fire anyway? If the answer is 'no', then follow Kostya's suggestion, killing the thread in either onPause() or onStop(). If the answer is 'yes', then things get more complicated: I suggest putting the timer thread in a Service, not an Activity, sending a message to the UI Thread when it fires. Then that Thread will display only when it is in the foreground. But then you will probably want special logic to handle stale messages when the UI Thread executes onResume(). After all, sendMessageAtTime() and sendMessageDelayed enqueue the message at that time: they make no guarantees about when the Handler Thread will finally actually - process- the message. If the Thread has all activities paused, then that will be delayed until the right Activity gets an onResume() callback. On Jun 11, 4:15 am, Droid rod...@gmail.com wrote: Thanks for your sensible suggestion. My sentence should have read 'I have a timer thread that should not bring an activity back to view after the home button has been pressed but it does.' On Jun 11, 1:02 am, Indicator Veritatis mej1...@yahoo.com wrote: @Droid- You do realize, I hope, since it is the level of logic that should be easily expected of any programmer, that what you wrote here makes no sense. If, after all, on the one hand, My thread is a timer thread that brings my activity back to view after thehome buttonis pressed. then no, it makes NO sense to cancel it whenhome buttonis pressed. Besides: if it is a timer thread, shouldn't you really mean that it bring your activity back to view after the timer expires? It would make sense to cancel that timer when Home is pressed. And you can do that in onPause() or in onStop(). In fact, you should probably do that in onStop() no matter how you get there This would also simplify your code, since it is by design that the platform does not TELL you how you got to onStop(): it certainly does not tell you that it got there via a Home key. Also as has been pointed out many times now, overriding the expected result of the Home key is a really, REALLY bad idea. It is a good thing that the platform makes this difficult. It should not be done at all. Now I realize that some customers insist on this 'feature', even though it is such a bad idea. In which case, I pity you, but keep on slogging ahead. It is possible to get close to what you want, either with a custom Home application or some even more kludgy approach. But ignore Fung's suggestion, since he is dead wrong. On Jun 10, 8:52 am, Droid rod...@gmail.com wrote: My thread is a timer thread that brings my activity back to view after thehome buttonis pressed. I need to cancel it whenhome buttonis pressed. (I have 10 activities and no idea in which activity the app was when thehome buttonwas pressed) On Jun 8, 1:23 pm, TreKing treking...@gmail.com wrote: On Wed, Jun 8, 2011 at 1:34 AM, Droid rod...@gmail.com wrote: I have a thread that needs specifically to be cancelled when the home buttonis pressed. Perhaps if you explain why you think your thread needs to be specifically canceled on pressing Home you can get an answer that helps you fix your actual problem and not hack around it. --- -- TreKing http://sites.google.com/site/rezmobileapps/treking - Chicago transit tracking app for Android-powered devices -- You received this message because you are subscribed to the Google Groups Android Developers group. To post to this group, send email to android-developers@googlegroups.com To
Re: [android-developers] Re: How can I know when the home button has been pressed?
I didn't say anything about a thread - in fact, my recommendation is to not use a thread just for scheduling stuff (although that Thread.sleep() can look so tempting...). As for Handler messages not firing when there aren't any activities on the screen - that's simply not true. The event loop continues to run. There may not be any messages to deliver, but the loop is there ready to do work if needed, just like Binder threads. I posted a simple test a couple of months ago that showed this. In fact, that's how component callbacks are delivered, including those to services and receivers. -- Kostya 2011/6/12 Indicator Veritatis mej1...@yahoo.com O...K..., now that we have that clarification, is there anytime that the Activity will be paused or stopped (i.e. onPause(), onStop() called) when you DO want the timer thread to fire anyway? If the answer is 'no', then follow Kostya's suggestion, killing the thread in either onPause() or onStop(). If the answer is 'yes', then things get more complicated: I suggest putting the timer thread in a Service, not an Activity, sending a message to the UI Thread when it fires. Then that Thread will display only when it is in the foreground. But then you will probably want special logic to handle stale messages when the UI Thread executes onResume(). After all, sendMessageAtTime() and sendMessageDelayed enqueue the message at that time: they make no guarantees about when the Handler Thread will finally actually - process- the message. If the Thread has all activities paused, then that will be delayed until the right Activity gets an onResume() callback. On Jun 11, 4:15 am, Droid rod...@gmail.com wrote: Thanks for your sensible suggestion. My sentence should have read 'I have a timer thread that should not bring an activity back to view after the home button has been pressed but it does.' On Jun 11, 1:02 am, Indicator Veritatis mej1...@yahoo.com wrote: @Droid- You do realize, I hope, since it is the level of logic that should be easily expected of any programmer, that what you wrote here makes no sense. If, after all, on the one hand, My thread is a timer thread that brings my activity back to view after thehome buttonis pressed. then no, it makes NO sense to cancel it whenhome buttonis pressed. Besides: if it is a timer thread, shouldn't you really mean that it bring your activity back to view after the timer expires? It would make sense to cancel that timer when Home is pressed. And you can do that in onPause() or in onStop(). In fact, you should probably do that in onStop() no matter how you get there This would also simplify your code, since it is by design that the platform does not TELL you how you got to onStop(): it certainly does not tell you that it got there via a Home key. Also as has been pointed out many times now, overriding the expected result of the Home key is a really, REALLY bad idea. It is a good thing that the platform makes this difficult. It should not be done at all. Now I realize that some customers insist on this 'feature', even though it is such a bad idea. In which case, I pity you, but keep on slogging ahead. It is possible to get close to what you want, either with a custom Home application or some even more kludgy approach. But ignore Fung's suggestion, since he is dead wrong. On Jun 10, 8:52 am, Droid rod...@gmail.com wrote: My thread is a timer thread that brings my activity back to view after thehome buttonis pressed. I need to cancel it whenhome buttonis pressed. (I have 10 activities and no idea in which activity the app was when thehome buttonwas pressed) On Jun 8, 1:23 pm, TreKing treking...@gmail.com wrote: On Wed, Jun 8, 2011 at 1:34 AM, Droid rod...@gmail.com wrote: I have a thread that needs specifically to be cancelled when the home buttonis pressed. Perhaps if you explain why you think your thread needs to be specifically canceled on pressing Home you can get an answer that helps you fix your actual problem and not hack around it. --- -- TreKing http://sites.google.com/site/rezmobileapps/treking - Chicago transit tracking app for Android-powered devices -- You received this message because you are subscribed to the Google Groups Android Developers group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com 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 android-developers@googlegroups.com To unsubscribe from this group, send email
Re: [android-developers] Re: How can I know when the home button has been pressed?
You don't need a thread *just* to schedule an event. There is an easier way, which should also fit your number of activities better. 1 - This needs to be done in the code for each of your activities. Use a base class, or a delegate object. 2 - In onCreate, make a Handler object with an anonymous inner Callback (just like for setOnClickListener). http://developer.android.com/reference/android/os/Handler.html#Handler(android.os.Handler.Callback ) 3 - Define a what constant for a special message, which will be used by this Handler. Doesn't have to be a system-wide unique, in fact a zero will do. 4 - When you want to schedule a delayed task, do this: mHandler.sendEmptyMessageAtTime or mHandler.sendEmptyMessageDelayed with the what constant defined above. http://developer.android.com/reference/android/os/Handler.html#sendMessageAtTime(android.os.Message, long) 5 - In the handler's callback, check the what of the message, and do whatever needs to be done. 6 - In the activity's onPause or onStop, call this to remove all pending messages with that what value from the event queue: http://developer.android.com/reference/android/os/Handler.html#removeMessages(int ) If the operation you're going to perform needs an argument, obtain a message using this: http://developer.android.com/reference/android/os/Handler.html#obtainMessage(int, java.lang.Object) and post with this: http://developer.android.com/reference/android/os/Handler.html#sendMessageAtTime(android.os.Message, long) or sendMessageDelayed -- Kostya 2011/6/11 Droid rod...@gmail.com Thanks for your sensible suggestion. My sentence should have read 'I have a timer thread that should not bring an activity back to view after the home button has been pressed but it does.' -- You received this message because you are subscribed to the Google Groups Android Developers group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
Re: [android-developers] Re: How can I know when the home button has been pressed?
But he probly needs to make a political irritation screen for the department of grope safety. With a casino link. -- You received this message because you are subscribed to the Google Groups Android Developers group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
Re: [android-developers] Re: How can I know when the home button has been pressed?
On Wed, Jun 8, 2011 at 2:01 AM, Andy Fung tsf...@gmail.com wrote: if(keyCode == KeyEvent.KEYCODE_HOME) http://developer.android.com/reference/android/view/KeyEvent.html#KEYCODE_HOME This key is handled by the framework and is never delivered to applications. Please read the documentation, test your code, and verify it actually works before posting misinformation. - TreKing http://sites.google.com/site/rezmobileapps/treking - Chicago transit tracking app for Android-powered devices -- You received this message because you are subscribed to the Google Groups Android Developers group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
Re: [android-developers] Re: How can I know when the home button has been pressed?
On Fri, Jun 10, 2011 at 10:52 AM, Droid rod...@gmail.com wrote: My thread is a timer thread that brings my activity back to view after the home button is pressed. I need to cancel it when home button is pressed. Let me get this straight - I run your app then press Home to do something else, then at some random point you pop yourself back up on my screen? Uh ... why? I'm sorry but none of this makes any sense to me. - TreKing http://sites.google.com/site/rezmobileapps/treking - Chicago transit tracking app for Android-powered devices -- You received this message because you are subscribed to the Google Groups Android Developers group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
Re: [android-developers] Re: How can I know when the home button has been pressed?
To add to that you are also saying that while using your app I might have to go back through 9 activities to get to my home screen??? Then on top of that you want to disable the home button, my only means of NOT going through 9 potential activities *obviously I could also pull the battery* You might wish to reconsider your programming techniques! -- You received this message because you are subscribed to the Google Groups Android Developers group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
Re: [android-developers] Re: How can I know when the home button has been pressed?
No sense pulling the battery if the application also intercepts boot_completed :) 2011/6/10 rich friedel rich.frie...@gmail.com To add to that you are also saying that while using your app I might have to go back through 9 activities to get to my home screen??? Then on top of that you want to disable the home button, my only means of NOT going through 9 potential activities *obviously I could also pull the battery* You might wish to reconsider your programming techniques! -- You received this message because you are subscribed to the Google Groups Android Developers group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com 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 android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
Re: [android-developers] Re: How can I know when the home button has been pressed?
Argggh You sir are evil LOL :) -- You received this message because you are subscribed to the Google Groups Android Developers group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
