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I have "match_parent" in mine and it works fine.
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Are you using Eclipse or Android Studio? If the former, are there any syntax errors (red X on the left side) with that XML file?
Also, should tools:context be "com.example.mysecondapp.MainActivity" instead?
"One man's wage rise is another man's price increase." - Harold Wilson
"Fireproof doesn't mean the fire will never come. It means when the fire comes that you will be able to withstand it." - Michael Simmons
"You can easily judge the character of a man by how he treats those who can do nothing for him." - James D. Miles
modified 3-Nov-14 23:08pm.
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I use Android Developer Tools which is basically Eclipse from what I can understand.
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I think David's second suggestion may be worth looking at.
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hi
how can i record screen in android?
for example i want to record all user activity in screen such as playing movie or read sms or ..., i want to the code(app) record all activity in video format
thank you all
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Hi all;
I must start this discussion with three statements.
(a) I am one of those who learns by doing
(b) I have a basic understanding of Android programming
(c) I am a .NET developer (ie: I know how to program).
What I seek is advise on how to go about developing an application I have in mind. This application will be running in the background (therefore a Service) periodically polling a URL to check for new messages. If a new message is found, a notification or toast is displayed. So far, so good. I think I know how to do all that. The service will start automatically at device boot up. This, I think, I have also found how to do.
The problem I have is that as part of the same application I want a UI which the user can then use to process the received message/s. How do I go about implementing this within the same app.
The aim is to have ONE installation package.
I do not think what I seek is rocket science. I would appreciate any notes or links to relevant guides or tutorials.
Regards
Eric
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I'm not entirely clear what your question relates to. Are you asking how to build the UI or how to process the received messages? Can you clarify what you need help with. What are you trying to achieve?
"There are two ways of constructing a software design: One way is to make it so simple that there are obviously no deficiencies, and the other way is to make it so complicated that there are no obvious deficiencies. The first method is far more difficult." - C.A.R. Hoare
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Hi Dominic;
What I need to know is how to build ONE application that starts automatically as a service, but has a UI which the user will use when the service raises a notification. Which activity will have broadcast, be a broadcast receiver, etc....
Thanks
Eric
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Create an Android Application project, register a Broadcast Receiver with action android.intent.action.BOOT_COMPLETED in the Manifest file.
<receiver android:name=".MyReceiver" >
<intent-filter>
<action android:name="android.intent.action.BOOT_COMPLETED" />
</intent-filter>
</receiver>
Then start the Service from the onReceive() method of the Broadcast Receiver.
public class MyReceiver extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
Intent i = new Intent(context, MyService.class);
context.startService(i);
}
}
Create an Activity with the desired UI and pass that Activity as Pending Intent to the notification.
Intent intent = new Intent(this, MyActivity.class);
PendingIntent launchIntent = PendingIntent.getActivity(context, 0, intent, 0);
When the user taps on the Notification, the Activity used to create the PendingIntent is started.
P.S. - You can have Service, BroadcastReceiver and Activities all in one project.
modified 27-Oct-14 14:11pm.
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I've done something similar that may give you some ideas.
The application I worked on previously polled for updates from a web service. The class that did this background polling was based on the Service class. When a data update was detected from the web service, it would populate the database with the new data.
Do you know what your trigger is? You mentioned that you are polling a URL? Are you polling a web service for updates then? How do you know when you need to trigger your UI?
"There are two ways of constructing a software design: One way is to make it so simple that there are obviously no deficiencies, and the other way is to make it so complicated that there are no obvious deficiencies. The first method is far more difficult." - C.A.R. Hoare
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Hi;
The trigger will be a field in the data received from the webservice. When a trigger is received, a notification/toast will be displayed and then it is up to the user when to open the UI to check the full details what was received. Like the GMail app: you are notified when an email is received but you decide when to open the app to read the email. That part I have it sorted and planned and is something I had implemented on Windows Mobile (in another life).
What I need to know are the steps (and Objects to inherit from) required to do it in Android. My mind is not yet clear about the intents/broadcasts/etc....
Thanks again.
Eric
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Presumably then when the user sees that they have a new notification, they open your app to view the details. So it should just be a case of invoking your UI and displaying the most recent notification. Maybe you could add a flag so you know which notifications have been opened / read, and highlight those in some way.
I'm not sure what data you are displaying, but maybe you could display your data in a grid format, in which case you'd need to define an Adapter. I wrote an article about Android adapters that you may find useful Displaying Data with an Adapter in Xamarin.Android and Visual Studio[^]
"There are two ways of constructing a software design: One way is to make it so simple that there are obviously no deficiencies, and the other way is to make it so complicated that there are no obvious deficiencies. The first method is far more difficult." - C.A.R. Hoare
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Hi Dominc
That is Xamarin. I am trying to keep to Java and basic Android for now.
Thanks
Eric
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I know you are using Java but the classes / objects are the same. Only the syntax is different, but Java and C# are similar enough that you should be able to leverage my example code into your own application.
"There are two ways of constructing a software design: One way is to make it so simple that there are obviously no deficiencies, and the other way is to make it so complicated that there are no obvious deficiencies. The first method is far more difficult." - C.A.R. Hoare
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Ah! Then I must say thank you.
Eric
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Hy !
Im working on a tic tac toe game ..
when i press a button I check if the button is free if is free i set the buttons backround to an X.. with :
btn.setBackgroundResource(R.drawable.xpic);
afther this i call a method wich is the "Computer Turns" methot .. now my question is :
Is there any solution to set the picture bifore the mobile phone reach to en of code in "OnClick" ?
for example:
btn.setBackgroundResource(R.drawable.xdraw);
if(checkifwinner()) return;
turn++;
computerTurm();
there is a lot of code in the checkifwinner() because if wins then comes up a dialog.. and i dont want to wait till the dialog pups up.. how can i resolve this problem ?
Thanks a Lot.
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i want to make a app which shows desktop of pc on my android phone, so what should i do?.. i don't know how i can send and receive data request for sharing of a servers desktop on the clients(i.e. phone) screen.
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I'm developing an app for my tablet that is to turn on the screen when I rotate it to the vertical (the power switch is dodgy). It has an optimization to turn off the sensor from 22:00 to 06:30. The app works most of the time. However sometimes it fails. For example this morning I picked it up at 07:10 and the screen came on as expected. I put it down for about a half an hour and when I picked it up again it did not come on. I plugged in the power and it came on. I stopped my service and restarted it then and it has been running fine: pick up and it comes on when the screen has gone off.
Looking at the logs I see that the system stops the service frequently(maybe every 30 minutes) and then restarts it, passing a null intent to the onStartCommand() method. I've used SharedPreferences to save the app's state and am able to successfully restart the app where it needs to be.
My question: why didn't the app work this morning after it had worked on the first pickup of the morning? Any ideas on how to debug this or any work-arounds?
It's a very elusive bug. The code works so many times and fails so few times that I'm not able to come up with a debugging scheme to find out a reason or pattern for the failure.
Do you have any suggestions?
Something I've observed by looking at the logs is that the system restarts my service (passing a null intent to the onStartCommand() method) very soon after I have plugged in the tablet to turn on the screen. How would a bug in my code cause that?
Another observation: the system often restarts my service 5 seconds after the AlarmReceiver is supposed to receive an alarm: at 22:00:05 for an alarm set for 22:00:00.
Also posted at: http://www.codeproject.com/Questions/826395/Service-not-always-restarted-on-ASUS-tablet?cmt=683080#cmt2_826395
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Quote: the system stops the service frequently(maybe every 30 minutes) and then restarts it, passing a null intent to the onStartCommand() method
Instead of returning START_STICKY from onStartCommand try returning START_REDELIVER_INTENT. This will ensure that the system redelivers the initial Intent that was passed to the service when the service was started.
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Thanks for the response. The null intent is not the problem. The code saves the data from the original intent and uses the startId value to recognize that is has been restarted.
The problem is that my service is NOT being restarted promptly or some times not at all.
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As you have mentioned that it is being killed frequently, it seems that the device is running low on resources and in such a case the system will not restart the Service until adequate resources are available.
Try running the service in Foreground and see if it helps.
However, if your device is running Android 4.4.2 then it's a known issue - https://code.google.com/p/android/issues/detail?id=63793[^]
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