I am creating a simple Android widget with a typical usecase of having many instances of it running at once.
Using the stock preferencesmanager, it seems each instance of the widget shares the same preferences.
Is there any way to not have this happen?
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Say that there is an App Widget that shows a configuration Activity when placed. The configuration page allows adjusting the appearance of the widget.
The user may place multiple instances of this widget on their home screen. What would be the best way to maintain the unique configuration states on each of the widget instances? Or would each widget instance have to adopt the same global state?
I am using a PreferenceActivity to let the user set some values. I am feeding it the xml file with the defined preferences.
I have set all the android:defaultValue="" for them.
When I start my application, I need the preferences, or if they are not set yet manually, I want the default values:
CODE:.................
However, when android:defaultValue="true" I still get false. So, it looks like the defaultValues set in the XML are not used anywhere but when initializing the preferences-screen.
I don't want to hardcode the default values in the getBoolean() method. So, is there a way get the default-values with only defining these in 1 place?
My application is used on multiple platforms so it saves it preferences to a file (rather than to the standard Android SharedPreferences).
Is there any easy of reusing the PreferenceActivity to save preferences to a file or is it a case of creating a whole new activity to do the job? If the latter is the case is there a layout I can use that will make the activity look like the normal preferences screen? PreferenceActivity uses com.android.internal.R.layout.preference_list_content but this doesn't appear to be available to apps for reuse.
My android application has two kinds of preferences:
1) I have user preferences defined in res/xml/preferences.xml so that users can manage their preferences with a PreferenceActivity.
2) I'd like to define another file for global configuration preferences of my app.
What is the best way to manage my app config preferences? Should I create another XML file with config values or should I specify those config values in strings.xml? What is the best practice for managing config preferences?
Just picked up my incredible, and I have two questions....
1. how do i change the email notification to a specific sound? As of rite now, when i receive an email nothing happens (no sound or vibrate).
2. How do I select a specific ring for mms. I know how to select sms, but I cant figure out how to change the mms.
I am attempting to add a simple preferences file in a new Android project (New -> Android XML File), but it doesn't appear to be working correctly.
There is no root element to choose from when I select the Preference type layout. If I press Finish, it doesn't do anything. See screenshot below.
I have had androids for over two years now and am getting more and more concerned every time I download an app and seeing that it wants to READ my SMS message and Contacts.
Is there a way I can disable reading of SMS messages or any one of the other permissions by specific apps, or all apps?
Are we living in a world where any "joe schmo" can upload an app the to the app store and wait for those inadvertent downloads and collect all your personal information, and that's after all the time we spend protecting our identity and personal details?
My application has 2 activities. The main activity will create the "child" activity through startActivityForResult((...). When the child activity needs to exit, it calls setResult(..) and finish(). Child activity will start and exit multiple time upon user selection. The activity are start and exit as expected and onAcitivtyResult(..) also got invoked.
However, I found a problem with child activity, when the child activity was created the second time ( Main activity called startActivityForResult(...) upon some user event ), a new instance of child activity was created, but the displayed is the FIRST instance child activity! ( so any state in second instance of child activity was not accessible ). The onKey(...) was always go to first instance of child activity. Make things more interesting, the getInstanceCount () returns 3.
I have checked the code and no where holds the first instance of child activity which should be garbage collected after finish().
Is there a way to prevent the user of opening more than one instance of my application?
For example: User clicks on App and opens it. The user clicks on the home button. (the app is still running in the background) The user clicks on (not the menu button, but the button above it in the homescreen), and then opens the application again. Does it open the same instance, or does it create another one? If it does create another one, how can I prevent it from creating another one, and just opening the existing instance?
Is there a way to get an instance of the activity that has called the currently running activity from the intent object that has been passed to it? eg. if A has called B, I would like to retrieve A's instance from the intent in B's onCreate method. As Activity is not Serializable i am not able to pass the instance in the extras bundle.
View 1 Replies View RelatedI have two activities.A and B. A starts B.Both are running in the screen and both are visible. Say now B is visible.
On a special key press, I want to bring the A to the front and make it active. The problem I am facing is when the special key is pressed, another instance of A is launched and the new instance is brought to the front.
But I want the original A to come to the front. I want to make this change in the framework layer rather than application specific by using the singleInstance theme in the launchMode in AndroidManifest file.
Is there a way to know if there is an instance of your widget currently on the homescreen? I always end up using variables that change state with onUpdate() and onDeleted() calls, but that obviously that isn't effective in every scenario.
View 9 Replies View RelatedI have referred the example given on: http://goo.gl/1uxXv , But it is not showing the exact DatePicker dialog as given in the book example, what i should do to display the same dialog box or Calendar instance in my application ?
View 4 Replies View RelatedIm creating a mail application, where i need to start a service instance for every account, which will check for the new mails for that account. Now my problem is that i want to identify how my service i have created so far (by calling startService()). And also i want to stop a specific instance of service. I know that calling stopService() will stop all the instances of that service. Is there any work around to it.
View 2 Replies View RelatedI am trying to do the following.
I have an Image viewer where in the user picks an Image from within the gallery. The uri to that selected Image is available to me. Now, I want to use this URI information and send it as a file over a socket using FileInputStream. Is this a valid syntax to perform the above action?
CODE:..............
I have a bunch of tab activities (which I implemented myself, didn't want to use the tabviews with activities inside them), so It's basically 5 activities calling each other every time the user clicks on the tabs displayed as a row of LinearLayouts at the bottom of the screen.
The thing is that the way I do it now, everytime the user jumps from one activity to another, a new activity is created and launched. Of course, I can see I'm wasting resources this way. So what I would like to do is to create every activity only once; and then if the user wants to go back to the previous (or any one that was already created and is probably paused) just check on some kind of list or array to see if the activity can be recovered and only in the case it can't; to lauch a new one.
My question is, how can I check this? should I save the intents? and how to recover the activities afterwards? I'm kind of new with java.
I'm trying to obtain an instance of ServiceState in my Activity. But how am i supposed to do this? There is no static method to obtain an instance or any method on any service that returns an ServiceState instance.
There is the TelephonyManager.listen() call. But i want to get the ServiceState instance when i want, not when android calls my listener because something changed.
The documentation of ServiceState can be found here: http://developer.android.com/reference/android/telephony/ServiceState.html
Is there any way to get the instance of a launched activity(or any view in that activity )of a application in another application.
View 1 Replies View RelatedWe all know that hitting the back button on the device doesn't kill the application, it merely finishes (destroys) the activity running on the foreground.
Well I have come across some code which helps me capture the back button signal so that I cannot exit the application. The only way to exit it in such cases is to press the home key.
Now this situation presents me with a unique disadvantage! The inability to kill finish the application on a time of my own choosing allows the application to keep running in the background like nothing has changed.
So in such cases is the task manager my only friend or is there a way for me to otherwise kill this application?
I need to save some state when the user leaves my game during game play. Saving the state doesn't seem to be an issue, but I can't figure out how to restore it. The onCreate function isn't called when the Activity is resumed (only when it is first created), so I can't get my state back there. Logically, I would use onRestoreInstanceState, but it isn't being called.
CODE:..........
I see log output from onSaveInstanceState, onResume, onCreate, etc, but I never see a log message from onRestoreInstanceState and savedState is always null. Why isn't onRestoreInstanceState being called, and is there another way to get my state back?
How can I make sure that only one instance of Service is created?
I have checked some functions with logging (WeatherService is the class who extends Service):
CODE:........
It gives different hash codes even when I am sure that the same function is running twice (downloading):
CODE:............
I am binding a Activity to the service with:
CODE:.......................
And the service can run for minutes until it is completed, therefore the service can be binded to/created by many Activities.
I have a audio player app, where there is a Main activity that shows 3 audio sample urls. On click on one, it goes to a Details Activity, which has a play and pause button, to start and pause the audio.
My problem is that, when I start the Main activity, and say click on audio 1, I hit play on Details activity. This starts the MediaPlayer and the audio starts to play. When I go back to the Main activity, the audio is still playing, which is what I want. Now, when I click on audio 1 again, and go to Details Activity and hit play again, there seems to be a new MediaPlayer starting the audio. So I have 2 tracks playing together!
Is there a way I can have only one MediaPlayer instance at any given time?
I have a service running in background. I start it from an Activity, but i want to recovery an instance of that service from other activity (in the same app) in order to call one method.
View 1 Replies View RelatedI'm starting a service in my application using startService.
I do not want to use bindService as I want to handle the service life time myself.
How can I get an instance to the service started if I do not use bindService? I want to be able to get a handler I've created in the service class to post messages from the activity.
I have Class in having an abstract class object as a field in JAVA layer. I want to set this field From Native code C++. I am Trying to use SetObjectField() to set, but it does not work out. Does anyone try this before or know who to do it please shed some light on it.
View 2 Replies View RelatedI need to get the absolute path of the file associated with a specific android.net.Uri instance. I know how to get the URI instance based on the file instance (with Uri.fromFile(file)) and i need the inverse action.
View 4 Replies View RelatedI have few question in application side. Questions are below 1. Can LMK (Low Memory Killer) kill service ? 2. Can I open multiple instance of same applications ? 3. Can I set the priority for the application? 4. LMK kills application(process) or one activity(suppose in application 4 activity). If it can kill activity then how activity stack handling this.
View 3 Replies View RelatedHow can i save a Bitmap instance to a *.bmp file?Anyone knows? Is it strange that we can only save a bitmap instance to a png or jpg file?
View 7 Replies View RelatedI'm currently implementing some image processing code for Android. I'm aware of the memory limits and am happy to code within them. However, I cannot find any documentation that lets me work out how many bytes are used for each instance of a given class that I might want to instantiate (on the heap). I'm an experienced C++ programmer and so am relatively competent at working out such struct/class sizing issues for my C++ code (taking into account processor data path width, platform alignment issues etc). I know that Java in general is at a higher level of abstraction and so that I may not be able to guarantee particular memory usage for a general Java VM. However given that android is running on a different VM, and given that developers are strongly memory constrained: I'm assuming that there may be a relatively deterministic set of rules for working out how big a given object instance will be, given knowledge of the members.
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