I have been looking it up and I just cant seem to wrap myself around the onCreate and Bundles. I understand that the onCreate is called when the program starts but its how the Bundles get passed around and how they are pertinent. Can anyone try to put this into plain english because I cant seem to find it well described.
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was wondering about the behavior of Bundles and serializable objects. If I put a serializable object into a bundle, what is serialized then, the reference to the object or the object itself? I always assumed that the object itself would be serialized to a byte stream when calling putExtra() and re-created from that representation when calling getSerializableExtra(), but I recently stumbled upon a piece of code that put an entire view into a Bundle in thread A, retrieved it from that bundle in thread B, performed a modification on it and this modification actually became visible. This can only happen if the reference to that view was stored, not the view itself, right? Otherwise, the modification had been applied to a copy of that view and would be meaningless.
View 3 Replies View RelatedI would like to know if someone can explain what exactly "google voice" is, and how it works.I have t-mobile unlimited calling plan, so minutes don't really matter to me.I am just not sure what google voice is or does.
View 29 Replies View RelatedLets say that I have an app that lets you browse through a listing of cars found in a Sqlite database. When you click on a car in the listing, it'll open up a view with the description of the car and a photo of the car.My question is: should I keep the photo in the database as a binary data column in the row for this specific car, or should I have the photo somewhere in the resources directory? Which is better to do? Are there any limitations of Sqlite in terms of how big a binary data column can be?The database will be pretty much be read only and bundled with the app (so the user wouldn't be inserting any cars and their photos).
View 2 Replies View RelatedIs there any way to pass values(strings or bundles) to another application while calling it via intents, and also return some information (mostly string)?
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View 7 Replies View RelatedHowever, the documentation doesn't explain any of the parameters. All of them are pretty obvious except for boolean filter. Does anyone know what it does?
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View 1 Replies View RelatedI called canvas.drawBitmap to draw an image, but somehow it's showing up behind/underneath the custom view (or it's background). can someone explain this?
View 1 Replies View RelatedOk I'm asking this in regards to my battery life. There is a 3G icon at the top. Next to it has an up and down arrow. Next to that is the bars. I'm new to all this because I've never had a smartphone so no flaming, lol.
Sometimes the 3G icon will go from lit up to dark. Does that mean it is connected, gets disconnected and tries to find a signal again? And sometimes one the arrows are lit up and the other isn't, sometimes they both are lit and sometimes neither. Is this something to do with data being downloaded and uploaded by the phone through the network?
Thanks.
anyone buy one of these bundles on ebay for like $20? i missed out on the Droid35 vzw deal in february and now i want a dock for my car. like one of these FOR MOTOROLA DROID A855 6 ACCESSORY BUNDLE CASE+CHARGER - eBay
View 8 Replies View RelatedI have a little doubt, I spend data from Activity A to B with a bundle in the intent.Where I should declare the keys? In Activity A or B? Only to avoid confusion, I'm talking about the string that defines the data that will be set in the Bundle.Ex: public static final String KEY = "MyKey";
I declare always in the Activity A, but I think that if I could let all the keys in a file would be better, like keys.java or something like that.Obviously, this is nothing that is generating errors, just a doubt about convention, a thing that I consider very important in software development.
Going from hero->evo means my mini usb cords are useless. I'm looking around but can't seem to find anyone selling a bundle of maybe 4-5 cords, they seem to all be selling individually along with car/wall chargers (which i won't need)
View 5 Replies View RelatedWell I saw the thread in here about tethering and trying to fix the speed problem. I did not want to high jack his thread with my question so I made my own thread. Can someone please explain tethering to me?
View 49 Replies View RelatedYesterday, according to the internal memory widget, I had used up 143mb of my allotted 159mb. Needing more space, I uninstalled two apps, (Paper Toss and PDF Viewer) that were about 3MB each. I also cleared my dalvik cache. My phone was then down to 136MB used. Today, my phone is back up to 143MB used. I haven't installed any apps since yesterday. What happened to those 6MB that I freed up?? (Rooted and running Fresh 2.0d and I am not using apps2sd)
View 12 Replies View RelatedI know everything is just starting to come together but is there a guide available that explains the rooting process? Even if it isn't specific to the X I would like to learn more about what I'm doing before I start following any step-by-step procedures.
View 1 Replies View RelatedIf I attach an object to a bundle and store the bundle in an intent and start another activity, does that activity work on a copy of the original object or does it use the same object but just passes along a pointer?
View 1 Replies View RelatedCan anyone explain the question mark means in Android XML attributes?
<TextView style="?android:attr/windowTitleStyle" More attributes/>
My prob is the following: My android application has the class TestActivity (entrypoint) -my app uses "library.jar" wich contains J2ME classes, used as library -library.jar also includes "UIActivity" [can spawn several dialogs] wich is called by a (j2me) class of library.jar -I only have the .class files of the j2me-lib stuff, so I cant modify them, but I can do so on Android-classes
so... the short form:
CODE:.............
finally I get the error:
CODE:.............
Do I have to use Services instead of Activities? But afaik I have to give a reference of an activity to spawn dialogs.
Leaving aside the lamentable wording of the documentation for this method, it's not really acting as I hoped for an ImageView. I call toggle() from the onClick method of the view but the view system does not redraw my drawable with the checked state. However, if I initialize CHECKED_STATE_SET with android.R.attr.state_checked then the view is draw with the checked state.
So apparently my call to setImageState is not updating the state of the ImageView. The documentation for setImageState is totally blank in the case of an ImageView. What does this mean?
Here's my code:................................
I have an activity that checks stuffs online when it's created (is the GPS on and if not it asks if the user wants to turn it on).
The problem I'm having is that it is also doing it everytime I change the orientation of the screen.
I've read some comments on onConfigurationChanged() but is there a better way to be sure I'm checking the GPS only when the activity is first created?
I try to call inside onCreate() it is ok but not onClick(). How to make it work?
View 3 Replies View RelatedI'm having a hard time resolving a crash report. It's an OutOfMemory exception that occurs during the setContentView in the onCreate of my main activity.
I just want to be sure I understood Android LifeCycle well :
1) The onCreate of my main activity is called once and only once during the life time of my application ? Is that correct ?
2) Just like for the big bang, before the oncreate of my activity, nothing exists for that activity, so memory consumption is zero, no objects exists right ?
So what can cause that sometimes, with random framework and devices, I get an OOM exception ? I mean if say my background image is causing this, it should blow up everytime, on every device, shouldn't it ? I mean the result should be reliable.
The background image is a standard jpg : 360*480 weighing 37kb, nothing fancy really :s
The crash report below :
CODE:.....................
I'm opening an Activity using this:
startActivity(new Intent(Parent.this, Child.class)); And on the child, I have this code on the onCreate function (the if contains more than just true, of course): public void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState); if (true) { AlertDialog.Builder builder = new AlertDialog.Builder(this); builder.setPositiveButton("OK", null); builder.setTitle("Error"); builder.setMessage("Connection error, please try later.") .show(); finishActivity(0); return;}}
Why is the activity not closing? I get the alert box, but then I have to tap the "back" button to go back.
CODE:.......
Phone was an HTC My Touch. I got the prompt to choose what activity, browser or youtube, chose youtube.
I understand that Android Activities have specific lifecycles and that onCreate should be overridden and used for initialization, but what exactly happens in the constructor? Are there any cases when you could/should override the Activity constructor as well, or should you never touch it?
I'm assuming that the constructor should never be used because references to Activities aren't cleaned up entirely (thus hampering the garbage collector) and that onDestroy is there for that purpose. Is this correct?
I am making twitter application in which i open browser for user authentication and i pass call_back URL when launching authentication browser.
Problem is after authenticating it is calling again oncreate of TWitterShare class instead calling onNewIntent method, why is that ? my another class working fine i am unable to find difference any idea by looking at the following ocde why it is calling oncreate again ?
CODE:...................
I got this class, and nothing inside the onCreate is happening? Does it not automatically get called upon initialization?
Code is below.
CODE:......................
Doing this results in a "application has stopped unexpectedly. Please try again". If I initialize the string to some set of characters instead of null, it'll just stay that way. Should it not do what is inside the onCreate() and make that change?
I know that network activity and expensive operations should not be done on the ui thread, but what about database activity?
I have an activity that, when started, I query an sqlite database and dynamically populate rows in a tablelayout with an inflator. I do this all in the oncreate() method. Should this be done in a separate thread?
What is the lifetime of a ContentProvider in Android? After onCreate() is invoked, will the ContentProvider persist unconditionally for the lifetime of the process?
My ContentProvider manages a list of records, but only 1 is designated "active" and will be accessed by different applications a lot. I was wondering if it's safe to cache the index of this active record in memory as a member of my ContentProvider to speed up lookup.