I have a bunch of objects that implement Serializable that I want to store in a SQL database.
I have two questions:
Is there a way to serialize the object directly into the database. Is that the best way to do it or should I Write the object out to a formatting String and put it in the database that way and then parse it back out
Write each member to the database with a field that is unique to each object.
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Why does Android provide 2 interfaces for serializing objects? Do Serializable objects interopt with Android Binder and AIDL files?
View 1 Replies View RelatedI have problem with a class i want to pass in an intent by putting it into the putExtras()
Its serializable and the code looks like this:
CODE:................
The problem is, that y now is an ArrayList and no longer an ObjectB so i cant cast it..
if i change the code to
CODE:................
It works fine.
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 have passed one multi-dimensional array to another activity using putSerializable() and retrieve using getSerializable. But I got some problems.
First activity
CODE:.................
Second Activity
CODE:.................
When I am running my application, my application is suddenly stopped. Is this the right method to retrive the String array?
In my application, I am trying to pass a serializable object through an intent to another activity. The intent is not entirely created by me, it is created and passed through a search suggestion.
In the content provider for the search suggestion, the object is created and placed in the SUGGEST_COLUMN_INTENT_EXTRA_DATA column of the MatrixCursor. However, when in the receiving activity I call getIntent().getSerializableExtra(SearchManager.EXTRA_DATA_KEY), the returned object is of type String and I cannot cast it into the original object class.
I tried making a parcelable wrapper for my object that calls out.writeSerializable(...) and use that instead but the same thing happened.
The string that is returned is like a generic Object toString(), i.e. com.foo.yak.MyAwesomeClass@4350058, so I'm assuming that toString() is being called somewhere where I have no control.
Some of my code
CODE:.........
This is in the activity that receives the search suggestion:
CODE:...........................
I'd like to send an sms message. If the text is too long, I split it into multiple messages. I'm trying to put some extra info into the "sent" intent to know which part has been sent, and when all the parts are complete: The message is sent, and I catch the intent when each part is sent - but the intent always has the same data in it. For example, "partIndex" is always zero, even though for the second message, it should be one. Seems like the same intent just keeps getting thrown to my broadcast receiver. What's the right way to do this?
View 1 Replies View RelatedI'm still trying to figure out how best to layer views on top of other views. I want to do something like the ZoomButtons on top of a custom view. I tried getting the ZoomButtonsController's parent and then adding views, but I didn't have enough control and they ended up on top of the buttons. I've gotten close by using a FrameLayout and some gravity on the top two views. But this has some interesting effects. Since this is contained with a tab, these two top views appear on top of all four of the tab pages. I want them on top of one of those pages only. Apparently, nested FrameLayouts don't mix well. What is the proper and expected way to do this? Here is more or less my complete layout....................
View 4 Replies View RelatedI have gotten through signing up as an Android developer, joined Android Market, and recieved and activated my Android Developer Phone.I have my first draft application running in the emulator.The documentation suggests testing it throughly on the device, however, I don't want to put it up publicly in the Android Market until I am satisfied with the app.
1) Is there a way to privately post a testing app on Android Market? If so, would somebody please point this newbie to the HOW-TO?
2) Is there a way to push my app onto my developer phone without using Android Market? If so, would somebody please point this newbie to the HOW-TO?
I'm having more fun working with this Android stuff than I have had in years! As soon as I learn enough to contribute I'm going to be overjoyed to share it.
Is it possible to draw a border around a textview?
View 3 Replies View RelatedI'm trying to create a form like dialog to accept a few EditText and a spinner. Somehow I can display the spinner but then I start implementing the array and setOnItemSelectedListener it crash. Did I do anything wrong?
LayoutInflater inflater = (LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE);
final View layout = inflater.inflate(R.layout.generate_pwd, (ViewGroup) findViewById(R.id.generate_pwd));
final AlertDialog.Builder builder = new AlertDialog.Builder(this);
Spinner spin=(Spinner)findViewById(R.id.spinner);
spin.setOnItemSelectedListener(this);
ArrayAdapter<String> pwdTypeArray = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item, R.array.password_type);
pwdTypeArray.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
spin.setAdapter(pwdTypeArray); builder.setView(layout);
// Now configure the AlertDialog builder.setTitle(R.string.generate_pwd_title);
I'm trying to pass an object from an activity to another activity. In the first activity i do:
Intent intent = new Intent(this, SecondsActivity.class); intent.putExtra("package.class", SerializableObject);
And in the second activity:
Class object = (Class) extras.getSerializable("package.class"); objetc.modifySomething(2432);
Intent intent = new Intent(this, ThirdActivity.class); intent.putExtra("package.class", SerializableObject);
But if i modify the object in the second activity, it fails when i send this object to a third activity.Why does it fail? What am i doing wrong? I just need to pass objects between diferent activities because i have an object which contains many information, and creating a Boundle would be very big and ugly in my code.
When I add a new contact to my phone it doesn't show up in the contacts list. When I dial the number manually it shows the name of the person I am calling or that I added. Where is it putting my new contacts? Is there a group setting somewhere I missed?
I also noticed that all my numbers that were brought over from my old phone are listed twice when I go to edit a contact. They are only listed once when I look up a contact but under edit there are two screens with the same info.
I want to use the accessibility classes, but I'm a begginer in android programming and i can't understando how to use them. I don't find any example using these classes. Somebody can give me some use examples? Another thing Can I set enable the Accessility mode in the emulator?
View 2 Replies View RelatedI am writing a app, which has sort of plugin framework. public abstract class AbstractService {public abstract AbstractService getInstance(String name)..
View 2 Replies View RelatedI have an apk installed in /data/app. I want to use the class methods in there. Here is what I tried. code...
I got "ClassNotFoundException". By peeking into the apk, I don't see class files but classes.dex. I would assume SystemProperties class is in classes.dex. Why can I load it?
We are planning on this strategy to distribute our application to clients. We would like to get your your thoughts, if you have done something similar, in terms of whether we are missing something. We have tested this approach and it works.We want to distribute our application to our clients without putting it on the market as we do not want every one to download it. We want our clients to be able to easily get future upgrades to the application. Here is how we are planning to do this:
1. export the apk file using the Eclipse wizard.
2. put this apk file on a website. The user will be able to go to this website on the browser on the phone and install the 1st version of the app.
3. next versions of the app will have an incremented android:versionCode, and android:versionName in the manifest. A button in the settings will point to a link which will have the next version of the app. So to upgrade the user will click on this settings button and download the next version and click on the apk file to replace the old version.All subsequent versions of the app will be signed by the same certificate using the export wizard in Eclipse
My app seldom needs to put the device (or screen) to sleep. That is - programmatically imitate user pressing on red stop-call button. According to docs PowerManager.goToSleep() does just that, but requires android.permission.DEVICE_POWER, which is never granted to apps!
(A) What on earth should I do to get this working?
(B) How can I programmatically wake up the device.
just to clarify - I'm not interested in a wake lock solution.
I have a layout file with 6 image buttons.Each button should show different source image based selection/focus/noselection.I am able to do this with 6 xml files under drawable folder with selector/item nodes.Is there a way to put all these selectior nodes in ONE xml file to accomplish the same.Less files means less management.
View 2 Replies View Related@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.my_list);
mDbHelper = new MyDbAdapter(this);
mDbHelper.open();
fillData();
registerForContextMenu(getListView());....................
The date is actually stored as an int in the SQLLite database, and thus it displays as an integer. Does anyone know a way to create a date from the int so it doesn't display as 1216544611 (or whatever) but as "12/11/2009 11:32"?
I am developing sample Video Recorder for Android.Following is My code snippet.
CODE:............
But when i am trying to run in eclipse,am getting following errors. MediaRecorder.VideoSource can't be resolved. MediaRecorder.VideoEncoder can't be resolved.
I am using android-sdk-windows-1.1_r1 as my android SDK,and didn update this from 1.0 instead i installed it freshly.
I guess there might be some problem with the SDK.
I am looking for the implementation of the IAlarmManager.I am interested in the scheduling done by the AlarmManager.setInexactRepeating method and so I started looking for the implementation but I haven't been able to find anything.Internally to AlarmManager, I can see that the actual work is being done by an android.app.IAlarmManager interface.After googling around for a bit there seems to reference to an implementing class called android.app.IAlarmManager.Stub but that is as far I get.I am working with Android 1.6.
View 1 Replies View RelatedI have an app I am working on and being new to Android Dev I am running into a situation. I have a Scores class not extended from anything (Activity,Service, etc) but in the same package that needs to access SharedPreferences
public class Scores {
Context ctcx;
public Scores(Context context) { ctcx = context;
}
I am trying to determine how to structure the code of a simple android game I am writing. I am focused on the UI portion. The behind the scenes portion (like a pause/restart/switching/etc) does not concern me. The Android demo games source code already do a great job with this. Essentially my game will need a UI with a series of objects on the screen (roughly 100 or 10x10) that the user can interact with. I need to supply an image for each object as well as implement the touch events and animation events for each object. What I am wondering is what type of class do I use for each object so that I can successfully implement these methods and how do I implement that particular class. Note that this game only executes on a user interaction with one of these objects, meaning I don't need a "real-time" implementation.....
View 2 Replies View RelatedI have read the Backward Compatibility Article, and I don't full understand how (or if I can) make a program backwards compatible if I want to use a class introduced in later versions. For example, I want to use WallpaperManager for apis 5+, but make the app as a whole compatible with api 3+. Is this possible?
View 14 Replies View RelatedSince i'm still new on Android programming, I have some problems on some issues. I have a QuadTree data structure implementation in 3 seperated Java files and i would like to use this data structure in my application. But i don't know how to use this .java files in an Android project. I tried to put them in a new Android project, just for testing, but I get lots of errors. Could anyone help me about using this java classes in my Application?
View 3 Replies View RelatedI have a class2 which is involved by class1 when clicks are made. I have to pass some parameters/objects from class1 to class2. I only know the standard way which does not have an option of passing parameters.
CODE:.................
How can I install java classes not included with android ?
Is it possible to add java.awt.image package into android?
Where can I find above package jar file?
This is a very weird problem. My app that runs just fine but somehow if I leave my phone for an hour or two while my app is running, I get the following error when I come back to it later:
CODE:................
I know for a fact that my yoga.database.Manager class was loaded at the time when the app was launched, but somehow the class must have been unloaded by the system as I left the phone.
Does Android unload classes automatically after certain periods? What can I do when my class gets unloaded? The above error causes my app to crash, but I can easily re-launch it and it runs just fine. The problem occurs mostly on my HTC Magic phone running Android 1.6.
I have a couple of third party classes which serve as a library I can build my application upon. They are contained in a folder which was added Java Build Path -> Libraries (in Eclipse) with "Add Class Folder". It works fine so far an my app compiles. But the produced .apk contains only my classes and therefore the application does not run. How can I tell Eclipse to package the third party classes into the .apk as well?
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