Android :: How To Obtain Subviews From Listview
Oct 1, 2010
My program will show data based on selection from two spinners (month and year). Based on month and year, it will query DB and displays the content in listview.
I created two spinners and populate with array string. Then I created two spinner views, two arrayadapters and set onItemSelected listeners and set adapter to the views. Then I use cursor to get query from DB, then put the result into simple cursor adapter and put them into list adapter. Finally I use list view to add this listadapter. Result shows properly. It is OK when the queries is not too much. But when there are lots of queries, it is difficult to see. So I want to implement paging for my program. For example: I get 100 queries, and I want to show them like 10 or 20 queries per page. I can control how many records per page via another spinner.
But the main problem is that I don't know how to get subset data or subview from return queries (listview).
Are there any methods in listadapter or android can do that ? I'm still new in android. I also read some documents about getView(), I don't understand and not sure whether it can help on my purpose.
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Jul 11, 2009
Is there a way to obtain a virgin map with the Google Map Api or other API (no city and country names, i want only country borders)?
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Aug 23, 2010
I would like to write an app on Android to upload my GPS location to an external website once every 5 minutes. This needs to have as minimal an impact on battery life as possible, but it also needs to work without any user interaction. (Background: I'm competing in an Ironman triathlon which will take me about 14 hours to complete, and want to broadcast my location in near-real-time but without having to worry about fiddling with my phone.) So my initial thought is to write a Service which uses LocationManager.requestLocationUpdates() with a minTime of 5 minutes, but will this actually wake the device up every 5 minutes for my service to do its job?
It sounds like I would also need to use AlarmManager.setInexactRepeating() to make sure my service is awake while it completes its task but how does that play with requestLocationUpdates()? Should I instead set minTime=0 on requestLocationUpdates() but then go back to sleep as soon as the next update is obtained? Any general guidance on how to design this. I'm a competent Java programmer & will be using Google Maps on the server to plot my location, but am pretty new to Android development so I'm basically looking for a high-level plan on how to architect the client app.
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Jun 26, 2010
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
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Jun 9, 2009
I wish to obtain the frequency of an input signal from the mic. Can anyone send me some pointers on how this may be accomplished.
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Jan 18, 2010
I'm trying to obtain the battery temperature, the battery voltage and the battery current. The return value of the code (see below) for voltage and batteryTemperature is always 0 while the others work. I would like to know if there's any other way of obtaining this information and how. Finally, I couldn't find anything in the API for accessing the battery current... Is there any method to know its value? Code...
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Jul 28, 2009
I have different text packaged into my app for different locale. The Resource.getString(int resid) method automatically returns me the string for the CURRENT locale of the phone. Is there a way I can specifically obtain resources while passing in a locale? For example, there isn't such method as: Resource.getString(int resId, Locale myLocale);
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Jun 25, 2010
I'm developing an image editor for android. In the main activity, I get to show all images by viewing the thumbnails to make the process faster. The problem it's that I need to process the image later and I would get the normal image ID (with the original size, which I think is in MediaStore.Images.Media). I can't get the form of the query. The code that I have is the following but I can't obtain the real image ID (in the IDImage variable) code...
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Jul 28, 2010
In the licensing documentation the android developers mention an easy way to more or less securely identify an android device. They are using android.Settings.Secure.ANDROID_ID.
They say they query the system settings for this. But they don't explain this any further.
How do I obtain the android_id and do I need special permissions for doing so?
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Aug 27, 2010
I have setup 2 test contacts in my emulator.
I'm running the following query, it should pick them both out, populate my domain object, and add to a list. The output at the bottom should therefore be 2, but it is 5, why is this? (cursor.getCount() is 5 instead of 2)
I have stepped through each iteration of the while loop and it is retreving the same contact multiple times, but with different values for POSTCODE, such as the phone number
CODE:..................
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Mar 11, 2010
I am porting a Python application to Android and, at some point, this application has to communicate with a Web Service, sending it compressed data. In order to do that it uses the next method:
def stuff(self, data): "Convert into UTF-8 and compress."
return zlib.compress(simplejson.dumps(data))
I am using the next method to try to emulate this behavior in Android:
private String compressString(String stringToCompress) { Log.i(TAG, "Compressing String " + stringToCompress);
byte[] input = stringToCompress.getBytes();
// Create the compressor with highest level of compression Deflater compressor = new Deflater();
//compressor.setLevel(Deflater.BEST_COMPRESSION);
// Give the compressor the data to compress compressor.setInput(input); compressor.finish();
// Create an expandable byte array to hold the compressed data.
// You cannot use an array that's the same size as the orginal because
// there is no guarantee that the compressed data will be smaller than
// the uncompressed data.
ByteArrayOutputStream bos = new ByteArrayOutputStream(input.length);
// Compress the data byte[] buf = new byte[1024];
while (!compressor.finished()) { int count = compressor.deflate(buf);
bos.write(buf, 0, count); } try { bos.close();
} catch (IOException e) { } // Get the compressed data byte[] compressedData = bos.toByteArray();
Log.i(TAG, "Finished to compress string " + stringToCompress);
return new String(compressedData);
}
But the HTTP response from the server is not correct and I guess it is because the result of the compression in Java is not the same as the one in Python. I ran a little test compressing "a" both with zlib.compress and deflate.
Python, zlib.compress() -> x%9CSJT%02%00%01M%00%A6
Android, Deflater.deflate -> H%EF%BF%BDK%04%00%00b%00b
How should I compress the data in Android to obtain the same value of zlib.compress() in Python?
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Nov 24, 2010
I'm trying to read the available home screen widgets list.
I can populate a grid using the available applications list using
CODE:.............
And than iterating through each ResolveInfo. How can I do the same with available Home screen widgets? I'd like to populate a grid with the same list that appears keep touching the screen and choosing 'widget' from the appearing popup.
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Aug 25, 2010
I had Sickipedia but had to restore phone. Now I can't get this app on the Market. Is there any solution for this?
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Oct 26, 2009
I am developing an application in which a user keeps on scrolling and each view displays a single text. The views are not suppose to end. How can i achieve that?
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Jan 13, 2010
I am trying to get the emails from a contact on Android (2.0.1). I canīt get the email. The code...
When I try to get the values of the columns, I get null. How can I obtain the emails? Maybe the CONTENT_URI is not correct or the data is stored in another table and I have to make a join.
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May 20, 2010
Does anyone know how to obtain the rounded rectangle effect from this picture? http://developer.android.com/intl/de/resources/articles/images/list_f...
Is it somewhere in samples?
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Jul 21, 2010
I am working on a little side project (program for Android platform)and I don't exactly have a problem, but I don't really know where to start. The project I am working on has to do with getting the info and manipulating a pixel's RGB values inside an image. I know this is a very basic program (not going to disclose all the information about the project), but I am a beginning android programmer.
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Nov 24, 2010
How can I get crash data (stack traces at least) from my Android application? At least when working on my own device being retrieved by cable, but ideally from any instance of my application running on the wild so that I can improve it and make it more solid.
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Nov 12, 2010
I'm using the following code from the apidemos..
CODE:................
Under /* User clicked Yes so do some stuff */, i'm not fed the isChecked variable.. however, I am given isChecked in the /* User clicked on a check box do some stuff */ section.. Obviously i don't want to update my SharedPrefs on checkbox click, in case the user hits cancel..So how do I get the checkboxs and values on the setPositiveButton onClick ?
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Nov 16, 2010
I want to get the current bitmap associated with my canvas so I can perform operations on it. I can't see how to do this though.
I've seen some examples where you create a bitmap and set the canvas to use this bitmap, so obviously you can then access it later, but I'm using the canvas returned from a SurfaceHolder so there's no constructor.
For instance, examples often show this kind of thing:
CODE:...........
So at this point I can see bmp.
In my case, the canvas is obtained by:
CODE:......
So how can I get the bitmap for c?
In short, my aim is to capture the current canvas contents where I have drawn "stuff", and make a copy of it, reversed, to put underneath. Like a reflection. The example of this that I found performed it all via bitmaps, so I assumed I needed to somehow capture the current canvas to a bitmap to then use it.
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May 16, 2009
I need to capture an image from camera and display on surfaceview for my project. I am trying to obtain bitmap from data in onPreviewFrame method of previewCallback and display on surface using canvas.
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Feb 5, 2010
Given a contact id, I can obtain various contact details (like name, phone, email-id, etc) by making different queries for a each of these fields. But is there a method to obtain all the details associated with this contact id by making a single query
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Sep 17, 2010
As a user, whenever I long-press home key, I get this 'recently used apps' list. As a developer, how do I fetch the same list programatically?
PS I am mainly a forum guy and this is the first time I'm using a mailing list, so very sorry if I don't post this in a proper way...
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Nov 13, 2010
I am developing an android application where i need to determine the free space available on the sdcard.
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Jun 2, 2010
does anybody know how to pro grammatically obtain the email address configured on an android phone? that is the one which was used to activate the phone?
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Oct 15, 2010
I'm trying to obtain my location using android 2.1 through "Provider_Network" but the problem is it uses both cell towers and Wifi Access Point. i only want to obtain my location through Wifi Access point and not through cell towers? any idea how to do it?
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Feb 25, 2010
I have an assignment to be completed. The assignment needs sms texting service facility in Roslien Font (for each English alphabet we have a corresponding alphabet in Roslien, something like Wingdings) for Android platform. On going through the posts available on different forums in INTERNET, I observed that in order to send a different language text, I need to send the sms as a unicode string. The problem is, I have no clue on how to obtain the unicode string for a completely new font , Roslien. I have a " .ttf " file for the font which as such which contains the alphabets in the language.
Please help me , how do I obtain unicode string for the particular font.
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Apr 8, 2010
It seems the java.net.NetworkInterface implementation of android does not have a byte[] getHardwareAddress() method http://developer.android.com/reference/java/net/NetworkInterface.html
I've found several forums of people trying to do this with no definitive answer, I need to get a somewhat cross-device UUID, so I can't rely on phone numbers or in ANDROID_ID (which can be overwritten and which I think depends on the user having a google account http://developer.android.com/reference/android/provider/Settings.Secure.html#ANDROID_ID
In linux you can use ifconfig or read from /proc/net/arp and you can easily get the Hardware address.
Is there a file in android that I can read?
There has to be a way to get this address since it's shown in the "Settings > About Phone > Status" of the phone.
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Jul 15, 2010
Is there a way to obtain the time zone from the callbacks received
void onLocationChanged(Location location)
using the time information that can be obtained from the location parameter
long Time = location.getTime();
Or if there is another way please provide info!
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Feb 15, 2010
I want to display Battery level stats in my app. How can we obtain such information like Battery Power, Battery Voltage, etc.?
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