Android :: Schedule Heavy Work For Later Display For Listviews?
Mar 26, 2010
I have a listview with 200 items. I use a custom view for each row. There is a code that takes some time to calculate, and because of this the list hangs out on scrolling and loads in slow (2-3sec). I have subclassed SimpleCursorAdapter, and using Filterable and SectionIndexer. I have in mind to show initially the name of the record, and put in a thread the calculation, and will show up later when it's done. How do I push back some work, and later update the listview to include the calculated data? This should show up on fly without user interaction.
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Mar 25, 2009
I am trying to design a UI which utlizes two ListViews on the screen at the same time. Is this possible ?
So here is a quick example of how I was intending to do this.
1) Create an XML which positions 2 ListViews one onto of the other each ListView having there own ID
<ListView android:id="@android:id/list" android:layout_width="fill_parent" android:layout_height="198px"
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Apr 5, 2010
I want to have multiple listviews in single activity. But only one listview should be displayed at one time. The listviews will be loaded dynamically. So, how can I fill all the four listviews at the same time and display only one.
If anyone knows the solution then please share it over here. I hope to get a quick response.
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Apr 25, 2010
I'm trying to figure out how it's been designed. How it holds its items? How do I get a hold of the scrolling container? How can I know it's exact scrolling position? How can I scroll it to an exact position?
I want to have all the current benefits the ListView provides plus detailed scrolling control... How about animating from x to x+100 scroll position?
Maybe I need to create my own ListView? Where do I begin?
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Mar 8, 2010
I am just getting started with the Android SDK and I had a quick question. I am trying to set up a ListView with a rectangle of color on the left and then a bit of text for each row. I also want to make it so I can click each entry in the list and open a new activity to display some information (similar to the contact list).
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Oct 11, 2010
I wish to work with checked list views wherein only one item can be selected at a time. Some queries related to this:
1) Is it advised to work with CheckedTextView as the ListView items, or a combination of CheckBox and TextView?
2) If using CheckedTextView, the text comes first and the checkbox appears on right edge. Is it possible to make the checkbox come on the left of the TextView?
3) How can I make one of the items as checked in onCreate()?
I am using array adapter and calling setAdapter() to populate list.
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Dec 30, 2008
I'm wanting an app that I can use as a schedule book for my work schedule Kinda like the to-do lists and calanders, but made so that its just a note for the whole day "work from 1pm-10pm" as an example
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Apr 18, 2010
I guess my previous question wasn't clear enough ( http://stackoverflow.com/questions/2549585/android-failed-to-setcontentview-when-switching-to-listactivity ), so I explain as follows.
In my app I have two listactivities which uses two different listviews:
CODE:.......
As required by android, listview must have an ID which is exactly "@android:id/list". If I set the listview in both listview1 and listview2 with the same ID, then they will end up using the same format of listview, which is not what I want. But if I set one of the IDs to be sth like "@+id/listview2", android gave me the error: java.lang.RuntimeException: Your content must have a ListView whose id attribute is 'android.R.id.list'
My listview is sort of complicated, customed list with image icons and text, so in my code, I also extended the ListAdapter:
CODE:........
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Feb 7, 2014
I have an Android tablet running Jelly Bean that I have always plugged in on my desk and use as a display for a browser based dashboard.I want it to turn the display on at 8:00am and turn off at 5:00pm Monday through Friday. I can't find an app that will do this and I have tried to do it in Tasker with no luck.
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Nov 7, 2010
I am not very familiar with android coding so try to help me on a easy way.
The problem:
I have 2 Listviews and a onClick event handler.
How can i find out on which listview the user currently clicked?
public void onListItemClick(ListView l, View v, int position, long id) {
'Approach: if listview1 is clicked then FUNCTION1() else FUNCTION2()'}
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May 10, 2010
I'm searching for android phones that can use video out to the tv for a research project. I'm considering the HTC Touch Pro.
Is there anything I have to do specifically to get the video out to work (for displaying my app on the tv)? or will the phone just display a running app on the tv without extra work?
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Aug 18, 2010
I developed an "heavy" application (700 Mb !). With an "apk installer" application, i can install it on the Nexus One SD card (Froyo "installLocation" option). My application is heavy because of the videos it contains (located in /raw directory). The problem I have, is that it crashes when launched, with this error :
CODE:.................
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Nov 15, 2010
I cant get this to work anymore
Here is my code...
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Aug 18, 2010
I developed an "heavy" application (700 Mb !). With an "apk installer" application, i can install it on the Nexus One SD card (Froyo "installLocation" option). My application is heavy because of the videos it contains (located in /raw directory). The problem I have, is that it crashes when launched, with this error :
CODE:............
I dont't understand the reason of this error, because when i try the same thing with a lighter application (250 Mb) it runs perfectly. Has anyone of you ever had this kind of problem ? Do you know if there is a size limit for applications to work ?
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Jan 5, 2010
I will create a service to do something when some hot situation occurs.
By hot situation I mean:
the GPS/cell coordinates are in known zone;
known Bluetooth device detected;
known Wi-Fi network detected;
weather info has change;
considerable movement speed change detected: eg. from walking to travel by car.
As you see these tasks are heavy, and will be run frequently. 15 mins, but sometimes even more, when I have to detect the movement speed of the device.
The question I have, will this drain the battery heavily?
If so, what recommendations do you have to minimize battery drain with the above tasks?
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Jun 20, 2010
So from what I can tell Media.insert Image is locked to heavy compression on all images. This includes when passing in the path to a photo in the filesystem. As a test I used a 3000x2000 pixel jpg which had been previously saved at maximum quality and was ~6MB. After passing the path to Media.insert Image, the resultant copy (still 3000x2000) is 623KB. I passed in another copy of the 3000x2000 image, this one compressed down to 393KB. After Media.insert Image, the image filesize is 492KB. I'm wondering if there's a way to specify the compression when images are saved by insert Image. I'm also wondering why this is recompressing jpgs, rather than simply copying them into DCIM. A side-effect of opening and re-compressing these images is that it imposes a rather low VM cap on what insert Image can handle. I'm getting out-of-memory errors when trying to pass the path of a 10 megapixel image.
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May 12, 2014
I am looking for a code-heavy way of controlling an android phone with scripts. For example, can you hook your android up to your PC and then control it virtually as if you were doing everything with your finger using scripts?
In my mind I imagine the code would look something like this (this is fake code):
1. var i = 30px;
2. Touch the screen at coordinates x, y;
3. Scroll to cords x, y minus i;
4. Touch the screen at cords x, y;
5. Swipe to cords x + 80, y;
6. Single click cords x, y;
7. if (cords x, y = rgb(0, 0-255,0) { //aka a shade of green
8. var count = count++ }
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Jun 25, 2010
I was at the Met game tonight and turned on the 4G on my Evo and to my suprise a STRONG 4G signal inside Citi Field was surfing the web at crazy 4G speeds, then I left and back to 3G.
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Jun 14, 2013
i'm using an xperia ray with ICS 4.0..when I want to play some heavy games like Modern Combat 3..it must be lagging..
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Mar 18, 2013
So my Galaxy s3 all of a sudden started to have stutters, i have a custom rom Foxhound 2.3, and when i try any custom kernel it lags as hell. (Stock also gives stutters so its not kernel related i think)
For example perseus stutters my phone in app drawer and every time i open an application.
Syah 1.8.9. although its better, still have some stutters...
the only one that can have the phone more stable is the stock one. I dont really mind having the stock kernel its just that it makes the phone more stable but it still stutters when opening apps and in the app drawer.
Its weird because in applications i have no problems, and when im playing games is all good to.. even the more heavy intensive ones. Also my boot and shutdown animation stutter or jitters a little bit.. a thing that dint happened.
Also the benchmarks are good as always +/- 16000 on antutu, no changes... so i don't really understand whats happening...
Steps so far:
-Tested other custom roms including CM10.1 Nightly
-Tested various kernel.
-Flashed stock rom with odin
Every time with megawipe. always...
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Apr 18, 2010
I was just wondering if the droid eris could run heavy applications like gamelofts nova etc. If so is it a lot slower than the moto droid? And feel free to torture the noob.
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May 18, 2010
Mindlessly exciting shooter game!
Download Link: market://details?id=com.com2us.HG
Game Play
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Dec 16, 2009
Is it common that the default keyboard and input method is a bit slow and lags pretty heavy behind typing? It seems like the Eris can't keep up w my typing and it causes delays and issues when typing messages, etc. Not sure if its the hepatic feedback or the correcting, but its frustrating at times. Apart from that, I like the keyboard and the predictive text works well.
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Aug 18, 2010
I have just unplugged my phone from charge and checked the usage with Spare parts, Dialer is showing heavy usage in the network usage panel, does anyone know why this is as I haven't made any phone calls?
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Sep 7, 2010
I have a ListView, and within each list item I have some TextViews and a CheckBox. When I check a CheckBox and my onCheckedChangeListener fires, everything works as it should. However, random other checkboxes get checked once one is checked. Here is an example.
If I click on the first CheckBox:
8 is checked.
15 is checked.
21 is checked.
27 is checked.
33 is checked.
41 is checked.
Then if I scroll all the way up, none are checked until 6. The next being 13.
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Nov 18, 2009
Firstly, I have found many examples of how to grab data from a db and place it into a list, however this seems to be all for ListActivites.
My list is part of the UI and therefore I can't use a ListActivity because it does not consume the whole screen (or can I?).
This is the UI:
CODE:........
So, from what ive read I need to grab the data from the db, then place it into some sort of array then use an array adapter to fill the list view. Is that correct? If so, is there some sample code because all I can find is code releated to ListActivites.
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May 15, 2010
I am writing a software that i have to drill down on content a lot. For example when the program starts a listview is displayed. When user clicks on an item, then a second listview must be displayed. For example:
Select Continent > Select Country > Select State > Select City > Select Address
What is the best way to do this (less memory, faster, easier to code etc)? To create multiple listviews with multiple adapters? Or 1 listview with multiple Adapters? Lists are loaded from an external XML File.
So far i am creating a new adapter and setting it to the listview. How do i create a second listview and after clicking on 1st listview displaying the second one, with animation. Any examples? Extend my class to ListActivity or Activity?
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Dec 10, 2009
AT&T evidently has a new campaign to get iPhone users to reduce the amount of video streaming and other data intensive activities they engage in, and may start charging them based on data use.
Their network just can't handle current data levels, and AT&T can't get it updated fast enough to handle the data requirements.
Kind of blows up the ads they've had on TV showing how great their network coverage "really is."
Already been giving my iPhone buddy a hard time showing off my Droid to him, now I'm really going to have some fun at his expense.
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Aug 13, 2010
Hello, I need to put several listviews inner a LinearLayout. The Listviews should be wrap content to adapt the listview to their items. I need have one only scroll with which I can scroll all the listviews. I know that i can't use a scrollview because the listviews have their own scroll (but i don't need the scrolls of the listviews because i have them in wrap-content). I thought maybe puting the listviews inside the LinearLayout I will hadn't problems with the scrollview, but it didn't work, the LinearLayout was fixed to the screen, the scrollview didn't appear and the listviews ended scrollable. Without the scrollview if i have the list in wrap-content, their shown properly but i haven't any scroll and i can't see the lisviews below the screen. Really i have had this bug for one month and i haven't found any solution,
My code:
CODE:............
JAVA
CODE:...............
How you can see i create the lisviews dinamically and i put indside the layout with a secttion header. if you have some doubt ask me I need find a solution soon.
Sample Image: http://www.freeimagehosting.net/image.php?6dea1468bd.png
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Aug 16, 2009
I want to show many listviews in one activity. Something like
Textview Listview TextView Listview ..........
Every listview has different type of adapter. For this, I made the activity class like:-
CODE:........................
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