When I try to charge my Evo off of my usb charging adapter from my zune, it either A) takes ~3x as long to charge, or B) won't charge at all. Does the USB wall adapter that comes with the phone have something special in it? I'm drawing a blank... I mean even hooking it into the USB of my computer as charge only takes forever too.
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I have an Android app that has both CursorAdapter based ListViews (backed by sqlite) as well as custom BaseAdapter based ListViews which are built on the fly from JSON pulled down from a server.
The data displayed in both is identical - an image and a couple of TextViews. My Cursor-based ListView has 3000 rows, the JSON-based ListView has about 30. However, scrolling down the list is significantly faster for the Cursor-based adapter. For the JSON-based lists, the data is all fetched before the rows are made visible. Images for both types of lists are downloaded on-demand.
I have both ListViews configured identically - both with fastScrollEnabled, scrollingCache and smoothScrollbar set to true.
I'm looking for leads on how to go about trying to figure out what's going on here and to potentially fix it so that the JSON-based ListViews as as fast as the Cursor-based ones.
Just looking at options for data updating affecting items in a ListView and have hit a few issues/queries.
There seems to only be notifyDataSetChanged() and notifyDataSetInvalidated(). While I could use notifyDataSetChanged() I am most likely in my case to have the scenario where additional data has been added and it seems inefficient to say the data has changed, which can only be resolved by calling getCount() and then getView() for all displayed items where knowing the data has been appended would just require adjusting the scrollbar. Is there some way to achieve something similar to this as the market seems happy populating dynamically in a manner that seems to reflect my desired behaviour (unless it just refreshes it all that fast).
Next question is the situation where the data behind just one item has changed. For instance I may wish to download icons in a background thread, but display available information with a placeholder icon. The best idea I've had so far is to store a map of indexes and views in my adapter which I can check against then call getView directly myself to have the view recycled with the new data. I'd just need additional logic to handle removing the map when the view gets destroyed or when it's recycled in getView. Either a bi-directional map (do we have one of those?) or two maps. Is the above likely to be my best approach or is there something built-in/better to get it done.
I have a list view which I'm trying to refresh to update it self when i add an element to the underlying array list.
Here is the code snippet:
CODE:.....
The arrlEvents is the underlying arraylist with the events, and im adding one event, trying to update the list view with notifyDataSetChanged(), but it doesnt work.
Here is the source code for the adapter:
CODE:...............
I'm using an autocomplete box, with suggestions provided by a SimpleQueryAdapter.Not sure if relevant, but only difference I see is that, both in the adapter constructor, as well as in runQuery(), I use a cursor returned by SQLiteDatabase#query obtained via an SQLiteOpenHelper instance.Should I be using on these cursors or not?If I don't use managed cursors, then I get "leak found" warnings ("database was created [sic] but never closed").
View 3 Replies View RelatedCurrently I'm trying to find an efficient way to handle the following scenario. Please comment on my current implementations and all feedback is greatly appreciated! I have about 7 adapters with data. This data comes from database and some come from xml queries over the internet which are kept static in memory. In my current implementation I re-use one ListView constantly to display this data as requested by the user. Here are the questions: 1. Is this a proper approach? or should I have a ListView for every Adapter?
View 9 Replies View RelatedAlot of the MHL adapters are sold with "for Samsung galaxy S II" or "for Galaxy S3", but they look exactly the same, so are they model specific or can be used on Android phone?
View 2 Replies View RelatedI am having two different data in two different adapters.
Now i want to merge both data in a single adapter.
is this possible?
How can I do that?
Charging Battery - Alternative Methods? Charging with USB Cable to any Computer?
View 12 Replies View RelatedI feel like there should be a way. Anyway, let me know
View 1 Replies View RelatedMy HTC Wildfire shows a red LED when charging, which changes to green when fully charged. But as I have red/green colour blindness I cannot tell when it is fully charged. Anyone know of an app that will allow me to change these colours?
View 9 Replies View RelatedI have a ListView filled with twitter tweets. I made a custom Tweet class so I could store a special type number. So, I have the Tweet class and custom ArrayAdapter: Code...
View 1 Replies View RelatedI am trying to display the text from json in a list view.But my problem is that i cant figure out how to display them in list view. I also want to get only some of the text from url(for example, alerttext and date). Can anyone help me in declaring the list adapter and list view in order to display the data in the way i want.
View 1 Replies View RelatedI got home at 9 PM and my battery was at 50%. I've had it connected to my PC in Charge Only mode this whole time. It's 12:37 AM and it is still at 50% charging.Does this happen to anybody else?
Does it effect battery life in anyway?
Also, a bit of rage.
4G scanning...
Connecting to Sprint
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I am running Fresh 3.4, stock kernal I have began to notice an annoying lag when I am charging my phone. It immediately stops lagging when I unplug the phone. Anybody else experiencing this?
View 1 Replies View RelatedI updated to the official Froyo OTA from HTC (.6) and didn't have this problem before the update.
When I plug my EVO into an AC adapter (Belkin, not stock adapter) and then unplug it, notification bar says "Preparing SD Card" which normally only happens after hooking my EVO up to my PC and selecting "Disk Drive" and then unplugging.
As a result, when my EVO is plugged into an AC or USB (and select Charge Only), I can't look at photos, I can't use ASTRO to browse the SD contents and my phone doesn't even ring since my ringtone is an mp3 that's stored on the SD card.
Is this a problem anyone else is seeing? Should I follow the "How to fix Froyo" sticky? I didn't see this as an issue addressed, so I'd prefer not to go through it as I believe I don't have any other significant issues besides this one.
I'm using a Belkin AC Adapter and an A-DATA 16GB MicroSD card, though I have the same problem when plugging via USB into my computer and selecting "Charge Only" and I still can't access the MicroSD card.
Here is a little trick I discovered recently. If you have a later model BMW with the USB port that you would either plug in the iPod connector or a USB stick, if you plug your Incredible in you will be able to charge that phone through the port, negating the need for a separate cigarette lighter charger. This may work on other cars with a USB port, but your mileage may vary.Additionally, you could set up your music folder and playlists directory on the Incredible's internal storage to use it for music playback. Unfortunately on my 2008 X5 with the "single button" iDrive, it only reads the internal storage memory, and not the SD card.
View 13 Replies View Relatedmake sure to right mouse click and eject before just unplugging the usb cord. i corrupted my micro sd by doing this over and over. i had to put the sd into a digi cam and format it before win7, win xp, or the evo could see it. luckily i had my sd backed-up to my laptop hard drive.
View 18 Replies View RelatedUp until now everything works fine. Now I got to add music and boom my usb cord will charge my evo but won't let me add anything onto it. nor does it even give me a option to choose what i want to do with it. charge, htc sync ect.
View 1 Replies View Relatedso i guess if u use your phone while charging, it actually uses the battery (which makes sense of course)but after unplugging, goes down to like 89% because u were using while charging i put it back on the charger without using to 100% and its been there for a while now.
View 4 Replies View RelatedI am getting 9-10 hours off a nightly charge on my Evo.This isn't lasting me the whole day and I usually run out of juice on the drive home from work.I've tried all the battery tricks to get longer time but no luck. I think the reason for the battery drain is because at work, I only receive 1-2 bars on the 3G network. When I step outside, I go to 4-5 bars.I am blaming the battery drain more on my location rather than the phone, which is OK.Anyways, I have the luxury of sitting in front of a laptop all day.This means I can constantly charge my Evo all day through the USB port. Would this have any bad effect on the battery?This means taking the phone on and off the charge throughout the day. If I leave my desk for 10-15 minutes, I'm unplugging the Evo and taking it with me. This could happen 5-10 times a day.Or is it better just to do a charge 1-2 hours before I leave work to make sure it will last the remainder of the evening?
View 26 Replies View RelatedBefore I continue: I don't use any task killers. And I've read every battery trick thread on here and on XDA, so I've done it all. The CDMA fix. Rooting and using OCWidget. Charging it to 100%, turning it off, and then cycling the charge with the phone in the off state. And of course, disabling every data hungry app plus setting screen brightness to 50%. This is my 3rd Android phone, so it's definitely not my first rodeo.
So last night I was using my Evo as it was on the charger. I was browsing the web, and checking out some new apps in the market, so the screen was on for quite a while. I took my Evo off the charger, did some heavy texting, some browsing, Facebook, Twitter, etc, etc, and about 5 hours later I was at 80%. I then put it on the charger, and went to bed.
Fast forward to this morning: Took it off the charger, sent a few texts, and I'm down to 95% within minutes. Of course this frustrated me, since last night I went an hour before it even dropped to 99%. It'll be getting some heavy use today, so the last thing I want to do is leave the house with my battery in the 80% range. I put it back on the charger, and resumed normal usage. Some texting, Facebook, Movies app, Netflix app. Eventually the charging light goes green again. Took it off the charger an hour ago, did some texting, stayed connected to WiFi,and I'm still at 100%. Whereas earlier this morning it dropped 5% in minutes under the same use.
Scratched my head for a second, and remembered that my phone was on and in use while charging last time, before I took it off and got great battery life.
So now, I've set it so my Evo's screen stays on while charging. I also use the Power Control widget to increase the screen brightness to 100% while charging. And then once it's off the charger, just drop it to 50%.
To keep the phone awake while charging:
Menu -> Settings -> Applications -> Development -> And then tap the check box next to 'Stay awake'.
Not saying this is guaranteed to work, and I have no rational explanation as to how this works, but it's definitely helping me. I'm going to do some testing and report back on a few things.
Ever since Froyo my phone seems to take twice as long to charge, if not more than that. Anyone else experiencing this?
View 6 Replies View RelatedI'm having a problem with my nexus one, over heating. I've had this phone three months and now the phone gets soo hot it hurts my hand. The phone seems to get hot when charging even though I'm not touching the phone. I would like to know if there is going to be an update to fix or should i return it.
View 13 Replies View RelatedIs anyone else noticing the phone gets really warm while charging? By warm I mean hot
View 4 Replies View RelatedCheck this out
Make: Online : HTC Evo inductive charging mod
Last night on the way hope I plugged in the micro USB cable from my 500ma car charger while listening to Pandora through the aux cable. I get a bad buzz sound like the phone has some kind of grounding/short/wiring issue. It happens no matter what I'm trying to do through the headphone jack. Even if nothing is playing. There is this really loud buzz.
Is anyone else in here not able to use the aux cable while being plugged in? I'm wondering if it's my Pioneer head unit or the USB charger. I don't get this issue when using aux with my computer speakers at home or headphones.
The internet at my apartment is always cutting out, so I use PDAnet to surf the web on my computer a lot. However, I'm aware that charging my phone off of USB messes with my battery life -- it's had a noticeable impact already.Is there any way to connect your phone to your PC and use debugging features WITHOUT charging the phone?
View 7 Replies View RelatedHas anybody else experienced when charging the phone with a non-motorola charger (got it from ebay for like $5), you really can't operate the phone. I then used it with the charger that came with the phone and everything is fine.
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