Android :: ConvertView With Wrong Type
Jul 29, 2009
I hope someone can share some light on a issue I have with using the convertView that is supplied by the BaseAdapter.
The problem is that I have a couple of different listviews in my app. When using the convertView with listviews that only shows one type everything works fine, and I experience a big performance increase. Nice!
However I also have a listview that can show 4 different types of views, and I see that getView is supplied with a convertView that is of the wrong type.
In my BaseAdapter implementation I have added the following:
CODE:...................
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Sep 18, 2010
Hey guys i really need help :S i gotta problem with my e-mail which is on my phone,When i type username and password, it says it's wrong,
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Nov 4, 2010
I've been scouring throug the examples and tutorials but I can't seem to get my head around how to handle recycling within a subclassed SimpleCursorAdapter. I know that for regular ArrayAdapters you can check convertView for null and inflate if null from the xml and if not null, recycle, but I'm having a little trouble visualizing how that works with the from and to arrays within the SimpleCursorAdapter subclass. I tried to figure this out from the The Busy Coders Guide to Android Development by Commonsware but was unsuccessful. If anyone knows of any tips, examples, or tutorials, I would be grateful to see them.
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Jul 2, 2010
The preference type of UI is used in many Google built-in applications for example Bluetooth , Wifi etc. And the getView of the preference is used to set the image or text to make it visible in the UI screen.
the getView for the pref type UI is defined as below in framework code : ->
CODE:..............................
Where the convertView is not getting recycled and every time whenever the user is scrolling the list up and down, convertVIew comes out to be null.Therefore by logic inflation of the UI also happens all the time in onCreateView().This is a kind of shortcoming in terms of memory utilization , hence in a discussion (MAKE YOUR UI FAST AND EFFICIENT) where Romain Guy has mentioned about the tricks to increase the app performance doesn't hold good for preference type of UI.
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Jul 20, 2010
After awhile of heavy SMS use if i open a message and go to type to respond the words i type do not show up on the screen. Id i minimize the keyboard it shows. If I expand it they go away.
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Nov 7, 2013
My current situation is that I have a phone with 2 camera apps on it, stock and camera FV-5.
Camera FV-5 is slower than the stock camera, so I only use it in situations which I need manual control.
Whenever I open whatsapp and try to send a photo, the app asks me which camera I want to use, with no option to always use stock. I don't want camera FV-5 to exist as an option, as I will open it if I want to use it.
Is there a way to remove an app from the list so that my phone does not recognise camera FV-5 as a camera?
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Nov 3, 2010
My login for jabber account contains "point" symbols ( ���dima��� ).
So, how I can paste or type it in the application?
PS These symbols are the same which displayed while entering passwords
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May 19, 2009
My dev phone has a stock bootloader. while upgrading to the official signed-dream_devphone-img-147201.zip image I suddenly received the message a ota update arrived and i accepted it. How wrong i was! Now i have a phone with the bootloader with hboot-0.95.0000 in stead of the 0.95.3000. Strange thing is it still has the test keys. Is there any way to correct this? I see guides for rooting your standard G1 everywhere but i expect that i can't install these images due to the test keys on my device.
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Oct 27, 2010
In my application on android phones I create server socekt using method.Then, I use Usb bluetooth stick to discover which sdp services are available.On ubuntu I use commands: "hcitool scan" and then "sdptool browse XX:XX:XX:XX:XX:XX".On HTC Desire and Samsung GalaxyS i9000 (android 2.1 update1) - sevice is available but without name.On HTC G2 Touch, HTC Legend (android 2.1 update1) - services is available but "Service name: Generic service".On HTC Nexus One (android 2.1 update1 and android 2.2) and Motorola Milestone (android 2.1 update1)- service is available and with properly name "Service name: MyName".Does anybody know why HTC Desire, HTC Legend, HTC G2 Touch and Samsung GalaxyS i9000 set wrong service name? Or how to force properly name? Is it possible that something wrong with bluetooth stack on that phones?
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Dec 7, 2009
Scrolling on an Android phone makes sense because it's like you're physically sliding the page upwards. However, now that I'm used to doing that, when I get on my laptop and start to scroll with my touchpad, sometimes I find myself scrolling the wrong direction. On a touchpad you drag downwards to go down on the page, or to slide the page upwards. So it's backwards from the motion you would make on your phone.
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Mar 31, 2010
I've obviously been spoiled by Visual Studio, because although I'm just learning Android and the Eclipse environment, debugging apps in Eclipse is becoming a serious detriment to further development.And then, when it executes it under the debugger, I will get a full screen of useless debug info, non of which actually points me to the specific line containing the error.The stackTrace is null within the exception ('e') info tree, and it simply states a message stating 'ArithmeticException'. (that's nice, how about you point me in the direction of where you found it!?)I've looked all over the screen and am baffled that this IDE can't get this right. Does developing with Eclipse resort everyone back to 1991 with printf() like logging at every interval then to track down bugs? Seriously.Is there a configuration or plug-in that I'm missing to help with this?I haven't tested this case with XCode, but if the iPhone dev. IDE handles this more like Visual Studio, then no wonder the Android marketplace has so few apps.
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Aug 10, 2010
I have an Android application that allows the user to select a photo that has already been taken. Once the user selects a photo, I grab the URI information for that photo, use that information to create a bitmap, and then I set the bitmap in an ImageView. This all works perfectly fine.I then give the user the option to select the picture for viewing. When the user chooses to view the picture, I launch an ACTION_VIEW intent, passing the URI data. Intent intent = new Intent(Intent.ACTION_VIEW, pictureUri);startActivity(intent);As you can see, this is very simple code, nothing special going on. The problem is that, when I run this code on my Droid running Android 2.1, about 6 or 7 times out of 10, the application will display the correct picture. But the other 3 or 4 times, I get shown the wrong picture. Also, each time the wrong picture is shown, its always the same incorrect picture being shown. The fact that I see the right picture the majority of the time leads me to believe everything I'm doing in code is fine, so can anyone tell me if you have seen this problem before, and better yet, is there a solution? Here is the exact sequence that I observe on my Droid when I run this (Note: Image URI is already saved before I start the Activity):
- I choose "View Photo" in the Activity
- When things work, I get taken to the gallery and shown image 74
- Each time things do not work, I get shown image 82
Keep in mind that when I start the Activity with the URI already saved (retrieved from database), I set an ImageView based on the URI data in onCreate(), and the Image being shown in the ImageView is ALWAYS the correct image. It's not until I actually decide to view the image using ACTION_VIEW that I see odd behavior. And I know it's not something specific about these 2 photos. I observed this behavior using other photos in the past, and got the same behavior.
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Oct 10, 2010
I have a simple program where I set a spinner to a position. I then call a second module and when I return, I reset the spinner. The spinner display does not display the spinner value. When you tap the spinner, it IS pointing to the correct value, but it displays an incorrect value. In fact, it actually steps down.
I wrote the following simple program to demonstrate. This only happens when the form has a spinner within either a Linearlayout or TableLayout with at lease 1 other element.
CODE:................
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Jun 1, 2010
I have been trying to use reflection for a specifiec Field in the android.os.build class, the MANUFACTURER field...
I have tried by using this code :.............
I am gettign the following errors :
code:..........
And when debugging I noticed that InvocationtargetException is continuesly thrown, so I am guessing I haven't been implementing the whole Reflection principle correctly...
Any idea where things are going wrong or otherwise on how to implement Refelction for a single Field correctly ?
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May 22, 2010
I have a HTC Hero and newly also a Nexus One. I used to debug with the HTC Hero which worked just fine. Now when I try to debug with my Nexus One I just can't make it work. I updated everything Android via Eclipse and have now the version which officially supports Nexus One as a debug device. Whenever I connect the Nexus One, turn on Debug Mode and want to run the application I don't see the device in the debug list.
Anyone got any ideas what I might do wrong? As said above, with the HTC Hero it works just fine.
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Aug 18, 2010
My gmail app says I have thirty eight messages when I only have like five in my inbox.
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Sep 17, 2010
I am using some drawable objects, when I instance them and paint in my canvas they doesn't get the original PNG image file size, instead they get a bigger size, so they does't paint in my canvas as I expected since I wanted them in their original sizes, why this happens?
(original file is 96x96 pixels)
mSprite = mRes.getDrawable(R.drawable.my_sprite);
mSpriteWidth = mSprite.getIntrinsicWidth();
// It returns 114, not 96 mSpriteHeight = mSprite.getIntrinsicHeight();
// It returns 114, not 96
mSprite.setBounds(coordX, coordY, coordX + mSpriteWidth, coordY + mSpriteHeight); mSprite_PipeRect.draw(canvas); //It paints at 114x114 size, it shows bigger in the screen then original size.
Something similar happens with the background but it is fixed in the "setSurfaceSize" event this way:
public void setSurfaceSize(int width, int height) {
mBackgroundImage = Bitmap.createScaledBitmap(mBackgroundImage, width, height, true);
}
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Apr 13, 2010
All the messages being logged in LogCat now have the wrong time. It is running about 35 minutes fast. Any idea why or more importantly.
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Jun 8, 2009
It's not a massive issue but does anyone else have problems sometimes with photos coming out in the wrong orientation...
For example:
If I hold the phone like this and take the pic:
It comes out this way:
I know I can rotate them but I was just a bit mystified.
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Jan 18, 2010
I am very new to android programming. i was following a guide in here, to create an application that shows the current location, i did as was told in the guide, but whenever i try to run it, it crashes, and asks for "force Close",
does somebody know what i am doing wrong? here is the code....
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Nov 28, 2009
My meebo IM keeps quitting like after a minute for the last week or so whats up?
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Dec 31, 2009
Why are all the youtube videos blurry? I've only had my moto droid for a week but I've looked at a bunch of youtube videos and they are all blurry. Am I doing something wrong?
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Jul 21, 2010
I have an IntentService that downloads some files. The problem is that I create a Toast inside the IntentService like this
Toast.makeText(getApplicationContext(), "some message", Toast.LENGTH_SHORT).show();
The Toast will never disappear event if I exit the app. The only way to destroy it is to kill the process.
What am I doing wrong?
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Jul 26, 2010
I have tried to use marquee and its not working
here is my code...
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Aug 8, 2010
So ya, there's a phone in my HTC Hero. No surprise.
My problem is this:
I find that the easiest way to call a person is to go to the phone app and scroll through the call history displayed to find the person I wish to call. Once I see their name, I just press on it, and the call begins. Unfortunately, a friend I call often may use their house phone or cell phone when I only ever want to call their cell (Evo ). Often, the situation is that I previously talked to him on his house phone, and I'm calling him in the middle of the night (we're young; we don't sleep rational hours during the summer... or ever). Unfortunately for me, my call usually bugs his parents, and I get reprimanded...
Is there a setting that allows me to only call his cell, or do I just need to break this habit?
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Jul 7, 2010
I've just released an update to my app and the apk file is 3.5mb on my system. It is reported as 3.5mb in the developer console. But in the market it is showing up as 7.02mb. I'm now getting comments that that app is too big and I feel people may not purchase it if they think it will take up 7mb of space.
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Oct 8, 2010
I use this code in my getView:
@Override
public View getView(int position, View convertView, ViewGroup parent) {
View v = convertView;
if (v == null) {
LayoutInflater vi = (LayoutInflater)getSystemService
(Context.LAYOUT_INFLATER_SERVICE);
v = vi.inflate(R.layout.listrow, null);
}
Order o = items.get(position);
if (o != null) {
TextView tt = (TextView) v.findViewById(R.id.toptext);
ImageView thumb = (ImageView) v.findViewById(R.id.icon);
if(o.getOrderDrawable()!=null){
thumb.setImageDrawable(o.getOrderDrawable());
}
else{
tt.setText(o.getOrderTitle());
}
}
return v;}
The problem is when scrolling; sometimes the correct image shows, but sometimes when scrolling back/forward, the images shows randomly and that is not associated with the row. The images are downloaded from the web.
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May 4, 2010
In Android 2.1, when I am opening Calendar application, going to Agenda view and from their if I go to Day schedule, that date is shown as "Thursday 01-Jan-1970" in title bar. It is not picking system date.
This is same case for week and Month view. In week schedule it is showing "December 1969 - January 1970" and for Month it display "January 1970" at Calendar title bar. This is happening when I go to day/month/week schedule from Agenda page.
I am not seeing any error in logcat message when wrong date is displayed.
Here is the logcat message:
CODE:................
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Aug 25, 2010
I have a ListView that can have one or more clickable items. When I apply a rotate animation the coordinates that are clicked correspond to the original position of the ListView items. For example a list with one item in portrait mode rotated 180 degrees will have the item upside down on the bottom of the screen, but the item gets the click event when I click the top of the screen. 180 degrees is just an example I want to be able to move an arbitrary angle.
I've looked through all the listView properties but none seem to have any effect on the clickable coordinates. I would assume willChangeTransformationMatrix would do the trick but it doesn't, neither does invalidate or invalidateViews. Is there a property I'm overlooking or how would I go about moving the coordinates to the right place?
sample code- list items highlight correctly when clicked, rotate with dpad_center, after rotated items highlight when original position is clicked. I've tried animating the animation, animationSet, and layoutAnimationController all same result.
CODE:...............
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Mar 21, 2010
The problem is that when I filter the list the entries switch position in the list view. Take for example three entries: 'A', 'B' and 'C' where 'C' is checked beforehand (i.e. the entry at position 3 in the list). When I type a 'C' on the keyboard, only the 'C' entry is displayed (as intended). Now 'C' is not checked anymore, since the entry has moved from the checked position 3 to the unchecked position 1 in the list.This behavior leads to some not very welcome effects in the app. Is there a way to "move the selection with the filtering", i.e. bind the checked state to the entry and not to its initial position in the list? Or do I need to find a new approach?
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