Android :: Way To Invert Scrolling
May 22, 2010
Just wondering if anyone knows of a way to invert scrolling so that you swipe down-to-go-down and up-to-go-up instead of the way it is by default: up-to-go-down and down-to-go-up?The only reason it's a problem for me is that I have a laptop and use two-finger-scrolling on the trackpad (down-to-go-down/up-to-go-up). This means that when I switch from one to the other, I keep trying to go the wring way with my swipes. Confusing. I looked through all of the settings on the phone and tried googling and looking through the available apps but to no avail.
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May 14, 2010
I am starting to develop a game. Right now I got a sprite animation going when a player moves across using sprite sheet. In my sprite sheet the character is always facing the same way, left. Now if I want the character to move right, I want it to be facing right. So is there a quick way in android to invert the bitmap after it has been loaded in? Or do I have to create sprite sheet for character facing right?
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Jul 17, 2009
I have a Canvas backed by a bitmap that I want to invert the color for a rectangular region. The meaning of inversion is to flip the bits of all the colors pixels.
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May 15, 2012
I bought a One S, and love how blacks look. Also, from what I read, AMOLED screens save battery on black backgrounds. I was wondering how do I go about inverting apps or where to get these with inverted colors (black background, white text).
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Sep 24, 2012
I have been searching all over the place for a guide on how to invert apk's.
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Sep 15, 2010
My app builds up a custom screen as dictated to me via the users 'application'. This means that I can end up in the situation where I have a parent scrollview and somewhere down the heirachy I can have a listView or a multiline TextView. Both of these scenarios continue to work fine under 2.1, however are broken in 2.2 (both device and emulator). The symptoms are that the child (list or textview) is unable to scroll using touch gestures although they can be scrolled using the keypad. Has anyone else experienced this behaviour and/or have a work around?? It appears that the onTouchEvent function in View has been changed substantially but I am currently delving into the code...
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Sep 11, 2009
I want to enable scrolling for textview. I set vertical scrollbar which appears but scrolling doesn't work. Why? I am not using ScrollView because HomeScreen widget doesn't support that component.
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Jul 7, 2010
I'm trying to make a layout that is something similar to how the android market is...where say under comments there is what appears to be a ListView but it does not scroll (the whole page scroll but not the comments). I'm not sure if its even a ListView but I want something that looks like the list view (ie. have those divider bars and what not but NOT SCROLLABLE). There are people suggesting to use a LinearLayout instead of a ListView but I also what the items to be clickable and open a new activity. Please help?
My current layout tree is like so
<LinearLayout>
<ScrollView>
<RelativeLayout>
I am looking to put content inside the RelativeLayout.
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Aug 16, 2010
I have a gallery and when a image is selected, I want to start new thread (for loading other images). But I don't want to do it while the gallery is scrolling. How can I know the state of the gallery and if it is still scrolling? I can't use "setCallbackDuringFling(false)" because I have a textview under the image that has to be updated during the scrolling.
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Dec 29, 2009
I have a list Activity 4 which i have extended the BaseAdapter and the getview looks like this.
public View getView(int position, View convertView, ViewGroup parent) {
View row=null;
for(int i=0;i<10; {
row = convertView;
if(row==null) {
LayoutInflater inflater = mContext.getLayoutInflater();
row = inflater.inflate(R.layout.parsed,null); }
TextView id = (TextView)row.findViewById(R.id.id);
id.setText(idvector.elementAt(position));
TextView photo = (TextView)row.findViewById(R.id.photo);....
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May 22, 2010
I have a ListView with custom rows. When any of these rows is clicked, the ListView's data is regenerated. I'd like the list to scroll back to the top when this happens.
I initially tried using setSelection(0) in each row's OnClickListener to achieve this but was unsuccessful (I believe because the ListView loses its scroll position when its data is invalidated - so my call to
setSelection is undone. I still don't understand how the ListView decides where to scroll to after invalidation, though).
The only working solution I know of was given by Romain Guy here: http://groups.google.com/group/android-developers/browse_thread/thread/127ca57414035301
It involves (View.post)ing the call to _listView.setSelection(0). I found this to perform quite poorly.
The newly generated list shows up with its scroll location unchanged and there is a considerable delay before it scrolls back to the top.
Is there any better way to achieve this functionality?
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Aug 19, 2010
In one of my projects I've got a ListView with hundreds of elements. But when scrolling through this list I get the following error:
CODE:.....................
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Apr 13, 2010
I currently have one Scrollview which contains a table layout and one list in my activity. Now my problem is that I wanted to move both of them(Scrollview and list) together and with proper synchronization...
So if scrollview is being scrolled then listview should also scroll with the same distance, and vice versa...
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Oct 3, 2010
I'm currently working on a game for android.
I have three ImageView's next to each other, they're positioned next to each other using the "android:layout_toRightOf". The views are located within a RelativeLayout tag. Each of these views are centered into the middle of the screen using "android:scaleType="fitCenter"" and they fill the entire screen.
I'm attempting to implement a horizontal scroll from one view to another so that I basically get one view on my screen at a time.
Here is the code that I'm currently using
CODE:................
What I'm currently getting is three images next to each other -- but sometimes they take up less then an entire screen. I want both the left and right padding to be correct, so that I can only see one image at a time.
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Jun 17, 2010
I have an ImageView that is twice the height of a normale screen ( 960 dip). I would like to scroll it nicely up and down on the screen. The bottom of the screen should contain a bottom. I have tried various combinations of ScrollView and Imageviews without any success. I have also thinkered with the :isScrollContainer attribute without results. Anyone knows how to do this?
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Mar 30, 2009
Currently, attempting to scroll when the text view has large amount of text makes the app completely unresponsive. It doesn't ANR, but it doesn't respond either. I've tried occasionally removing some text from the text view and removing some spans also, but it doesn't seem to help much. Any idea how to improve scrolling? It takes ages to scroll up or down. I also tried throttling touch events but it hasn't helped either.
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Dec 1, 2009
Hey guys, am I the only one on the Droid that is bothered by the way handcent flick scrolls? when you press your finger to the screen during scrolling it doesnt stop or slow down the scrolling like the default messaging app does. Is there any way to fix this or any other nice sms app?
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Oct 18, 2010
I have used tab view and inside frame first view is ListView.My list view has white and blue background alternately like 1st is white, 2nd blue, 3rd white, 4th blue.I have tried disabing cachehint and even using it. But when i scroll the alternate colors are broken like we can see 2 consecutive in white or blue. Sometimes even 3 in same color. This happens when i scroll the list.
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Sep 17, 2010
I am working on a application, in which I want to show Image gallery containing full screen images. I have put the gallery in the application successfully. But I am failing to apply some properties to the gallery as per the app design demands. I am using android.widget.Gallery library of android. The things I am failing to do are:
1) I wanna scroll the gallery images one at a time, as now its getting scrolled more than one images in one scroll.
2) And on scrolling the gallery, the images coming next from left/ right should move smothly into the screen and should stop at the screen edges. It should not scroll beyong that in one scroll.
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Jan 22, 2009
I am using scrollview. I need to disable scrolling bar on particular time. Is it possible?
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Mar 11, 2009
Sometimes when I try to scroll using a scrollview (wrapped around a textview), there will be no response. I've noticed this in both my apps and the only common thing between them is the textview in both apps use Spanned (SpanableStringBuilder to be exact) text. This happens even when there is no activity on the window and no any pops up either.
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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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Jul 11, 2010
Is it possible to have a list activity that dosen't finish? i.e. if you scroll to the end of the list then the start of the list begins again? It's be best if you could also disable the scroll bar.
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Jul 8, 2010
Is there an easy to know the direction of scroll (up or down for a vertical list) and the scroll velocity for ListView's?
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Aug 2, 2010
I have facing problem in scrolling webview in vertically, actually I have scroll view with in the layout have defined webview in layout so when I scroll the webview vertically it scroll whole layout,so i want to enable scroll for webview.
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Jul 7, 2009
is it possible to have both Scrollbars together. My Application is too big for just one of them. I tried it with a ScrollView in a HorizontalScrollView Layout, but it supports only vertical or horizontal scrolling at the same time and not crosswise. It would be nice to have a scrolling just like in the Browser of Android. Is this possible?
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Dec 30, 2009
I want to display Header to my ListView. I used getListView ().addHeaderView() method to add header to Listview. but this is Header is scrolling with List.I want header should be constant.
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Oct 12, 2010
I am having a customized list view in my application, which is showing an image and text.
The Image I am getting from URL, using the code below:
CODE:..............
All is working perfect, except the list view scrolling, its very slow. If I disable the images, the scroll speed smooth-ens , but with the image enabled, it lags alot.
Is there any possible way I can reduce or remove this lagging?
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Dec 24, 2009
I would like to have a ListView that scrolls in a carousel way, so when you scroll to the bottom and continue scolling, it should get back to the top element.
I do not want to use ViewSwitcher, nor ViewFlipper. How can I achieve that?
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Jan 29, 2009
I'm having problems with ListViews in my application. I thought everything was fine until I noticed that if I scrolled up and down through the list quickly a number of times, sooner or later the app would crash with an OutOfMemoryError.
When I searched for the error I noticed a number of posts related to loading images. As my list items included a small arrow png, I assumed the problem lay here. However even after removing this and all other drawables I had (gradient background and list separator) the problem still remains.
Here's the stack trace
CODE:...............
I've had a look in DDMS and noticed that the percentage memory used in the heap doesn't go above 70%. Also, doesn't the reported 66K seem like a very small amount to be causing a crash?
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