Trying to do the following:
animTimeChange = AnimationUtils.loadAnimation(this, android.R.anim.slide_in_left);
itemTime.startAnimation(animTimeChange);
itemTime.setText("new text");
but the animation happens thru blank screen (i.e. original text is cleared, then new text appears with animation). How to avoid that blank screen?
(my TextView is part of ListView row, I've tried to use TextSwitcher - it doesn't work properly; for ViewFlipper - I am not sure where add Views there, since this is part of the ListView)
TextSwitcher is exactly what you should be using for this. Check out the API Demo for TextSwitcher.
The way you should implement this is in your ListAdapter, provide TextSwitcher views to the ListView instead of TextViews. Then you can just call TextSwitcher.setText() on the list item you want to change.
Note that you should imediately get rid of your reference to the list item to avoid REALLY messing up listview.
Related
I am trying to code a layout, but I do not know well how to approach it.
Initially I have the following:
When the user click in this View, I need to show:
I thought I will need a Spinner, but the content that is shown when the user click is not a list but a set of Views (In this case, it will be a LinearLayout with a Spinner and a EditText).
I am a little lost, what would be the best approach to achieve this?
Do I need to implement a CustomView?
Sorry if it is a dummy question, but I can figure out how to code this Layout.
I think the best approach would be to make a LinearLayout in wich you can place you Spinner and your Search EditText and set this LinearLayout ViewGroup setVisible(View.INVISIBLE).
Then when you click on the "registra alimento" View set the LinearLayout below to setVisible(View.VISIBLE)
To fade it in:
Animation in = AnimationUtils.loadAnimation(this, android.R.anim.fade_in);
viewToAnimate.startAnimation(in);
viewToAnimate.setVisibility(View.VISIBLE);
Take one Linear layout add Textview of Registrar alimento than set linear onClickListener with visibility of Spinner and edittext.(Also maintain flag for visible invisible )
I need a component that works like the picture below but I'm having trouble coming up with some kind of decent solution that works.
I want the list to have a center locked selection but being scrollable with the d-pad. This is for an application running on a TV so no need for touch scroll. So when pressing down on the remote d-pad the list will scroll and a new item will size up and the current selected one will size down and the new selection will still be in the middle.
I've tried doing this using a ListView that I extended and programmatically scrolling when pressing down or up. On scroll finished I called notifyDatasetChanged() on the ListView for re-inflating of the childs and in the ListViews adapters getView() I made the animation of the view located at the current selected position.
This is not optimal since I need to call notifyDatasetChanged(), which re-inflates all visible views, for the animation to apply. The UI becomes laggy when doing this and scrolling fast. It's also not possible to make som kind of compress animation when current selected item goes out of selection. There is also some trouble with the end items (read views) such the first or last in the list when doing animation of them, the may sometimes go out of screen.
I think that his must have been done before and maybe I'm missing it when searching for an answer.
Have anyone done something similar or do you have some suggestions of how this can be achieved? Maybe I'm just starting of with the wrong component here..
Regards,
Kristoffer
I basically have 5 text views that fill in one on top of the other. Rather then just all showing up like they do now, I want them to all come in with some animation, one after the other. Anyone have a link to a tutorial on how to animate TextView objects? only one I saw in the android docs involved using images as well as needing an image in the background.
Animating a TextView is basically like animating any other view. If you want it to show up one after one, you can implement an AnimationListener and start the corresponding TextView when the previous has finished.
I have a listview in my android application, and i want to have a delete button in each item.
I want to show/hide this button by toggling an external button. Is it possible to do this with an animation? Also the animation has to be synchronized on all items.
I know how to do this without animation but with animation i have no clue.
Does anyone know how to do that?
Thanks
If you take a ScrollView that has a LinearLayout inside it. Then by adding rows to it using an inflater for the custom row and inserting each row into the LinerLayout you mock a ListView. It's actually faster for smaller ListViews to do this. Inside your LineraLyout set the android:animateChanges = "true" then add an onClick listener to the button in each row that will remove the view from your LinerLayout you can get the desired effect. It is all in one of the samples on the Android website. If you need source code I can post an example but to see the effect in action look to a sample app I published on Google Play called My Gratitude List that I published to practice some layout effects. Here is the link to the app.
I am using AdapterView to have Custom List. But my Xml layout not only
contains that List. It also have some other elements like TextBox,
labels, ImageButton at the top and bottom. so when i scroll it up
and animation starts it also draw elements on that Top Part(Which
contains ImageButton and other stuff). so can some one tell me how can
i remove it ? another issue is it do not have scrool bar. can some one
tell me how can i add scroll bar in it ?
for adding scroll bar to the listView add this attribute to your listview in the xml
android:scrollbars="vertical"
Check the following link. here i mentioned a complete code to use listview properly. Using this we can achieve any listview behavior. We can embed animation also.
For controlling list View Behavior ensure the getView Method of your list is generating the vew dynamically and as per your requirements . Each time a list get scrolled . The getView Method get called for all the element in the view. Do account all these things.
Change ListView background - strange behaviour
Hope this help :)