Android :: Animating Different Views During The Same Animation
Nov 10, 2010
Does anyone knows if it's possible to animate different views during the same animation: I have a linear layout containing 6 dices (each dice extends a textview) and I need to animate each dice to simulate a roll (each dice will rotate on itself). I know how to do this rotation on each dice by using 6 animations, but I want to group these animations in one, so that I would be able to add an animation listener to execute further instructions at the end of this animation. I tried with an animationset but didn't manage to do it.
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Feb 14, 2009
I have a few views and animations and I need to figure out a way to package them so I can use them throughout my app. I thought I should be able to use ViewGroup, however, things are getting a bit complicated as my animations need to repeat and to achieve that I have applied the technique with an AnimationListener posting to a Runnable when the animation stops so it plays again in a loop. Also they all have different startOffset values, and I'm not sure how a ViewGroup can handle that as well. What is the best practice for hadnling multiple views and animations?
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Aug 13, 2009
How can i make my animation visible above other views on the layout. i tried with the zorder adjustment but it didn't work out.
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Aug 29, 2010
Im using ListView to to show some custom data, once data is updated in the adapter i call notifyDatasetChanged(), so the view will get updated, all of this works well, my issue though is i would like to run an animation once only on items that got changed when the adapter was updated. currently i keep a copy of all the changed objects and i tried to animate the correct items through the getView() call.
However if i do it only once for every getView call then i see no animation most of the time on items that changed. if i continue to do so in successive getView calls i see animation on items that don not change as well and also the ones that changed get animated again and again.
Im guessing sometimes android calls the getView() for other reasons than showing the generated view immediately, and thats the reason it doesnt work if i do it once.
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Sep 7, 2010
I'm looking for a simple animation example using the android SDK for displaying a little animation between views.
Basically when we have a list view and a detail view - lets have a 'transition' animation between them.
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Apr 9, 2009
When ever I try to animate a view using a simple xml based animation, it seems to have default interpolator set of some kind as the motion is not truly linear.
Is there a way to set the default animation interpolator to linear and remove the lag in the start/end of the animation.
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Jan 6, 2010
I have a simple ListView and on that ListView I have placed a number of custom defined Views. The CustomView has ImageView and two TextViews.
The CustomView also has a "stateful drawable" as background, so that the background image (a 9-patch) changes if you press the Row in the ListView. When pressing the Row, the background image changes to a Red-ish thing.
The problem is that when the background changes from the default greyish, all the Views in the CustomView (ImageView and TextViews) still have their greyish background and thus creates very ugly greay boxes on top of the now redish background.
What is the best way to solve that problem? I hoped that such things were handled automatically (as it is done in for example .NET), but I was wrong it seems.
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Nov 17, 2010
I'm fading out an imageview with alpha animation. I'd like the image to stay transparent after the animation. Tried with different combinations of fillAfter and fillEnabled, no luck. How can this be achieved?
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Nov 16, 2010
I am implementing a music player application in Android. My play list selection screen is implemented as a tab selector widget which contains a ListActivity inside each of the tabs: Artist, Albums, Songs.
I want to update the ListView in each of the ListActivity when I delete an item from any of the lists.
i.e. When I long press an item in the Artists list a context menu is drawn with "Delete Artist"
And it should delete all the songs from this artist in the Songs ListView, delete all the albums by this artist in the Albums ListView, and finally delete the entry for the artist in the Artist ListView.
Each of the ListActivity has its own fillData() method, which updates the ListView when the button in the context menu is pressed.
How can I call the fillData() method of the Albums ListActivity after I update the ListView inside of the Artists ListActivity?
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Feb 28, 2010
I want to populate a table, defined in layout xml file through the programmatic way. I have define Table with a single row defining its header, with all the attributes set. Now i want to know a way so that i can just replicate that header row in the table with new content.
I tried using inflator inflate(int,view) method, but at runtime it showed up with error.
Here is the XML code for the layout file defining the table
CODE:.................
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Mar 6, 2010
I have the following XML code:.................
The idea is to change the views, whenever I press one of the radio buttons. When I press a button the first time everything works out fine, but the second time I press a button, I get an IllegalStateException, and I can't quite see why I'm getting this.
Also, the Activity seems to set all my global variables to null, which is why I have to create them every time I switch from portrait to landscape or vice versa. So I would like to know if there is a way I can save my views in the Bundle, or any other way in which I can permanently save my views, so I don't have to add or create them every time, I flip the phone. And whenever I flip the phone, it seems that it rereads the main XML file, causing the RadioGroup to be set to 2D even if the 3D button is checked. This is because I've said the 2D button to be checked from when the app is first created, but I would like to also save the state of that RadioGroup.
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Jun 16, 2010
How do you align views relative to the "middle" part of another view? I think it is best explained with a pic of the UI I'm trying to create in android.
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Sep 17, 2010
Is it possible to animate the expanding and collapsing of the groups in a ExpandableListView.
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Apr 8, 2009
How do I animate a Layout?
I have a RelativeLayout which sits in a certain position within my Activity; I want to glide it in and out from the bottom of the screen when a certain button is pressed.
I have found examples of animating the children of lists etc but this is not what I want. I simply want to animate the whole layout and the views within it together.
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Jun 22, 2010
I have tried a weather widget and its working fine. The Weather widget is an app widget and I update the widget once in 6 hrs similar to the application on android site using AlarmManager. Now I want to animate the widget (ImageView) every 100 ms similar to HTC homescreen.
I dont think AppWidgets will scale well for this case. How can I implement this widget?
I have seen "Custom Homescreens" in previous Android SDK's. Should I have modify the Homescreen widget for doing this or is there any other way.
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Aug 26, 2010
I'm drawing a ProgressBar in a custom View (SurfaceView) to it's Canvas, and it's drawn as expected. Except that it's not animating, no matter what I do. My custom view is animated properly, but I cant change the progress of the ProgressBar.
I've created the ProgressBar like this:
CODE:..................
And I draw it something like this (slightly simplified):
CODE:........
And I've tried updating it's progress manually as well:
CODE:.................
Any ideas on what I need to do in order for my ProgressBar to animate or change it's progress.
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Nov 5, 2010
This is more of a question about animating than a specific problem coding. i need to fill in the broad strokes left by the research i've been doing.
What i'm trying to do:
The activity should load with only the a togglebutton visible. when the button is touched, a png will be animated to a certain position relative to the togglebutton. also, another button will slide in from off screen and slide off if/when the togglebutton is pressed again.
What i can't figure out:
I can draw an image, but only via xml. creating an imageview and setting the background programmatically does nothing.
When i draw from xml, i can't move the image when the togglebutton is pressed like i want to. when i call getPositionOnScreen() i get a null pointer, even though the complier can see i'm referring to the imageview described in both xml and in code.
I'm calling getPositionOnScreen because via xml, i have the image positioned behind the togglebutton so that it's not visible until the button has been pressed and the image starts moving. the idea is that with different screen sizes i won't know exactly where the view is until runtime. getPostionOnScreen allows me to get the coordinates of the imageview so i know where it has been positioned. when i have a start position, can tell it to "move up" on the screen from behind the togglebutton by simply adding to x or y until it's where i want.
This is the code to draw the image (inserted in the onCreate method).
CODE:.......
This is the code i'm using to animate. when the button is clicked, it calls this method on the view from the listener.
CODE:...............
I'm well aware that this is horribly wrong and won't work. what i need to understand is why.
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Oct 6, 2010
I have a RelativeLayout with a tiled background. Is there a way to make a tween animation to fade out the existing image and fade in a new one?
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May 19, 2009
I am using a SurfaceView, and wish to animate Drawables. All the animation tutorials I have seen concern using an ImageView, which as I understand is not a sensible approach from within a SurfaceView. Does anyone have any suggestions for doing frame-by-frame animation within a SurfaceView? Can it be done with openGL?
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Apr 27, 2010
Is there a way of being notified when a TransitionDrawable has finished its transition? I'm looking for a way to animate the background of a LinearLayout, switching it back and forth between two images thus creating a pulsating effect. TransitionDrawable works nicely, but....once. I tried stacking several 'item' in the XML defining the transition, but no luck. It justs fades from item 1 to item 2 and sits there. I'm wondering if I shouldn't implement a custom Animation.
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Feb 3, 2010
I'm trying to do something which seems simple. I want to have a map view, with a menu that slides up from the bottom of the screen where settings (for overlay) can be adjusted. However when I use a TranslateAnimation to affect the y position of the LinearLayout (which holds the menu), the buttons in the LinearLayout move, but there "hit area" stays in the same position as they were before the animation.
CODE:.........
I've also looked into tweening the view's marginTop value, but haven't even been able to determine how that would be done.
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Jan 25, 2010
Is there any way to query a root view of an activity for all of its child views even before the root view or its children have been inflated? I guess what I'm looking for is whether a view knows ahead of time what children it will have before it gets inflated, and can I get that list in some way. Bizarre I realize, but I think it will help me with some unconventional automation testing I'm working on. I haven't found anything in the API like this.
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Sep 29, 2010
I create a ProgressDialog in onCreateDialog() like so:
code:.........
Android, in its wisdom (or serious lack of it) decides to cache every dialog created through onCreateDialog(). Because of that, any subsequent call to showDialog(DIALOG_PROGRESS_ID) results in the same ProgressDialog instance being used but the animation has stopped working.
I've tried to re-set indeterminate in onPrepareDialog(), but that doesn't do anything. There is likewise no obvious method to call on the dialog instance that will reset the animation.
code:................
But maybe there is a way to get the ProgressBar itself and start it animating? so I tried the following after I asked this question:
code:........
But it didn't work either!
So, does anyone know if there is a way to restart animation on a ProgressDialog? If not, is there a way that I can force every showDialog() call to call onCreateDialog()? (this second question was answered by @TuomasR, but after pondering it I don't think this is a very good solution to my problem)
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Sep 2, 2010
Is there a way to animate drawables on a canvas using the android built-in animation classes?
Ive been modeling my test application, a game, after the example apps lunarlander and jetboy. They contain a lot of reusable code, but they manually update the drawable objects in real time. It seems like using the android animation built ins would be so much easier since they provide the type of animation I need¦a simple linear movement.
Is there a way to do this, or am I better off updating my canvas in real time much like the example apps.
If there is a way, could anyone get me started with some sample code? I am currently inheriting SurfaceView in my class.
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Sep 20, 2010
I am using android.hardware.Camera to get a preview and display it on a custom SurfaceView that implements SurfaceHolder.Callback.
I am trying to zoom in to the camera preview surface by a specified scale (not using the camera's digital zoom) but I can't seem to find a correct way to do it. I also need to be able to zoom out and scale down the preview.
I was hoping to be able to do this using a ScaleAnimation but it doesn't seem to work on SurfaceView, nor the FrameLayout containing the SurfaceView.
I also tried setting the size of the SurfaceView using setLayoutParams but that doesn't seem to work too well on various hardware and it would be tough to animate smoothly.
How to achieve this effect? Right now I am starting to think I might have to implement this using GLSurfaceView but I'm very unsure.
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Nov 22, 2010
I have an app that is working fine in 1.6 and up but crashing for apparently no reason in 1.5. The app suddenly quits with the following message...
CODE:............
This error happens when the app is 'idling' (ie not doing anything other than redrawing the screen). There is no state change and no user input. The error occurs after the same amount of elapsed time whatever I set the frame rate of the app to and occurs both on the emulator and device. Changing what I display on screen can stop the error but there appears to be no logic to this (in one instance not drawing a large image stops the error but elsewhere just drawing some text causes the app to crash in the same manner).
I am using SurfaceView for animations following the basic procedure in the Lunar Lander sample app.
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Mar 7, 2010
Let's say I have a LinearLayout, and I want to add a View to it, in my program from the Java code. What method is used for this? I'm not asking how it's done in XML, which I do know, but rather, how can I do something along the lines of (One View).add(Another View) Like one can do in Swing.
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Aug 30, 2010
I have a strange issue - from time to time the animation that should fade out my control (ImageButton) does not kick in immediately. I am using the fadeout animation to hide it and then in myListener on its end (onAnimationEnd) I put new resource as the image on the button.
Somewhere in my app code:
Animation a = AnimationUtils.loadAnimation(this,R.anim.fadeout); a.setAnimationListener(new myListener(location)); buttons[location].setAnimation(a); a.startNow(); // regardless if its start() or startnNow() it will work in most of the cases but not 100% reliable I actually can see in debug Log when its late, happens after few more clicks
Then in myListener.onAnimationEnd(Animation a):buttons[location].setImageResource(R.drawable.standard_button);
Seems there is a rule that the every 4th or 5th animation does not start ...
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Jan 22, 2012
I got to make a really nice menu, with all buttons working...but when I got to the part of creating a character and making it move, I just couldn't find info anywhere.
how to create a character, and to make it move left/right when I press some kind of button? ( and how to make that special button too)
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Jul 29, 2010
Is it possible in Android to get a callback when a Frame Animation (AnimationDrawable) has completed playing its frame sequence? I know when a Tween Animation has completed, it calls onAnimationEnd(), but is there something similar for frame by frame animations?
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