I'm trying to perform frame by frame animation in android. For this task I created an xml file called "anim.xml" like this:
<?xml version="1.0" encoding="utf-8"?>
<animation-list xmlns:android="http://schemas.android.com/apk/res/android"
android:oneshot="false">
<item android:drawable="#drawable/square0" android:duration="100" />
<item android:drawable="#drawable/square1" android:duration="100" />
<item android:drawable="#drawable/square2" android:duration="100" />
<item android:drawable="#drawable/square3" android:duration="100" />
<item android:drawable="#drawable/square4" android:duration="100" />
<item android:drawable="#drawable/square5" android:duration="100" />
</animation-list>
Then at a frame layout that I have defined, I tried to set it as background and start it at onCreate like this:
FrameLayout imgView = (FrameLayout)findViewById(R.id.frameLayout1);
imgView.setBackgroundResource(R.drawable.anim);
AnimationDrawable anim = (AnimationDrawable) imgView.getBackground();
anim.start();
What I'm experiencing is the first frame only, but what I'm going for is an animation of squares to be on a loop. Do you have any opinions regarding what I have done wrong ?
Cheers.
To me, Matt's solution seems a little overpowered for this case. You can simply move your call of the start() method to the onWindowFocusChanged() method because at that point the AnimationDrawable is fully attached to the window and can actually be started. Like this:
#Override
public void onWindowFocusChanged(boolean hasFocus)
{
super.onWindowFocusChanged(hasFocus);
anim.start();
}
Do all the other stuff in your onCreate() method and make the AnimationDrawable a class variable, so you can access it from onWindowFocusChanged() method.
I've experience issues before when trying to get animations to start in the onCreate method. Try repalcing your last line with something like:
imgView.post(new Runnable()
{
#Override
public void run()
{
anim.start();
}
});
This will essentialy make you animation start after onCreate has executed.
Related
Is there any way to make a ProgressBar like this.
Or can it be achieved by customizing RatingBar as an indicator?
If so, how would I be able to attach the lines in between the circles?
You can achieve this by using different images which represents different stages of your process
keep an imageview with visibility gone and make it visible when you want to display the same
in your drawable folder keep an xml like the following progressanimation.xml
<?xml version="1.0" encoding="utf-8"?>
<animation-list xmlns:android="http://schemas.android.com/apk/res/android"
android:oneshot="false">
<item android:drawable="#drawable/progressone" android:duration ="400" />
<item android:drawable="#drawable/progresstwo" android:duration="400" />
<item android:drawable="#drawable/progressthree" android:duration="400" />
<item android:drawable="#drawable/progressfour" android:duration="400" />
</animation-list>
and use this as background of your ImageView like follows
iv.setVisibility(View.VISIBLE);
iv.setBackgroundResource(R.drawable.progressanimation);
final AnimationDrawable mailAnimation = (AnimationDrawable) iv
.getBackground();
iv.post(new Runnable() {
public void run() {
if (mailAnimation != null)
mailAnimation.start();
System.out.println("anim wrkingggg");
}
});
here iv is your imageview.This code will change the background automatically.You can make the runnable run with your own timelimit.
Today I got, as I suppose, very interesting question. On my job we are creating a dating service and one of the main features will be the screen, where photos of different girls (or guys) are shown and the user press either "Hot" or "Not" button. Both of these buttons are displayed below the photo on the screen.
Our analytics say that we should implement some kind of "gaming" mechanics, so the want such a thing: when user press, for example, "Not" button - it starts freezing and covering with ice, then it breaks and then the next photo is shown. That is not scale or rotate or translate animation... the button itself, its content should be changing over some small period of time (a second or two maybe).
That scares me a lot, because when I'm thinking about scaling these buttons on different devices, and different troubles with ninepatch and hand-made-frames animations I'm likely going to make.
Is it possible to make such thing? Or maybe there are any kind of workarounds or something.
Make images for your animation and keep in a folder in png format.
Animate those images with code below.
<animation-list xmlns:android="http://schemas.android.com/apk/res/android"
android:oneshot="true">
<item android:drawable="#drawable/rocket_thrust1" android:duration="200" />
<item android:drawable="#drawable/rocket_thrust2" android:duration="200" />
<item android:drawable="#drawable/rocket_thrust3" android:duration="200" />
</animation-list>
Then
AnimationDrawable rocketAnimation;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
ImageView rocketImage = (ImageView) findViewById(R.id.rocket_image);
rocketImage.setBackgroundResource(R.drawable.rocket_thrust);
rocketAnimation = (AnimationDrawable) rocketImage.getBackground();
}
public boolean onTouchEvent(MotionEvent event) {
if (event.getAction() == MotionEvent.ACTION_DOWN) {
rocketAnimation.start();
return true;
}
return super.onTouchEvent(event);
}
Create list of images in drawable folder:
<?xml version="1.0" encoding="utf-8"?>
<animation-list xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/loading"
android:oneshot="false" >
<item android:drawable="#drawable/preloader_01" android:duration="50" />
<item android:drawable="#drawable/preloader_02" android:duration="50" />
<item android:drawable="#drawable/preloader_03" android:duration="50" />
<item android:drawable="#drawable/preloader_04" android:duration="50" />
Use ImageView img instead of button and set the list as background in xml, then in code use AnimationDrawable to start the animation
AnimationDrawable frameAnimation = (AnimationDrawable) img.getBackground();
// Start the animation (looped playback by default).
frameAnimation.start();`
You can animate Alpha, location and just about any property of a button using ObjectAnimators and ValueAnimators.
If you want custom animations such as the ice effect, you'll have to make these yourself.
I want to create an android game. Everytime someone touches the display the player should go up, and if he releases the player should fall.
With the help of many tutorials I made it work but now I want to animate it and I'm stuck. That means the image of the player should be changed every half a second. Additionally an animated rotation should be created when the player goes up.
However (after hours of googling) I couldnt find any helpful answer to my problem. The Android Developers site talks about creating an ImageView and a XML file. But thats where I'm stuck: I dont have an ImageView, my player (for which I used a PNG file) is simply created by the onDraw() method:
public void onDraw(Canvas canvas) {
for (Sprite s : sprites) {
canvas.drawBitmap(s.getGraphic(), s.getLocation().x,
s.getLocation().y, null);
}
}
Now I wanted to ask how I should do the animation and the animated rotation. Should I start off with an ImageView or can I somehow "convert" the onDraw method to an ImageView? Or is there another way to do the animation and animated rotation without an ImageView?
Secondly, if I had to create the ImageView I don't understand how I can make the player "dynamic", i.e.: changing the position when someone touches the display.
Thanks in advance :)
EDIT:
Ok, I created my animation.xml file in the drawable folder:
<animation-list xmlns:android="http://schemas.android.com/apk/res/android" android:oneshot="false" android:id="#+id/splashAnimation">
<item android:drawable="#drawable/ship" android:duration="200" />
<item android:drawable="#drawable/ship_2" android:duration="200" />
</animation-list>
and in my main file I added:
ImageView img = (ImageView) findViewById(R.id.splashAnimation);
img.setBackgroundResource(R.drawable.animation);
ship_anim= (AnimationDrawable) img.getBackground();
ship_anim.start();
However, now I get the error message: NullPointerException
Where is the Problem?
if you have drawables that describe animation, you can always create xml in your drawable folder like this than add this as imageView to the layout
<?xml version="1.0" encoding="utf-8"?>
<animation-list xmlns:android="http://schemas.android.com/apk/res/android" >
<item android:drawable="#drawable/img1" android:duration="100" />
<item android:drawable="#drawable/img2" android:duration="100" />
<item android:drawable="#drawable/img3" android:duration="100" />
<item android:drawable="#drawable/mimg4" android:duration="100" />
<item android:drawable="#drawable/img5" android:duration="100" />
</animation-list>
The code for it would look like this:
myAnimation = (AnimationDrawable) findViewById(R.id.animation);
Add just event handler than
if (!isPlaying)
{
playDrawableAnimation();
isPlaying = true;
} else
{
faceAnimation.stop();
isPlaying = false;
}
I have a checkbox that should look like a green light when checked and a red blinking light when unchecked. To do this I created a selector called connected_selector.xml.
<?xml version="1.0" encoding="utf-8"?>
<selector
xmlns:android="http://schemas.android.com/apk/res/android">
<item android:state_checked="true" android:drawable="#drawable/green_button" />
<item android:state_checked="false" android:drawable="#drawable/red_button_blinking" />
<item android:drawable="#drawable/red_button_blinking" />
</selector>
The green_button is simply a png and the red_button_blinking is an animation-list of pngs.
<?xml version="1.0" encoding="utf-8"?>
<animation-list
xmlns:android="http://schemas.android.com/apk/res/android" android:oneshot="false">
<item android:drawable="#drawable/red_button" android:duration="500" />
<item android:drawable="#drawable/red_button_lit" android:duration="500" />
</animation-list>
The checkbox's background is set to #drawable/connected_selector. If the checkbox is initially unchecked, it doesn't blink, it just shows the #drawable/red_button. However if I check the box and then uncheck it, the checkbox will animate correctly.
How can I make the animation start initially since the checkbox will be initially unchecked? I guess I could try to start the animation manually in code, but I don't think that should be necessary.
Okay, I found an ugly, dirty hack to get around this. Note that I don't have the slightest clue why this happens, just a way around this. It is probably not even a generic way since different devices will have different loading times.
I execute the following workaround in onPostResume() to minimize the necessary delay time.
if(onOffStatus) {
// SLEEP 0.5 SECONDS HERE ...
new Handler().postDelayed(new Runnable() {
public void run() {
switcher.setBackgroundResource(R.drawable.button_state_anim);
// Get the background, which has been compiled to an AnimationDrawable object.
AnimationDrawable frameAnimation = (AnimationDrawable) switcher.getBackground();
// Start the animation (looped playback by default).
frameAnimation.start();
}
}, 500); // Actual required time will probably be dependent on device performance
}
It ain't pretty but I'm going with this until I find something better. Let me know if I overlooked something here.
I want to create an animation for the text like on Airport the flight schedule board does. Dropping from top and change the text on it. Here is the image. So When I click on button the text on the image should change with the said animation. Does it possible with android?
Please guide me how can I achieve this kind of animation in android?
EDIT:
<?xml version="1.0" encoding="utf-8"?>
<animation-list xmlns:android="http://schemas.android.com/apk/res/android"
android:oneshot="false">
<item android:drawable="#drawable/clockbg1" android:duration="150" />
<item android:drawable="#drawable/clockbg2" android:duration="150" />
<item android:drawable="#drawable/clockbg3" android:duration="150" />
<item android:drawable="#drawable/clockbg4" android:duration="150" />
<item android:drawable="#drawable/clockbg5" android:duration="150" />
<item android:drawable="#drawable/clockbg6" android:duration="150" />
</animation-list>
My Activity Class:
public class XMLAnimation extends Activity {
private static AnimationDrawable animation;
private ImageView refresh;
#Override
public void onCreate(Bundle icicle) {
super.onCreate(icicle);
setContentView(R.layout.main);
refresh = (ImageView) findViewById(R.id.simple_anim);
refresh.setBackgroundResource(R.drawable.loader_animation);
animation = (AnimationDrawable) refresh.getBackground();
}
#Override
public void onWindowFocusChanged(boolean hasFocus) {
super.onWindowFocusChanged(hasFocus);
animation.start();
}
Now How to place vertically animated text on this images so it looks like the animation I wanted to create?
Thanks,
AndroidVogue
It isn't exactly the thing you want, but there's a nice 3-part tutorial by Kevin Dion that starts here for creating a custom odometer widget that looks something like what you want. It should help get you started.
To get the effect of the top half of the letters falling down (if that's what you want), you can fake it by drawing the letter into a buffer image and then scaling the vertical extent of the letter to get a foreshortening effect.
I got working library. Originally developed by someone else but I provided support for down version from Froyo. I hope this can help you out.
AbhanFlipView
Ref:
Library Developed By: Emil Sjölander
Animations Created By: Jake Wharton
UPDATE
It has a document named HowTo.txt shows how to integrate.
Thanks.