Develop Reference

android create custom progressbar like that

i want to create a progressbar in android like that image
i try to use
<animated-rotate xmlns:android="http://schemas.android.com/apk/res/android"
android:drawable="#drawable/loadingicon"
android:pivotX="50%"
android:pivotY="50%" />
but i think it not meet in my requirement

Here is a good example to customize progressbar: http://developer.android.com/reference/android/graphics/drawable/AnimationDrawable.html
U must draw all state of you future progress bar (img1.png, img2.png, img3.png, img4.png). put image to /res/drawable.
pb_animation.xml:
<animation-list android:id="#+id/myprogressrbar" android:oneshot="false">
<item android:drawable="#drawable/img1" android:duration="50" />
<item android:drawable="#drawable/img2" android:duration="50" />
<item android:drawable="#drawable/img3" android:duration="50" />
<item android:drawable="#drawable/img4" android:duration="50" />
</animation-list>
And then, in yor code:
ImageView img = (ImageView)findViewById(R.id.spinning_wheel_image);
img.setBackgroundResource(R.drawable.pb_animation);
AnimationDrawable frameAnimation = (AnimationDrawable) img.getBackground();
frameAnimation.start();

you could use an AnimationDrawable in combination with an ImageView and add a drawable for every state of your loading indicator, but a better way to this, is creating a new Style for a ProgressBar view (by extending de platform default style) and use your AnimationDrawable as loading indicator.
The Android styles are open source, so you can easily find them and extend them for your needs.
Good luck!

Button animations in Android

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.

Android Animation with onDraw or ImageView?

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;
}

Android transition animation

I want an animated gif, since this isn't possible in Android I am using individual frames in a transition.
except it seems like the transition class only will show two frames ever! I saw other animation methods but they didn't seem to apply to what I was doing, or seemed old and convulated like for an older infant android build
<transition xmlns:android="http://schemas.android.com/apk/res/android">
<item android:drawable="#drawable/activateanima"></item>
<item android:drawable="#drawable/activateanimb"></item>
<item android:drawable="#drawable/activateanimc"></item>
<item android:drawable="#drawable/activateanimc"></item>
<item android:drawable="#drawable/activateanimd"></item>
<item android:drawable="#drawable/activateanime"></item>
<item android:drawable="#drawable/activateanimf"></item>
<item android:drawable="#drawable/activateanimg"></item>
</transition>
How do I animate an image to behave like an animated gif, in place. no rotations or translations here. Using android 2.1+

Are you after a Frame animation? See: here. This will play a standing still animation.
Example from above site:
XML file saved at res/anim/rocket.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/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>
To use:
ImageView rocketImage = (ImageView) findViewById(R.id.rocket_image);
rocketImage.setBackgroundResource(R.drawable.rocket_thrust);
rocketAnimation = (AnimationDrawable) rocketImage.getBackground();
rocketAnimation.start();

Just use a view flipper to flip between the images. Just define your in and out animations to be 0seconds long and they should be instantianous. (but use alpha to be sure). View flipper has the benefit of also auto animating and auto starting

Android: creating an animation on touch

I wanted to create a frame by frame animation when the user touches the screen. The images I've decided to use should appear, animate and disappear at the touched coordinates.
<animation-list xmlns:android=
"http://schemas.android.com/apk/res/android"
android:oneshot="true">
<item android:drawable="#drawable/animation1" android:duration="50" />
<item android:drawable="#drawable/animation2" android:duration="50" />
<item android:drawable="#drawable/animation3" android:duration="50" />
<item android:drawable="#drawable/animation4" android:duration="50" />
</animation-list>
I attempted to do this via drawable.animationdrawable but it seems like I needed to have the image on screen in the main.xml before I can do this. Is there a way I can do it without having this code in the main.xml?
<ImageView
android:id="#+id/animation1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>

you can easily set source for your ImageView using java code. Get reference to imageview in xmllayout. for eg. imageview is image
then do image.setResource(a drawable to be passed here).

Create a view + add visibilty_GONE + add set_anim property, as you have defined your animation file.
Use some onDown(MotionEvent e).
Inside this onDown, set your view_visibilty_VISIBLE.