I am starting an activity and would rather have a alpha fade-in for startActivity(), and a fade-out for the finish(). How can I go about this in the Android SDK?
Starting from API level 5 you can call overridePendingTransition immediately to specify an explicit transition animation:
startActivity();
overridePendingTransition(R.anim.hold, R.anim.fade_in);
or
finish();
overridePendingTransition(R.anim.hold, R.anim.fade_out);
See themes on android: http://developer.android.com/guide/topics/ui/themes.html.
Under themes.xml there should be android:windowAnimationStyle where you can see the declaration of the style in styles.xml.
Example implementation:
<style name="AppTheme" parent="...">
...
<item name="android:windowAnimationStyle">#style/WindowAnimationStyle</item>
</style>
<style name="WindowAnimationStyle">
<item name="android:windowEnterAnimation">#android:anim/fade_in</item>
<item name="android:windowExitAnimation">#android:anim/fade_out</item>
</style>
In the same statement in which you execute finish(), execute your animation there too. Then, in the new activity, run another animation. See this code:
fadein.xml
<set xmlns:android="http://schemas.android.com/apk/res/android"
android:fillAfter="true">
<alpha android:fromAlpha="1.0"
android:toAlpha="0.0"
android:duration="500"/> //Time in milliseconds
</set>
In your finish-class
private void finishTask() {
if("blabbla".equals("blablabla"){
finish();
runFadeInAnimation();
}
}
private void runFadeInAnimation() {
Animation a = AnimationUtils.loadAnimation(this, R.anim.fadein);
a.reset();
LinearLayout ll = (LinearLayout) findViewById(R.id.yourviewhere);
ll.clearAnimation();
ll.startAnimation(a);
}
fadeout.xml
<set xmlns:android="http://schemas.android.com/apk/res/android"
android:fillAfter="true">
<alpha android:fromAlpha="0.0"
android:toAlpha="1.0"
android:duration="500"/>
</set>
In your new Activity-class you create a similiar method like the runFadeAnimation I wrote and then you run it in onCreate and don't forget to change the resources id to fadeout.
Use overridePendingTransition
startActivity();
overridePendingTransition(R.anim.fadein, R.anim.fadeout);
fadein.xml
<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">
<alpha xmlns:android="http://schemas.android.com/apk/res/android"
android:interpolator="#android:anim/accelerate_interpolator"
android:fromAlpha="0.0" android:toAlpha="1.0" android:duration="500" />
</set>
fadeout.xml
<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">
<alpha xmlns:android="http://schemas.android.com/apk/res/android"
android:interpolator="#android:anim/anticipate_interpolator"
android:fromAlpha="1.0" android:toAlpha="0.0" android:duration="500" />
</set>
For fadeIn and fadeOut, only add this after super.onCreate(savedInstanceState) in your new Activity class. You don't need to create something else (No XML, no anim folder, no extra function).
overridePendingTransition(R.anim.abc_fade_in,R.anim.abc_fade_out);
If you always want to the same transition animation for the activity
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
overridePendingTransition(android.R.anim.fade_in, android.R.anim.fade_out);
#Override
protected void onPause() {
super.onPause();
if (isFinishing()) {
overridePendingTransition(android.R.anim.fade_in, android.R.anim.fade_out);
}
}
You can simply create a context and do something like below:-
private Context context = this;
And your animation:-
((Activity) context).overridePendingTransition(R.anim.abc_slide_in_bottom,R.anim.abc_slide_out_bottom);
You can use any animation you want.
I wanted to use the styles.xml solution, but it did not work for me with activities.
Turns out that instead of using android:windowEnterAnimation and android:windowExitAnimation, I need to use the activity animations like this:
<style name="ActivityAnimation.Vertical" parent="">
<item name="android:activityOpenEnterAnimation">#anim/enter_from_bottom</item>
<item name="android:activityOpenExitAnimation">#anim/exit_to_bottom</item>
<item name="android:activityCloseEnterAnimation">#anim/enter_from_bottom</item>
<item name="android:activityCloseExitAnimation">#anim/exit_to_bottom</item>
<item name="android:windowEnterAnimation">#anim/enter_from_bottom</item>
<item name="android:windowExitAnimation">#anim/exit_to_bottom</item>
</style>
Which I then reference in my theme:
<style name="AppTheme">
...
<item name="android:windowAnimationStyle">#style/ActivityAnimation.Vertical</item>
...
</style>
Also, for some reason this only worked from Android 8 and above.
I added the following code to my BaseActivity, to fix it for the API levels below:
override fun finish() {
super.finish()
setAnimationsFix()
}
/**
* The activityCloseExitAnimation and activityCloseEnterAnimation properties do not work correctly when applied from the theme.
* So in this fix, we retrieve them from the theme, and apply them.
* #suppress Incorrect warning: https://stackoverflow.com/a/36263900/1395437
*/
#SuppressLint("ResourceType")
private fun setAnimationsFix() {
// Retrieve the animations set in the theme applied to this activity in the manifest..
var activityStyle = theme.obtainStyledAttributes(intArrayOf(android.R.attr.windowAnimationStyle))
val windowAnimationStyleResId = activityStyle.getResourceId(0, 0)
activityStyle.recycle()
// Now retrieve the resource ids of the actual animations used in the animation style pointed to by
// the window animation resource id.
activityStyle = theme.obtainStyledAttributes(windowAnimationStyleResId, intArrayOf(android.R.attr.activityCloseEnterAnimation, android.R.attr.activityCloseExitAnimation))
val activityCloseEnterAnimation = activityStyle.getResourceId(0, 0)
val activityCloseExitAnimation = activityStyle.getResourceId(1, 0)
activityStyle.recycle()
overridePendingTransition(activityCloseEnterAnimation, activityCloseExitAnimation);
}
// CREATE anim
// CREATE animation,animation2 xml // animation like fade out
Intent myIntent1 = new Intent(getApplicationContext(), Attend.class);
Bundle bndlanimation1 = ActivityOptions.makeCustomAnimation(getApplicationContext(),
R.anim.animation, R.anim.animation2).toBundle();
startActivity(myIntent1, bndlanimation1);
Most of the answers are pretty correct, but some of them are deprecated such as when using R.anim.hold and some of them are just elaboratig the process.
So, you can use:
startActivity(intent);
overridePendingTransition(android.R.anim.fade_in, android.R.anim.fade_out);
Related
I have two dialog fragments:
I need to make a flip transition between them
I checked the android developer site, but it explains about the fragment transition https://developer.android.com/training/animation/reveal-or-hide-view.html#CardFlip
How can I implement the same in dialog fragment?
An example showing how to set a animation to a dialog fragmnet
Being DialogFragment a wrapper for the Dialog class, you should set a theme to your base Dialog to get the animation you want:
public class CustomDialogFragment extends DialogFragment implements OnEditorActionListener
{
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState)
{
return super.onCreateView(inflater, container, savedInstanceState);
}
#Override
public Dialog onCreateDialog(Bundle savedInstanceState)
{
// Set a theme on the dialog builder constructor!
AlertDialog.Builder builder =
new AlertDialog.Builder( getActivity(), R.style.MyCustomTheme );
builder
.setTitle( "Your title" )
.setMessage( "Your message" )
.setPositiveButton( "OK" , new DialogInterface.OnClickListener()
{
#Override
public void onClick(DialogInterface dialog, int which) {
dismiss();
}
});
return builder.create();
}
}
Then you just need to define the theme that will include your desired animation. In styles.xml add your custom theme:
<style name="MyCustomTheme" parent="#android:style/Theme.Panel">
<item name="android:windowAnimationStyle">#style/MyAnimation.Window</item>
</style>
<style name="MyAnimation.Window" parent="#android:style/Animation.Activity">
<item name="android:windowEnterAnimation">#anim/anim_in</item>
<item name="android:windowExitAnimation">#anim/anim_out</item>
</style>
Now add the animation files in the res/anim folder:
( the android:pivotY is the key )
anim_in.xml
<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">
<scale
android:interpolator="#android:anim/linear_interpolator"
android:fromXScale="0.0"
android:toXScale="1.0"
android:fromYScale="0.0"
android:toYScale="1.0"
android:fillAfter="false"
android:startOffset="200"
android:duration="200"
android:pivotX = "50%"
android:pivotY = "-90%"
/>
<translate
android:fromYDelta="50%"
android:toYDelta="0"
android:startOffset="200"
android:duration="200"
/>
</set>
anim_out.xml
<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">
<scale
android:interpolator="#android:anim/linear_interpolator"
android:fromXScale="1.0"
android:toXScale="0.0"
android:fromYScale="1.0"
android:toYScale="0.0"
android:fillAfter="false"
android:duration="200"
android:pivotX = "50%"
android:pivotY = "-90%"
/>
<translate
android:fromYDelta="0"
android:toYDelta="50%"
android:duration="200"
/>
</set>
Finally, the tricky thing here is to get your animation grow from the center of each row. I suppose the row is filling the screen horizontally so, on one hand the android:pivotX value will be static. On the other hand, you can't modify the android:pivotY value programmatically.
What I suggest is, you define several animations each of which having a different percentage value on the android:pivotY attribute (and several themes referencing those animations). Then, when the user taps the row, calculate the Y position in percentage of the row on the screen. Knowing the position in percentage, assign a theme to your dialog that has the appropriate android:pivotY value.
It is not a perfect solution but could do the trick for you. If you don't like the result, then I would suggest forgetting the DialogFragment and animating a simple View growing from the exact center of the row.
I want my launcher activity to slide in from the right to the left when it is opened or returned to from a previous activity. It currently slides from the right to the left when it switches to another activity, but not when it is opened or the back button is pressed.
Here is the relevant XML for the style that is applied to my launcher activity:
styles.xml
<item name="android:windowContentTransitions">true</item>
<item name="android:windowEnterTransition">#android:transition/slide_left</item>
<item name="android:windowExitTransition">#android:transition/slide_left</item>
<item name="android:windowReenterTransition">#android:transition/slide_right</item>
<item name="android:windowReturnTransition">#android:transition/slide_left</item>
My activity moves to the next activity when a button is clicked. This is my onClickListener:
Button register = (Button)findViewById(R.id.registerBtn);
register.setOnClickListener(new Button.OnClickListener(){
public void onClick(View v) {
Intent i = new Intent(LoginActivity.this, RegisterActivity.class);
startActivity(i, ActivityOptions.makeSceneTransitionAnimation(LoginActivity.this).toBundle());
}
});
I believe the ActivityOptions.makeSceneTransitionAnimation method may have something to do with why the exit transition works, but how do I apply this for an enter transition?
If your activity is AppCompatActivity, try this:
Intent intent = new Intent(LoginActivity.this, RegisterActivity.class);
Bundle bundle = ActivityOptionsCompat.makeSceneTransitionAnimation(LoginActivity.this).toBundle();
ActivityCompat.startActivity(RegisterActivity.this, intent, bundle);
You can use this to start a new activity with transition
startActivity(new Intent(this, NewActivity.class));
overridePendingTransition(R.anim.slide_in_right, R.anim.slide_out_left);
Create file res/anim/slide_in_right.xml
<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android"
android:shareInterpolator="false" >
<translate android:duration="1000" android:fromXDelta="100%" android:toXDelta="0%" />
<alpha android:duration="1000" android:fromAlpha="0.0" android:toAlpha="1.0" />
</set>
Create file res/anim/slide_out_left.xml
<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android"
android:shareInterpolator="false" >
<translate android:duration="2000" android:fromXDelta="0%" android:toXDelta="-100%"/>
<alpha android:duration="2000" android:fromAlpha="1.0" android:toAlpha="0.0" />
</set>
You can make your activity slide accordingly as per requirements using this method.
I'm showing a DialogFragment when the user taps on a row in a ListView. I'd like to animate the showing of the dialog so that it grows from the center of the row. A similar effect can be seen when opening a folder from the launcher.
One idea that I've had is a combination of TranslateAnimation and ScaleAnimation. Is there another way?
Being DialogFragment a wrapper for the Dialog class, you should set a theme to your base Dialog to get the animation you want:
public class CustomDialogFragment extends DialogFragment implements OnEditorActionListener
{
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState)
{
return super.onCreateView(inflater, container, savedInstanceState);
}
#Override
public Dialog onCreateDialog(Bundle savedInstanceState)
{
// Set a theme on the dialog builder constructor!
AlertDialog.Builder builder =
new AlertDialog.Builder( getActivity(), R.style.MyCustomTheme );
builder
.setTitle( "Your title" )
.setMessage( "Your message" )
.setPositiveButton( "OK" , new DialogInterface.OnClickListener()
{
#Override
public void onClick(DialogInterface dialog, int which) {
dismiss();
}
});
return builder.create();
}
}
Then you just need to define the theme that will include your desired animation. In styles.xml add your custom theme:
<style name="MyCustomTheme" parent="#android:style/Theme.Panel">
<item name="android:windowAnimationStyle">#style/MyAnimation.Window</item>
</style>
<style name="MyAnimation.Window" parent="#android:style/Animation.Activity">
<item name="android:windowEnterAnimation">#anim/anim_in</item>
<item name="android:windowExitAnimation">#anim/anim_out</item>
</style>
Now add the animation files in the res/anim folder:
( the android:pivotY is the key )
anim_in.xml
<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">
<scale
android:interpolator="#android:anim/linear_interpolator"
android:fromXScale="0.0"
android:toXScale="1.0"
android:fromYScale="0.0"
android:toYScale="1.0"
android:fillAfter="false"
android:startOffset="200"
android:duration="200"
android:pivotX = "50%"
android:pivotY = "-90%"
/>
<translate
android:fromYDelta="50%"
android:toYDelta="0"
android:startOffset="200"
android:duration="200"
/>
</set>
anim_out.xml
<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">
<scale
android:interpolator="#android:anim/linear_interpolator"
android:fromXScale="1.0"
android:toXScale="0.0"
android:fromYScale="1.0"
android:toYScale="0.0"
android:fillAfter="false"
android:duration="200"
android:pivotX = "50%"
android:pivotY = "-90%"
/>
<translate
android:fromYDelta="0"
android:toYDelta="50%"
android:duration="200"
/>
</set>
Finally, the tricky thing here is to get your animation grow from the center of each row. I suppose the row is filling the screen horizontally so, on one hand the android:pivotX value will be static. On the other hand, you can't modify the android:pivotY value programmatically.
What I suggest is, you define several animations each of which having a different percentage value on the android:pivotY attribute (and several themes referencing those animations). Then, when the user taps the row, calculate the Y position in percentage of the row on the screen. Knowing the position in percentage, assign a theme to your dialog that has the appropriate android:pivotY value.
It is not a perfect solution but could do the trick for you. If you don't like the result, then I would suggest forgetting the DialogFragment and animating a simple View growing from the exact center of the row.
Check it out this code, it works for me
// Slide up animation
<?xml version="1.0" encoding="utf-8"?> <set xmlns:android="http://schemas.android.com/apk/res/android" >
<translate
android:duration="#android:integer/config_mediumAnimTime"
android:fromYDelta="100%"
android:interpolator="#android:anim/accelerate_interpolator"
android:toXDelta="0" />
</set>
// Slide dowm animation
<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android" >
<translate
android:duration="#android:integer/config_mediumAnimTime"
android:fromYDelta="0%p"
android:interpolator="#android:anim/accelerate_interpolator"
android:toYDelta="100%p" />
</set>
// Style
<style name="DialogAnimation">
<item name="android:windowEnterAnimation">#anim/slide_up</item>
<item name="android:windowExitAnimation">#anim/slide_down</item>
</style>
// Inside Dialog Fragment
#Override
public void onActivityCreated(Bundle arg0) {
super.onActivityCreated(arg0);
getDialog().getWindow()
.getAttributes().windowAnimations = R.style.DialogAnimation;
}
DialogFragment has a public getTheme() method that you can over ride for this exact reason. This solution uses less lines of code:
public class MyCustomDialogFragment extends DialogFragment{
...
#Override
public int getTheme() {
return R.style.MyThemeWithCustomAnimation;
}
}
To get a full-screen dialog with animation, write the following ...
Styles:
<style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
<item name="colorPrimary">#color/colorPrimary</item>
<item name="colorPrimaryDark">#color/colorPrimaryDark</item>
<item name="colorAccent">#color/colorAccent</item>
<item name="actionModeBackground">?attr/colorPrimary</item>
<item name="windowActionModeOverlay">true</item>
</style>
<style name="AppTheme.NoActionBar">
<item name="windowActionBar">false</item>
<item name="windowNoTitle">true</item>
</style>
<style name="AppTheme.NoActionBar.FullScreenDialog">
<item name="android:windowAnimationStyle">#style/Animation.WindowSlideUpDown</item>
</style>
<style name="Animation.WindowSlideUpDown" parent="#android:style/Animation.Activity">
<item name="android:windowEnterAnimation">#anim/slide_up</item>
<item name="android:windowExitAnimation">#anim/slide_down</item>
</style>
res/anim/slide_up.xml
<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android"
android:shareInterpolator="#android:interpolator/accelerate_quad">
<translate
android:duration="#android:integer/config_shortAnimTime"
android:fromYDelta="100%"
android:toYDelta="0%"/>
</set>
res/anim/slide_down.xml
<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android"
android:shareInterpolator="#android:interpolator/accelerate_quad">
<translate
android:duration="#android:integer/config_shortAnimTime"
android:fromYDelta="0%"
android:toYDelta="100%"/>
</set>
Java code:
public class MyDialog extends DialogFragment {
#Override
public int getTheme() {
return R.style.AppTheme_NoActionBar_FullScreenDialog;
}
}
private void showDialog() {
FragmentTransaction fragmentTransaction = getSupportFragmentManager().beginTransaction();
Fragment previous = getSupportFragmentManager().findFragmentByTag(MyDialog.class.getName());
if (previous != null) {
fragmentTransaction.remove(previous);
}
fragmentTransaction.addToBackStack(null);
MyDialog dialog = new MyDialog();
dialog.show(fragmentTransaction, MyDialog.class.getName());
}
In DialogFragment, custom animation is called onCreateDialog. 'DialogAnimation' is custom animation style in previous answer.
public Dialog onCreateDialog(Bundle savedInstanceState)
{
final Dialog dialog = super.onCreateDialog(savedInstanceState);
dialog.getWindow().getAttributes().windowAnimations = R.style.DialogAnimation;
return dialog;
}
Use decor view inside onStart in your dialog fragment
#Override
public void onStart() {
super.onStart();
final View decorView = getDialog()
.getWindow()
.getDecorView();
decorView.animate().translationY(-100)
.setStartDelay(300)
.setDuration(300)
.start();
}
If you want to work over APIs you have to do inside your DialogFragemnt->onStart and not inside onCreateDialog
#Override
public void onStart()
{
if (getDialog() == null)
{
return;
}
getDialog().getWindow().setWindowAnimations(
R.style.DlgAnimation);
super.onStart();
}
Note: This is just a complement to other answers.
No matter which the solutions you pick you might have the same problem as me.
I need to UNINSTALL the game from my development device before installing the new version for the animation changes to take effect.
I am not sure why but I guess it has to do with the optimized deployment on Android studio not recognizing the changes.
Have you looked at Android Developers Training on Zooming a View? Might be a good starting point.
You probably want to create a custom class extending DialogFragment to get this working.
Also, take a look at Jake Whartons NineOldAndroids for Honeycomb Animation API compatibility all the way back to API Level 1.
Add this code on values anim
<scale
android:duration="#android:integer/config_longAnimTime"
android:fromXScale="0.2"
android:fromYScale="0.2"
android:toXScale="1.0"
android:toYScale="1.0"
android:pivotX="50%"
android:pivotY="50%"/>
<alpha
android:fromAlpha="0.1"
android:toAlpha="1.0"
android:duration="#android:integer/config_longAnimTime"
android:interpolator="#android:anim/accelerate_decelerate_interpolator"/>
call on styles.xml
<style name="DialogScale">
<item name="android:windowEnterAnimation">#anim/scale_in</item>
<item name="android:windowExitAnimation">#anim/scale_out</item>
</style>
On java code: set Onclick
public void onClick(View v) {
fab_onclick(R.style.DialogScale, "Scale" ,(Activity) context,getWindow().getDecorView().getRootView());
// Dialogs.fab_onclick(R.style.DialogScale, "Scale");
}
setup on method:
alertDialog.getWindow().getAttributes().windowAnimations = type;
How to start an activity after the animation has ended.
I have added android:oneshot="true" in the xml but how to start a new activity
after this animation has stopped.I have attached the entire code below.
Please let me know how to start new activity.
package com.appsolut.example.animation;
import android.app.Activity;
import android.content.Intent;
import android.graphics.drawable.AnimationDrawable;
import android.os.Bundle;
import android.widget.ImageView;
public class Animation extends Activity {
ImageView animation;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
}
#Override
public void onWindowFocusChanged (boolean hasFocus) {
super.onWindowFocusChanged(hasFocus);
AnimationDrawable frameAnimation =
(AnimationDrawable) animation.getBackground();
if(hasFocus) {
frameAnimation.start();
} else {
frameAnimation.stop();
}
}
public void onStart() {
{
super.onStart();
animation = (ImageView)findViewById(R.id.imageAnimation);
animation.setBackgroundResource(R.drawable.animation);
}
}
}
animation.xml
<?xml version="1.0" encoding="utf-8"?>
<animation-list xmlns:android="http://schemas.android.com/apk/res/android"
android:oneshot="true" >
<item android:drawable="#drawable/img00000" android:duration="500" />
<item android:drawable="#drawable/img00001" android:duration="500" />
<item android:drawable="#drawable/img00002" android:duration="500" />
<item android:drawable="#drawable/img00003" android:duration="500" />
<item android:drawable="#drawable/img00004" android:duration="500" />
<item android:drawable="#drawable/img00005" android:duration="500" />
<item android:drawable="#drawable/img00006" android:duration="500" />
<item android:drawable="#drawable/img00007" android:duration="500" />
<item android:drawable="#drawable/img00008" android:duration="500" />
<item android:drawable="#drawable/img00009" android:duration="500" />
<item android:drawable="#drawable/img00010" android:duration="500" />
</animation-list>
Use and AnimationListener on your animation to do whatever you want on its onAnimationEnd() method.
After your animation call create a new Intent (From the Intent class).
Intent myIntent = new Intent(context, newActivity.class);
startActivity(myIntent);
Context can be getContext() or getBaseContext()
This should work. Also dont't forget to declare your new activity in the AndroidManifest or the application will crash!
Hope this helped.
Use the method hasEnded() to check if ended and then if it has then call your intent to open up the new activity.
It should work
Best Regards
I'm trying to get the AnimationDrawable on my Android app to repeat.
I configured the android:oneshot on false. (tried both with java and with XML)
Still, whenever the animation is played, once it's done, it goes back to the first frame, and stops
This is my XML file
<?xml version="1.0" encoding="utf-8"?>
<animation-list xmlns:android="http://schemas.android.com/apk/res/android" android:id="#+id/network_scanning" android:oneshot="false">
<item android:drawable="#drawable/network_wireless_0" android:duration="300" />
<item android:drawable="#drawable/network_wireless_1" android:duration="300" />
<item android:drawable="#drawable/network_wireless_2" android:duration="300" />
<item android:drawable="#drawable/network_wireless_3" android:duration="300" />
<item android:drawable="#drawable/network_wireless_4" android:duration="300" />
</animation-list>
and this is the code to start the animation:
#Override
public void onWindowFocusChanged(boolean hasFocus)
{
super.onWindowFocusChanged(hasFocus);
LinearLayout network = (LinearLayout) findViewById(R.id.wifi_anim);
AnimationDrawable anim = (AnimationDrawable) network.getBackground();
if (hasFocus)
{
anim.setOneShot(false);
anim.setCallback(network);
anim.setVisible(true, true);
anim.start();
}
}
hi you can get solution from here
http://docs.mono-android.net/Android.Graphics.Drawables.AnimationDrawable