Animate Android Apps

#AnimateMe
by(Mathias Seguy== Android2EE){
French AndroidTrainer}

If you don't do it for me,
do it for chet !

Animation is life
Animation is comprehension
Animation is engagements
Animationis delightedyour UX
Animation is necessary
Animationis simple

Because we wantyou to animate your
application !

Alpha
Rotate
Translate
Scale
And the plantransformations are yours
V1
<set
android:interpolator="@[package:]anim/interpolator_resource">
<alpha
android:duration="float"
android:fromAlpha="float" android:toAlpha="float" />
<scale
android:fromXScale="float" android:toXScale="float"
android:fromYScale="float" android:toYScale="float"
android:pivotX="float" android:pivotY="float" />
<translate
android:fromXDelta="float" android:toXDelta="float"
android:fromYDelta="float" android:toYDelta="float" />
<rotate
android:fromDegrees="float" android:toDegrees="float"
android:pivotX="float" android:pivotY="float" />
<set>
...
</set>
</set>
Animation animIn= AnimationUtils.loadAnimation(ctx, R.anim.generic_anim);
edtMessage.startAnimation(animIn);
animation/generic_anim.xml
Onlychange pixels notthe state of the view

Makes animations generic
V11
/** * The in Animation for after HC */
AnimatorSet animInHC;
animInHC = (AnimatorSet) AnimatorInflater.loadAnimator(ctx, R.animator.generic_anim);
animInHC.setTarget(edtMessage);
animInHC.setTarget(btnAdd);
animInHC.start();
<set >
<objectAnimator
android:duration="1000"
android:propertyName="translationX"
android:valueFrom="-250"
android:valueTo="0"
android:valueType="floatType" />
<objectAnimator
android:propertyName="scaleX"
android:valueFrom="0.0"
android:valueTo="1.0"
android:valueType="floatType" />
</set>
animator-v11/generic_anim.xml
Changes the state of the object

Uses Handler and Runnable
Simplebut dangerous(memory leak, runsin UIthread, can generates frames drops)
Not optimized
Animationis changingthe view/objectstate by droppingchanges inthe UI thread
Handler clipDrawableHandler=new Handler();
Runnable clipDrawableRunnable=new Runnable() {
@Override
public void run() {
myView.changeSomething(level);
clipDrawableHandler.postDelayed(clipDrawableRunnable,32);
}
};
V1

Uses Handler and Runnable
Simplebut dangerous(memory leak, runsin UIthread, can generates frames drops)
Not optimized
V11
Animationis changingthe view/objectstate by droppingchanges inthe UI thread
@Override
public void run() {
myView.changeSomething(level);
}
};

Don't be scared, it's simple.
How doyougofrom the pointfromto the pointto?
V1
t1t0
v0
v1
from
to
?
i(t)=v,
where i(t0)=v0
and i(t1)=v1
float
time

It can be straight
V1
t1t0
v0
v1
from
to
linear

t1t0
v0
v1
Youcan use the system's ones
V1
t1t0
v0
v1
from
to
deceleration acceleration
to
from
t1t0
v0
v1
to
bouncing
from
<set android:interpolator=
"@android:anim/accelerate_interpolator">
"@android:anim/decelerate_interpolator">
"@android:anim/bounce_interpolator"
>

Or buildyour own.
V1
t1t0
v0
v1
from
to
alcoholic
public class MyInterpolator implements Interpolator {
float v;
@Override
public float getInterpolation(float input) {
//v=i(input)
return v;
}...}

myDrawable= (ImageView)findViewById(R.id.imvToto).getDrawable();
<ImageView
android:id="@+id/imvToto"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:src="@drawable/my_drawable"/>
V1

ClipDrawable
RotateDrawable
ScaleDrawable
AnimationDrawable
TransitionDrawable
StateListDrawable
AnimatedStateListDrawable
AnimatedVectorDrawable
@Override
public void run() {level++;
clipDrawableHorizontal.setLevel(level);
}
};
<?xml version="1.0" encoding="utf-8"?>
<clip xmlns:android="http://schemas.android.com/apk/res/android"
android:drawable="@drawable/ic_android2ee"
android:clipOrientation="horizontal"
android:gravity="left" />
V1

RotateDrawable rotateDrawableWheel;
Handler rotateDrawableHandler=new Handler();
Runnable rotateDrawableRunnable=new Runnable() {
rotateDrawableWheel.setLevel(level);
rotateDrawableHandler.postDelayed(rotateDrawableRunnable,32);
}
};
<rotate xmlns:android="http://schemas.android.com/apk/res/android"
android:fromDegrees="0"
android:pivotX="50%"
android:pivotY="50%"
android:toDegrees="360" />
V1
ClipDrawable
RotateDrawable
ScaleDrawable
AnimationDrawable
TransitionDrawable
StateListDrawable

ScaleDrawable scaleDrawable;
Handler scaleDrawableHandler=new Handler();
Runnable scaleDrawableRunnable=new Runnable() {
scaleDrawable.setLevel(level);
scaleDrawableHandler.postDelayed(scaleeDrawableRunnable,32);
}
};
<scale
xmlns:android="http://schemas.android.com/apk/res/android"
android:drawable="@mipmap/ic_edit"
android:scaleGravity="center"
android:scaleHeight="100%"
android:scaleWidth="100%" />
V1
ClipDrawable
RotateDrawable
ScaleDrawable
AnimationDrawable
TransitionDrawable
StateListDrawable

animationDrawable.start();
<animation-list
android:id="@+id/selected" android:oneshot="false">
<item android:drawable="@drawable/attack_magic1" android:duration="100" />
</animation-list>
ClipDrawable
RotateDrawable
ScaleDrawable
AnimationDrawable
TransitionDrawable
StateListDrawable
V1

transitionDrawable.startTransition(3000);
transitionDrawable.reverseTransition(3000);
<transition xmlns:android="http://schemas.android.com/apk/res/android">
<item android:drawable="@mipmap/ic_ok" />
<item android:drawable="@mipmap/ic_nok" />
</transition>
ClipDrawable
RotateDrawable
ScaleDrawable
AnimationDrawable
TransitionDrawable
StateListDrawable
V1

<selector xmlns:android="http://schemas.android.com/apk/res/android"
android:enterFadeDuration="300"
android:exitFadeDuration="300">

<item android:id="@+id/item_pressed"
android:state_pressed="true">
<bitmap android:src="@drawable/ic_android2ee"/></item>
<item android:id="@+id/item_normal">
<bitmap android:src="@drawable/ic_nut"/> </item>
</selector>
fade fade
Norma
l
Press
ed
Norma
l
View
state
Displ
ay
V
1
ClipDrawable
RotateDrawable
ScaleDrawable
AnimationDrawable
TransitionDrawable
StateListDrawable
AnimatedStateListDraw
able
AnimatedVectorDrawabl
e

<animated-selector >
<item android:id="@+id/item_pressed"
android:state_pressed="true">
<bitmap android:src="@drawable/ic_android2ee"/></item>
<item android:id="@+id/item_normal">
<bitmap android:src="@drawable/ic_nut"/> </item>
<transition android:fromId="@+id/item_pressed"
android:toId="@+id/item_normal">
<animation-list android:id="@+id/selected"
android:oneshot="true">
<item android:drawable="@drawable/attack_magic1"
android:duration="100" />
<item android:drawable="@drawable/attack_magic2"
android:duration="100" />
</animation-list></transition></animated-selector>
V21
Normal Pressed NormalView state
Display
ClipDrawable
RotateDrawable
ScaleDrawable
AnimationDrawable
TransitionDrawable
StateListDrawable

<vector
android:viewportWidth="500"
android:viewportHeight="500"
android:width="500px"
android:height="500px">


<group android:name="tete"
android:pivotX="250.0"
android:pivotY="100.0">
<path
android:name="head"
android:fillColor="#9FBF3B"
android:pathData="..." />
</group>...</vector>
<animated-vector
android:drawable="@drawable/my_svg" >
<target
android:name="tete"
android:animation="@anim/anim_svg"
/>
</animated-vector>
<set
xmlns:android="http://schemas.android.com/apk/res/a
ndroid">

<objectAnimator
android:propertyName="rotation"
android:valueFrom="0"
android:valueTo="360" />
</set>
drawable/my_svg drawable/my_svg_animated anim/anim_svg
use
us
e
layout/my_view
use
<ImageView
android:id="@+id/imvAnimatedVector"
android:layout_width="wrap_content"
android:src="@drawable/my_svg_animated"/>
animatedVectorDrawable.start();
V21
TransitionDrawable
StateListDrawable

<vector
android:viewportWidth="500"
android:viewportHeight="500"
android:width="500px"
android:height="500px">


<group android:name="tete"
android:pivotX="250.0"
android:pivotY="100.0">
<path
android:name="head"
android:fillColor="#9FBF3B"
android:pathData="..." />
</group>...</vector>
<animated-vector
android:drawable="@drawable/my_svg" >
<target
android:name="tete"
android:animation="@anim/animpath_svg"
/>
</animated-vector>
<set >

<objectAnimator
android:propertyName="pathData"
android:valueFrom="M300,70 l 0,-70 70,70 0,0 -
70,70z"
android:valueTo="M300,70 l 0,-70 70,0 0,140 -
70,0 z"
android:valueType="pathType"/>
</set>
drawable/my_svg drawable/my_svg_animated anim/animpath_svg
use
us
e
layout/my_view
use
<ImageView
android:id="@+id/imvAnimatedVector2"
android:src="@drawable/my_svg_animated"/>
animatedVectorDrawable.start();
V21
TransitionDrawable
StateListDrawable

The constraints that killfor path transformation:
"Note thatthe paths must be compatiblefor morphing.In more details, the pathsshouldhave
exact same lengthof commands , and exact same lengthof parameters for each commands."
It means: youwon't use it expectfor so simple trick (arrow to hamburger).
=>Waiting for tools !
V21

And here it is !!!
https://github.com/bonnyfone/vectalign
V21

To create Svg and/orsimplify them
https://inkscape.org/
To convert Svg intoVectorDrawable
http://inloop.github.io/svg2android/
A goodpractice :
Define your path in aString file
(resvaluesmy_path_string.xml)
V21
But even with that it's the hell on earth
=>working ona Github project

Make it simple and magic:
Youcan animate any view
translationX ,translationY, rotationX, rotationY, rotation, scaleX, scaleY, pivotX,pivotY,
x,y,alphaand more
with one lineof code!
myView.animate().setDuration(300).x(20).rotationY(60).start();
V13

myView.animate().rotation(360);
is equivalent to
ObjectAnimator.ofFloat(myView, "rotation", 0f, 360f).start();
V13

Makes animations simple,magic and generic
V13

First extends what youwant
(Object or View or what ever)
public class BlueDot extends View {
V13

Define the propertyto animate
usingset/*MyProperty*/
/** * The property to animate *
* @param parameter value of the state to calculate the animation of the object */
private void setToto(int parameter) {
/*Do your stuff,
(call invalidate to redraw view)*/
V13

Then animate
/** * The property to animate *
@param parameter value of the state to calculate the animation of the object */
private void setToto(int parameter) {/*Do your stuff,(call invalidate to redraw view)*/
ObjectAnimator.ofInt(blueDot, "toto", 0, 110)
.start();
V13

ClipDrawable
@Override
clipDrawableHorizontal.setLevel(level);
}
};
<clip xmlns:android="http://schemas.android.com/apk/res/android"
android:clipOrientation="horizontal"
android:gravity="left" />
It was before
Works with every think !
V13

Works with every think !
public class MyActivity extends Activity{
private void setMoveDrawable(int level){
clipDrawableHorizontal.setLevel(level); }
private void animateDrawable() {
ObjectAnimator.ofInt(this, "MoveDrawable", 0, 10000).start();
}
No moreHandler neither Runnable!!!
yes thanks Chet !
V13

One xmllineto add
<LinearLayout
android:layout_height="match_parent"
android:id="@+id/llSceneRoot"
android:animateLayoutChanges="true"
>
v16

One xmllineto add
<LinearLayout
android:id="@+id/llSceneRoot"
android:animateLayoutChanges="true"
>
One lineof codeto add
if(postICS){
LayoutTransition transition = ((ViewGroup)findViewById(R.id.llSceneRoot)).getLayoutTransition();
// New capability as of Jellybean; monitor the container for *all* layout changes
// (not just add/remove/visibility changes) and animate these changes as well.(==size)
transition.enableTransitionType(LayoutTransition.CHANGING);
}
v16

Youhave the choicebetween
Custom animation
Intent slidingActivity = new Intent(this, SlidingActivity.class);
ActivityCompat.startActivity(this, slidingActivity, translationBundle);}
v16v8
Bundle translationBundle = ActivityOptionsCompat.makeCustomAnimation(this,
R.anim.anim_push_left_in_a2ee,R.anim.anim_push_left_out_a2ee).toBundle();

Youhave the choicebetween
Custom animation
Scaling Component
v16v8
Bundle translationBundle =
ActivityOptionsCompat.makeScaleUpAnimation(btnScaling,0,0,btnScaling.getWidth(),
btnScaling.getHeight() ).toBundle();

Youhave the choicebetween:
Custom animation
ScalingComponent
Scaling bitmap
ActivityOptionsCompat.makeScaleUpAnimation(btnScaling,0,0,btnScaling.getWidth(),
btnScaling.getHeight() ).toBundle();
ActivityOptionsCompat.makeThumbnailScaleUpAnimation(imvSmiley,bitmap,0,0)
.toBundle();
v16v8

Youhave the choicebetween:
Custom animation
ScalingComponent
Scaling bitmap
You need to reverse :
public class otherActivity extends Activity {
public void finish() {
super.finish();
//this work for all version superior to level 5
overridePendingTransition(R.anim.anim_push_right_in_a2ee,
R.anim.anim_push_right_out_a2ee);
}}
v16v8

Awesome
First manage your theme
<resources>



<style name="AppTheme" parent="BaseTheme">

<item name="android:windowContentTransitions">true</item>
<item name="android:windowEnterTransition">@android:transition/slide_bottom</item>
<item name="android:windowExitTransition">@android:transition/slide_bottom</item>
<item name="android:windowAllowEnterTransitionOverlap">true</item>
<item name="android:windowAllowReturnTransitionOverlap">true</item>
<item name="android:windowSharedElementEnterTransition">@android:transition/move</item>
<item name="android:windowSharedElementExitTransition">@android:transition/move</item>
</style>
</resources>
v21

Set the android:transitionName to your components
<ImageButton
android:id="@+id/ibtnSprite"
android:transitionName="@string/imvSprite_transition"
android:layout_alignParentRight="true"
android:layout_alignParentTop="true"
android:layout_gravity="center"
android:src="@drawable/attack_magic_animation"
/>
<ImageView
android:id="@+id/imvSprite"
android:transitionName="@string/imvSprite_transition"
android:layout_gravity="center"
android:src="@drawable/attack_magic_animation"
/>
layout/main_activity layout/other_activity
v21

Make your pairs and launch the new Activity
if (isPostLollipop) {
ActivityOptionsCompat options = ActivityOptionsCompat.makeSceneTransitionAnimation(
this,
new Pair<View, String>(imvSprites, getString(R.string.imvSprite_transition)),
);
}
ActivityCompat.startActivity(MainActivity.this, intent, options.toBundle());
}
v21

54
dependencies {
...
compile 'com.android.support:recyclerview-v7:23.0.1'

<android.support.v7.widget.RecyclerView
android:id="@+id/my_recycler_view"
android:scrollbars="vertical"
app:layout_behavior="@string/appbar_scrolling_view_behavior"
/>
V7

55
RecyclerView
Adapter
ViewHolder
LayoutManager
ItemAnimator ItemDecorator
ItemView management
(ClickListener,Animation...)
dataSet
V7

56
Its the natural evolution of the ListView, the ViewHolder is the one responsible of the view management
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View myView=inflater.inflate(R.layout.recyclerview,container,false);
recyclerView= (RecyclerView) myView.findViewById(R.id.my_recycler_view);
// use a layout manager
recyclerViewLayoutManager = getLayoutManager();
recyclerView.setLayoutManager(recyclerViewLayoutManager);
// specify an adapter (see also next example)
recyclerViewAdapter = new RecyclerViewAdapter(humans,getActivity());
recyclerView.setAdapter(recyclerViewAdapter);
return myView ;
}
find the View
set the LayoutManager
set the Adapter
V7

57
This is the same code as for the ListView (ViewHolder next slide)
public class RecyclerViewAdapter extends
RecyclerView.Adapter<RecyclerViewAdapter.ViewHolder>{
/****Attributes (t for temp)**/
private ArrayList<Human> humans;
private LayoutInflater inflater;
private View tNewView;
private ViewHolder tViewHolder;
private Human tHuman;
/****** Constructor**/
public RecyclerViewAdapter(ArrayList<Human>
dataSet,Context ctx){
humans=dataSet;
inflater=LayoutInflater.from(ctx);
}
@Override
public RecyclerViewAdapter.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
tNewView=inflater.inflate(R.layout.simple_item,parent,false);
tViewHolder=new ViewHolder(tNewView);
return tViewHolder;
}
@Override
public void onBindViewHolder(RecyclerViewAdapter.ViewHolder holder, int position) {
tHuman=humans.get(position);
holder.getTxvName().setText(tHuman.getName());
holder.getTxvFirstName().setText(tHuman.getFirstName());
holder.getTxvMessage().setText(tHuman.getMessage());
}
@Override
public int getItemCount() {
return humans.size();
}
V7

58
This is the same code as for the ListView (ViewHolder next slide)
public class RecyclerViewAdapter extends
RecyclerView.Adapter<RecyclerViewAdapter.ViewHolder>{
/****Attributes (t for temp)**/
private ArrayList<Human> humans;
private LayoutInflater inflater;
private View tNewView;
private ViewHolder tViewHolder;
private Human tHuman;
/****** Constructor**/
public RecyclerViewAdapter(ArrayList<Human>
dataSet,Context ctx){
humans=dataSet;
inflater=LayoutInflater.from(ctx);
}
@Override
public RecyclerViewAdapter.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
tNewView=inflater.inflate(R.layout.simple_item,parent,false);
tViewHolder=new ViewHolder(tNewView);
return tViewHolder;
}
@Override
public void onBindViewHolder(RecyclerViewAdapter.ViewHolder holder, int position) {
tHuman=humans.get(position);
holder.getTxvName().setText(tHuman.getName());
holder.getTxvFirstName().setText(tHuman.getFirstName());
holder.getTxvMessage().setText(tHuman.getMessage());
}
@Override
public int getItemCount() {
return humans.size();
}
Inflate the view and its viewHolder
Return the ViewHolder
Update the View using the ViewHolder
Set your DataSet and your LayoutInflater
V7

59
Le ViewHolder gère la vue qu'il encapsule
public class ViewHolder extends RecyclerView.ViewHolder{
TextView txvName=null;
TextView txvFirstName=null;
TextView txvMessage=null;
View.OnClickListener clickListener;
int position;
public ViewHolder(View itemView) {
super(itemView);
txvName= (TextView) itemView.findViewById(R.id.txvName);
txvFirstName= (TextView) itemView.findViewById(R.id.txvFirstName);
txvMessage= (TextView) itemView.findViewById(R.id.txvMessage);
clickListener=new View.OnClickListener() {
public void onClick(View v) {changeTxvMessageVisibilityState(); }
};
itemView.setOnClickListener(clickListener);
}
public TextView getTxvFirstName() {return txvFirstName;}
public TextView getTxvMessage() {return txvMessage;}
public TextView getTxvName() {return txvName;}
public void changeTxvMessageVisibilityState(){
//Do the stuff }
}
V7

60
Le LinearLayoutManager
public RecyclerView.LayoutManager getLayoutManager() {
return new LinearLayoutManager(getContext());
}
V7

61
Le StaggeredLayoutManager
StaggeredGridLayoutManager stagLayoutManager=new StaggeredGridLayoutManager(2,GridLayoutManager.VERTICAL);
stagLayoutManager.setGapStrategy(StaggeredGridLayoutManager.GAP_HANDLING_MOVE_ITEMS_BETWEEN_SPANS);
return stagLayoutManager;
}
V7

62
Le GridLayoutManager
GridLayoutManager gridLayoutManager=new GridLayoutManager(getContext(),2,GridLayoutManager.VERTICAL,false);
//define specific span of specific cells according to a rule
gridLayoutManager.setSpanSizeLookup(new GridLayoutManager.SpanSizeLookup() {
@Override
public int getSpanSize(int arg0) {
return (arg0 % 3) == 0 ? 2 : 1;
}
});
return gridLayoutManager;
}
V7

64
dependencies {
...
compile 'com.android.support:design:23.0.1'
V7

65
<android.support.design.widget.CoordinatorLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
xmlns:app="http://schemas.android.com/apk/res-auto"
tools:context=".CoordinatorLayout">
The parent Layout of all yours Layouts: The CoordinatorLayout
V7

V7
66
<android.support.design.widget.CoordinatorLayout >
<android.support.design.widget.AppBarLayout
...
android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar">
<android.support.v7.widget.Toolbar
...
app:layout_scrollFlags="scroll|enterAlways"/>
<android.support.design.widget.TabLayout
...
android:fillViewport="true"/>
</android.support.design.widget.AppBarLayout>
<android.support.v4.view.ViewPager //Your content
...
app:layout_behavior="@string/appbar_scrolling_view_behavior" />
</android.support.design.widget.CoordinatorLayout >

V7
67
<android.support.design.widget.AppBarLayout
... >
<android.support.design.widget.CollapsingToolbarLayout
android:id="@+id/collapsing_toolbar"
app:layout_scrollFlags="scroll|exitUntilCollapsed"
android:fitsSystemWindows="true"
app:contentScrim="?attr/colorPrimary"
app:expandedTitleMarginStart="48dp"
app:expandedTitleMarginEnd="64dp">
<ImageView
...
android:fitsSystemWindows="true"
app:layout_collapseMode="parallax" />
<android.support.v7.widget.Toolbar
...
app:layout_scrollFlags="scroll|enterAlways"/>
<android.support.design.widget.TabLayout
...
android:fillViewport="true"/>
</android.support.design.widget.CollapsingToolbarLayout>

V7
68
<android.support.design.widget.AppBarLayout...>
<android.support.design.widget.CollapsingToolbarLayout...>
<ImageView.../>
<android.support.design.widget.TabLayout .../>
<android.support.v7.widget.Toolbar.../>
Set the title of the ActionBar on
the CollapsingToolbarLayout not
on the ToolBar!

V7
69
<android.support.design.widget.AppBarLayout...>
<android.support.design.widget.CollapsingToolbarLayout...>
<ImageView.../>
<android.support.v7.widget.Toolbar.../>
<android.support.design.widget.TabLayout .../>
s
w
it
c
h

V7
71
<android.support.design.widget.AppBarLayout ... >
<android.support.design.widget.CollapsingToolbarLayout ... >
<ImageView ... />
<android.support.v7.widget.Toolbar ... />
<android.support.design.widget.TabLayout />
collapsingToolbar.setContentScrimResource(R.drawable.cardview_background_toolbar);

75
activity_main.xml
<android.support.v4.view.ViewPager
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:id="@+id/viewpager"
android:background="#FF00F0F0">
</android.support.v4.view.ViewPager>
public class MainActivity extends ActionBarActivity {
private MyPagerAdapter pagerAdapter;
private ViewPager viewPager;
@Override
protected void onCreate(Bundle savedInstanceState) {
...
//instanciate the PageAdapter
pagerAdapter=new MyPagerAdapter(this);
//Find the viewPager
viewPager = (ViewPager) super.findViewById(R.id.viewpager);
// Affectation de l'adapter au ViewPager
viewPager.setAdapter(pagerAdapter);
}
V13

76
public class MyPagerAdapter extends FragmentPagerAdapter {
private final ArrayList<Fragment> fragments;
public MyPagerAdapter(ActionBarActivity ctx) {
super(ctx.getSupportFragmentManager());
fragments = new ArrayList<Fragment>();
//A stuff I never did before, instanciate my fragment
Fragment frag =new MyFragment1();
fragments.add(frag);...
}
public Fragment getItem(int position) { return fragments.get(position); }
public int getCount() {return fragments.size(); }
V13

77
public class MainActivity extends ActionBarActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
...
//instanciate the PageAdapter
pagerAdapter=new MyPagerAdapter(this);
//Find the viewPager
viewPager = (ViewPager) super.findViewById(R.id.viewpager);
// Affectation de l'adapter au ViewPager
viewPager.setAdapter(pagerAdapter);
if(Build.VERSION.SDK_INT>=Build.VERSION_CODES.HONEYCOMB){
viewPager.setPageTransformer(true, new PageTransformer(this));
}
V13

78
public class MyPageTransformer implements ViewPager.PageTransformer{
RecyclerView myRecyclerView;
public void transformPage(View view, float position) {
//Only the main layout is passed here/
myRecyclerView= (RecyclerView) view.findViewById(R.id.my_recycler_view);
if (position < -1) { // [-Infinity,-1)This page is way off-screen to the left.
view.setAlpha(0); }
else if (position < 1) { //in the visible range [-1,1]
myRecyclerView.setAlpha(1-Math.abs(position));
view.setAlpha(1);
if (position < 0) {//coming from left
myRecyclerView.setRotationX((position * 360));
} else {//coming from right
myRecyclerView.setRotationX(-1*position *360);
}
}
else { // (1,+Infinity] // This page is way off-screen to the right.
view.setAlpha(0); }
}}
V13

First: Simplifyyour layout !!!
if not enoughyoucan also:
User LayerType Hardware accelerated
btnDoNotPress.setLayerType(View.LAYER_TYPE_HARDWARE,null);
new Animator.AnimatorListener() {
public void onAnimationEnd(Animator animation) {
btnDoNotPress.setLayerType(View.LAYER_TYPE_NONE, null);
}
V1

Use Interface andFactory
/** * The animation */
MainActivityAnimMother anim;
//the factory for the animations (you can
create a Class to do that if you want) :
if(isPostLollipop){
anim=new MainActivityAnimLLP();
}else if(postICS){
anim=new MainActivityAnimICS();
}else{
anim=new MainActivityAnimGinger();
}
V1
MainActivity
MainActivity
MainActivityAnimGinger
MainActivityAnimICS
MainActivityAnimLLP
MainActivity
MotherAnim
MainActivityAnimIntf
Animation code Animation
attributes
Animation methods
declaration
v21

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Animate Android Apps

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