This is the slide of the conference gave at the DroidCon London 2015 by Mathias Seguy. The pitch: Animation is a key point when building your application…. But, “Animation is complicated with Android”, is your feeling. Well, in fact, it’s not. I will show you how simples they are, how magic they could be and how fun your application can become. I will explains which animation to use for which version of the system, what are your choices and what is your strategy. We will have a complete overview on the Android Animation framework. So I hope to see you in the room for this conference, because at the end, your application will be enhanced :)

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

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

3. Demonstration !

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

5. Make Animations simple

6. Because we wantyou to animate your
application !

8. Alpha
Rotate
Translate
Scale
And the plan transformations are yours
V1
<set
android:interpolator="@[package:]anim/interpolator_resource">
<alpha
android:duration="float"
android:fromAlpha="float" android:toAlpha="float" />
<scale
android:duration="float"
android:fromXScale="float" android:toXScale="float"
android:fromYScale="float" android:toYScale="float"
android:pivotX="float" android:pivotY="float" />
<translate
android:duration="float"
android:fromXDelta="float" android:toXDelta="float"
android:fromYDelta="float" android:toYDelta="float" />
<rotate
android:duration="float"
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 pixelsnotthe state of the view

9. 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:duration="1000"
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

10. Uses Handler and Runnable
Simplebut dangerous(memory leak, runs inUI thread, 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

11. Uses Handler and Runnable
Simplebut dangerous(memory leak, runs inUI thread, can generates frames drops)
Not optimized
V11
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);
}
};

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

14. It can be straight
V1
t1t0
v0
v1
from
to
linear

15. 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">
<set android:interpolator=
"@android:anim/decelerate_interpolator">
<set android:interpolator=
"@android:anim/bounce_interpolator"
>

16. 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;
}...}

18. 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

19. ClipDrawable
RotateDrawable
ScaleDrawable
AnimationDrawable
TransitionDrawable
StateListDrawable
AnimatedStateListDrawable
AnimatedVectorDrawable
Handler clipDrawableHandler=new Handler();
Runnable clipDrawableRunnable=new Runnable() {
@Override
public void run() {level++;
clipDrawableHorizontal.setLevel(level);
clipDrawableHandler.postDelayed(clipDrawableRunnable,32);
}
};
<?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

20. RotateDrawable rotateDrawableWheel;
Handler rotateDrawableHandler=new Handler();
Runnable rotateDrawableRunnable=new Runnable() {
public void run() {level++;
rotateDrawableWheel.setLevel(level);
rotateDrawableHandler.postDelayed(rotateDrawableRunnable,32);
}
};
<?xml version="1.0" encoding="utf-8"?>
<rotate xmlns:android="http://schemas.android.com/apk/res/android"
android:drawable="@drawable/ic_android2ee"
android:fromDegrees="0"
android:pivotX="50%"
android:pivotY="50%"
android:toDegrees="360" />
V1
ClipDrawable
RotateDrawable
ScaleDrawable
AnimationDrawable
TransitionDrawable
StateListDrawable
AnimatedStateListDrawable
AnimatedVectorDrawable

21. ScaleDrawable scaleDrawable;
Handler scaleDrawableHandler=new Handler();
Runnable scaleDrawableRunnable=new Runnable() {
public void run() {level++;
scaleDrawable.setLevel(level);
scaleDrawableHandler.postDelayed(scaleeDrawableRunnable,32);
}
};
<?xml version="1.0" encoding="utf-8"?>
<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
AnimatedStateListDrawable
AnimatedVectorDrawable

22. animationDrawable.start();
<animation-list
android:id="@+id/selected" android:oneshot="false">
<item android:drawable="@drawable/attack_magic1" android:duration="100" />
<item android:drawable="@drawable/attack_magic2" android:duration="100" />
<item android:drawable="@drawable/attack_magic3" android:duration="100" />
<item android:drawable="@drawable/attack_magic4" android:duration="100" />
</animation-list>
ClipDrawable
RotateDrawable
ScaleDrawable
AnimationDrawable
TransitionDrawable
StateListDrawable
AnimatedStateListDrawable
AnimatedVectorDrawable
V1

23. transitionDrawable.startTransition(3000);
transitionDrawable.reverseTransition(3000);
<?xml version="1.0" encoding="utf-8"?>
<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
AnimatedStateListDrawable
AnimatedVectorDrawable
V1

24. <?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android"
android:enterFadeDuration="300"
android:exitFadeDuration="300">
<!--Sorry below v21 there is no animated selector
you can just fade in and fade out-->
<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

25. <?xml version="1.0" encoding="utf-8"?>
<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
AnimatedStateListDrawable
AnimatedVectorDrawable

26. <?xml version="1.0" encoding="utf-8"?>
<vector
android:viewportWidth="500"
android:viewportHeight="500"
android:width="500px"
android:height="500px">
<!--Make group to animate them separately using
ObjectAnimator-->
<!--Define the pivot in the group they will be used by
ObjectAnimator-->
<group android:name="tete"
android:pivotX="250.0"
android:pivotY="100.0">
<path
android:name="head"
android:fillColor="#9FBF3B"
android:pathData="..." />
</group>...</vector>
<?xml version="1.0" encoding="utf-8"?>
<animated-vector
android:drawable="@drawable/my_svg" >
<target
android:name="tete"
android:animation="@anim/anim_svg"
/>
</animated-vector>
<?xml version="1.0" encoding="utf-8"?>
<set
xmlns:android="http://schemas.android.com/apk/res/a
ndroid">
<!-- res/anim/rotation.xml -->
<objectAnimator
android:duration="6000"
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:layout_height="wrap_content"
android:layout_weight="1"
android:src="@drawable/my_svg_animated"/>
animatedVectorDrawable.start();
V21
TransitionDrawable
StateListDrawable
AnimatedStateListDrawable
AnimatedVectorDrawable

27. <?xml version="1.0" encoding="utf-8"?>
<vector
android:viewportWidth="500"
android:viewportHeight="500"
android:width="500px"
android:height="500px">
<!--Make group to animate them separately using
ObjectAnimator-->
<!--Define the pivot in the group they will be used by
ObjectAnimator-->
<group android:name="tete"
android:pivotX="250.0"
android:pivotY="100.0">
<path
android:name="head"
android:fillColor="#9FBF3B"
android:pathData="..." />
</group>...</vector>
<?xml version="1.0" encoding="utf-8"?>
<animated-vector
android:drawable="@drawable/my_svg" >
<target
android:name="tete"
android:animation="@anim/animpath_svg"
/>
</animated-vector>
<?xml version="1.0" encoding="utf-8"?>
<set >
<!-- res/anim/rotation.xml -->
<objectAnimator
android:duration="6000"
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:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:src="@drawable/my_svg_animated"/>
animatedVectorDrawable.start();
V21
TransitionDrawable
StateListDrawable
AnimatedStateListDrawable
AnimatedVectorDrawable

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

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

30. To create Svg and/orsimplify them
https://inkscape.org/
To convertSvg 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

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

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

34. Makes animations simple,magic and generic
V13

35. First extends what youwant
(Objector View or what ever)
public class BlueDot extends View {
V13

36. Define the propertyto animate
using set/*MyProperty*/
public class BlueDot extends View {
/** * 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

37. Then animate
public class BlueDot extends View {
/** * 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

38. ClipDrawable
Handler clipDrawableHandler=new Handler();
Runnable clipDrawableRunnable=new Runnable() {
@Override
public void run() {level++;
clipDrawableHorizontal.setLevel(level);
clipDrawableHandler.postDelayed(clipDrawableRunnable,32);
}
};
<?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" />
It was before
Works with every think !
V13

39. 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 more Handler neither Runnable!!!
yes thanks Chet !
V13

41. Demonstration !
v16

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

43. One xmllineto add
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/llSceneRoot"
android:animateLayoutChanges="true"
>
One lineof code to 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

44. v16v8

45. 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();

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

47. Youhave the choicebetween:
Custom animation
Scaling Component
Scaling bitmap
Intent slidingActivity = new Intent(this, SlidingActivity.class);
ActivityCompat.startActivity(this, slidingActivity, translationBundle);}
Bundle translationBundle = ActivityOptionsCompat.makeCustomAnimation(this,
R.anim.anim_push_left_in_a2ee,R.anim.anim_push_left_out_a2ee).toBundle();
Bundle translationBundle =
ActivityOptionsCompat.makeScaleUpAnimation(btnScaling,0,0,btnScaling.getWidth(),
btnScaling.getHeight() ).toBundle();
Bundle translationBundle =
ActivityOptionsCompat.makeThumbnailScaleUpAnimation(imvSmiley,bitmap,0,0)
.toBundle();
v16v8

48. Youhave the choicebetween:
Custom animation
Scaling Component
Scaling bitmap
You needto 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

49. Awesome
First manage your theme
<resources>
<!-- Thanks to :-->
<!-- http://code.tutsplus.com/tutorials/introduction-to-the-new-lollipop-activity-transitions&#45;&#45;cms-23711-->
<!-- Base application theme. -->
<style name="AppTheme" parent="BaseTheme">
<!-- Set the transition between activities effective -->
<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

50. Set the android:transitionName to your components
<ImageButton
android:id="@+id/ibtnSprite"
android:transitionName="@string/imvSprite_transition"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
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_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:src="@drawable/attack_magic_animation"
/>
layout/main_activity layout/other_activity
v21

51. Make yourpairs and launchthe 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

53. 53

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

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

56. 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

57. 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();
}

58. 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

59. 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 }
}

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

61. 61
Le StaggeredLayoutManager
public RecyclerView.LayoutManager getLayoutManager() {
StaggeredGridLayoutManager stagLayoutManager=new StaggeredGridLayoutManager(2,GridLayoutManager.VERTICAL);
stagLayoutManager.setGapStrategy(StaggeredGridLayoutManager.GAP_HANDLING_MOVE_ITEMS_BETWEEN_SPANS);
return stagLayoutManager;
}

62. 62
Le GridLayoutManager
public RecyclerView.LayoutManager getLayoutManager() {
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;
}

63. 63

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

65. 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"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".CoordinatorLayout">
The parent Layout of all yours Layouts: The CoordinatorLayout

66. 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 >

67. 67
<android.support.design.widget.AppBarLayout
... >
<android.support.design.widget.CollapsingToolbarLayout
android:id="@+id/collapsing_toolbar"
android:layout_width="match_parent"
android:layout_height="match_parent"
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>
</android.support.design.widget.AppBarLayout>

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

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

70. 71
<android.support.design.widget.AppBarLayout ... >
<android.support.design.widget.CollapsingToolbarLayout ... >
<ImageView ... />
<android.support.v7.widget.Toolbar ... />
</android.support.design.widget.CollapsingToolbarLayout>
<android.support.design.widget.TabLayout />
</android.support.design.widget.AppBarLayout>
collapsingToolbar.setContentScrimResource(R.drawable.cardview_background_toolbar);

72. 73
V13

73. Demonstration !
V13

74. 75
activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<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

75. 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

76. 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

77. 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

79. How to get the screen size ?
@SuppressLint("NewApi")
private void getViewSize() {
//this is an usual trick when we want to know the dimension of our view
//initialize dimensions of the view
WindowManager wm = (WindowManager) getSystemService(Context.WINDOW_SERVICE);
Display display = wm.getDefaultDisplay();
if (postICS) {
Point size = new Point();
display.getSize(size);
width = size.x;
height = size.y;
} else {
width = display.getWidth(); // deprecated
height = display.getHeight(); // deprecated
}
}
V1

80. Whencustomizing youview, youhave to overwrite the followingmethod:
protected void onSizeChanged(int w, int h, int oldw, int oldh) {
super.onSizeChanged(w, h, oldw, oldh);
this.w = w;
this.h = h;
centerX = w / 2;
centerY = h / 2;
//...}
V1

81. Use the ViewTreeObserver
private void getEditButtonWidth() {
//this is an usual trick when we want to know the dimension of the elements of our view
//find the dimension of the EditButton
ViewTreeObserver vto = btnEdit.getViewTreeObserver();
vto.addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
@Override
public void onGlobalLayout() {
btnEdit.getViewTreeObserver().removeGlobalOnLayoutListener(this);
btnEditWidth = btnEdit.getMeasuredWidth();
}
});
}
V1

82. Use the LayoutParameter of the ViewGroup
private void changeImvSprite1Size(){
//Change the LayoutParameter to change the size of view
if(isImvSprite1Expended){
imvSprite1.setLayoutParams(imvSpritesLayoutParamNormal);
}else{
imvSprite1.setLayoutParams(imvSpritesLayoutParamExpanded);
}
isImvSprite1Expended=!isImvSprite1Expended;
}
private void initializeImvSpriteSize() {
//get the real size of the components
imvSprite1Height = imvSprite1.getMeasuredHeight();
//initialize the layout parameter for the normal size
imvSpritesLayoutParamNormal = new LayoutParams(
ViewGroup.LayoutParams.MATCH_PARENT, imvSprite1Height);
//initialize the layout parameter for the expanded size
imvSpritesLayoutParamExpanded= new LayoutParams(
ViewGroup.LayoutParams.MATCH_PARENT, 2*imvSprite1Height);}
private LinearLayout.LayoutParams imvSpritesLayoutParamNormal, imvSpritesLayoutParamExpanded ;
V1

83. Invalidate and dirtyArea
or layoutRequest
V1

84. Make yourownpaint :
Paint dotPaint= new Paint();
//initialize the shader (stuff that make the color of the paint depending on
// the location in the screen and a set of colors)
//@chiuki at droidcon london
int[] rainbow = getRainbowColors();
Shader shader = new LinearGradient(0, 0, 0, w, rainbow,
null, Shader.TileMode.MIRROR);
Matrix matrix = new Matrix();
matrix.setRotate(90);
shader.setLocalMatrix(matrix);
dotPaint.setShader(shader);
private int[] getRainbowColors() {
return new int[]{
getResources().getColor(R.color.rainbow_red),
getResources().getColor(R.color.rainbow_yellow),
getResources().getColor(R.color.rainbow_green),
getResources().getColor(R.color.rainbow_turquoise),
getResources().getColor(R.color.rainbow_blue),
getResources().getColor(R.color.rainbow_purple)
};}
V1

85. 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

86. #android2ee
mathias.seguy@android2ee.com
www.android2ee.com

87. Code:
https://github.com/MathiasSeguy-Android2EE
Android2EE
@android2ee
Thank you!
MathiasSeguy
Slides:
http://fr.slideshare.net/Android2EE