The document discusses the differences between ListView and RecyclerView in Android. It covers 5 rounds of topics: 1) Layout, 2) Item Click handling, 3) Animations, 4) Headers/Footers, and 5) Updates. Key differences explained include RecyclerView using an Adapter and ViewHolder pattern, setting click listeners on individual views rather than the entire item, using ValueAnimator for animations, and handling headers/footers differently between the two. Migration tips are provided at the end.

2. Despre mine
• Diaconu Andrei
• Developer din 2007
• Pasionat de tehnologie

3. Android?

4. Cine a folosit
ListView?

7. RecyclerView?

8. Android Lollipop
RecyclerView
CardView
Elevation
Activity Transitions
Ripple
Palette
Tint

10. Runda 1: Layout

11. ListView RecyclerView

12. Adaptor
ListView RecyclerView

13. GridView
RecyclerView
Adaptor

14. ListView RecyclerView

15. RecyclerView
Adaptor
+
ViewHolder
Layout Manager
ListView

17. Runda 2: Item Click

18. ListView RecyclerView
setOnItemClickListener

19. ListView RecyclerView
listview.setOnItemClickListener(
onItemClick(list, view, position, id)
)

20. ListView RecyclerView
Click Listener pe fiecare View

21. ListView RecyclerView
Adaptor{
onBindViewHolder(viewHolder, position) {
viewHolder.card.setOnClickListener(
onClick(view)
);
}
}

22. ListView RecyclerView
Adaptor{
onBindViewHolder(…, final position) {
viewHolder.card.setOnClickListener(
onClick(view)
);
}
}

23. ListView RecyclerView
Daca sterg un view?

24. ListView RecyclerView
Adaptor{
onBindViewHolder(viewHolder, position) {
viewHolder.card.setOnClickListener(
onClick(view){
int pos = recycler.getChildPosition(view);
}
);
}
}

25. ListView RecyclerView
Adaptor cuplat cu recycler

26. Adaptor

27. ListView RecyclerView
Adaptor{
onCreateViewHolder(…) {
viewHolder.card.setOnClickListener(extern);
}
}

29. Runda 3: Animatii

30. ListView RecyclerView
Ce trebuie facut?

31. ListView RecyclerView
ValueAnimator

32. ListView RecyclerView
initialHeight = view.getHeight();
ValueAnimator
.ofFloat(1,0)
.addUpdateListener(
onAnimationUpdate(value) {
view.height = initialHeight * value;
view.requestLayout();
})
.start();

33. ListView RecyclerView
initialHeight = view.getHeight();
ValueAnimator
.ofFloat(1,0)
.addUpdateListener(
onAnimationUpdate(value) {
view.height = initialHeight * value;
view.requestLayout();
})
.start();

34. ListView RecyclerView
initialHeight = view.getHeight();
ValueAnimator
.ofFloat(1,0)
.addUpdateListener(
onAnimationUpdate(value) {
view.height = initialHeight * value;
view.requestLayout();
})
.start();

35. ListView RecyclerView
initialHeight = view.getHeight();
ValueAnimator
.ofFloat(1,0)
.addUpdateListener(
onAnimationUpdate(value) {
view.height = initialHeight * value;
view.requestLayout();
})
.start();

36. ListView RecyclerView
Transient State

37. ListView RecyclerView
Notificam adaptorul

38. ListView RecyclerView
Mutare?
Adaugare?
Animatii multiple?

39. ListView RecyclerView
ItemAnimator

40. ListView RecyclerView
recycler.setItemAnimator(
animateRemove(viewHolder) {
viewHolder.card
.animate()
.scaleY(0)
.start();
return false; }
});

41. ListView RecyclerView
recycler.setItemAnimator(
animateRemove(viewHolder) {
viewHolder.card
.animate()
.scaleY(0)
.start();
return false; }
});

42. ListView RecyclerView
recycler.setItemAnimator(
animateRemove(viewHolder) {
viewHolder.card
.animate()
.scaleY(0)
.start();
return false; }
});

43. ListView RecyclerView
Adaptor mai granulat

44. ListView RecyclerView
Adaugare
Mutare
Animatii multiple

46. Runda 4: Header

47. Header
Footer

48. ListView RecyclerView
list.addHeaderView

49. ListView RecyclerView
Adaptor special
Pentru pozitia 0 returnam header
Pentru alte pozitii decalam cu 1

50. ListView RecyclerView
Adaptor special
Pentru pozitia 0 returnam header
Pentru alte pozitii decalam cu 1

51. ListView RecyclerView
Adaptor special
Pentru pozitia 0 returnam header
Pentru alte pozitii decalam cu 1

52. ListView RecyclerView
if (p == 0)
return header;
else
return adaptor.get(p-1)

54. Runda 5 - Updates

55. ListView RecyclerView
update la telefon

56. ListView RecyclerView
update la sdk

59. Cum migram?

60. Echivalentul ListView
RecyclerView recycler = findViewById();
recycler.setLayoutManager(
new LinearLayoutManager(VERTICAL, false));
recycler.setAdapter(new MyAdapter(data));

61. Echivalentul BaseAdapter
MyAdapter {
onCreateViewHolder(parent, viewType) {
View v = inflate layout;
ViewHolder vh = new ViewHolder(v);
return vh;
}
onBindViewHolder(viewHolder, position) {
DataItem user = data.get(position);
viewHolder.text.setText(user.name);
}
}

62. • ListView itemClick vs click listener clasic

63. • ListView headers vs headere proprii