ListView vs RecyclerView

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

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Android?

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Cine a folosit ListView?

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RecyclerView?

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RecyclerView CardView Elevation Activity Transitions Ripple Palette Tint Android Lollipop

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Runda 1: Layout

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ListView RecyclerView

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Adaptor RecyclerView ListView

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GridView Adaptor RecyclerView

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ListView RecyclerView

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RecyclerView Adaptor + ViewHolder Layout Manager ListView

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No content

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Runda 2: Item Click

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setOnItemClickListener RecyclerView ListView

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

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Click Listener pe fiecare View RecyclerView ListView

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

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

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Daca sterg un view? RecyclerView ListView

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

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Adaptor cuplat cu recycler RecyclerView ListView

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Adaptor

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

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No content

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Runda 3: Animatii

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Ce trebuie facut? RecyclerView ListView

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ValueAnimator RecyclerView ListView

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

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Transient State RecyclerView ListView

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Notificam adaptorul RecyclerView ListView

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Mutare? Adaugare? Animatii multiple? RecyclerView ListView

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RecyclerView ListView ItemAnimator

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

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

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

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RecyclerView ListView Adaptor mai granulat

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RecyclerView ListView Adaugare Mutare Animatii multiple

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Runda 4: Header

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Header Footer

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list.addHeaderView RecyclerView ListView

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

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

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

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

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No content

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Runda 5 - Updates

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update la telefon RecyclerView ListView

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update la sdk RecyclerView ListView

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Cum migram?

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

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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); } }