Java tutorial
/* This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see <http://www.gnu.org/licenses/>. */ package com.redbooth.projectnevada; import android.animation.Animator; import android.os.Build; import android.os.Bundle; import android.support.v4.app.Fragment; import android.view.LayoutInflater; import android.view.View; import android.view.ViewAnimationUtils; import android.view.ViewGroup; import android.widget.GridView; import com.redbooth.projectnevada.core.Dealer; import com.redbooth.projectnevada.core.DealerFactory; import butterknife.ButterKnife; import butterknife.InjectView; import butterknife.OnItemClick; public class CardGridFragment extends Fragment { private final View.OnLayoutChangeListener onLayoutChangeListener = new View.OnLayoutChangeListener() { @Override public void onLayoutChange(View v, int left, int top, int right, int bottom, int oldLeft, int oldTop, int oldRight, int oldBottom) { if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) { int radius = (int) Math.hypot(right, bottom); Animator reveal = ViewAnimationUtils.createCircularReveal(v, right, bottom, 0, radius); reveal.setDuration(500); reveal.start(); } } }; @InjectView(R.id.list) GridView list; public static CardGridFragment newInstance() { return new CardGridFragment(); } @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View view = inflater.inflate(R.layout.fragment_card_grid, container, false); view.addOnLayoutChangeListener(onLayoutChangeListener); ButterKnife.inject(this, view); return view; } @Override public void onViewCreated(View view, Bundle savedInstanceState) { Dealer dealer = DealerFactory.newInstance(); CardsGridAdapter adapter = new CardsGridAdapter(getActivity(), dealer); list.setAdapter(adapter); } @OnItemClick(R.id.list) @SuppressWarnings("unused") public void onItemClick(int position) { ((MainActivity) getActivity()).selectCard(position); ((MainActivity) getActivity()).showListFragment(); } }