Java tutorial
package com.dm.wallpaper.board.fragments; import android.content.res.Configuration; import android.os.Build; import android.os.Bundle; import android.support.annotation.Nullable; import android.support.v4.app.Fragment; import android.support.v4.view.ViewCompat; import android.support.v7.widget.DefaultItemAnimator; import android.support.v7.widget.RecyclerView; import android.support.v7.widget.StaggeredGridLayoutManager; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import com.danimahardhika.android.helpers.core.ViewHelper; import com.danimahardhika.android.helpers.core.WindowHelper; import com.dm.wallpaper.board.R; import com.dm.wallpaper.board.R2; import com.dm.wallpaper.board.adapters.AboutAdapter; import com.dm.wallpaper.board.preferences.Preferences; import butterknife.BindView; import butterknife.ButterKnife; /* * Wallpaper Board * * Copyright (c) 2017 Dani Mahardhika * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ public class AboutFragment extends Fragment { @BindView(R2.id.recyclerview) RecyclerView mRecyclerView; @Nullable @Override public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) { View view = inflater.inflate(R.layout.fragment_about, container, false); ButterKnife.bind(this, view); if (!Preferences.get(getActivity()).isShadowEnabled()) { View shadow = ButterKnife.findById(view, R.id.shadow); if (shadow != null) shadow.setVisibility(View.GONE); } return view; } @Override public void onActivityCreated(@Nullable Bundle savedInstanceState) { super.onActivityCreated(savedInstanceState); ViewCompat.setNestedScrollingEnabled(mRecyclerView, false); resetRecyclerViewPadding(getActivity().getResources().getConfiguration().orientation); mRecyclerView.setItemAnimator(new DefaultItemAnimator()); int spanCount = getActivity().getResources().getInteger(R.integer.about_column_count); mRecyclerView .setLayoutManager(new StaggeredGridLayoutManager(spanCount, StaggeredGridLayoutManager.VERTICAL)); mRecyclerView.setAdapter(new AboutAdapter(getActivity(), spanCount)); } @Override public void onConfigurationChanged(Configuration newConfig) { super.onConfigurationChanged(newConfig); resetRecyclerViewPadding(newConfig.orientation); ViewHelper.resetSpanCount(mRecyclerView, getActivity().getResources().getInteger(R.integer.about_column_count)); StaggeredGridLayoutManager manager = (StaggeredGridLayoutManager) mRecyclerView.getLayoutManager(); mRecyclerView.setAdapter(new AboutAdapter(getActivity(), manager.getSpanCount())); } private void resetRecyclerViewPadding(int orientation) { if (mRecyclerView == null) return; int padding = 0; int navBar = 0; if (orientation == Configuration.ORIENTATION_LANDSCAPE) { padding = getActivity().getResources().getDimensionPixelSize(R.dimen.content_padding); navBar = padding; } if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) { boolean tabletMode = getActivity().getResources().getBoolean(R.bool.android_helpers_tablet_mode); if (tabletMode || orientation == Configuration.ORIENTATION_PORTRAIT) { navBar = WindowHelper.getNavigationBarHeight(getActivity()); } navBar += WindowHelper.getStatusBarHeight(getContext()); } navBar += ViewHelper.getToolbarHeight(getActivity()); mRecyclerView.setPadding(padding, padding, 0, navBar); } }