Java tutorial
/*The MIT License (MIT) Copyright (c) 2014 Ahmad Barqawi (github.com/Barqawiz) Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.*/ package com.iaraby.template.view.fragment; import android.app.Activity; import android.database.Cursor; import android.os.Bundle; import android.support.v4.app.Fragment; import android.support.v4.view.ViewPager; import android.support.v4.view.ViewPager.SimpleOnPageChangeListener; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.TextView; import com.company.appname.R; import com.google.android.gms.ads.AdRequest; import com.google.android.gms.ads.AdView; import com.iaraby.monkeycore.MasterNotifier; import com.iaraby.template.control.DetailsPagerAdapter; import com.iaraby.template.control.DetailsTask; import com.iaraby.template.data.Constants; import com.iaraby.template.data.FavoriteManager; import com.iaraby.template.data.Preferences; import com.iaraby.template.util.FontManager; import com.iaraby.utility.LogManager; import com.iaraby.utility.Utility; public class DetailsFrag extends Fragment { private DetailsPagerAdapter adapter; // received private MasterNotifier notifier; private int catPosition; private long catId; private boolean isFav; // selection private int selectedPosition; // Views private TextView titleView; private ViewPager pager; private AdView adView; public static DetailsFrag createInstance(int position, long id, boolean isFav) { DetailsFrag instance = new DetailsFrag(); Bundle args = new Bundle(); args.putInt(Constants.PARAM_CAT_POS_TAG, position); args.putLong(Constants.PARAM_CAT_ID_TAG, id); args.putBoolean(Constants.PARAM_IS_FAV, isFav); instance.setArguments(args); return instance; } // method: manage instance @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { setHasOptionsMenu(true); View rootView = inflater.inflate(R.layout.fragment_details, container, false); // Initial this.selectedPosition = 0; catPosition = Constants.EMPTY_INT; if (getArguments() != null) { this.catPosition = getArguments().getInt(Constants.PARAM_CAT_POS_TAG, Constants.EMPTY_INT); this.catId = getArguments().getLong(Constants.PARAM_CAT_ID_TAG); this.isFav = getArguments().getBoolean(Constants.PARAM_IS_FAV); if (isFav) this.selectedPosition = this.catPosition; } if (savedInstanceState != null) { this.selectedPosition = savedInstanceState.getInt(Constants.PARAM_SEL_POS_TAG, this.selectedPosition); this.catPosition = savedInstanceState.getInt(Constants.PARAM_CAT_POS_TAG, catPosition); this.catId = savedInstanceState.getLong(Constants.PARAM_CAT_ID_TAG, catId); this.isFav = savedInstanceState.getBoolean(Constants.PARAM_IS_FAV, this.isFav); } // UI pager = (ViewPager) rootView.findViewById(R.id.content_pager); titleView = (TextView) rootView.findViewById(R.id.content_header); adView = (AdView) rootView.findViewById(R.id.ad_container); titleView.setText(""); FontManager.getInstance(getActivity()).setTextFont(titleView, FontManager.CONTENT); // Process if (catPosition != Constants.EMPTY_INT) { DetailsTask process = new DetailsTask(getActivity(), catId, catPosition, this.isFav, new DetailsTask.HandleResult() { @Override public void setResult(String title, String desc) { } @Override public void setResult(String title, Cursor contCur) { fillData(title, contCur); } @Override public void handleError(String error) { LogManager.getIns().e(Constants.LOG_TAG, error); } }); process.execute(); handleAds(adView); } // make sure the data is well received return rootView; } // method: on create private void fillData(String title, Cursor contCur) { if (titleView != null) titleView.setText(title); if (pager != null && contCur != null) { adapter = new DetailsPagerAdapter(contCur, getActivity()); pager.setAdapter(adapter); this.selectedPosition = adapter.getItemPosition(selectedPosition); pager.setCurrentItem(selectedPosition); pager.setOnPageChangeListener(new PageChangeListener()); notifier.updateFavButton(getSelectedId()); if (isFav) { titleView.setText(adapter.getTitle(selectedPosition)); notifier.validateListItems(adapter.getCount()); } if (contCur.getCount() == 1 && titleView != null) { titleView.setCompoundDrawablesWithIntrinsicBounds(0, 0, 0, 0); } } // make sure the pager not null } // method: fill the data private void handleAds(AdView adView) { //if ad info not available do not try to get ads if (Preferences.getInstance(getActivity()).getAdmobBannerId().length() == 0) return; adView.setVisibility(View.VISIBLE); AdRequest adRequest = new AdRequest.Builder().build(); adView.loadAd(adRequest); } /* Override */ @Override public void onSaveInstanceState(Bundle outState) { outState.putInt(Constants.PARAM_SEL_POS_TAG, this.selectedPosition); outState.putInt(Constants.PARAM_CAT_POS_TAG, this.catPosition); outState.putLong(Constants.PARAM_CAT_ID_TAG, this.catId); super.onSaveInstanceState(outState); } @Override public void onAttach(Activity activity) { if (activity != null) notifier = (MasterNotifier) activity; super.onAttach(activity); } // method: on Fragment attached to activity /* Pager Listener */ private class PageChangeListener extends SimpleOnPageChangeListener { public void onPageSelected(int position) { selectedPosition = position; if (adapter != null) { notifier.updateFavButton(getSelectedId()); if (isFav) titleView.setText(adapter.getTitle(position)); } } } public void shareCurrent() { // share current text if (adapter != null) { String data = adapter.getContent(selectedPosition); if (data != null) Utility.share("", data, "", getActivity()); } } public long getSelectedId() { if (adapter != null) return adapter.getId(selectedPosition); else return Constants.EMPTY_INT; } public long handleFavAction() { long selectedId = getSelectedId(); FavoriteManager favManager = FavoriteManager.getInstance(getActivity()); if (favManager.isFav(selectedId)) { // remove from favorite favManager.removeFav(selectedId); Utility.showToastMessage(getActivity(), getString(R.string.action_fav)); // if remove the last item finish the activity if (isFav && FavoriteManager.getInstance(getActivity()).countFav() == 0) { getActivity().finish(); } } else if (selectedId != Constants.EMPTY_INT) { // add to favorite if (favManager.isItemInDatabase(selectedId)) { favManager.addToFav(selectedId); Utility.showToastMessage(getActivity(), getString(R.string.action_not_fav)); } else { Utility.showToastMessage(getActivity(), getString(R.string.cannot_set_fav)); } // check if the item in the database } // check if the item is favorite or not return selectedId; } public void clear() { if (titleView != null) { titleView.setText(""); titleView.setCompoundDrawablesWithIntrinsicBounds(0, 0, 0, 0); } if (adView != null) { adView.setVisibility(View.INVISIBLE); adView.destroy(); } pager.removeAllViews(); } @Override public void onDestroy() { // Destroy the AdView. if (adView != null) { adView.destroy(); } super.onDestroy(); } } // class