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.ListFragment; import android.support.v4.app.LoaderManager.LoaderCallbacks; import android.support.v4.content.Loader; import android.support.v4.widget.CursorAdapter; import android.support.v4.widget.SimpleCursorAdapter; import android.util.Log; import android.view.View; import android.widget.ListView; import android.widget.TextView; import com.company.appname.R; import com.iaraby.db.helper.lib.SimpleCursorLoader; import com.iaraby.monkeycore.MasterNotifier; import com.iaraby.template.data.Beans; import com.iaraby.template.data.Beans.Category; import com.iaraby.template.data.Constants; import com.iaraby.template.data.FavoriteManager; import com.iaraby.template.data.MyDataAdapter; import com.iaraby.template.data.Preferences; import com.iaraby.template.util.FontManager; public class ListFrag extends ListFragment implements LoaderCallbacks<Cursor> { private MasterNotifier notifier; private boolean isFav; private boolean isDual; private boolean isSelectDefault; private int selectedPos; private long selectedId; /* Database variables */ private SimpleCursorAdapter adapter; public static ListFrag createInstance(boolean isDual, boolean isFav) { ListFrag instance = new ListFrag(); Bundle args = new Bundle(); args.putBoolean(Constants.PARAM_IS_FAV, isFav); instance.setArguments(args); return instance; } @Override public void onActivityCreated(Bundle savedInstanceState) { super.onActivityCreated(savedInstanceState); // initial this.selectedId = Constants.EMPTY_INT; this.isSelectDefault = false; this.selectedPos = 0; if (getArguments() != null) this.isFav = getArguments().getBoolean(Constants.PARAM_IS_FAV); if (savedInstanceState != null) { this.selectedPos = savedInstanceState.getInt(Constants.PARAM_CAT_POS_TAG, this.selectedPos); this.selectedId = savedInstanceState.getLong(Constants.PARAM_CAT_ID_TAG, this.selectedId); this.isFav = savedInstanceState.getBoolean(Constants.PARAM_IS_FAV, this.isFav); } int landThreshold = (int) getResources().getDimension(R.dimen.is_land); if (landThreshold > 0) isDual = true; customList(); // Process populateList(); handleMasterStatus(savedInstanceState); } // method: on create private void handleMasterStatus(Bundle savedInstanceState) { if (savedInstanceState != null && this.selectedId != Constants.EMPTY_INT) { // come from sleep or rotate if ((notifier.getCurrentPage() == Constants.LIST_PAGE || notifier.getCurrentPage() == Constants.EMPTY_INT) && !isDual) { notifier.activeList(); } else if (notifier.getCurrentPage() == Constants.DETAILS_PAGE && !isDual) { setSelection(selectedPos); notifier.activeDetails(); } else { // dual page status setSelection(selectedPos); if (notifier.getDetailsFrag() == null) showDetails(selectedPos, selectedId, true); } // back to application latest status } else { // open first time if (isDual) { isSelectDefault = true; } else { notifier.activeList(); } // check if dual page or single page mode } // check instance status } private void populateList() { String[] from = null; if (isFav) { from = new String[] { Beans.Favorite.COL_TITLE }; } else { from = new String[] { Beans.Category.COL_NAME }; } //check if fav or list int[] to = { R.id.list_item_text }; int layoutId = R.layout.list_item; if (Preferences.getInstance(getActivity()).isRTL()) layoutId = R.layout.list_item_right; getLoaderManager().initLoader(1, null, this); adapter = new SimpleCursorAdapter(getActivity(), layoutId, null, from, to, CursorAdapter.FLAG_REGISTER_CONTENT_OBSERVER); adapter.setViewBinder(new Binder()); setListAdapter(adapter); adapter.notifyDataSetChanged(); } public void onListItemClick(ListView l, View v, int position, long id) { this.selectedPos = position; this.selectedId = id; showDetails(position, id, false); } void showDetails(int position, long id, boolean isSelect) { if (isSelect) { selectionListItem(position); } notifier.setDetails(position, id); if (!isDual) notifier.activeDetails(); } private void selectionListItem(int position) { getListView().setSelection(position); getListView().setItemChecked(position, true); } public int countItems() { return getListView().getCount(); } public void refreshList() { if (getLoaderManager().getLoader(1) != null) { if (selectedPos > 0 && selectedPos + 1 == countItems()) --selectedPos; selectedId = Constants.EMPTY_INT; getLoaderManager().getLoader(1).onContentChanged(); } } @Override public void onSaveInstanceState(Bundle outState) { outState.putBoolean(Constants.PARAM_IS_FAV, this.isFav); outState.putInt(Constants.PARAM_CAT_POS_TAG, this.selectedPos); outState.putLong(Constants.PARAM_CAT_ID_TAG, this.selectedId); super.onSaveInstanceState(outState); } @Override public void onAttach(Activity activity) { if (activity != null) notifier = (MasterNotifier) activity; super.onAttach(activity); } /* Cursor loader */ @Override public Loader<Cursor> onCreateLoader(int args0, Bundle bundel) { SimpleCursorLoader loader = new SimpleCursorLoader(getActivity()) { @Override public Cursor loadInBackground() { Cursor cursor = null; if (isFav) { try { cursor = FavoriteManager.getInstance(getActivity()).getFavCursor(); } catch (IllegalAccessError ex) { Log.e(Constants.LOG_TAG, ex.toString()); } } else { cursor = MyDataAdapter.getInstance().getCtegories(); } // check if list or favotite mode if (selectedId == Constants.EMPTY_INT && cursor != null && cursor.moveToPosition(selectedPos)) selectedId = cursor.getLong(cursor.getColumnIndex(Category.COL_ID)); if (isSelectDefault) { showDetails(selectedPos, selectedId, true); isSelectDefault = false; } return cursor; } }; return loader; } @Override public void onLoadFinished(Loader<Cursor> loader, Cursor cursor) { if (adapter != null && cursor != null) adapter.swapCursor(cursor); } @Override public void onLoaderReset(Loader<Cursor> loader) { if (adapter != null) adapter.swapCursor(null); } /* Bind */ class Binder implements SimpleCursorAdapter.ViewBinder { @Override public boolean setViewValue(View view, Cursor cursor, int index) { if (view.getId() == R.id.list_item_text) { TextView text = (TextView) view; FontManager.getInstance(getActivity()).setTextFont(text, FontManager.CONTENT); } return false; } } // class: handle list view bind /* Custom */ private void customList() { getListView().setCacheColorHint(0); getListView().setSelector(R.drawable.listitem_selector); getListView().setChoiceMode(ListView.CHOICE_MODE_SINGLE); getListView().setDivider(null); getListView().setDividerHeight((int) getResources().getDimension(R.dimen.devider_size)); if (isDual) getListView().setBackgroundColor(getResources().getColor(R.color.side_color)); } } // class: list fragment