Java tutorial
/* * Copyright (C) 2012-2016 The Android Money Manager Ex Project Team * * 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.money.manager.ex.investment; import android.content.Intent; import android.database.Cursor; import android.os.Bundle; import android.support.v4.app.LoaderManager; import android.support.v4.content.Loader; import android.support.v4.widget.CursorAdapter; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.AdapterView; import com.money.manager.ex.R; import com.money.manager.ex.common.BaseListFragment; import com.money.manager.ex.common.MmxCursorLoader; import com.money.manager.ex.datalayer.Select; import com.money.manager.ex.datalayer.StockFields; import com.money.manager.ex.datalayer.StockRepository; import com.money.manager.ex.domainmodel.Stock; /** * Use the {@link PortfolioFragment#newInstance} factory method to * create an instance of this fragment. */ public class PortfolioFragment extends BaseListFragment { private static final String ARG_ACCOUNT_ID = "accountId"; public static final int ID_LOADER = 1; /** * Use this factory method to create a new instance of * this fragment using the provided parameters. * * @param accountId Investment account Id * @return A new instance of fragment PortfolioFragment. */ public static PortfolioFragment newInstance(Integer accountId) { PortfolioFragment fragment = new PortfolioFragment(); Bundle args = new Bundle(); args.putInt(ARG_ACCOUNT_ID, accountId); fragment.setArguments(args); return fragment; } public PortfolioFragment() { // Required empty public constructor } private Integer mAccountId; @Override public String getSubTitle() { return getString(R.string.portfolio); } @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); if (savedInstanceState != null && savedInstanceState.containsKey(ARG_ACCOUNT_ID)) { // get data from saved instance state mAccountId = savedInstanceState.getInt(ARG_ACCOUNT_ID); } else { //if (getArguments() != null) { mAccountId = getArguments().getInt(ARG_ACCOUNT_ID); } } @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { if (container == null) return null; View view = inflater.inflate(R.layout.fragment_portfolio, container, false); return view; } @Override public void onActivityCreated(Bundle savedInstanceState) { super.onActivityCreated(savedInstanceState); setEmptyText(getString(R.string.no_stock_data)); setListShown(false); // create adapter PortfolioCursorAdapter adapter = new PortfolioCursorAdapter(getActivity(), null); initializeList(); setListAdapter(adapter); initializeLoader(); // hide the title // todo: uncomment this after setting the correct fragment type. // ActionBar actionBar = getActionBar(); // if (actionBar != null) { // actionBar.setDisplayShowTitleEnabled(false); // } setFloatingActionButtonVisible(true); attachFloatingActionButtonToListView(); } @Override public void onFloatingActionButtonClicked() { openEditInvestmentActivity(null); } @Override public void onSaveInstanceState(Bundle saveInstanceState) { super.onSaveInstanceState(saveInstanceState); saveInstanceState.putInt(ARG_ACCOUNT_ID, mAccountId); } // Private private void initializeList() { // e list item click. getListView().setOnItemClickListener(new AdapterView.OnItemClickListener() { @Override public void onItemClick(AdapterView<?> parent, View view, int position, long id) { // Ignore the header row. if (getListView().getHeaderViewsCount() > 0 && position == 0) return; if (getListAdapter() != null && getListAdapter() instanceof PortfolioCursorAdapter) { Cursor cursor = (Cursor) getListAdapter().getItem(position); Stock stock = Stock.from(cursor); openEditInvestmentActivity(stock.getId()); } } }); } private void initializeLoader() { // initialize loader getLoaderManager().initLoader(ID_LOADER, getArguments(), new LoaderManager.LoaderCallbacks<Cursor>() { @Override public Loader<Cursor> onCreateLoader(int id, Bundle args) { //animation setListShown(false); StockRepository repo = new StockRepository(getActivity()); Select query = new Select(repo.getAllColumns()) .where(StockFields.HELDAT + " = " + args.getInt(ARG_ACCOUNT_ID)) .orderBy(StockFields.SYMBOL); //.orderBy(sort); return new MmxCursorLoader(getActivity(), repo.getUri(), query); } @Override public void onLoadFinished(Loader<Cursor> loader, Cursor data) { CursorAdapter adapter = (CursorAdapter) getListAdapter(); adapter.changeCursor(data); if (isResumed()) { setListShown(true); if (getFloatingActionButton() != null) { getFloatingActionButton().show(true); } } else { setListShownNoAnimation(true); } // update the header // todo displayHeaderData(); } @Override public void onLoaderReset(Loader<Cursor> loader) { ((CursorAdapter) getListAdapter()).changeCursor(null); } }); } private void openEditInvestmentActivity(Integer stockId) { Intent intent = new Intent(getActivity(), InvestmentTransactionEditActivity.class); intent.putExtra(InvestmentTransactionEditActivity.ARG_ACCOUNT_ID, mAccountId); intent.putExtra(InvestmentTransactionEditActivity.ARG_STOCK_ID, stockId); intent.setAction(Intent.ACTION_INSERT); startActivity(intent); } }