Java tutorial
/* * The MIT License (MIT) * Copyright 2016 Steve Guidetti * * 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.ultramegasoft.flavordex2.fragment; import android.content.ContentUris; import android.content.Context; import android.database.Cursor; import android.net.Uri; import android.os.Bundle; import android.support.annotation.NonNull; import android.support.annotation.Nullable; import android.support.v4.app.Fragment; import android.support.v4.app.LoaderManager; import android.support.v4.content.CursorLoader; import android.support.v4.content.Loader; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import com.ultramegasoft.flavordex2.R; import com.ultramegasoft.flavordex2.provider.Tables; import com.ultramegasoft.flavordex2.widget.EntryHolder; import com.ultramegasoft.radarchart.RadarEditWidget; import com.ultramegasoft.radarchart.RadarHolder; import com.ultramegasoft.radarchart.RadarView; import java.util.ArrayList; /** * Fragment for adding the flavor radar values for a new journal entry. * * @author Steve Guidetti */ public class AddFlavorsFragment extends Fragment implements LoaderManager.LoaderCallbacks<Cursor> { /** * The Views from the layout */ private RadarView mRadarView; /** * The category ID for the entry being added */ private long mCatId; @Override public void onCreate(@Nullable Bundle savedInstanceState) { super.onCreate(savedInstanceState); final Bundle args = getArguments(); if (args != null) { mCatId = args.getLong(AddEntryFragment.ARG_CAT_ID); } } @Override public void onResume() { super.onResume(); if (!mRadarView.hasData()) { getLoaderManager().initLoader(0, null, this); } else { mRadarView.setVisibility(View.VISIBLE); } } @Nullable @Override @SuppressWarnings("MethodDoesntCallSuperMethod") public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) { final View root = inflater.inflate(R.layout.fragment_add_flavors, container, false); mRadarView = root.findViewById(R.id.radar); ((RadarEditWidget) root.findViewById(R.id.edit_widget)).setTarget(mRadarView); return root; } /** * Load the flavor data into the entry. * * @param entry The entry */ public void getData(@NonNull EntryHolder entry) { if (mRadarView == null || !mRadarView.hasData()) { return; } for (RadarHolder flavor : mRadarView.getData()) { entry.addFlavor(flavor.name, flavor.value); } } @SuppressWarnings("ConstantConditions") @NonNull @Override public Loader<Cursor> onCreateLoader(int id, Bundle args) { final Context context = getContext(); if (context == null) { return null; } final Uri uri = ContentUris.withAppendedId(Tables.Cats.CONTENT_ID_URI_BASE, mCatId); return new CursorLoader(context, Uri.withAppendedPath(uri, "flavor"), null, null, null, Tables.Flavors.POS + " ASC"); } @Override public void onLoadFinished(@NonNull Loader<Cursor> loader, Cursor data) { final ArrayList<RadarHolder> holders = new ArrayList<>(); String name; while (data.moveToNext()) { name = data.getString(data.getColumnIndex(Tables.Flavors.NAME)); holders.add(new RadarHolder(name, 0)); } mRadarView.setData(holders); mRadarView.setInteractive(true); mRadarView.setVisibility(View.VISIBLE); getLoaderManager().destroyLoader(0); } @Override public void onLoaderReset(@NonNull Loader<Cursor> loader) { } }