Java tutorial
/* * * Copyright 2013-2015 Yohann Bianchi * * 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 2 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, write to the Free Software Foundation, Inc., * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA * or see <http://www.gnu.org/licenses/>. * */ package com.zion.htf.ui.fragment; import android.content.Intent; import android.database.Cursor; import android.os.Bundle; import android.support.v4.app.Fragment; import android.support.v4.app.LoaderManager; import android.support.v4.content.Loader; import android.util.Log; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.AdapterView; import com.zion.content.SQLiteCursorLoader; import com.zion.htf.Application; import com.zion.htf.R; import com.zion.htf.adapter.LineUpListAdapter; import com.zion.htf.data.MusicSet; import com.zion.htf.exception.MissingArgumentException; import com.zion.htf.ui.ArtistDetailsActivity; import java.util.Locale; import se.emilsjolander.stickylistheaders.StickyListHeadersListView; public class LineUpListFragment extends Fragment implements AdapterView.OnItemClickListener, LoaderManager.LoaderCallbacks<Cursor> { private static final String TAG = "LineUpListFragment"; public static final String ARG_STAGE_NAME = "com.zion.htf.arg.stage_name"; private static int autoIncrement = 0; //FIXME: Find a better way than this hack (possible solution with Fragment#getId()) protected String stage; private StickyListHeadersListView listView; private LineUpListAdapter adapter; @Override public void onCreate(Bundle savedInstance) { try { int fragmentId = LineUpListFragment.autoIncrement++; super.onCreate(savedInstance); this.stage = this.getArguments().getString(LineUpListFragment.ARG_STAGE_NAME); if (null == this.stage) throw new MissingArgumentException(LineUpListFragment.ARG_STAGE_NAME, "String"); this.adapter = new LineUpListAdapter(this.getActivity(), null, false); this.getActivity().getSupportLoaderManager().initLoader(fragmentId, null, this).forceLoad(); } catch (MissingArgumentException e) { throw new RuntimeException(e); } } @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View view = inflater.inflate(R.layout.fragment_line_up_list, container, false); this.listView = (StickyListHeadersListView) view.findViewById(R.id.line_up_list); this.listView.setAdapter(this.adapter); this.listView.setOnItemClickListener(this); view.setTag(this.stage); return view; } @Override public void onSaveInstanceState(Bundle outState) { outState.putString(LineUpListFragment.ARG_STAGE_NAME, this.stage); } @Override public void onItemClick(AdapterView<?> parent, View view, int position, long id) { Cursor cursor = (Cursor) this.listView.getAdapter().getItem(position); Intent intent = new Intent(this.getActivity(), ArtistDetailsActivity.class); intent.putExtra(ArtistDetailsActivity.EXTRA_SET_ID, cursor.getInt(MusicSet.COLUMN_ID)); this.getActivity().startActivity(intent); this.getActivity().overridePendingTransition(R.anim.slide_in_right, R.anim.slide_out_left); } public static LineUpListFragment newInstance(String stageName) { Bundle args = new Bundle(1); args.putString(LineUpListFragment.ARG_STAGE_NAME, stageName); LineUpListFragment fragment = new LineUpListFragment(); fragment.setArguments(args); return fragment; } /* * Handle CursorLoader */ @Override public Loader<Cursor> onCreateLoader(int i, Bundle bundle) { Log.v("LineUpListFragment", String.format(Locale.ENGLISH, "Begin loading sets for stage %s", this.stage)); return new SQLiteCursorLoader(this.getActivity(), Application.getDbHelper().getReadableDatabase(), MusicSet.QUERY + " WHERE stage = ? ORDER BY begin_date ASC", new String[] { this.stage }); } @Override public void onLoadFinished(Loader<Cursor> loader, Cursor cursor) { Log.v("LineUpListFragment", String.format(Locale.ENGLISH, "Done loading sets for stage %s", this.stage)); this.adapter.swapCursor(cursor); } @Override public void onLoaderReset(Loader<Cursor> loader) { this.adapter.changeCursor(null); } public String getStage() { return this.stage; } }