/*
* Geopaparazzi - Digital field mapping on Android based devices
* Copyright (C) 2016 HydroloGIS (www.hydrologis.com)
*
* 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 eu.geopaparazzi.library.core.fragments;
import android.database.Cursor;
import android.database.SQLException;
import android.database.sqlite.SQLiteDatabase;
import android.os.Bundle;
import android.support.v4.app.ListFragment;
import android.support.v4.app.LoaderManager;
import android.support.v4.content.Loader;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import eu.geopaparazzi.library.GPApplication;
import eu.geopaparazzi.library.R;
import eu.geopaparazzi.library.database.DbCursorAdapter;
import eu.geopaparazzi.library.database.RawSqlCursorLoader;
import eu.geopaparazzi.library.util.GPDialogs;
import eu.geopaparazzi.library.util.LibraryConstants;
/**
* A generic database list fragment.
*
* @author Andrea Antonello (www.hydrologis.com)
*/
public class DatabaseListFragment extends ListFragment implements LoaderManager.LoaderCallbacks<Cursor> {
private DbCursorAdapter mCursorAdapter;
private static final int LOADER_ID = 1;
private SQLiteDatabase mDatabase;
private String mSql;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
super.onCreateView(inflater, container, savedInstanceState);
View v = inflater.inflate(R.layout.fragment_databaselist, container, false);
Bundle arguments = getArguments();
mSql = arguments.getString(LibraryConstants.PREFS_KEY_QUERY);
try {
mDatabase = GPApplication.getInstance().getDatabase();
if (!mDatabase.isOpen()) {
mDatabase = null;
}
} catch (Exception e) {
e.printStackTrace();
}
try {
if (mDatabase != null && mSql != null) {
mCursorAdapter = new DbCursorAdapter(getActivity(), null);
setListAdapter(mCursorAdapter);
LoaderManager loaderManager = getLoaderManager();
loaderManager.initLoader(LOADER_ID, null, this);
}
} catch (SQLException e) {
GPDialogs.warningDialog(getActivity(), "An error occurred while launching the query: " + e.getLocalizedMessage(),
new Runnable() {
public void run() {
getActivity().finish();
}
});
}
return v;
}
@Override
public Loader<Cursor> onCreateLoader(int id, Bundle args) {
RawSqlCursorLoader cl = new RawSqlCursorLoader(getActivity(), mDatabase, mSql);
return cl;
}
@Override
public void onLoadFinished(Loader<Cursor> loader, Cursor data) {
switch (loader.getId()) {
case LOADER_ID:
// The asynchronous load is complete and the data
// is now available for use. Only now can we associate
// the queried Cursor with the CursorAdapter.
mCursorAdapter.swapCursor(data);
break;
}
}
@Override
public void onLoaderReset(Loader<Cursor> loader) {
// For whatever reason, the Loader's data is now unavailable.
// Remove any references to the old data by replacing it with
// a null Cursor.
mCursorAdapter.swapCursor(null);
}
}