Java tutorial
/* This file is part of My Expenses. * My Expenses 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. * * My Expenses 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 My Expenses. If not, see <http://www.gnu.org/licenses/>. */ package org.totschnig.myexpenses.fragment; import java.util.ArrayList; import org.totschnig.myexpenses.R; import org.totschnig.myexpenses.activity.ProtectedFragmentActivity; import org.totschnig.myexpenses.dialog.EditTextDialog; import org.totschnig.myexpenses.provider.DatabaseConstants; import org.totschnig.myexpenses.provider.TransactionProvider; import org.totschnig.myexpenses.task.TaskExecutionFragment; import org.totschnig.myexpenses.ui.SimpleCursorAdapter; import android.annotation.SuppressLint; import android.database.Cursor; import android.os.Build; import android.os.Bundle; import android.support.v4.app.LoaderManager; import android.support.v4.content.CursorLoader; import android.support.v4.content.Loader; import android.util.SparseBooleanArray; import android.view.ContextMenu; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.ListView; import android.widget.AdapterView.AdapterContextMenuInfo; import android.widget.Toast; public class PartiesList extends ContextualActionBarFragment implements LoaderManager.LoaderCallbacks<Cursor> { SimpleCursorAdapter mAdapter; private Cursor mPartiesCursor; @Override public boolean dispatchCommandSingle(int command, ContextMenu.ContextMenuInfo info) { AdapterContextMenuInfo menuInfo = (AdapterContextMenuInfo) info; switch (command) { case R.id.EDIT_COMMAND: Bundle args = new Bundle(); args.putLong(DatabaseConstants.KEY_ROWID, menuInfo.id); args.putString(EditTextDialog.KEY_DIALOG_TITLE, getString(R.string.menu_edit_party)); args.putString(EditTextDialog.KEY_VALUE, mPartiesCursor.getString(mPartiesCursor.getColumnIndex(DatabaseConstants.KEY_PAYEE_NAME))); EditTextDialog.newInstance(args).show(getActivity().getSupportFragmentManager(), "EDIT_PARTY"); return true; } return super.dispatchCommandSingle(command, info); } @Override public boolean dispatchCommandMultiple(int command, SparseBooleanArray positions, Long[] itemIds) { switch (command) { case R.id.DELETE_COMMAND: int columnIndexMappedTransactions = mPartiesCursor .getColumnIndex(DatabaseConstants.KEY_MAPPED_TRANSACTIONS); int columnIndexMappedTemplates = mPartiesCursor.getColumnIndex(DatabaseConstants.KEY_MAPPED_TEMPLATES); int columnIndexRowId = mPartiesCursor.getColumnIndex(DatabaseConstants.KEY_ROWID); int mappedTransactionsCount = 0, mappedTemplatesCount = 0; ArrayList<Long> idList = new ArrayList<>(); for (int i = 0; i < positions.size(); i++) { if (positions.valueAt(i)) { boolean deletable = true; mPartiesCursor.moveToPosition(positions.keyAt(i)); if (mPartiesCursor.getInt(columnIndexMappedTransactions) > 0) { mappedTransactionsCount++; deletable = false; } if (mPartiesCursor.getInt(columnIndexMappedTemplates) > 0) { mappedTemplatesCount++; deletable = false; } if (deletable) { idList.add(mPartiesCursor.getLong(columnIndexRowId)); } } } if (!idList.isEmpty()) { ((ProtectedFragmentActivity) getActivity()).startTaskExecution( TaskExecutionFragment.TASK_DELETE_PAYEES, idList.toArray(new Long[idList.size()]), null, R.string.progress_dialog_deleting); return true; } if (mappedTransactionsCount > 0 || mappedTemplatesCount > 0) { String message = ""; if (mappedTransactionsCount > 0) message += getResources().getQuantityString(R.plurals.not_deletable_mapped_transactions, mappedTransactionsCount, mappedTransactionsCount); if (mappedTemplatesCount > 0) message += getResources().getQuantityString(R.plurals.not_deletable_mapped_templates, mappedTemplatesCount, mappedTemplatesCount); Toast.makeText(getActivity(), message, Toast.LENGTH_LONG).show(); } break; } return super.dispatchCommandMultiple(command, positions, itemIds); } @Override @SuppressLint("InlinedApi") public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View v = inflater.inflate(R.layout.parties_list, container, false); final ListView lv = (ListView) v.findViewById(R.id.list); lv.setItemsCanFocus(false); //((TextView) findViewById(android.R.id.empty)).setText(R.string.no_parties); // Create an array to specify the fields we want to display in the list String[] from = new String[] { DatabaseConstants.KEY_PAYEE_NAME }; // and an array of the fields we want to bind those fields to int[] to = new int[] { android.R.id.text1 }; // Now create a simple cursor adapter and set it to display mAdapter = new SimpleCursorAdapter(getActivity(), Build.VERSION.SDK_INT >= 11 ? android.R.layout.simple_list_item_activated_1 : android.R.layout.simple_list_item_1, null, from, to, 0); getLoaderManager().initLoader(0, null, this); lv.setAdapter(mAdapter); lv.setEmptyView(v.findViewById(R.id.empty)); registerForContextualActionBar(lv); return v; } @Override public Loader<Cursor> onCreateLoader(int arg0, Bundle arg1) { CursorLoader cursorLoader = new CursorLoader(getActivity(), TransactionProvider.PAYEES_URI, null, null, null, null); return cursorLoader; } @Override public void onLoadFinished(Loader<Cursor> arg0, Cursor c) { mPartiesCursor = c; mAdapter.swapCursor(c); } @Override public void onLoaderReset(Loader<Cursor> arg0) { mPartiesCursor = null; mAdapter.swapCursor(null); } }