Java tutorial
/* * Copyright (C) 2012 Davy Leggieri * * 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ package com.bydavy.card.receipts.fragments; import java.util.Calendar; import android.app.Activity; import android.content.ContentValues; import android.os.Bundle; import android.support.v4.app.Fragment; import android.support.v4.app.FragmentTransaction; import android.text.TextUtils; import android.view.LayoutInflater; import android.view.View; import android.view.View.OnClickListener; import android.view.ViewGroup; import android.widget.AutoCompleteTextView; import android.widget.EditText; import android.widget.TextView; import android.widget.Toast; import com.actionbarsherlock.app.SherlockFragment; import com.bydavy.card.receipts.R; import com.bydavy.card.receipts.ShopSuggestionAdapter; import com.bydavy.card.receipts.providers.Receipts; import com.bydavy.card.receipts.providers.ReceiptsHelper; import com.bydavy.card.receipts.utils.CurrencyFormat; import com.bydavy.card.receipts.utils.LogHelper; import com.bydavy.card.receipts.utils.LogHelper.ErrorID; import com.bydavy.card.receipts.utils.MyDateFormat; public class ReceiptAddFragment extends SherlockFragment { /** Change first statement of if condition to enable class debug **/ private static final boolean DEBUG = LogHelper.DEBUG ? false : LogHelper.DEFAULT_DEBUG; private static final String DEBUG_PREFIX = ReceiptAddFragment.class.getName(); public static final String ARG_RECEIPT_ID = "receiptId"; public static final String ARG_MODE = "mode"; private static final String STATE_SHOP = "addReceiptShop"; private static final String STATE_DATE = "addReceiptDate"; private static final String STATE_NOTE = "addReceiptNote"; private static final String STATE_TOTAL = "addReceiptTotal"; private static final String DATE_PICKER_DIALOG_FRAGMENT_TAG = "dateFrag"; private MyDateFormat mDateFormat; private CurrencyFormat mCurrencyFormat; private final Calendar mCalendar = Calendar.getInstance(); private AutoCompleteTextView mViewShop; private TextView mViewDate; private EditText mViewNote; private EditText mViewTotal; public static ReceiptAddFragment newInstance() { return new ReceiptAddFragment(); } @Override public void onAttach(Activity activity) { super.onAttach(activity); mDateFormat = MyDateFormat.getDateFormat(activity); mCurrencyFormat = CurrencyFormat.getCurrencyFormat(activity); } @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { final View view = inflater.inflate(R.layout.fragment_receipt_edit, null); mViewShop = (AutoCompleteTextView) view.findViewById(R.id.shop); mViewShop.setAdapter(new ShopSuggestionAdapter(getActivity(), mViewShop)); mViewDate = (TextView) view.findViewById(R.id.date); mViewNote = (EditText) view.findViewById(R.id.note); mViewTotal = (EditText) view.findViewById(R.id.total); final TextView viewCurrency = (TextView) view.findViewById(R.id.currency); viewCurrency.setText(mCurrencyFormat.getCurrencySymbol()); mViewDate.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { showDatePickerDialog(); } }); return view; }; @Override public void onActivityCreated(Bundle savedInstanceState) { super.onActivityCreated(savedInstanceState); refreshView(savedInstanceState); } @Override public void onSaveInstanceState(Bundle outState) { outState.putString(STATE_SHOP, mViewShop.getText().toString()); outState.putLong(STATE_DATE, mCalendar.getTimeInMillis()); outState.putString(STATE_NOTE, STATE_NOTE); try { outState.putFloat(STATE_TOTAL, Float.valueOf(mViewTotal.getText().toString())); } catch (final NumberFormatException e) { /* Nothing */ } super.onSaveInstanceState(outState); } private void refreshView(Bundle savedInstanceState) { if (savedInstanceState == null) { mViewShop.setText(""); mViewNote.setText(""); mViewTotal.setText(""); } else { mCalendar.setTimeInMillis(savedInstanceState.getLong(STATE_DATE)); mViewShop.setText(savedInstanceState.getString(STATE_SHOP)); mViewNote.setText(savedInstanceState.getString(STATE_NOTE)); mViewTotal.setText(savedInstanceState.getString(STATE_TOTAL)); } refreshDate(); } private void refreshDate() { mViewDate.setText(mDateFormat.format(mCalendar.getTime())); } private void showDatePickerDialog() { final FragmentTransaction ft = getFragmentManager().beginTransaction(); final Fragment prev = getFragmentManager().findFragmentByTag(DATE_PICKER_DIALOG_FRAGMENT_TAG); if (prev != null) { ft.remove(prev); } ft.addToBackStack(null); final DatePickerDialogFragment dialog = DatePickerDialogFragment.newInstance(mCalendar.get(Calendar.YEAR), mCalendar.get(Calendar.MONTH), mCalendar.get(Calendar.DAY_OF_MONTH)); dialog.show(ft, DATE_PICKER_DIALOG_FRAGMENT_TAG); } public void setDate(int year, int monthOfYear, int dayOfMonth) { mCalendar.set(year, monthOfYear, dayOfMonth); refreshDate(); } public boolean save() { if (!isFieldsValid()) { return false; } return insertReceiptInDB(); } private boolean isFieldsValid() { final String shop = mViewShop.getText().toString(); if (TextUtils.isEmpty(shop)) { Toast.makeText(getActivity(), getResources().getString(R.string.fragment_receipt_edit__set_shop_msg), Toast.LENGTH_LONG).show(); return false; } final String tmpTotal = mViewTotal.getText().toString(); if (TextUtils.isEmpty(tmpTotal)) { Toast.makeText(getActivity(), getResources().getString(R.string.fragment_receipt_edit__set_total_msg), Toast.LENGTH_LONG).show(); return false; } try { Float.parseFloat(tmpTotal); } catch (final NumberFormatException e) { Toast.makeText(getActivity(), getResources().getString(R.string.fragment_receipt_edit__set_total_msg), Toast.LENGTH_LONG).show(); return false; } return true; } private boolean insertReceiptInDB() { final String shop = mViewShop.getText().toString(); final String tmpTotal = mViewTotal.getText().toString(); float total = 0; try { total = Float.parseFloat(tmpTotal); } catch (final NumberFormatException e) { /* Nothing */ } // Not required fields final String description = mViewNote.getText().toString(); final long date = mCalendar.getTimeInMillis() / 1000; final ContentValues receipt = ReceiptsHelper.toContentValues(shop, description, date, total, false, null); try { getActivity().getContentResolver().insert(Receipts.CONTENT_URI, receipt); } catch (final Exception e) { LogHelper.e(ErrorID.CONTENT_PROVIDER, "Cannot insert receipt in db: " + e, e); // TODO inform the user and ask if we can send a debug info to dev' return false; } return true; } }