Java tutorial
/* * CardInfoActivity.java * * Copyright (C) 2011 Eric Butler * * Authors: * Eric Butler <eric@codebutler.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 com.codebutler.farebot.activities; import android.content.Intent; import android.content.SharedPreferences; import android.database.Cursor; import android.net.Uri; import android.os.AsyncTask; import android.os.Bundle; import android.preference.PreferenceManager; import android.speech.tts.TextToSpeech; import android.speech.tts.TextToSpeech.OnInitListener; import android.support.v4.view.ViewPager; import android.util.Log; import android.view.View; import com.actionbarsherlock.app.ActionBar; import com.actionbarsherlock.app.SherlockFragmentActivity; import com.actionbarsherlock.view.Menu; import com.actionbarsherlock.view.MenuItem; import com.codebutler.farebot.R; import com.codebutler.farebot.TabPagerAdapter; import com.codebutler.farebot.UnsupportedCardException; import com.codebutler.farebot.Utils; import com.codebutler.farebot.fragments.CardBalanceFragment; import com.codebutler.farebot.fragments.CardInfoFragment; import com.codebutler.farebot.fragments.CardRefillsFragment; import com.codebutler.farebot.fragments.CardSubscriptionsFragment; import com.codebutler.farebot.fragments.CardTripsFragment; import com.codebutler.farebot.card.Card; import com.codebutler.farebot.provider.CardsTableColumns; import com.codebutler.farebot.transit.SuicaTransitData; import com.codebutler.farebot.transit.TransitData; public class CardInfoActivity extends SherlockFragmentActivity { public static final String EXTRA_TRANSIT_DATA = "transit_data"; public static final String SPEAK_BALANCE_EXTRA = "com.codebutler.farebot.speak_balance"; private static final String KEY_SELECTED_TAB = "selected_tab"; private Card mCard; private TransitData mTransitData; private TabPagerAdapter mTabsAdapter; private TextToSpeech mTTS; private OnInitListener mTTSInitListener = new OnInitListener() { public void onInit(int status) { if (status == TextToSpeech.SUCCESS) { mTTS.speak(getString(R.string.balance_speech, mTransitData.getBalanceString()), TextToSpeech.QUEUE_FLUSH, null); } } }; @Override protected void onCreate(final Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_card_info); final ViewPager viewPager = (ViewPager) findViewById(R.id.pager); mTabsAdapter = new TabPagerAdapter(this, viewPager); final ActionBar actionBar = getSupportActionBar(); actionBar.setDisplayHomeAsUpEnabled(true); actionBar.setTitle(R.string.loading); new AsyncTask<Void, Void, Void>() { private Exception mException; public boolean mSpeakBalanceEnabled; @Override protected Void doInBackground(Void... voids) { try { Uri uri = getIntent().getData(); Cursor cursor = getContentResolver().query(uri, null, null, null, null); startManagingCursor(cursor); cursor.moveToFirst(); String data = cursor.getString(cursor.getColumnIndex(CardsTableColumns.DATA)); mCard = Card.fromXml(data); mTransitData = mCard.parseTransitData(); SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(CardInfoActivity.this); mSpeakBalanceEnabled = prefs.getBoolean("pref_key_speak_balance", false); } catch (Exception ex) { mException = ex; } return null; } @Override protected void onPostExecute(Void aVoid) { findViewById(R.id.loading).setVisibility(View.GONE); findViewById(R.id.pager).setVisibility(View.VISIBLE); if (mException != null) { if (mCard == null) { Utils.showErrorAndFinish(CardInfoActivity.this, mException); } else { Log.e("CardInfoActivity", "Error parsing transit data", mException); showAdvancedInfo(mException); finish(); } return; } if (mTransitData == null) { showAdvancedInfo(new UnsupportedCardException()); finish(); return; } String titleSerial = (mTransitData.getSerialNumber() != null) ? mTransitData.getSerialNumber() : Utils.getHexString(mCard.getTagId(), ""); actionBar.setTitle(mTransitData.getCardName() + " " + titleSerial); Bundle args = new Bundle(); args.putParcelable(AdvancedCardInfoActivity.EXTRA_CARD, mCard); args.putParcelable(EXTRA_TRANSIT_DATA, mTransitData); mTabsAdapter.addTab(actionBar.newTab().setText(R.string.balance), CardBalanceFragment.class, args); if (mTransitData.getTrips() != null) { int textId = (mTransitData instanceof SuicaTransitData) ? R.string.history : R.string.trips; mTabsAdapter.addTab(actionBar.newTab().setText(textId), CardTripsFragment.class, args); } if (mTransitData.getRefills() != null) { mTabsAdapter.addTab(actionBar.newTab().setText(R.string.refills), CardRefillsFragment.class, args); } if (mTransitData.getSubscriptions() != null) { mTabsAdapter.addTab(actionBar.newTab().setText(R.string.subscriptions), CardSubscriptionsFragment.class, args); } if (mTransitData.getInfo() != null) { mTabsAdapter.addTab(actionBar.newTab().setText(R.string.info), CardInfoFragment.class, args); } if (mTabsAdapter.getCount() > 1) { actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS); } boolean speakBalanceRequested = getIntent().getBooleanExtra(SPEAK_BALANCE_EXTRA, false); if (mSpeakBalanceEnabled && speakBalanceRequested) { mTTS = new TextToSpeech(CardInfoActivity.this, mTTSInitListener); } if (savedInstanceState != null) { viewPager.setCurrentItem(savedInstanceState.getInt(KEY_SELECTED_TAB, 0)); } } }.execute(); } @Override protected void onSaveInstanceState(Bundle bundle) { bundle.putInt(KEY_SELECTED_TAB, ((ViewPager) findViewById(R.id.pager)).getCurrentItem()); } @Override public boolean onCreateOptionsMenu(Menu menu) { getSupportMenuInflater().inflate(R.menu.card_info_menu, menu); return true; } @Override public boolean onOptionsItemSelected(MenuItem item) { if (item.getItemId() == android.R.id.home) { Intent intent = new Intent(this, CardsActivity.class); intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP); startActivity(intent); return true; } else if (item.getItemId() == R.id.advanced_info) { showAdvancedInfo(null); return true; } return false; } private void showAdvancedInfo(Exception ex) { Intent intent = new Intent(this, AdvancedCardInfoActivity.class); intent.putExtra(AdvancedCardInfoActivity.EXTRA_CARD, mCard); if (ex != null) { intent.putExtra(AdvancedCardInfoActivity.EXTRA_ERROR, ex); } startActivity(intent); } }