Java tutorial
/* * The MIT License (MIT) * * Copyright (c) 2016 Carlos Andres Jimenez <apps@carlosandresjimenez.co> * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package co.carlosjimenez.android.currencyalerts.app; import android.content.DialogInterface; import android.content.Intent; import android.database.Cursor; import android.net.Uri; import android.os.Bundle; import android.os.Handler; import android.support.v4.app.Fragment; import android.support.v4.app.LoaderManager; import android.support.v4.content.CursorLoader; import android.support.v4.content.Loader; import android.support.v7.app.AlertDialog; import android.support.v7.app.AppCompatActivity; import android.support.v7.widget.Toolbar; import android.text.format.Time; import android.util.Log; import android.view.LayoutInflater; import android.view.Menu; import android.view.MenuInflater; import android.view.MenuItem; import android.view.View; import android.view.ViewGroup; import android.widget.ImageView; import android.widget.TextView; import com.bumptech.glide.Glide; import com.google.android.gms.ads.AdRequest; import com.google.android.gms.ads.AdView; import com.google.firebase.analytics.FirebaseAnalytics; import com.google.firebase.crash.FirebaseCrash; import butterknife.BindView; import butterknife.ButterKnife; import co.carlosjimenez.android.currencyalerts.app.data.Alert; import co.carlosjimenez.android.currencyalerts.app.data.Currency; import co.carlosjimenez.android.currencyalerts.app.data.ForexContract; /** * A placeholder fragment containing a detail view. */ public class DetailActivityFragment extends Fragment implements LoaderManager.LoaderCallbacks<Cursor> { private static final String LOG_TAG = DetailActivityFragment.class.getSimpleName(); static final String DETAIL_URI = "URI"; static final String CURRENCY_FROM = "CURRENCY_FROM"; static final String CURRENCY_TO = "CURRENCY_TO"; // These indices are tied to FOREX_COLUMNS. If FOREX_COLUMNS changes, these // must change. static final int COL_RATE_ID = 0; static final int COL_CURRENCY_FROM_ID = 1; static final int COL_CURRENCY_FROM_NAME = 2; static final int COL_CURRENCY_FROM_SYMBOL = 3; static final int COL_COUNTRY_FROM_CODE = 4; static final int COL_COUNTRY_FROM_NAME = 5; static final int COL_COUNTRY_FROM_FLAG = 6; static final int COL_CURRENCY_TO_ID = 7; static final int COL_CURRENCY_TO_NAME = 8; static final int COL_CURRENCY_TO_SYMBOL = 9; static final int COL_COUNTRY_TO_CODE = 10; static final int COL_COUNTRY_TO_NAME = 11; static final int COL_COUNTRY_TO_FLAG = 12; static final int COL_RATE_DATE = 13; static final int COL_RATE_VAL = 14; private static final int DETAIL_LOADER = 0; private static final int DEFAULT_DAYS_FOREX_AVERAGE = 30; @BindView(R.id.detail_period_textview) TextView mTvPeriod; @BindView(R.id.detail_max_rate_textview) TextView mTvMaxRate; @BindView(R.id.detail_min_rate_textview) TextView mTvMinRate; @BindView(R.id.detail_average_textview) TextView mTvAverageRate; @BindView(R.id.currencyFromFlag) ImageView mIvFlagFrom; @BindView(R.id.currencyToFlag) ImageView mIvFlagTo; @BindView(R.id.currencyFromDescription) TextView mTvCurrencyFromDesc; @BindView(R.id.currencyToDescription) TextView mTvCurrencyToDesc; @BindView(R.id.currencyFromRate) TextView mTvCurrencyFromRate; @BindView(R.id.currencyToRate) TextView mTvCurrencyToRate; @BindView(R.id.toolbar) Toolbar mToolbar; @BindView(R.id.adView) AdView mAdView; private final Handler mHandler = new Handler(); private static final int AD_DELAY_MILLISECONDS = 1000; private Uri mUri; private AppCompatActivity mContext; private FirebaseAnalytics mFirebaseAnalytics; private static final String FOREX_SHARE_HASHTAG = " #CurrencyRatesApp"; private String mDisplayedCurrencyIds; private String mDisplayedCurrencyNames; private String mDisplayedRate; private String mCurrencyFromId; private String mCurrencyToId; public DetailActivityFragment() { setHasOptionsMenu(true); } @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View rootView = inflater.inflate(R.layout.fragment_detail, container, false); ButterKnife.bind(this, rootView); Bundle arguments = getArguments(); if (arguments != null) { mUri = arguments.getParcelable(DETAIL_URI); } mContext = (AppCompatActivity) getActivity(); mFirebaseAnalytics = FirebaseAnalytics.getInstance(mContext); if (mToolbar != null) { mContext.setSupportActionBar(mToolbar); mContext.getSupportActionBar().setDisplayHomeAsUpEnabled(true); mContext.getSupportActionBar().setDisplayShowTitleEnabled(false); } // Ad is delayed some seconds as this affects the performance mHandler.postDelayed(new Runnable() { @Override public void run() { loadAd(); } }, AD_DELAY_MILLISECONDS); return rootView; } @Override public void onActivityCreated(Bundle savedInstanceState) { getLoaderManager().initLoader(DETAIL_LOADER, null, this); super.onActivityCreated(savedInstanceState); } @Override public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) { if (getActivity() instanceof DetailActivity) { // Inflate the menu; this adds items to the action bar if it is present. inflater.inflate(R.menu.detailfragment, menu); finishCreatingMenu(menu); } } @Override public boolean onOptionsItemSelected(MenuItem item) { // Handle action bar item clicks here. The action bar will // automatically handle clicks on the Home/Up button, so long // as you specify a parent activity in AndroidManifest.xml. switch (item.getItemId()) { case R.id.action_share: sendShareHitToAnalytics(mDisplayedCurrencyIds, mDisplayedCurrencyNames); break; case android.R.id.home: mContext.finishAfterTransition(); return true; case R.id.action_alert: openAlertDialog(); return true; } return super.onOptionsItemSelected(item); } private void finishCreatingMenu(Menu menu) { // Retrieve the share menu item MenuItem menuItem = menu.findItem(R.id.action_share); menuItem.setIntent(createShareForecastIntent()); menuItem = menu.findItem(R.id.action_alert); MenuTint.colorMenuItem(menuItem, getResources().getColor(R.color.detail_toolbar_icon_color), null); } private Intent createShareForecastIntent() { Intent shareIntent = new Intent(Intent.ACTION_SEND); shareIntent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET); shareIntent.setType("text/plain"); shareIntent.putExtra(Intent.EXTRA_TEXT, mDisplayedRate + FOREX_SHARE_HASHTAG); return shareIntent; } @Override public Loader<Cursor> onCreateLoader(int id, Bundle args) { if (null != mUri) { // Now create and return a CursorLoader that will take care of // creating a Cursor for the data being displayed. return new CursorLoader(getActivity(), mUri, ForexContract.RATE_CURRENCY_COLUMNS, null, null, ForexContract.RateEntry.COLUMN_RATE_DATE + " DESC"); } return null; } @Override public void onLoadFinished(Loader<Cursor> loader, Cursor data) { if (data == null) { Log.d(LOG_TAG, "Detail Forex Loader Finished: No data returned"); return; } if (!data.moveToFirst()) { Log.d(LOG_TAG, "Detail Forex Loader Finished: No data returned"); data.close(); return; } long lDate = 0; String sDate = ""; String sCurrency = ""; int i = 0; double dRateAverage = 0; double dVal = 0; double dMinVal = 0; double dMaxVal = 0; data.moveToPosition(0); mCurrencyFromId = data.getString(COL_CURRENCY_FROM_ID); String currencyFromName = data.getString(COL_CURRENCY_FROM_NAME); String currencyFromSymbol = data.getString(COL_CURRENCY_FROM_SYMBOL); String countryFromName = data.getString(COL_COUNTRY_FROM_NAME); double currencyFromRate = ForexContract.RateEntry.getRateFromUri(mUri); mCurrencyToId = data.getString(COL_CURRENCY_TO_ID); String currencyToName = data.getString(COL_CURRENCY_TO_NAME); String currencyToSymbol = data.getString(COL_CURRENCY_TO_SYMBOL); String countryToName = data.getString(COL_COUNTRY_TO_NAME); double currencyToRate = ForexContract.RateEntry.getRateFromUri(mUri) * data.getDouble(COL_RATE_VAL); Glide.with(getActivity()).load(data.getString(COL_COUNTRY_FROM_FLAG)).error(R.drawable.globe).crossFade() .into(mIvFlagFrom); mIvFlagFrom.setContentDescription(Utility.formatCountryFlagName(mContext, countryFromName)); Glide.with(getActivity()).load(data.getString(COL_COUNTRY_TO_FLAG)).error(R.drawable.globe).crossFade() .into(mIvFlagTo); mIvFlagFrom.setContentDescription(Utility.formatCountryFlagName(mContext, countryToName)); mTvCurrencyFromDesc.setText(currencyFromName); mTvCurrencyFromDesc.setContentDescription(currencyFromName); mTvCurrencyFromRate .setText(Utility.formatCurrencyRate(getActivity(), currencyFromSymbol, currencyFromRate)); mTvCurrencyFromRate.setContentDescription(String.valueOf(currencyFromRate) + " " + currencyFromName); mTvCurrencyToDesc.setText(currencyToName); mTvCurrencyToDesc.setContentDescription(currencyToName); mTvCurrencyToRate.setText(Utility.formatCurrencyRate(getActivity(), currencyToSymbol, currencyToRate)); mTvCurrencyToRate.setContentDescription(String.valueOf(currencyToRate) + " " + currencyToName); Time dayTime = new Time(); dayTime.setToNow(); int julianDate = Time.getJulianDay(System.currentTimeMillis(), dayTime.gmtoff); dayTime = new Time(); long lMinDate = dayTime.setJulianDay(julianDate - DEFAULT_DAYS_FOREX_AVERAGE); sDate = Utility.getDateString(getActivity(), data.getLong(COL_RATE_DATE)); for (i = 0; i < data.getCount() && i < DEFAULT_DAYS_FOREX_AVERAGE; i++) { data.moveToPosition(i); lDate = data.getLong(COL_RATE_DATE); if (lDate < lMinDate) { break; } sCurrency = data.getString(COL_CURRENCY_TO_ID); sDate = Utility.getDateString(getActivity(), lDate); dVal = data.getDouble(COL_RATE_VAL); dRateAverage += dVal; if (i == 0) { dMinVal = dVal; dMaxVal = dVal; } else { dMinVal = dMinVal < dVal ? dMinVal : dVal; dMaxVal = dMaxVal > dVal ? dMaxVal : dVal; } } dRateAverage = dRateAverage / i; if (data.getCount() > 1) mTvPeriod.setText(data.getCount() + " days"); else mTvPeriod.setText(data.getCount() + " day"); mTvMaxRate.setContentDescription(mTvPeriod.getText()); mTvMaxRate.setText( Utility.formatCurrencyRate(getActivity(), data.getString(COL_CURRENCY_TO_SYMBOL), dMaxVal)); mTvMaxRate.setContentDescription(mTvMaxRate.getText()); mTvMinRate.setText( Utility.formatCurrencyRate(getActivity(), data.getString(COL_CURRENCY_TO_SYMBOL), dMinVal)); mTvMinRate.setContentDescription(mTvMinRate.getText()); mTvAverageRate.setText( Utility.formatCurrencyRate(getActivity(), data.getString(COL_CURRENCY_TO_SYMBOL), dRateAverage)); mTvAverageRate.setContentDescription(mTvAverageRate.getText()); // String text to share if user clicks on share menu icon mDisplayedRate = String.format("%s - %s %s = %s %s", sDate, currencyFromRate, mCurrencyFromId, currencyToRate, mCurrencyToId); mDisplayedCurrencyIds = mCurrencyFromId + "-" + mCurrencyToId; mDisplayedCurrencyNames = currencyToName; mContext.supportStartPostponedEnterTransition(); if (null != mToolbar) { Menu menu = mToolbar.getMenu(); if (null != menu) menu.clear(); mToolbar.inflateMenu(R.menu.detailfragment); finishCreatingMenu(mToolbar.getMenu()); } } @Override public void onLoaderReset(Loader<Cursor> loader) { } /** * Helper method to load the a Google Ad */ public void loadAd() { if (mAdView != null) { AdRequest adRequest = new AdRequest.Builder().build(); mAdView.loadAd(adRequest); } } /** * Helper method to send the share hit to Google Analytics * * @param currencyIds String containing the currency ids * @param currencyNames String containing the currency_to name */ private void sendShareHitToAnalytics(String currencyIds, String currencyNames) { Bundle payload = new Bundle(); payload.putString(FirebaseAnalytics.Param.ITEM_ID, currencyIds); payload.putString(FirebaseAnalytics.Param.ITEM_NAME, currencyNames); payload.putString(FirebaseAnalytics.Param.CONTENT_TYPE, "text/html"); mFirebaseAnalytics.logEvent(FirebaseAnalytics.Event.SHARE, payload); } /** * Helper method to decide if we open the create alert dialog or we show a notification * that there is an alert enabled and it will be overwritten with this action. */ public void openAlertDialog() { Alert alert = Utility.getAlertSettings(mContext, false); if (alert == null) { return; } if (alert.getCurrencyFrom() == null) { FirebaseCrash.report(new Exception("Alert Currency From is NULL")); return; } if (alert.getCurrencyTo() == null) { FirebaseCrash.report(new Exception("Alert Currency To is NULL")); return; } if (alert.isEnabled() && (!alert.getCurrencyFrom().getId().equals(mCurrencyFromId) || !alert.getCurrencyTo().getId().equals(mCurrencyToId))) { openExistingAlertDialog(alert.getCurrencyFrom().getId(), alert.getCurrencyTo().getId()); } else { openCreateAlertDialog(); } } /** * Helper method to open a create alert dialog */ private void openCreateAlertDialog() { Bundle arguments = new Bundle(); arguments.putParcelable(DetailActivityFragment.CURRENCY_FROM, new Currency(mCurrencyFromId)); arguments.putParcelable(DetailActivityFragment.CURRENCY_TO, new Currency(mCurrencyToId)); AddAlertFragment fragment = new AddAlertFragment(); fragment.setArguments(arguments); fragment.show(mContext.getSupportFragmentManager(), null); } /** * Helper method to open a notification that there is an existing alert * * @param currencyFrom String containing the currency from id * @param currencyTo String containing the currency to id */ private void openExistingAlertDialog(String currencyFrom, String currencyTo) { AlertDialog.Builder alertDialogBuilder = new AlertDialog.Builder(mContext); // set dialog message alertDialogBuilder.setMessage(getString(R.string.dialog_existing_alert, currencyFrom, currencyTo)) .setCancelable(false).setPositiveButton("Yes", new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int id) { dialog.dismiss(); openCreateAlertDialog(); } }).setNegativeButton("No", new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int id) { // if this button is clicked, just close // the dialog box and do nothing dialog.cancel(); } }); // create alert dialog AlertDialog alertDialog = alertDialogBuilder.create(); // show it alertDialog.show(); } }