Java tutorial
/* * Copyright 2016 Olivr Falvai * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package com.ofalvai.bpinfo.util; import android.app.Activity; import android.content.Context; import android.content.Intent; import android.graphics.Color; import android.graphics.ColorFilter; import android.graphics.LightingColorFilter; import android.graphics.drawable.Drawable; import android.net.Uri; import android.support.annotation.NonNull; import android.support.customtabs.CustomTabsIntent; import android.support.v4.content.ContextCompat; import android.support.v7.view.ContextThemeWrapper; import android.view.ViewGroup; import android.widget.TextView; import com.ofalvai.bpinfo.Config; import com.ofalvai.bpinfo.R; import com.ofalvai.bpinfo.model.Route; import org.joda.time.DateTime; import org.joda.time.LocalDate; public class UiUtils { /** * Transforms the start and end timestamps into a human-friendly readable string, * with special replacements for special dates, times, and the API's strange notations. * @param context Context * @param startTimestamp Start of the alert in seconds since the UNIX epoch * @param endTimestamp End of the alert in seconds since the UNIX epoch * @return A string in the format of [startdate] [starttime] [separator] [enddate] [endtime] */ @NonNull public static String alertDateFormatter(Context context, long startTimestamp, long endTimestamp) { DateTime startDateTime = new DateTime(startTimestamp * 1000L); DateTime endDateTime = new DateTime(endTimestamp * 1000L); LocalDate startDate = startDateTime.toLocalDate(); LocalDate endDate = endDateTime.toLocalDate(); DateTime today = new DateTime(); LocalDate todayDate = new DateTime().toLocalDate(); DateTime yesterday = today.minusDays(1); LocalDate yesterdayDate = yesterday.toLocalDate(); DateTime tomorrow = today.plusDays(1); LocalDate tomorrowDate = tomorrow.toLocalDate(); // Alert start, date part String startDateString; if (startDate.equals(todayDate)) { // Start day is today, replacing month and day with today string startDateString = context.getString(R.string.date_today) + " "; } else if (startDate.year().get() < today.year().get()) { // The start year is less than the current year, displaying the year too startDateString = Config.FORMATTER_DATE_YEAR.print(startDateTime); } else if (startDate.equals(yesterdayDate)) { startDateString = context.getString(R.string.date_yesterday) + " "; } else if (startDate.equals(tomorrowDate)) { startDateString = context.getString(R.string.date_tomorrow) + " "; } else { startDateString = Config.FORMATTER_DATE.print(startDateTime); } // Alert start, time part String startTimeString; if (startDateTime.hourOfDay().get() == 0 && startDateTime.minuteOfHour().get() == 0) { // The API marks "first departure" as 00:00 startTimeString = context.getString(R.string.date_first_departure); } else { startTimeString = Config.FORMATTER_TIME.print(startDateTime); } // Alert end, date part String endDateString; if (endTimestamp == 0) { // The API marks "until further notice" as 0 (in UNIX epoch), no need to display date // (the replacement string is displayed as the time part, not the date) endDateString = " "; } else if (endDate.year().get() > today.year().get()) { // The end year is greater than the current year, displaying the year too endDateString = Config.FORMATTER_DATE_YEAR.print(endDateTime); } else if (endDate.equals(todayDate)) { // End day is today, replacing month and day with today string endDateString = context.getString(R.string.date_today) + " "; } else if (endDate.equals(yesterdayDate)) { endDateString = context.getString(R.string.date_yesterday) + " "; } else if (endDate.equals(tomorrowDate)) { endDateString = context.getString(R.string.date_tomorrow) + " "; } else { endDateString = Config.FORMATTER_DATE.print(endDateTime); } // Alert end, time part String endTimeString; if (endTimestamp == 0) { // The API marks "until further notice" as 0 (in UNIX epoch) endTimeString = context.getString(R.string.date_until_revoke); } else if (endDateTime.hourOfDay().get() == 23 && endDateTime.minuteOfHour().get() == 59) { // The API marks "last departure" as 23:59 endTimeString = context.getString(R.string.date_last_departure); } else { endTimeString = Config.FORMATTER_TIME.print(endDateTime); } return startDateString + startTimeString + Config.DATE_SEPARATOR + endDateString + endTimeString; } /** * Adds a rectangular icon for the affected route. * * First it creates a TextView, then sets the style properties of the view. * The custom colored rounded background is achieved by a Drawable and a ColorFilter on top of that. */ public static void addRouteIcon(Context context, @NonNull ViewGroup root, @NonNull Route route) { ContextThemeWrapper iconContextTheme = new ContextThemeWrapper(context, R.style.RouteIcon); TextView iconView = new TextView(iconContextTheme); iconView.setText(route.getShortName()); iconView.setTextColor(route.getTextColor()); iconView.setContentDescription(Utils.getContentDescriptionForRoute(context, route)); root.addView(iconView); // Layout attributes defined in R.style.RouteIcon were ignored before attaching the view to // a parent, so we need to manually set them ViewGroup.MarginLayoutParams params = (ViewGroup.MarginLayoutParams) iconView.getLayoutParams(); params.width = ViewGroup.LayoutParams.WRAP_CONTENT; int margin = (int) context.getResources().getDimension(R.dimen.route_icon_margin); params.rightMargin = margin; params.topMargin = margin; // A requestLayout() call is not necessary here because the setBackground() method below // will call that anyway. //iconView.requestLayout(); // Setting a custom colored rounded background drawable as background Drawable iconBackground = context.getResources().getDrawable(R.drawable.rounded_corner_5dp); if (iconBackground != null) { ColorFilter colorFilter = new LightingColorFilter(Color.rgb(1, 1, 1), route.getColor()); iconBackground.mutate().setColorFilter(colorFilter); iconView.setBackground(iconBackground); } } /** * Opens a Chrome custom tab styled to the application's theme * @param activity Used for context and launching fallback intent * @param url URL to open */ public static void openCustomTab(Activity activity, Uri url) { String packageName = CustomTabsHelper.getPackageNameToUse(activity); if (packageName == null) { Intent intent = new Intent(Intent.ACTION_VIEW); intent.setData(url); activity.startActivity(intent); } else { CustomTabsIntent.Builder intentBuilder = new CustomTabsIntent.Builder(); int color = ContextCompat.getColor(activity, R.color.colorPrimary); intentBuilder.setToolbarColor(color); CustomTabsIntent customTabsIntent = intentBuilder.build(); customTabsIntent.intent.setPackage(packageName); customTabsIntent.launchUrl(activity, url); } } }