it.polimi.dima.mediatracker.utils

Class Utils

java.lang.Object

it.polimi.dima.mediatracker.utils.Utils

public class Utils
extends java.lang.Object

Misc utility methods

Constructor Summary

Constructors

Constructor and Description
Utils()

Method Summary

Modifier and Type	Method and Description
static int	arrayAverage(int[] array) Computes the average of the given integer array
static void	askPermissionsAtRuntimeIfNeeded(Activity activity, java.lang.String permission, View permissionRequestLayout, int permissionReminder, int requestCode) Runtime permissions request for API>=23
static boolean	isEmpty(java.lang.String string) Check if string is null or empty
static <T> java.util.List<T>	iteratorToList(java.util.Iterator<T> iterator) Translates and iterator to a list
static java.lang.String	joinIfNotEmpty(java.lang.CharSequence delimiter, java.lang.Object[] tokens) Wrapper for android.text.TextUtils#join(CharSequence, Object[]) that first checks if the token array is empty
static <K,V> java.util.HashMap<K,V>	listsToHashMap(java.util.List<K> keys, java.util.List<V> values) Translates two lists into an hashmap
static boolean	manageToolbarMenuSelection(Activity activity, int id) Helper to manage a menu option selection
static java.util.Date	parseDateFromString(java.lang.String dateString, java.lang.String format) Translates a string to a date using the provided format
static java.util.Date	parseDateFromYearMonthDay(int year, int month, int day) Creates a date object from year, month and day values
static int	parseInt(java.lang.String s) Wrapper for Integer.parseInt(String) that returns 0 in case of exception
static int	parseYearFromString(java.lang.String dateString, java.lang.String format) Similar to parseDateFromString(String, String) but returns only the year of the date
static int	randInt(int min, int max) Random integer between the two given values

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

Utils

public Utils()

Method Detail

iteratorToList

public static <T> java.util.List<T> iteratorToList(java.util.Iterator<T> iterator)

Translates and iterator to a list

Type Parameters:

T - the type of objects in the iterator

Parameters:

iterator - the iterator

Returns:

the list with all the iterator elements

listsToHashMap

public static <K,V> java.util.HashMap<K,V> listsToHashMap(java.util.List<K> keys,
                                                          java.util.List<V> values)

Translates two lists into an hashmap

Type Parameters:

K - keys type

V - values type

Parameters:

keys - list of keys

values - list of values

Returns:

the hashmap

parseDateFromString

public static java.util.Date parseDateFromString(java.lang.String dateString,
                                                 java.lang.String format)

Translates a string to a date using the provided format

Parameters:

dateString - the string containing the date

format - the format of the date in the string

Returns:

the date

parseYearFromString

public static int parseYearFromString(java.lang.String dateString,
                                      java.lang.String format)

Similar to parseDateFromString(String, String) but returns only the year of the date

parseDateFromYearMonthDay

public static java.util.Date parseDateFromYearMonthDay(int year,
                                                       int month,
                                                       int day)

Creates a date object from year, month and day values

Parameters:

year - the year (if 0 the returned date will be null)

month - the month (can be 0 if unknown)

day - the day (can be 0 if unknown)

Returns:

the date

joinIfNotEmpty

public static java.lang.String joinIfNotEmpty(java.lang.CharSequence delimiter,
                                              java.lang.Object[] tokens)

Wrapper for android.text.TextUtils#join(CharSequence, Object[]) that first checks if the token array is empty

isEmpty

public static boolean isEmpty(java.lang.String string)

Check if string is null or empty

Parameters:

string - the string to check

Returns:

true if null or ""

arrayAverage

public static int arrayAverage(int[] array)

Computes the average of the given integer array

Parameters:

array - the array

Returns:

the average value in the array

parseInt

public static int parseInt(java.lang.String s)

Wrapper for Integer.parseInt(String) that returns 0 in case of exception

askPermissionsAtRuntimeIfNeeded

public static void askPermissionsAtRuntimeIfNeeded(Activity activity,
                                                   java.lang.String permission,
                                                   View permissionRequestLayout,
                                                   int permissionReminder,
                                                   int requestCode)

Runtime permissions request for API>=23

Parameters:

activity - the requesting activity

permission - the permission

permissionRequestLayout - the main layout component displayed on screen

permissionReminder - the string shown as reminder if the user didn't accept the permission

requestCode - the request code

manageToolbarMenuSelection

public static boolean manageToolbarMenuSelection(Activity activity,
                                                 int id)

Helper to manage a menu option selection

Parameters:

activity - the activity

id - the ID of the option selected by the user

Returns:

true if this method managed the option, false otherwise

randInt

public static int randInt(int min,
                          int max)

Random integer between the two given values

Parameters:

min - min value (included)

max - max value (included)

Returns:

a random integer