What would be the easiest way to get the current day of the week in Android?
12 Answers
The Java Calendar
class works.
Calendar calendar = Calendar.getInstance();
int day = calendar.get(Calendar.DAY_OF_WEEK);
switch (day) {
case Calendar.SUNDAY:
// Current day is Sunday
break;
case Calendar.MONDAY:
// Current day is Monday
break;
case Calendar.TUESDAY:
// etc.
break;
}
For much better datetime handling consider using the Java 8 time API:
String day = LocalDate.now().getDayOfWeek().name()
To use this below Android SDK 26 you'll need to enable Java 8 desugaring in build.gradle:
android {
defaultConfig {
// Required when setting minSdkVersion to 20 or lower
multiDexEnabled true
}
compileOptions {
// Flag to enable support for the new language APIs
coreLibraryDesugaringEnabled true
// Sets Java compatibility to Java 8
sourceCompatibility JavaVersion.VERSION_1_8
targetCompatibility JavaVersion.VERSION_1_8
}
}
dependencies {
coreLibraryDesugaring 'com.android.tools:desugar_jdk_libs:1.0.9'
}
More information on Android's Java 8 support: https://developer.android.com/studio/write/java8-support
Calendar calendar = Calendar.getInstance();
Date date = calendar.getTime();
// 3 letter name form of the day
System.out.println(new SimpleDateFormat("EE", Locale.ENGLISH).format(date.getTime()));
// full name form of the day
System.out.println(new SimpleDateFormat("EEEE", Locale.ENGLISH).format(date.getTime()));
Result (for today):
Sat Saturday
UPDATE: java8
LocalDate date = LocalDate.now();
DayOfWeek dow = date.getDayOfWeek();
System.out.println("Enum = " + dow);
String dayName = dow.getDisplayName(TextStyle.FULL, Locale.ENGLISH);
System.out.println("FULL = " + dayName);
dayName = dow.getDisplayName(TextStyle.FULL_STANDALONE, Locale.ENGLISH);
System.out.println("FULL_STANDALONE = " + dayName);
dayName = dow.getDisplayName(TextStyle.NARROW, Locale.ENGLISH);
System.out.println("NARROW = " + dayName);
dayName = dow.getDisplayName(TextStyle.NARROW_STANDALONE, Locale.ENGLISH);
System.out.println("NARROW_STANDALONE = " + dayName);
dayName = dow.getDisplayName(TextStyle.SHORT, Locale.ENGLISH);
System.out.println("SHORT = " + dayName);
dayName = dow.getDisplayName(TextStyle.SHORT_STANDALONE, Locale.ENGLISH);
System.out.println("SHORT_STANDALONE = " + dayName);
Result (for today):
Enum = SATURDAY
FULL = Saturday
FULL_STANDALONE = Saturday
NARROW = S
NARROW_STANDALONE = 6
SHORT = Sat
SHORT_STANDALONE = Sat
Using both method you find easy if you wont last seven days you use (currentdaynumber+7-1)%7,(currentdaynumber+7-2)%7.....upto 6
public static String getDayName(int day){
switch(day){
case 0:
return "Sunday";
case 1:
return "Monday";
case 2:
return "Tuesday";
case 3:
return "Wednesday";
case 4:
return "Thursday";
case 5:
return "Friday";
case 6:
return "Saturday";
}
return "Worng Day";
}
public static String getCurrentDay(){
SimpleDateFormat dayFormat = new SimpleDateFormat("EEEE", Locale.US);
Calendar calendar = Calendar.getInstance();
return dayFormat.format(calendar.getTime());
}
you can use that code for Kotlin which you will use calendar class from java into Kotlin
val day = Calendar.getInstance().get(Calendar.DAY_OF_WEEK)
fun dayOfWeek() {
println("What day is it today?")
val day = Calendar.getInstance().get(Calendar.DAY_OF_WEEK)
println( when (day) {
1 -> "Sunday"
2 -> "Monday"
3 -> "Tuesday"
4 -> "Wednesday"
5 -> "Thursday"
6 -> "Friday"
7 -> "Saturday"
else -> "Time has stopped"
})
}
If you want to define the date string in strings.xml
. You can do like below.Calendar.DAY_OF_WEEK
return value from 1 -> 7
<=> Calendar.SUNDAY -> Calendar.SATURDAY
strings.xml
<string-array name="title_day_of_week">
<item>日</item> <!-- sunday -->
<item>月</item> <!-- monday -->
<item>火</item>
<item>水</item>
<item>木</item>
<item>金</item>
<item>土</item> <!-- saturday -->
</string-array>
DateExtension.kt
fun String.getDayOfWeek(context: Context, format: String): String {
val date = SimpleDateFormat(format, Locale.getDefault()).parse(this)
return date?.getDayOfWeek(context) ?: "unknown"
}
fun Date.getDayOfWeek(context: Context): String {
val c = Calendar.getInstance().apply { time = this@getDayOfWeek }
return context.resources.getStringArray(R.array.title_day_of_week)[c[Calendar.DAY_OF_WEEK] - 1]
}
Using
// get current day
val currentDay = Date().getDayOfWeek(context)
// get specific day
val dayString = "2021-1-4"
val day = dayString.getDayOfWeek(context, "yyyy-MM-dd")