Change timezone in android programmatically

Question

I wanted to change timezone in android programmatically like to set timezone as "America/Los_Angeles". How can I do this. How can this be possible by using id's.

score 21 · Accepted Answer · answered Dec 18 '14 at 06:16

21

In your AndroidManifest.xml

<uses-permission android:name="android.permission.SET_TIME_ZONE"/>

In your source:

AlarmManager am = (AlarmManager) getContext().getSystemService(Context.ALARM_SERVICE);
am.setTimeZone("America/Los_Angeles");

answered Dec 18 '14 at 06:16

Synesso

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I want to change the time zone locally for 3 different time zones. 1. EST(Eastern Standard Time). 2. CST(Central Standard Time). 3. AST(Atlantic Standard Time). From where I can select the key for the corresponding time zones?. – Nithinjith Apr 05 '17 at 09:40
Call `TimeZone.getAvailableIDs()` to get the list of known timezones for your system. – Synesso Aug 17 '17 at 00:10
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This permission is only allowed for system apps. – HHLV Mar 08 '18 at 09:59
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on android api 26 and 27 receive this error: setTimeZone: Neither user 10087 nor current process has android.permission.SET_TIME_ZONE. – Omid Ziyaee Dec 04 '18 at 08:50
change your code in AndroidManifest.xml to – Ferdiyan Syah Jul 30 '19 at 09:27
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I have the same @OmidZiyaee error. Have you found a solution? – Alessandro Caliaro Sep 08 '20 at 07:31

score 7 · Answer 2 · answered Oct 17 '12 at 07:31

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Abhishek's code simply defines a Calendar instance with a specific format to be used in the app, so that will not work.

It is not possible to change the phone's timezone programmatically. You could redirect the user to the appropriate settings, however:

startActivity(new Intent(android.provider.Settings.ACTION_DATE_SETTINGS));

answered Oct 17 '12 at 07:31

MarchingHome

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According to info from Synesso and HHLV, it is possible to set the time zone. Need to setup a permission and must be a system app. IDK how to setup as system app. Might not be possible for a regular (play store) app. But, I assume possible in some situations (i.e. embedded). – steve Aug 01 '23 at 15:27

score 5 · Answer 3 · answered Mar 19 '14 at 16:04

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If this is on a simulator or a device that you have root on, you could run

adb shell "su -c 'setprop persist.sys.timezone America/Los_Angeles; stop; sleep 5; start'"

answered Mar 19 '14 at 16:04

Reck

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Exactly what I was looking for. Thanks – David Refoua Jan 13 '18 at 03:52

score 4 · Answer 4 · edited May 23 '17 at 12:09

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Calendar calendar = Calendar.getInstance();       
SimpleDateFormat sdf = new SimpleDateFormat("dd-MMM-yyyy hh:mm:ss z");
sdf.setTimeZone(TimeZone.getTimeZone("America/Los_Angeles"));
System.out.println(sdf.format(calendar.getTime()));

Source

edited May 23 '17 at 12:09

Community

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answered Mar 06 '12 at 02:48

ACC

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That source is the answer to a different question and is not sufficient in this case. – MarchingHome Oct 17 '12 at 07:32
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Thanks. This answer somehow saved my life, because I kept set time zone on calendar instance only but not SimpleDateFormat, thats why I cannot get my shifted time anyway. I am at zone +8 for example, but I want my app display time from zone -7, this is what I want. Change it "programmatically". Voted up. – elliotching May 26 '19 at 14:26

score -1 · Answer 5 · answered Nov 11 '21 at 21:14

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You should have system signatures for setting timezones. if you are not manifacturer for your device may be you can contact them and ask for keystore files. after that you can sign your app as system with keystore file.

answered Nov 11 '21 at 21:14

YusufY

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Change timezone in android programmatically

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