How to enable night mode programmatically?

Question

I am looking for a way to enable night mode programmatically with an Android code:

public static void setNightMode(Context target, boolean state){

    UiModeManager uiManager = (UiModeManager) target.getSystemService(Context.UI_MODE_SERVICE);

    if (state) {
        //uiManager.enableCarMode(0);
        uiManager.setNightMode(UiModeManager.MODE_NIGHT_YES);
    } else {
        // uiManager.disableCarMode(0);
        uiManager.setNightMode(UiModeManager.MODE_NIGHT_NO);
    }
}

Nothing has changed on my screen, the night mode is still disables. According to this link

There is no need to enable carMode or deskMode. I have the following logcat on Android Studio:

11-26 12:15:16.662 3823-3823/? D/UiModeManager: updateConfigurationLocked: mDockState=0; mCarMode=false; mNightMode=2; uiMode=33
11-26 12:15:26.802 3823-3823/? V/UiModeManager: updateLocked: null action, mDockState=0, category=null

try this https://stackoverflow.com/questions/31934503/to-implement-android-night-mode-using-uimodemanager-and-enable-car-mode-but-sh — Munir, Nov 26 '17 at 11:34
I want to change night mode everywhere ,not in my app.I don't need to switch some themes. — Ilan, Nov 26 '17 at 11:44
Did you check this note? "Note: On API 22 and below, changes to the night mode are only effective when the car or desk mode is enabled on a device. Starting in API 23, changes to night mode are always effective." — Google, Mar 29 '18 at 06:00
Were you able to solve this issue? I am struggling with setNightMode and I am not able to get it on Android 10 or 11 — Ton, Nov 19 '20 at 08:28

Kishan Solanki · Accepted Answer · 2021-04-18T06:00:22.897

SIMPLEST SOLUTION

You can enable/disable application's dark theme just by:

enable dark theme:

 AppCompatDelegate.setDefaultNightMode(AppCompatDelegate.MODE_NIGHT_YES)

forcefully disable dark theme:

 AppCompatDelegate.setDefaultNightMode(AppCompatDelegate.MODE_NIGHT_NO)

set app theme based on mobile settings of dark mode, i.e. if dark mode is enabled then the theme will be set to a dark theme, if not then the default theme, but this will only work in version >= Android version Q (10)
```
 AppCompatDelegate.setDefaultNightMode(AppCompatDelegate.MODE_NIGHT_FOLLOW_SYSTEM)
```

Notes:

Your base theme for app/activity should be

"Theme.AppCompat.DayNight"

like

<style name="DarkTheme" parent="Theme.AppCompat.DayNight">
    <item name="windowActionBar">false</item>
    <item name="windowNoTitle">true</item>
</style>

Your res folder's names would end with -night so that different colors and images you can set for day and night themes like

drawable & drawable-night,
values & values-night

Unless I am wrong, I believe OP was looking for a way to change night mode device-wise. Your code works perfectly fine app-wise. As I was looking for a way to change for the whole device, `UiManager` seems the right class to do so. — Mackovich, Aug 24 '20 at 15:49

score 18 · Answer 2 · answered May 14 '19 at 06:47

18

Make sure to change the default theme from Theme.AppCompat.Light.DarkActionBar to Theme.AppCompat.DayNight.DarkActionBar in the styles.xml file and then do AppCompatDelegate.setDefaultNightMode(AppCompatDelegate.MODE_NIGHT_YES) to switch to the night mode. I have tested it in APIv23(Android 6.0) and above and it is working fine. For a better explanation see this codelab by Android

answered May 14 '19 at 06:47

Neeraj Sewani

3,952
6
38
55

Hello Neeraj Sewani. I am trying to set an app that simply toggles the value of Night mode in the whole device. I am using uiManager.setNightMode(UiModeManager.MODE_NIGHT_YES) or MODE_NIGHT_NO. But I am not able to get it. Do I also have to change the "default theme" in my app? I don't mind how my app is displayed. I just want to change the device Night mode. Thanks. – Ton Nov 19 '20 at 08:32

score 6 · Answer 3 · edited May 31 '21 at 09:49

This code is working perfectly for me, though you may just need to restart your app. But keep in mind, that this code enables the Dark Mode system-wide, not just in the app:

public static void setNightMode(Context target , boolean state){

    UiModeManager uiManager = (UiModeManager) target.getSystemService(Context.UI_MODE_SERVICE);

    if (VERSION.SDK_INT <= 22) {
        uiManager.enableCarMode(0);
    }
    
    if (state) {
        uiManager.setNightMode(UiModeManager.MODE_NIGHT_YES);
    } else {
        uiManager.setNightMode(UiModeManager.MODE_NIGHT_NO);
    }
}

This worked for me in Kitkat.

Bitwise DEVS · Answer 4 · 2022-08-03T19:31:19.127

Remember that Dark Mode is not Night Mode. They are completely different. DM was introduce in Android 10 that enforce built-in black and white color while NM was release in earlier version that uses either default/custom style commonly called as Resource Qualifiers. If you want to handle your own custom light/night style and not relying on Android's built-in dark style, you may want to set forceDarkAllowed to false in themes.xml or style.xml to avoid conflict.

To change your app mode to night you use AppCompatDelegate.

// This will be the top level handling of theme
        AppCompatDelegate.setDefaultNightMode(
            if (userPrefModeIsNight)
                AppCompatDelegate.MODE_NIGHT_YES
            else
                AppCompatDelegate.MODE_NIGHT_NO)

score 1 · Answer 5 · answered Mar 11 '22 at 22:56

1

One more thing: your Activity needs to extend from AppCompatActivity.

If it extends the plain Activity, then calling AppCompatDelegate.setDefaultNightMode will not work.

answered Mar 11 '22 at 22:56

Gert-Jan

327
1
9

score 0 · Answer 6 · answered Jul 26 '22 at 13:49

0

int nightModeFlags =
getContext().getResources().getConfiguration().uiMode &
Configuration.UI_MODE_NIGHT_MASK;
switch (nightModeFlags) {
case Configuration.UI_MODE_NIGHT_YES:
     doStuff();
     break;

case Configuration.UI_MODE_NIGHT_NO:
     doStuff();
     break;

case Configuration.UI_MODE_NIGHT_UNDEFINED:
     doStuff();
     break;
}

answered Jul 26 '22 at 13:49

Himanshu Yadav Anshu

140
1
8

Your answer could be improved with additional supporting information. Please [edit] to add further details, such as citations or documentation, so that others can confirm that your answer is correct. You can find more information on how to write good answers [in the help center](/help/how-to-answer). – Community Jul 27 '22 at 20:28

score -1 · Answer 7 · answered Nov 26 '17 at 12:16

NightOwl has its own implementation for switching day/night mode on Android. Getting started with NightOwl is super easy. Here's a code snippet:

Init the NightOwl in Application class,

NightOwl.builder().defaultMode(0).create();

Call three method in your Activity class,

public class DemoActivity extends AppCompatActivity {
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        // step1 before super.onCreate
        NightOwl.owlBeforeCreate(this);

        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_demo);

        // step2 after setContentView
        NightOwl.owlAfterCreate(this);

        // write your code
    }

    @Override
    protected void onResume() {
        super.onResume();

        // step3 onResume
        NightOwl.owlResume(this);
    }

}

Switch skin everywhere as you like,

View v = findViewById(R.id.button);
v.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View v) {
        NightOwl.owlNewDress(SettingActivity.this);
    }
});

Google libraries will be the best choice – Vlad Jul 28 '20 at 08:55 — Vlad, Jul 28 '20 at 08:55

How to enable night mode programmatically?

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