CODEWITHSUNDEEP
androidandroid-theme
Nikolai
Nikolai

Reputation: 841

Detect the Android device theme (is it dark or light)

You can set the theme for your app, but I'm wondering if it's possible to find out which one is used by the device. Currently, my app uses Theme.AppCompat.Light. I'd like to avoid changing the theme.

P.S. I've already tried to set it to Theme.DeviceDefault and access its ID using reflection, but no luck so far.

try {
    setTheme(android.R.style.Theme_DeviceDefault);

    Class<Context> contextClass = Context.class;
    Method getThemeMethod = contextClass.getMethod("getThemeResId");
    getThemeMethod.setAccessible(true);
    Log.d("Test", "" + getThemeMethod.invoke(this)); // Always returns 0

    PackageInfo packageInfo = getPackageManager().getPackageInfo(getPackageName(), PackageManager.GET_META_DATA);
    Log.d("Test", getResources().getResourceEntryName(packageInfo.applicationInfo.theme)); // Returns 'Theme.DeviceDefault'
} catch (Exception e) {
    Log.d("Test", "exception", e);
}

Upvotes: 14

Views: 8017

Answers (2)

Sahil Doshi
Sahil Doshi

Reputation: 356

int currentNightMode = getContext().getResources().getConfiguration().uiMode & Configuration.UI_MODE_NIGHT_MASK;  
switch (currentNightMode) {
    case Configuration.UI_MODE_NIGHT_NO:
        // Night mode is not active on device
        break;
    case Configuration.UI_MODE_NIGHT_YES:
        // Night mode is active on device
        break;
}

Upvotes: 21

Shubham Sharma
Shubham Sharma

Reputation: 315

This might help ContextThemeWrapper

Upvotes: 1

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