android.app.UiModeManager#MODE_NIGHT_NO源码实例Demo

@Override
protected void onResume() {
    Log.d(AnotherRSS.TAG, "onResume");
    AnotherRSS.withGui = true;
    new DbExpunge().execute();

    boolean night = mPreferences.getBoolean("nightmode_use", false);
    if (night) {
        int startH = mPreferences.getInt("nightmode_use_start", AnotherRSS.Config.DEFAULT_NIGHT_START);
        int stopH = mPreferences.getInt("nightmode_use_stop", AnotherRSS.Config.DEFAULT_NIGHT_STOP);
        if (AnotherRSS.inTimeSpan(startH, stopH) && umm.getNightMode() != UiModeManager.MODE_NIGHT_YES) {
            umm.setNightMode(UiModeManager.MODE_NIGHT_YES);
            AppCompatDelegate.setDefaultNightMode(AppCompatDelegate.MODE_NIGHT_YES);
        }
        if (!AnotherRSS.inTimeSpan(startH, stopH) && umm.getNightMode() != UiModeManager.MODE_NIGHT_NO) {
            umm.setNightMode(UiModeManager.MODE_NIGHT_NO);
            AppCompatDelegate.setDefaultNightMode(AppCompatDelegate.MODE_NIGHT_NO);
        }
    } else {
        if (umm.getNightMode() == UiModeManager.MODE_NIGHT_YES) {
            umm.setNightMode(UiModeManager.MODE_NIGHT_NO);
            AppCompatDelegate.setDefaultNightMode(AppCompatDelegate.MODE_NIGHT_NO);
        }
    }
    super.onResume();
}
 

@Override
public void setNightMode(int mode) {
    if (isNightModeLocked() &&  (getContext().checkCallingOrSelfPermission(
            android.Manifest.permission.MODIFY_DAY_NIGHT_MODE)
            != PackageManager.PERMISSION_GRANTED)) {
        Slog.e(TAG,
                "Night mode locked, requires MODIFY_DAY_NIGHT_MODE permission");
        return;
    }
    switch (mode) {
        case UiModeManager.MODE_NIGHT_NO:
        case UiModeManager.MODE_NIGHT_YES:
        case UiModeManager.MODE_NIGHT_AUTO:
            break;
        default:
            throw new IllegalArgumentException("Unknown mode: " + mode);
    }

    final long ident = Binder.clearCallingIdentity();
    try {
        synchronized (mLock) {
            if (mNightMode != mode) {
                Settings.Secure.putInt(getContext().getContentResolver(),
                        Settings.Secure.UI_NIGHT_MODE, mode);
                mNightMode = mode;
                updateLocked(0, 0);
            }
        }
    } finally {
        Binder.restoreCallingIdentity(ident);
    }
}
 

private static String nightModeToStr(int mode) {
    switch (mode) {
        case UiModeManager.MODE_NIGHT_YES:
            return NIGHT_MODE_STR_YES;
        case UiModeManager.MODE_NIGHT_NO:
            return NIGHT_MODE_STR_NO;
        case UiModeManager.MODE_NIGHT_AUTO:
            return NIGHT_MODE_STR_AUTO;
        default:
            return NIGHT_MODE_STR_UNKNOWN;
    }
}
 

private static int strToNightMode(String modeStr) {
    switch (modeStr) {
        case NIGHT_MODE_STR_YES:
            return UiModeManager.MODE_NIGHT_YES;
        case NIGHT_MODE_STR_NO:
            return UiModeManager.MODE_NIGHT_NO;
        case NIGHT_MODE_STR_AUTO:
            return UiModeManager.MODE_NIGHT_AUTO;
        default:
            return -1;
    }
}