Android Settings中显示自定义dialog

第一种方法，参照NightDisplaySettings.java

@Override
    public boolean onPreferenceTreeClick(Preference preference) {
        if (preference == mStartTimePreference) {
            showDialog(DIALOG_START_TIME);
            return true;
        return super.onPreferenceTreeClick(preference);
    }

    @Override
    public Dialog onCreateDialog(final int dialogId) {
        if (dialogId == DIALOG_START_TIME || dialogId == DIALOG_END_TIME) {

            final Context context = getContext();
            final boolean use24HourFormat = android.text.format.DateFormat.is24HourFormat(context);
            
            TextView ledValueText;
            SeekBar ledSeekBar;
            View view = LayoutInflater.from(context).inflate(R.layout.led_brightness_setting_dialog, null);
            AlertDialog builder = new AlertDialog.Builder(context)
                    .setTitle("LED brightness setting")
                    .setView(view)
                    .create();
           //builder.getWindow().setContentView(R.layout.led_brightness_setting_dialog);

            ledValueText = (TextView) view.findViewById(R.id.led_setting_text);
            ledSeekBar = (SeekBar) view.findViewById(R.id.led_setting_seekbar);
            ledSeekBar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
                @Override
                public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {

                }

                @Override
                public void onStartTrackingTouch(SeekBar seekBar) {

                }

                @Override
                public void onStopTrackingTouch(SeekBar seekBar) {

                }
            });

            return builder;
        }
        return super.onCreateDialog(dialogId);
    }

android8.1中继承SettingsPreferenceFragment并在类中创建dialog的时候，遇到SettingsDialogFragmentjava.lang.IllegalStateException: Dialog must provide a metrics category异常。

需要override  getDialogMetricsCategory，比如：

@Override
    public int getDialogMetricsCategory(int dialogId) {
        switch (dialogId) {
            case DIALOG_START_TIME:
                return MetricsEvent.DIALOG_NIGHT_DISPLAY_SET_START_TIME;
            case DIALOG_END_TIME:
                return MetricsEvent.DIALOG_NIGHT_DISPLAY_SET_END_TIME;
            default:
                return 0;
        }
    }