第一種方法，參照NightDisplaySettings.java

@Overridepublic boolean onPreferenceTreeClick(Preference preference) {if (preference == mStartTimePreference) {showDialog(DIALOG_START_TIME);return true;return super.onPreferenceTreeClick(preference);}@Overridepublic 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() {@Overridepublic void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {}@Overridepublic void onStartTrackingTouch(SeekBar seekBar) {}@Overridepublic void onStopTrackingTouch(SeekBar seekBar) {}});return builder;}return super.onCreateDialog(dialogId);}

android8.1中繼承SettingsPreferenceFragment并在類中創建dialog的時候，遇到SettingsDialogFragmentjava.lang.IllegalStateException: Dialog must provide a metrics category異常。

需要override??getDialogMetricsCategory，比如：

@Overridepublic 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;}}

?

轉載于:https://www.cnblogs.com/kunkka/p/10605752.html

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