android - 使用用户首选项复选框在状态栏上进行通知

Question

如何使用用户首选项和复选框显示正在进行的通知？我想显示 MainActiviy 中的电池电量：

        private BroadcastReceiver batteryInfoReceiver = new BroadcastReceiver() {

        @Override
        public void onReceive(Context context, Intent intent) {         

            int level= intent.getIntExtra(BatteryManager.EXTRA_LEVEL,-1);
                     . . .

            String[] statusbatt = {
                "Battery level: " +level+"%",
                . . .};
            ListView lvStatus = (ListView) findViewById(R.id.lv_status);
            lvStatus.setAdapter(new ArrayAdapter<String>(MainActivity.this, R.layout.list, statusbatt));
            info.getListViewSize(lvStatus);      
          }
};

设置首选项：

public class Settings extends SettingsActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    addPreferencesFromResource(R.xml.settings);

    final CheckBoxPreference checkboxPref = (CheckBoxPreference) getPreferenceManager()
            .findPreference("Checkbox");
   ////// here the check box code for notfication
   }
}

如您所见，我不知道该怎么做。有什么帮助吗？settings.xml 中的复选框：

<CheckBoxPreference
        android:defaultValue="true"
        android:key="first"
        android:summary="@string/summary_show"
        android:title="@string/Show_notifications" />