相关疑难解决方法(0)

我想获取用于在我的PreferenceActivity中显示特定首选项的View实例,因此我可以修改其属性,例如:

public class SettingsActivity extends PreferenceActivity {

    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        addPreferencesFromResource(R.xml.preference);
        Preference pref = findPreference("key");
        pref.getView().setVisibility(View.GONE);
            //not necessarily setVisibility, i hope you get my point
    }
}

我只找到了这个方法: getView(View convertView,ViewGroup parent).但是对我来说似乎很困惑,如果我想获得我的偏好视图,我需要提供视图和viewGroup作为参数？

有人可以解释如何使用此方法,或指向另一种方法从我的Preference实例获取View.

PS:如果可能的话,我宁愿不扩展Preference类,但如果有必要,我不介意

我想在Activity托管的PreferenceFragment中使用Snackbar onSharedPreferenceChange().

preference.xml

    <?xml version="1.0" encoding="utf-8"?>
<PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android"
    android:key="ll_main">
<PreferenceCategory android:title="@string/push_notification">
    <SwitchPreference android:title="@string/transectional_notification"
        android:key="trans_not"
        android:defaultValue="true"
        android:summary="@string/get_notified_about_any_changes_related_to_your_transections"/>
    <SwitchPreference android:title="@string/promotional_notification"
        android:key="prom_not"
        android:defaultValue="true"
        android:summary="@string/get_notified_about_referalls"/>
</PreferenceCategory>
    <PreferenceCategory android:title="@string/other_notifications">
        <SwitchPreference android:title="@string/email_notifications"
            android:defaultValue="true"
            android:key="email_not" />
        <SwitchPreference android:title="@string/sms_notifications"
            android:defaultValue="true"
            android:key="sms_not"/>
    </PreferenceCategory>
<PreferenceCategory android:title="@string/recommendation_setting">
    <com.til.recharger.widgets.PhoneEditTextPreference
        android:title="@string/mobile_no"
        android:inputType="number"
        android:summary="8587035342"
        android:key="mob_no_edit"/>
    <ListPreference android:title="@string/operator"
        android:summary="Airtel"
        android:key="operator_list"/>
    <ListPreference android:title="@string/circle"
        android:summary="New Delhi"
        android:key="circle_list"/>
    <ListPreference
        android:title="Plan type"
        android:entries="@array/listentries"
        android:entryValues="@array/listentries"
        android:summary="Postpaid"
        android:defaultValue="Prepaid"
        android:key="plan_key"/>
</PreferenceCategory>
<PreferenceCategory android:title="@string/plan_info">
    <com.til.recharger.widgets.NumberPickerPreference
        android:title="@string/bill_cycle"
        android:summary="2"
        android:persistent="true"
        android:key="bill_cycle_edit"/>
    <com.til.recharger.widgets.CustomEditTextPreference
        android:title="@string/monthly_data_limit"
        android:summary="%s"
        android:inputType="number"
        android:key="monthly_limit_edit"/>
    <ListPreference
        android:title="@string/preffered_network_type"
        android:entries="@array/mobiledataoptions"
        android:entryValues="@array/mobiledatavalues"
        android:summary="3G"
        android:defaultValue="3G"
        android:key="pref_data_list"/>
</PreferenceCategory>
</PreferenceScreen> …