当我查看从 get all 返回的地图时,我只能看到之前设置为 hashmap 的值,并且无法转换为 EditTextPreference。
它看起来像 getAll() 正在获取首选项哈希,但不是来自 XML 的类型
我想要做的是将摘要设置为对值的偏好。
public static class Prefs1Fragment extends PreferenceFragment {
SharedPreferences sharedPreferences;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// Load the preferences from an XML resource
addPreferencesFromResource(R.xml.initial_preferences);
}
@Override
public void onResume() {
super.onResume();
sharedPreferences = PreferenceManager.getDefaultSharedPreferences(getActivity());
Map<String, ?> preferencesMap = sharedPreferences.getAll();
String appId = sharedPreferences.getString(PabuloConstants.InternalAppIdPerfName, "N/A");
// iterate through the preference entries and update their summary if they are an instance of EditTextPreference
for (Map.Entry<String, ?> preferenceEntry : preferencesMap.entrySet()) {
if(preferenceEntry instanceof EditTextPreference){
Log.d("","found instance");
}
}
}
}
XML:
<PreferenceCategory
android:title="Category Title">
<EditTextPreference
android:key="app_id_preference"
android:title="some title"
android:summary="some summary"
/>
<EditTextPreference
android:key="app_id_preference2"
android:title="some title"
android:summary="some summary"
/>
<EditTextPreference
android:key="app_id_preference3"
android:title="some title"
android:summary="some summary"
/>
</PreferenceCategory>