In my app i have a SettingsFragment that extends PreferenceFragmentCompat.
In this settings i have a ListPreference generated dynamically with an HTTP call that receive a JSON of values.
Now the problem is that from MainActivity when i get value stored into SharedPreference i get the android.entries but i didn't find a way to get the entryValues.
I see that i can get entry with getEntry() method from SettingsFragment:
ListPreference listPreference = (ListPreference)
findPreference("entry_preference");
String entry = listPreference.getEntry();
But this only works in the SettingsFragment.... how can i get the selected entry instead of entryValues from MainActivity?
sharedPref = PreferenceManager.getDefaultSharedPreferences(this);
//This will return the value, but i need the entry text
String entry_settings = sharedPref.getString("entry_preference", "-1");
That code will return -1, but i need No Entry:
<?xml version="1.0" encoding="utf-8"?>
<resources>
<!-- dynamically generated by reading values from server -->
<string-array name="entry_names_array">
<item>No Entry</item>
</string-array>
<!-- dynamically generated by reading values from server -->
<string-array name="entry_values_array">
<item>-1</item>
</string-array>
</resources>
How can i get this value into MainActivity, or more generally how get this value into Activity/Fragment that doens't extend PreferenceFragmentCompat or PrefereceActivity
EDIT
I see that from MainActivity the sharedPref object have 2 keys:
SharedPreference sharedPref = PreferenceManager.getDefaultSharedPreferences(this);
It's contain the key entry_preference that it's the key of the ListPreference:
<ListPreference
android:key="entry_preference"
android:entries="@array/entry_names_array"
android:entryValues="@array/entry_values_array"
android:summary="%s"
android:title="@string/listpref_entry_settings_title" />
And another key "entry", but this key return the same value of "entry_preference".
I write something wrong or it's normal that the key "entry" return the same value of entry_preference?
EDIT 2 - Possible Answer
For now i save the Entry in SharedPreference so i can get it from MainActivity just by reading it. I don't know if it's a good way to do that, but here the code.
1) With a OnSharedPreferenceChangeListener check when user select another choice and store it to SharedPreference
public class SettingsFragment extends PreferenceFragmentCompat {
private static final String TAG = "SettingsFragment";
private SharedPreferences sharedPref;
private SharedPreferences.OnSharedPreferenceChangeListener prefListener;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
sharedPref = PreferenceManager.getDefaultSharedPreferences(getContext());
setEntracesUrl();
requestForEntrancesToServer();
prefListener = new SharedPreferences.OnSharedPreferenceChangeListener() {
public void onSharedPreferenceChanged(SharedPreferences prefs, String key) {
Log.i(TAG, "Settings key changed: " + key);
ListPreference listPreferenceEntrances = (ListPreference) findPreference("entry_preference");
String currentEntry = (String) listPreferenceEntrances.getEntry();
listPreferenceEntrances.setSummary(currentEntry);
//Write the currentEntry into SharedPreferences
SharedPreferences.Editor editor = sharedPref.edit();
editor.putString(getString(R.string.current_listpreference_entry_key), currentEntry);
editor.commit();
}
};
sharedPref.registerOnSharedPreferenceChangeListener(prefListener);
}
}
2) I receive from http request the value that create the ListPreference, so i need to take care about entries, entriesValues and summary
// Code inside method evaluateJSONObject() that evaluate JSON received
//from http request to server that return the values for ListPreference
String currentEntry = (String) listPreferenceEntrances.getEntry();
listPreferenceEntrances.setEntries(entries);
listPreferenceEntrances.setEntryValues(entryValues);
listPreferenceEntrances.setSummary(currentEntry);
//Write the currentEntry into SharedPreferences
SharedPreferences.Editor editor = sharedPref.edit();
editor.putString(getString(R.string.current_listpreference_entry_key), currentEntry);
editor.commit();
3) Finally, in the onCreate of my MainActivity i read sharedPreferences and set the Textview with the entry text:
//SharedPreference instance
sharedPref = PreferenceManager.getDefaultSharedPreferences(this);
setBaseUrl();
// This show the string entry VALUE of selected ListPreference
String entry_settings_id = sharedPref
.getString("entry_preference", "-1");
// This show the string entry of selected ListPreference
String entry_settings_name = sharedPref
.getString(
getString(R.string.current_listpreference_entry_key),
getString(R.string.current_listpreference_entry_default_value));
Let me know if there is a better way to do what i need! Thanks
Until there isn't a better way to do that i will post my answare maybe someone else can us it.
1) With a OnSharedPreferenceChangeListener check when user select another choice and store it to SharedPreference
public class SettingsFragment extends PreferenceFragmentCompat {
private static final String TAG = "SettingsFragment";
private SharedPreferences sharedPref;
private SharedPreferences.OnSharedPreferenceChangeListener prefListener;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
sharedPref = PreferenceManager.getDefaultSharedPreferences(getContext());
setEntracesUrl();
requestForEntrancesToServer();
prefListener = new SharedPreferences.OnSharedPreferenceChangeListener() {
public void onSharedPreferenceChanged(SharedPreferences prefs, String key) {
Log.i(TAG, "Settings key changed: " + key);
//Use a switch or else case that avoid loop call of OnSharedPreferenceChangeListner()
switch(key) {
case "entry_preference":
ListPreference listPreferenceEntrances = (ListPreference) findPreference("entry_preference");
String currentEntry = (String) listPreferenceEntrances.getEntry();
listPreferenceEntrances.setSummary(currentEntry);
//Write the currentEntry into SharedPreferences
SharedPreferences.Editor editor = sharedPref.edit();
editor.putString(getString(R.string.current_listpreference_entry_key), currentEntry);
editor.commit();
break;
default:
break;
}
}
};
sharedPref.registerOnSharedPreferenceChangeListener(prefListener);
}
}
2) I receive from http request the value that create the ListPreference, so i need to take care about entries, entriesValues and summary
// Code inside method evaluateJSONObject() that evaluate JSON received
//from http request to server that return the values for ListPreference
String currentEntry = (String) listPreferenceEntrances.getEntry();
listPreferenceEntrances.setEntries(entries);
listPreferenceEntrances.setEntryValues(entryValues);
listPreferenceEntrances.setSummary(currentEntry);
//Write the currentEntry into SharedPreferences
SharedPreferences.Editor editor = sharedPref.edit();
editor.putString(getString(R.string.current_listpreference_entry_key), currentEntry);
editor.commit();
3) Finally, in the onCreate of my MainActivity i read sharedPreferences and set the Textview with the entry text:
//SharedPreference instance
sharedPref = PreferenceManager.getDefaultSharedPreferences(this);
setBaseUrl();
// This show the string entry VALUE of selected ListPreference
String entry_settings_id = sharedPref
.getString("entry_preference", "-1");
// This show the string entry of selected ListPreference
String entry_settings_name = sharedPref
.getString(
getString(R.string.current_listpreference_entry_key),
getString(R.string.current_listpreference_entry_default_value));