android-preferences

问题 I'm currently trying to make a settings menu, that will show a MultiSelectListPreference , to select multiple contacts from your contact list. At this moment, I'm receiving an NullPointerException , when i try to MultiSelectListPreference#setEntryValue(CharSequence[]) If I put the setEntries first, that one throws the same exception. I've put a breakpoint, to see step by step what happens. The variables are filled because they store Strings , they can contain a String "null", so I guess that

问题 I'm currently trying to make a settings menu, that will show a MultiSelectListPreference , to select multiple contacts from your contact list. At this moment, I'm receiving an NullPointerException , when i try to MultiSelectListPreference#setEntryValue(CharSequence[]) If I put the setEntries first, that one throws the same exception. I've put a breakpoint, to see step by step what happens. The variables are filled because they store Strings , they can contain a String "null", so I guess that

问题 My PreferenceActivity looks like: import android.os.Build; import android.os.Bundle; import android.preference.PreferenceActivity; import android.preference.PreferenceFragment; import android.widget.TextView; public class Settings extends PreferenceActivity { @SuppressWarnings("deprecation") @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); //setContentView(R.layout.about); Typeface timesFont = Typeface.createFromAsset(getAssets(), "fonts/times

问题 My PreferenceActivity looks like: import android.os.Build; import android.os.Bundle; import android.preference.PreferenceActivity; import android.preference.PreferenceFragment; import android.widget.TextView; public class Settings extends PreferenceActivity { @SuppressWarnings("deprecation") @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); //setContentView(R.layout.about); Typeface timesFont = Typeface.createFromAsset(getAssets(), "fonts/times

问题 I have sounds in my /raw folder and I would like my user to be able to choose one sound in preferences exactly like RingtonePreference does but only with my sounds. 回答1: Here my RingtonePreference replacement. All system ringtones and your custom ringtones (defined in xml, stored in res/raw) are listed: ExtraRingtonePreference.java package de.almisoft.test; import java.util.Arrays; import java.util.LinkedHashMap; import java.util.Map; import java.util.TreeMap; import de.almisoft.test.R;

问题 I'm trying to use the new Preference v14 Support library. To give the preferences a material style, I use the following style on my Activity: <style name="PreferenceTheme" parent="@style/Theme.AppCompat.Light.DarkActionBar"> <item name="preferenceTheme">@style/PreferenceThemeOverlay.v14.Material</item> </style> That works fine. My problem is that when I add new Preferences at runtime, they get inflated using an old theme. Here's a screenshot of the result: As you can see, the first preference

问题 Hi I have an Android app that already uses a Navigation Drawer. My MainActivity extends Fragment Activity and my SettingFragment extends PreferenceFragment Settings Fragment : public class SettingsFragment extends PreferenceFragment { public SettingsFragment() {} @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); // Load the preferences from an XML resource addPreferencesFromResource(R.xml.prefs); } } and my MainActivity : PreferenceFragment

问题 I've got a DialogPreference which implements a simple TimePicker.OnTimeChangedListener (see below). Setting the time by clicking the +/- buttons works great. But I don't know how to save the state of the timepicker when the user typed in the time directly into the textfield. It could be sufficient to access to the current textfield value, so I'd be able to persist it in onDialogClosed. But timePicker.getCurrentHour() won't do it. Please help... public class TimePreference extends

问题 I saw in a lot of places that it's a problem to copy the SharedPreferences file to the sd card because every manufacturer place it somewhere else. I want to backup on the sd card no matter where is the file located. Is there any way to do this? 回答1: The SharedPreferences interface contains a method called getAll() which returns a map with the key-value pairs. So instead of copying the file itself, I just serialize the map that being returned from this method and then retrieve it back

问题 I've been having some trouble getting some custom DialogPreference subclasses inside a PreferenceFragment to remain visible when the screen is rotated. I don't experience this problem when using a PreferenceActivity, so I don't know whether it's an Android bug or a problem with my code, but I'd like someone to confirm whether they are having the same experience. To test this, first create a preference screen containing at least one DialogPreference (it doesn't matter which subclass). Then