Preference Activity on Preference Click Listener

Question

I am building a Preference Activity where most of the preferences in the list will be executing code and not modifying a SharedPreference directly. My preferences.xml file l

Answer 1

Maybe this could not be useful for OP, but could be useful for someone else. I'd like to write a sort of summary; in general, you can follow mainly three ways: 1) you can find your preference somewhere in your code with

Preference examplePreference = findPreference(KEY_EXAMPLE_PREFERENCE);

and then you can add a click listener and override its on click method with

examplePreference.setOnPreferenceClickListener(new Preference.OnPreferenceClickListener() {
    @Override
    public boolean onPreferenceClick(Preference preference) {
        // handle click here
    }
});

This has to be done for every preference whose clicks you want to listen to 2) You can implement Preference.OnPreferenceClickListener interface in your settings fragment/activity and override onPreferenceClick just once, by using a switch construct or a if-else if-else if-... construct and merging all the single handlings; it should be something like:

@Override
public boolean onPreferenceClick(Preference preference) {
    switch (preference.getKey()) {
        case KEY_EXAMPLE_PREFERENCE: {
            // handle click here
        }
        break;
        case ...
    }
}

Then, you still have to find each preference but you can simply call on each of them

setOnPreferenceClickListener(this);

(I think the OP's implementation didn't work (his method wasn't called) because of this last part) we pass "this" as parameter because we implemented the click listener interface

3) (which I think is the easiest) you can override

onPreferenceTreeClick(PreferenceScreen preferenceScreen, Preference preference)

in your preference fragment/activity without implementing any other interface and there you can copy the switch of the if-else if-... construct of option 2); the main advantage in that you shouldn't need to find each preference and to call on them setOnPreferenceClickListener.

Hope this will be useful for someone!

Answer 2

Your Preference object wont get null if you will find followings (copypasting from the project):

public class ImePreferences extends PreferenceActivity {

.....

@Override
protected boolean isValidFragment(String fragmentName) {
    return Settings.class.getName().equals(fragmentName);
}

.....

public static class Settings extends InputMethodSettingsFragment {

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setInputMethodSettingsCategoryTitle(R.string.language_selection_title);
        setSubtypeEnablerTitle(R.string.select_language);

        // Load the preferences from an XML resource
        addPreferencesFromResource(R.xml.ime_preferences);
        Preference pLcl = getPreferenceScreen().findPreference(getResources().getString(
                R.string.dictionary_button));
        pLcl.setOnPreferenceClickListener(new Preference.OnPreferenceClickListener() {
            @Override
            public boolean onPreferenceClick(Preference preference) {
                // handle click here
                l.a("this is the click");
                return true;
            }
        });
        if(pLcl != null)
            l.a(6576);
    }
}

.....

}

Answer 3

Implement OnPreferenceClickListener and in the onPreferenceClick

@Override
public boolean onPreferenceClick (Preference preference)
{
    String key = preference.getKey();
    // do what ever you want with this key
}

Answer 4

Just override:

@Override
public boolean onPreferenceTreeClick(PreferenceScreen preferenceScreen, Preference preference) {

    String key = preference.getKey();
    ...

    return super.onPreferenceTreeClick(preferenceScreen, preference);
}

Answer 5

For Androidx in Feb 2020

Others answers were not worked in Androidx for me. I implemented Settings from Android Developers guides

See below guide for implementing click listener

1) Implement PreferenceManager.OnPreferenceTreeClickListener in your settings fragment, like below code

import androidx.preference.PreferenceManager;

class SettingsFragment extends PreferenceFragmentCompat implements PreferenceManager.OnPreferenceTreeClickListener {

2) Override onPreferenceTreeClick inside your SettingsFragment

@Override
public boolean onPreferenceTreeClick(Preference preference) {        
    String key = preference.getKey();

        switch (key) {
            case "key1":
                return true;

            case "key2":
                return true;

            //codes    
        }
}

Answer 6

You could also find the preference and set the click listener.

Preference connectToNewComputer= findPreference("connectToNewComputer");
connectToNewComputer.setOnPreferenceClickListener(this);