如何在偏好活动中识别偏好

Question

I have a ListPreference that is called by an Intent :

package com.timeofcubeeliteDYLANFERRIS.cubetimerelite;

import android.os.Bundle;

public class MainPreferenceActivity extends PreferenceActivity {

    private OnPreferenceChangeListener onPreferenceChangeListener = new
        OnPreferenceChangeListener() {
        public boolean onPreferenceChange(Preference arg0, Object arg1){
                return true;
        }
    };

    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        addPreferencesFromResource(R.xml.main_settings);
        Preference p;
        p.setOnPreferenceChangeListener(onPreferenceChangeListener);
    }
}

The Preference p; is what I'm concerned about. I have the other stuff of finding when it changes, but I don't know how to actually identify the Preference . The Preference is located in xml.main_settings.xml . Its key is timerIncrement . Could anyone help me with this?

Summary:
I do not know how to define a Preference located in an XML file.

Answer 1

您只需使用findPreference(CharSequence key)即可检索Preference 。

Answer 2

As you are extending with Preference Activity you directly have findPreference(CharSequence key) method to get your preference from your xml file.

So you can define Preference as

Preference p = (Preference)findPreference(keyofpreferenceitemyouhavetaken);

If it is a EditTextPreference then it would be:

EditTextPreference p = (EditTextPreference)findPreference(keyofpreferenceitemyouhavetaken);

Answer 3

Use the below two lines which solves your problem.

PreferenceManager.getDefaultSharedPreferences("sPEICFY YOUR XML LOCATION HERE");
Prefs.registerOnSharedPreferenceChangeListener(this);