FYI:

findPreference(CharSequence key)
This method was deprecated in API level 11. This function is not relevant
for a modern fragment-based PreferenceActivity.

更有理由看看上面@ASD的非常圆滑的答案(来源在这里找到)，它说在android:summary中对preferences.xml中的每个字段使用%s。(首选项的当前值替换为%s。)

<ListPreference
 ...        
 android:summary="Length of longest word to return as match is %s"
 ...
 />

简洁的解决方案只需一行代码:

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    addPreferencesFromResource(R.xml.preferences);

    bindPreferenceSummaryToValue(findPreference("mySetting"));

    // initialize summary
    sBindPreferenceSummaryToValueListener.onPreferenceChange(findPreference("mySetting"), 
        ((ListPreference) findPreference("mySetting")).getEntry());
}

我的解决方案是创建一个自定义的EditTextPreference，像这样在XML中使用:EditTextPreference android:title="示例title " />

EditTextPreference.java: -

package com.example;

import android.content.Context;
import android.util.AttributeSet;

public class EditTextPreference extends android.preference.EditTextPreference
{
    public EditTextPreference(Context context, AttributeSet attrs, int defStyle)
    {
        super(context, attrs, defStyle);
    }

    public EditTextPreference(Context context, AttributeSet attrs)
    {
        super(context, attrs);
    }

    public EditTextPreference(Context context)
    {
        super(context, null);
    }

    @Override
    protected void onDialogClosed(boolean positiveResult)
    {
        super.onDialogClosed(positiveResult);

        setSummary(getSummary());
    }

    @Override
    public CharSequence getSummary()
    {
        return getText();
    }
}

我解决了这个问题与以下后代的ListPreference:

public class EnumPreference extends ListPreference {

    public EnumPreference(Context aContext, AttributeSet attrs) {
        super(aContext,attrs);
    }

    @Override
    protected View onCreateView(ViewGroup parent) {
        setSummary(getEntry());
        return super.onCreateView(parent);
    }

    @Override
    protected boolean persistString(String aNewValue) {
        if (super.persistString(aNewValue)) {
            setSummary(getEntry());
            notifyChanged();
            return true;
        } else {
            return false;
        }
    }
}

从1.6到4.0.4，我似乎工作得很好。

这是我的解决方案……就其价值而言

package com.example.PrefTest;

import android.content.SharedPreferences;
import android.content.SharedPreferences.OnSharedPreferenceChangeListener;
import android.os.Bundle;
import android.preference.EditTextPreference;
import android.preference.ListPreference;
import android.preference.Preference;
import android.preference.PreferenceActivity;
import android.preference.PreferenceGroup;
import android.preference.PreferenceManager;

public class Preferences extends PreferenceActivity implements
        OnSharedPreferenceChangeListener {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        addPreferencesFromResource(R.xml.preferences);
        PreferenceManager.setDefaultValues(Preferences.this, R.xml.preferences,
            false);
        initSummary(getPreferenceScreen());
    }

    @Override
    protected void onResume() {
        super.onResume();
        // Set up a listener whenever a key changes
        getPreferenceScreen().getSharedPreferences()
                .registerOnSharedPreferenceChangeListener(this);
    }

    @Override
    protected void onPause() {
        super.onPause();
        // Unregister the listener whenever a key changes
        getPreferenceScreen().getSharedPreferences()
                .unregisterOnSharedPreferenceChangeListener(this);
    }

    public void onSharedPreferenceChanged(SharedPreferences sharedPreferences,
            String key) {
        updatePrefSummary(findPreference(key));
    }

    private void initSummary(Preference p) {
        if (p instanceof PreferenceGroup) {
            PreferenceGroup pGrp = (PreferenceGroup) p;
            for (int i = 0; i < pGrp.getPreferenceCount(); i++) {
                initSummary(pGrp.getPreference(i));
            }
        } else {
            updatePrefSummary(p);
        }
    }

    private void updatePrefSummary(Preference p) {
        if (p instanceof ListPreference) {
            ListPreference listPref = (ListPreference) p;
            p.setSummary(listPref.getEntry());
        }
        if (p instanceof EditTextPreference) {
            EditTextPreference editTextPref = (EditTextPreference) p;
            if (p.getTitle().toString().toLowerCase().contains("password"))
            {
                p.setSummary("******");
            } else {
                p.setSummary(editTextPref.getText());
            }
        }
        if (p instanceof MultiSelectListPreference) {
            EditTextPreference editTextPref = (EditTextPreference) p;
            p.setSummary(editTextPref.getText());
        }
    }
}

只需将这一行添加到xml规范中。 应用:useSimpleSummaryProvider = " true "

例如:

< your.package.name.MyListPreference

android:key="noteInterval"
android:defaultValue="60"
android:title="Notification Interval"
android:entries="@array/noteInterval"
android:entryValues="@array/noteIntervalValues"
app:useSimpleSummaryProvider="true"

/>