参考网上代码自己做了一个客户定制 Preference，没有使用 preference的 android:layout 属性，因为总觉得在不同版本系统上难以和其他preference的控件对齐，所以采用仅设置 android:widget_layout 的方式。

先创建自己要定制的 widget_layout 文件“preference_widget_seekbar.xml”：

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"android:layout_width="wrap_content"android:layout_height="wrap_content"android:gravity="center_vertical"android:minHeight="?android:attr/listPreferredItemHeight"android:paddingRight="?android:attr/scrollbarSize" ><SeekBarandroid:id="@+id/seekBar1"android:layout_width="wrap_content"android:layout_height="wrap_content"android:max="60"android:minWidth="240dip"android:paddingRight="5dp"android:progress="20"android:textIsSelectable="true" ></SeekBar><TextViewandroid:id="@+id/seekBarPrefValue"android:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_below="@id/seekBar1"android:layout_centerHorizontal="true"android:textIsSelectable="true" ></TextView><TextViewandroid:id="@+id/seekBarPrefUnitsLeft"android:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_below="@id/seekBar1"android:layout_toLeftOf="@id/seekBarPrefValue"android:textIsSelectable="true" ></TextView><TextViewandroid:id="@+id/seekBarPrefUnitsRight"android:layout_width="wrap_content"android:layout_height="wrap_content"android:textIsSelectable="true"android:layout_below="@id/seekBar1" android:layout_toRightOf="@id/seekBarPrefValue" ></TextView></RelativeLayout>

建立 com.sample.preference.SeekBarPreference 类，用来初始化界面，同步音量滑块表示的preference数据

package com.sample.preference;import com.sample.R;

import android.content.Context;
import android.content.res.TypedArray;
import android.preference.Preference;
import android.util.AttributeSet;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.view.ViewParent;
import android.widget.RelativeLayout;
import android.widget.SeekBar;
import android.widget.SeekBar.OnSeekBarChangeListener;
import android.widget.TextView;public class SeekBarPreference extends Preference 
implements OnSeekBarChangeListener
{private final String TAG = "SeekBarPreference";//private static final String ANDROIDNS="http://schemas.android.com/apk/res/android";private static final String SEEKBAR_PREFS="SeekBarPreference";private static final int DEFAULT_VALUE = 50;Context mContext;private int mMaxValue      = 100;private int mMinValue      = 0;private int mInterval      = 1;private int mCurrentValue  = 50;private String mUnitsLeft  = "";private String mUnitsRight = "";private SeekBar mSeekBar;private TextView mCurrentValueText;public SeekBarPreference(Context context, AttributeSet attrs) {super(context, attrs);initPreference(context, attrs);}public SeekBarPreference(Context context, AttributeSet attrs, int defStyle) {super(context, attrs, defStyle);initPreference(context, attrs);}private void initPreference(Context context, AttributeSet attrs) {Log.v(TAG,"initPreference");mContext = context;updateValuesFromXml(attrs);this.setWidgetLayoutResource(R.layout.preference_widget_seekbar);}private void updateValuesFromXml(AttributeSet attrs) {mMaxValue = attrs.getAttributeIntValue(SEEKBAR_PREFS, "max", 100);mMinValue = attrs.getAttributeIntValue(SEEKBAR_PREFS, "min", 0);mUnitsLeft = getAttributeStringValue(attrs, SEEKBAR_PREFS, "unitsLeft", "");String value = getAttributeStringValue(attrs, SEEKBAR_PREFS, "value", "");mUnitsRight = getAttributeStringValue(attrs, SEEKBAR_PREFS, "unitsRight", "");try {mInterval = attrs.getAttributeIntValue(SEEKBAR_PREFS, "interval", 1);if( mInterval <= 0 ){mInterval = 1;}}catch(Exception e) {Log.e(TAG, "Invalid interval value", e);}}private String getAttributeStringValue(AttributeSet attrs, String namespace, String name, String defaultValue) {String value = attrs.getAttributeValue(namespace, name);if(value == null)value = defaultValue;return value;}@Overrideprotected View onCreateView(ViewGroup parent){Log.v(TAG, "onCreateView()");return super.onCreateView(parent);}@Overridepublic void onBindView(View view) {super.onBindView(view);View layout = view;Log.v(TAG, "onBindView()");mSeekBar = (SeekBar)view.findViewById(R.id.seekBar1);mCurrentValueText = (TextView)view.findViewById(R.id.seekBarPrefValue);if( null != mCurrentValueText ){mCurrentValueText.setText(String.valueOf(mCurrentValue));mCurrentValueText.setMinimumWidth(30);}if( null != mSeekBar ){mSeekBar.setMax(mMaxValue - mMinValue);mSeekBar.setProgress(mCurrentValue - mMinValue);mSeekBar.setOnSeekBarChangeListener(this);}TextView unitsRight = (TextView)view.findViewById(R.id.seekBarPrefUnitsRight);if( null != unitsRight ){unitsRight.setText(mUnitsRight);}TextView unitsLeft = (TextView)view.findViewById(R.id.seekBarPrefUnitsLeft);if( null != unitsLeft ){unitsLeft.setText(mUnitsLeft);  }}@Overridepublic void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {int newValue = progress + mMinValue;if(newValue > mMaxValue)newValue = mMaxValue;else if(newValue < mMinValue)newValue = mMinValue;else if(mInterval != 1 && newValue % mInterval != 0)newValue = Math.round(((float)newValue)/mInterval)*mInterval;  // change rejected, revert to the previous valueif(!callChangeListener(newValue)){seekBar.setProgress(mCurrentValue - mMinValue); return; }// change accepted, store itmCurrentValue = newValue;if( null != mCurrentValueText ){mCurrentValueText.setText(String.valueOf(newValue));}persistInt(newValue);}@Overridepublic void onStartTrackingTouch(SeekBar seekBar) {}@Overridepublic void onStopTrackingTouch(SeekBar seekBar) {notifyChanged();}@Override protected Object onGetDefaultValue(TypedArray ta, int index){int defaultValue = ta.getInt(index, DEFAULT_VALUE);return defaultValue;}@Overrideprotected void onSetInitialValue(boolean restoreValue, Object defaultValue) {if(restoreValue) {mCurrentValue = getPersistedInt(mCurrentValue);}else {int temp = 0;try {temp = (Integer)defaultValue;}catch(Exception ex) {Log.e(TAG, "Invalid default value: " + defaultValue.toString());}persistInt(temp);mCurrentValue = temp;}}} 

最后，在preference xml中加入对应项

<?xml version="1.0" encoding="utf-8"?>
<PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android"android:title="audioSetting"><!-- ... 其他 preference 项 --><com.sample.preference.SeekBarPreferenceandroid:key="key_nes_volume_option" android:title="volumeSetting" android:summary="volumeSettingSummary" />	

	<!-- ... 其他 preference 项 -->	

</PreferenceScreen>