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”：

 

 

 

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;    }        @Override    protected View onCreateView(ViewGroup parent){    	Log.v(TAG, "onCreateView()");        return super.onCreateView(parent);    }        @Override    public 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);          }    }        @Override    public 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 value        if(!callChangeListener(newValue)){            seekBar.setProgress(mCurrentValue - mMinValue);             return;         }        // change accepted, store it        mCurrentValue = newValue;        if( null != mCurrentValueText ){        	mCurrentValueText.setText(String.valueOf(newValue));        }        persistInt(newValue);    }    @Override    public void onStartTrackingTouch(SeekBar seekBar) {}    @Override    public void onStopTrackingTouch(SeekBar seekBar) {        notifyChanged();    }    @Override     protected Object onGetDefaultValue(TypedArray ta, int index){                int defaultValue = ta.getInt(index, DEFAULT_VALUE);        return defaultValue;            }    @Override    protected 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