Android SwitchButton(滑动开关)

版本:1.0
日期:2014.5.17  2014.6.1
版权:© 2014 kince 转载注明出处

   在介绍SwitchButton之前,先来看一下系统Button是如何实现的。源码如下:
@RemoteView
public class Button extends TextView {
    public Button(Context context) {
        this(context, null);
    }

    public Button(Context context, AttributeSet attrs) {
        this(context, attrs, com.android.internal.R.attr.buttonStyle);
    }

    public Button(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
    }

    @Override
    public void onInitializeAccessibilityEvent(AccessibilityEvent event) {
        super.onInitializeAccessibilityEvent(event);
        event.setClassName(Button. class.getName());
    }

    @Override
    public void onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo info) {
        super.onInitializeAccessibilityNodeInfo(info);
        info.setClassName(Button. class.getName());
    }
}
  是直接继承于TextView,所不同的是在构造方法中添加了Button的样式,并且在初始化可见性方面交由Button类自己来处理。虽然Button的实现比较简单,但是它的子类并不是这样。看一下:

  直接子类只有有一个,CompoundButton。它是一个抽象类,而实现这个类的控件正是 CheckBox RadioButton Switch ToggleButton 这四个,所以先重点说一下它。源码如下:
  
/**
 * 

* A button with two states, checked and unchecked. When the button is pressed * or clicked, the state changes automatically. *

* *

XML attributes

*

* See {@link android.R.styleable#CompoundButton * CompoundButton Attributes}, {@link android.R.styleable#Button Button * Attributes}, {@link android.R.styleable#TextView TextView Attributes}, {@link * android.R.styleable #View View Attributes} *

*/ public abstract class CompoundButton extends Button implements Checkable { private boolean mChecked ; private int mButtonResource ; private boolean mBroadcasting ; private Drawable mButtonDrawable; private OnCheckedChangeListener mOnCheckedChangeListener; private OnCheckedChangeListener mOnCheckedChangeWidgetListener ; private static final int[] CHECKED_STATE_SET = { R.attr.state_checked }; public CompoundButton(Context context) { this(context, null); } public CompoundButton(Context context, AttributeSet attrs) { this(context, attrs, 0); } public CompoundButton(Context context, AttributeSet attrs, int defStyle) { super(context, attrs, defStyle); TypedArray a = context.obtainStyledAttributes( attrs, com.android.internal.R.styleable.CompoundButton, defStyle, 0); Drawable d = a.getDrawable(com.android.internal.R.styleable.CompoundButton_button); if (d != null ) { setButtonDrawable(d); } boolean checked = a .getBoolean(com.android.internal.R.styleable.CompoundButton_checked, false); setChecked(checked); a.recycle(); } public void toggle() { setChecked(! mChecked); } @Override public boolean performClick() { /* * XXX: These are tiny, need some surrounding 'expanded touch area', * which will need to be implemented in Button if we only override * performClick() */ /* When clicked, toggle the state */ toggle(); return super .performClick(); } @ViewDebug.ExportedProperty public boolean isChecked() { return mChecked ; } /** *

Changes the checked state of this button.

* * @param checked true to check the button, false to uncheck it */ public void setChecked(boolean checked) { if (mChecked != checked) { mChecked = checked; refreshDrawableState(); notifyViewAccessibilityStateChangedIfNeeded( AccessibilityEvent.CONTENT_CHANGE_TYPE_UNDEFINED ); // Avoid infinite recursions if setChecked() is called from a listener if (mBroadcasting ) { return; } mBroadcasting = true ; if (mOnCheckedChangeListener != null) { mOnCheckedChangeListener.onCheckedChanged(this, mChecked); } if (mOnCheckedChangeWidgetListener != null) { mOnCheckedChangeWidgetListener .onCheckedChanged(this, mChecked); } mBroadcasting = false ; } } /** * Register a callback to be invoked when the checked state of this button * changes. * * @param listener the callback to call on checked state change */ public void setOnCheckedChangeListener(OnCheckedChangeListener listener) { mOnCheckedChangeListener = listener; } /** * Register a callback to be invoked when the checked state of this button * changes. This callback is used for internal purpose only. * * @param listener the callback to call on checked state change * @hide */ void setOnCheckedChangeWidgetListener(OnCheckedChangeListener listener) { mOnCheckedChangeWidgetListener = listener; } /** * Interface definition for a callback to be invoked when the checked state * of a compound button changed. */ public static interface OnCheckedChangeListener { /** * Called when the checked state of a compound button has changed. * * @param buttonView The compound button view whose state has changed. * @param isChecked The new checked state of buttonView. */ void onCheckedChanged(CompoundButton buttonView, boolean isChecked); } /** * Set the background to a given Drawable, identified by its resource id. * * @param resid the resource id of the drawable to use as the background */ public void setButtonDrawable(int resid) { if (resid != 0 && resid == mButtonResource ) { return; } mButtonResource = resid; Drawable d = null; if (mButtonResource != 0) { d = getResources().getDrawable(mButtonResource ); } setButtonDrawable(d); } /** * Set the background to a given Drawable * * @param d The Drawable to use as the background */ public void setButtonDrawable(Drawable d) { if (d != null ) { if (mButtonDrawable != null) { mButtonDrawable.setCallback(null); unscheduleDrawable( mButtonDrawable); } d.setCallback( this); d.setVisible(getVisibility() == VISIBLE, false); mButtonDrawable = d; setMinHeight(mButtonDrawable .getIntrinsicHeight()); } refreshDrawableState(); } @Override public void onInitializeAccessibilityEvent(AccessibilityEvent event) { super.onInitializeAccessibilityEvent(event); event.setClassName(CompoundButton.class .getName()); event.setChecked( mChecked); } @Override public void onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo info) { super.onInitializeAccessibilityNodeInfo(info); info.setClassName(CompoundButton.class .getName()); info.setCheckable( true); info.setChecked( mChecked); } @Override public int getCompoundPaddingLeft() { int padding = super.getCompoundPaddingLeft(); if (!isLayoutRtl()) { final Drawable buttonDrawable = mButtonDrawable; if (buttonDrawable != null) { padding += buttonDrawable.getIntrinsicWidth(); } } return padding; } @Override public int getCompoundPaddingRight() { int padding = super.getCompoundPaddingRight(); if (isLayoutRtl()) { final Drawable buttonDrawable = mButtonDrawable; if (buttonDrawable != null) { padding += buttonDrawable.getIntrinsicWidth(); } } return padding; } /** * @hide */ @Override public int getHorizontalOffsetForDrawables() { final Drawable buttonDrawable = mButtonDrawable ; return (buttonDrawable != null) ? buttonDrawable.getIntrinsicWidth() : 0; } @Override protected void onDraw(Canvas canvas) { super.onDraw(canvas); final Drawable buttonDrawable = mButtonDrawable ; if (buttonDrawable != null) { final int verticalGravity = getGravity() & Gravity.VERTICAL_GRAVITY_MASK ; final int drawableHeight = buttonDrawable.getIntrinsicHeight(); final int drawableWidth = buttonDrawable.getIntrinsicWidth(); int top = 0; switch (verticalGravity) { case Gravity.BOTTOM : top = getHeight() - drawableHeight; break; case Gravity.CENTER_VERTICAL : top = (getHeight() - drawableHeight) / 2; break; } int bottom = top + drawableHeight; int left = isLayoutRtl() ? getWidth() - drawableWidth : 0; int right = isLayoutRtl() ? getWidth() : drawableWidth; buttonDrawable.setBounds(left, top, right, bottom); buttonDrawable.draw(canvas); } } @Override protected int[] onCreateDrawableState(int extraSpace) { final int [] drawableState = super.onCreateDrawableState(extraSpace + 1); if (isChecked()) { mergeDrawableStates(drawableState, CHECKED_STATE_SET); } return drawableState; } @Override protected void drawableStateChanged() { super.drawableStateChanged(); if (mButtonDrawable != null) { int[] myDrawableState = getDrawableState(); // Set the state of the Drawable mButtonDrawable.setState(myDrawableState); invalidate(); } } @Override protected boolean verifyDrawable(Drawable who) { return super .verifyDrawable(who) || who == mButtonDrawable; } @Override public void jumpDrawablesToCurrentState() { super.jumpDrawablesToCurrentState(); if (mButtonDrawable != null) mButtonDrawable.jumpToCurrentState(); } static class SavedState extends BaseSavedState { boolean checked ; /** * Constructor called from {@link CompoundButton#onSaveInstanceState()} */ SavedState(Parcelable superState) { super(superState); } /** * Constructor called from {@link #CREATOR} */ private SavedState(Parcel in) { super(in); checked = (Boolean)in.readValue( null); } @Override public void writeToParcel(Parcel out, int flags) { super.writeToParcel(out, flags); out.writeValue( checked); } @Override public String toString() { return "CompoundButton.SavedState{" + Integer.toHexString(System.identityHashCode(this)) + " checked=" + checked + "}" ; } public static final Parcelable.Creator CREATOR = new Parcelable.Creator() { public SavedState createFromParcel(Parcel in) { return new SavedState(in); } public SavedState[] newArray(int size) { return new SavedState[size]; } }; } @Override public Parcelable onSaveInstanceState() { // Force our ancestor class to save its state setFreezesText( true); Parcelable superState = super.onSaveInstanceState(); SavedState ss = new SavedState(superState); ss. checked = isChecked(); return ss; } @Override public void onRestoreInstanceState(Parcelable state) { SavedState ss = (SavedState) state; super.onRestoreInstanceState(ss.getSuperState()); setChecked(ss. checked); requestLayout(); } }
   先从构造方法开始,在构造方法中,
 public CompoundButton(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);

        TypedArray a =
                context.obtainStyledAttributes(
                        attrs, com.android.internal.R.styleable.CompoundButton, defStyle, 0);

        Drawable d = a.getDrawable(com.android.internal.R.styleable.CompoundButton_button);
        if (d != null ) {
            setButtonDrawable(d);
        }

        boolean checked = a
                .getBoolean(com.android.internal.R.styleable.CompoundButton_checked, false);
        setChecked(checked);

        a.recycle();
    }
  
   先是从attrs中读取定义的属性,一个是Drawable用于设置背景;一个是布尔类型变量用于判断是否check过。设置背景使用的是setButtonDrawable()方法,代码如下:
/**
     * Set the background to a given Drawable
     *
     * @param d The Drawable to use as the background
     */
    public void setButtonDrawable(Drawable d) {
        if (d != null ) {
            if (mButtonDrawable != null) {
                mButtonDrawable.setCallback(null);
                unscheduleDrawable( mButtonDrawable);
            }
            d.setCallback( this);
            d.setVisible(getVisibility() == VISIBLE, false);
            mButtonDrawable = d;
            setMinHeight(mButtonDrawable .getIntrinsicHeight());
        }

        refreshDrawableState();
    }
  这个方法写的就比较完善,可以作为一个学习的典范。首先判断传递过来的Drawable是否为空,如果不为空并且默认的Drawable也不为空,那么取消默认Drawable的callback,然后调用 unscheduleDrawable 方法。这个方法代码如下:
 /**
     * Unschedule any events associated with the given Drawable.  This can be
     * used when selecting a new Drawable into a view, so that the previous
     * one is completely unscheduled.
     *
     * @param who The Drawable to unschedule.
     *
     * @see #drawableStateChanged
     */
    public void unscheduleDrawable(Drawable who) {
        if (mAttachInfo != null && who != null) {
            mAttachInfo.mViewRootImpl .mChoreographer.removeCallbacks(
                    Choreographer.CALLBACK_ANIMATION, null, who);
        }
    }
   从方法注释中可以看出它的用途,正是更换Drawable时候使用的。接下来开始重新设置Drawable,包括回调、可见性、最小高度。最后调用 refreshDrawableState() 方法,这个是View类的方法,用于更新Drawable状态。
  然后再回过头看一下 setChecked (checked)方法,这个用于设置check,也就是button的点击状态。代码如下:
/**
     * 

Changes the checked state of this button.

* * @param checked true to check the button, false to uncheck it */ public void setChecked( boolean checked) { if (mChecked != checked) { mChecked = checked; refreshDrawableState(); notifyViewAccessibilityStateChangedIfNeeded( AccessibilityEvent.CONTENT_CHANGE_TYPE_UNDEFINED ); // Avoid infinite recursions if setChecked() is called from a listener if (mBroadcasting ) { return; } mBroadcasting = true ; if (mOnCheckedChangeListener != null) { mOnCheckedChangeListener.onCheckedChanged(this, mChecked); } if (mOnCheckedChangeWidgetListener != null) { mOnCheckedChangeWidgetListener .onCheckedChanged(this, mChecked); } mBroadcasting = false ; } }
  在这个方法中多出了一个接口,这个接口真是check的一个回调接口,代码如下:
/**
     * Interface definition for a callback to be invoked when the checked state
     * of a compound button changed.
     */
    public static interface OnCheckedChangeListener {
        /**
         * Called when the checked state of a compound button has changed.
         *
         * @param buttonView The compound button view whose state has changed.
         * @param isChecked  The new checked state of buttonView.
         */
        void onCheckedChanged(CompoundButton buttonView, boolean isChecked);
    }
  这种回调接口在Android中处处可见,之前的文章也有介绍过。但是在上面的方法,它使用了一个mBroadcasting变量,进而巧妙地避免了重复递归的问题,大家自己感受一下。
  然后就是ondraw()方法了,把之前的drawable画出来。代码如下:
  @Override
    protected void onDraw(Canvas canvas) {
        super.onDraw(canvas);

        final Drawable buttonDrawable = mButtonDrawable ;
        if (buttonDrawable != null) {
            final int verticalGravity = getGravity() & Gravity.VERTICAL_GRAVITY_MASK ;
            final int drawableHeight = buttonDrawable.getIntrinsicHeight();
            final int drawableWidth = buttonDrawable.getIntrinsicWidth();

            int top = 0;
            switch (verticalGravity) {
                case Gravity.BOTTOM :
                    top = getHeight() - drawableHeight;
                    break;
                case Gravity.CENTER_VERTICAL :
                    top = (getHeight() - drawableHeight) / 2;
                    break;
            }
            int bottom = top + drawableHeight;
            int left = isLayoutRtl() ? getWidth() - drawableWidth : 0;
            int right = isLayoutRtl() ? getWidth() : drawableWidth;

            buttonDrawable.setBounds(left, top, right, bottom);
            buttonDrawable.draw(canvas);
        }
    }
  看得出来,在onDrawable()方法中,最主要的部分还是如何确定上下左右四个参数。确定完后就可以画出来了。但是,CompoundButton是一个抽象类,并不能直接使用,那看一下它的子类是如何实现的:

1、CheckBox
 public class CheckBox extends CompoundButton {
    public CheckBox(Context context) {
        this(context, null);
    }
   
    public CheckBox(Context context, AttributeSet attrs) {
        this(context, attrs, com.android.internal.R.attr.checkboxStyle);
    }

    public CheckBox(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
    }

    @Override
    public void onInitializeAccessibilityEvent(AccessibilityEvent event) {
        super.onInitializeAccessibilityEvent(event);
        event.setClassName(CheckBox. class.getName());
    }

    @Override
    public void onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo info) {
        super.onInitializeAccessibilityNodeInfo(info);
        info.setClassName(CheckBox. class.getName());
    }
}
  和Button的实现差不多,使用了一个自己的样式。并且也是重写了那两个方法。再来看一下RadioButton,
public class RadioButton extends CompoundButton {
   
    public RadioButton(Context context) {
        this(context, null);
    }
   
    public RadioButton(Context context, AttributeSet attrs) {
        this(context, attrs, com.android.internal.R.attr.radioButtonStyle);
    }

    public RadioButton(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
    }

    /**
     * {@inheritDoc}
     * 

* If the radio button is already checked, this method will not toggle the radio button. */ @Override public void toggle() { // we override to prevent toggle when the radio is already // checked (as opposed to check boxes widgets) if (!isChecked()) { super.toggle(); } } @Override public void onInitializeAccessibilityEvent(AccessibilityEvent event) { super.onInitializeAccessibilityEvent(event); event.setClassName(RadioButton. class.getName()); } @Override public void onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo info) { super.onInitializeAccessibilityNodeInfo(info); info.setClassName(RadioButton. class.getName()); } }

   和CheckBox实现差不多,区别在于多重写了一个方法,用于防止按钮被重复点击。另外还有ToggleButton以及Switch,前者实现也比较简单,后者稍微麻烦了一些,感兴趣可以自己分析。
  最后切入正题,看看滑动Button要如何实现呢?首先看一下效果图:
 图1-1
  
 图1-2
  图1-1所示的滑动Button实现的思路是这样的,背景图片有开和关的文字,一个按钮在其上面左右滑动,遮住相应的部分,使其在一个位置时候只能看到一个开关。

  如图1-3,在实现的时候,先画一个开关背景图片只,然后在其上面画一个按钮,滑动开关的时候对上面的按钮进行处理即可。
  准备:
    1、按钮图片
       
      
    2、背景图片       
       
 编码:
    在自定义滑动按钮控件的时候,可以有多种选择,可以继承于Button,也可以继承于Button的子类,也可以继承于View类等。我们知道滑动按钮是一个很简单的控件,就是左右滑动改变显示内容,不需要其他的额外东西在里面,所以直接继承于View来实现即可。如果继承于系统的一些控件,那么有很多东西用不到,会造成浪费。
    1、定义一个类继承于View,初始化构造方法,在构造方法中加载图片及其信息。
    2、重写onMeasure()方法,计算控件的大小。
    3、重写onTouchEvent()方法,对滑动事件进行判别处理。
    4、定义接口,实现回调。
    5、重写onDraw()方法,动态画出按钮。
代码如下:
/**
*
*/
package com.kince.slidebutton;

import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.util.AttributeSet;
import android.util.Log;
import android.view.MotionEvent;
import android.view.View;

/**
* @author kince
* @category 左右手势滑动button
* @serial 1.0.0
* @since 2014.5.17
* @see http://blog.csdn.net/wangjinyu501
*
*/
public class SlideButton extends View {

     private Bitmap slideBitMap;// 滑动图片
     private Bitmap switchBitMap;// 背景图片

     private int slideBitMapWidth;// 滑动图片宽度
     private int switchBitMapWidth;// 背景图片宽度
     private int switchBitMapHeight;// 背景图片高度

     private boolean currentState;// 开关状态
     private boolean isSliding = false; // 是否正在滑动中

     private int currentX; // 当前开关的位置

     private OnToggleStateChangedListener mChangedListener;// 回调接口

     /**
     * @param context
     *            在java代码中直接调用使用此构造方法
     */
     public SlideButton(Context context) {
          this(context, null);
          // TODO Auto-generated constructor stub
     }

     /**
     * @param context
     * @param attrs
     *            在xml中使用要用到这个方法
     */
     public SlideButton(Context context, AttributeSet attrs) {
          this(context, attrs, 0);
          // TODO Auto-generated constructor stub
     }

     /**
     * @param context
     * @param attrs
     * @param defStyleAttr
     *            指定一个样式
     */
     public SlideButton(Context context, AttributeSet attrs, int defStyleAttr) {
          super(context, attrs, defStyleAttr);
          initBitmap();
     }

     /**
     * @category 加载背景图片以及开关图片 然后获取各自的宽高
     *
     */
     private void initBitmap() {
          // TODO Auto-generated method stub
          slideBitMap = BitmapFactory.decodeResource(getResources(),
                    R.drawable.slide_button_background);
          switchBitMap = BitmapFactory.decodeResource(getResources(),
                    R.drawable.switch_background);
          slideBitMapWidth = slideBitMap.getWidth();
          switchBitMapWidth = switchBitMap.getWidth();
          switchBitMapHeight = switchBitMap.getHeight();
          Log.i("switchBitMapWidth", switchBitMapWidth + "");
     }

     @Override
     protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
          // TODO Auto-generated method stub
          super.onMeasure(widthMeasureSpec, heightMeasureSpec);
          setMeasuredDimension(switchBitMapWidth, switchBitMapHeight);// 设置控件的宽高
     }

     @Override
     protected void onDraw(Canvas canvas) {
          // 绘制button背景图片
          canvas.drawBitmap(switchBitMap, 0, 0, null);
          // 绘制滑动开关
          if (isSliding) {// 如果当前状态是滑动中 则动态绘制开关
               int dis = currentX - slideBitMapWidth / 2;
               if (dis < 0) {
                    dis = 0;
               } else if (dis > switchBitMapWidth - slideBitMapWidth) {
                    dis = switchBitMapWidth - slideBitMapWidth;
               }
               canvas.drawBitmap(slideBitMap, dis, 0, null);
          } else {
               if (currentState) { // 绘制开关为开的状态
                    canvas.drawBitmap(slideBitMap, switchBitMapWidth
                              - slideBitMapWidth, 0, null);
               } else { // 绘制开关为关的状态
                    canvas.drawBitmap(slideBitMap, 0, 0, null);
               }
          }
          super.onDraw(canvas);
     }

     @Override
     public boolean onTouchEvent(MotionEvent event) {
          // 手势识别 判断滑动方向
          int action = event.getAction();
          switch (action) {
          case MotionEvent.ACTION_DOWN:
               isSliding = true;
               currentX = (int) event.getX();
               break;

          case MotionEvent.ACTION_MOVE:
               currentX = (int) event.getX();
               Log.i("currentX", currentX + "");

               break;
          case MotionEvent.ACTION_UP:
               isSliding = false;
               int bgCenter = switchBitMapWidth / 2;
               boolean state = currentX > bgCenter; // 改变后的状态
               if (state != currentState && mChangedListener != null) {// 添加回调
                    mChangedListener.onToggleStateChanged(state);
               }
               currentState = state;
               break;
          default:
               break;
          }
          invalidate();
          return true;
     }

     public OnToggleStateChangedListener getmChangedListener() {
          return mChangedListener;
     }

     public void setmChangedListener(
               OnToggleStateChangedListener mChangedListener) {
          this.mChangedListener = mChangedListener;
     }

     public boolean isToggleState() {
          return currentState;
     }

     public void setToggleState(boolean currentState) {
          this.currentState = currentState;
     }

}
  回调接口,
  package com.kince.slidebutton;

/**
 * @author kince
 *
 */
public interface OnToggleStateChangedListener {

     /**
      * @category
      * @param state
      */
     public void onToggleStateChanged(boolean state);

}
  Activity代码,
package com.kince.slidebutton;

import android.support.v7.app.ActionBarActivity;
import android.support.v7.app.ActionBar;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentActivity;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Toast;
import android.os.Build;

public class MainActivity extends ActionBarActivity {

     @Override
     protected void onCreate(Bundle savedInstanceState) {
          super.onCreate(savedInstanceState);
          setContentView(R.layout.activity_main);

          if (savedInstanceState == null) {
               getSupportFragmentManager().beginTransaction()
                         .add(R.id.container, new PlaceholderFragment()).commit();
          }
     }

     @Override
     public boolean onCreateOptionsMenu(Menu menu) {

          // Inflate the menu; this adds items to the action bar if it is present.
          getMenuInflater().inflate(R.menu.main, menu);
          return true;
     }

     @Override
     public boolean onOptionsItemSelected(MenuItem item) {
          // Handle action bar item clicks here. The action bar will
          // automatically handle clicks on the Home/Up button, so long
          // as you specify a parent activity in AndroidManifest.xml.
          int id = item.getItemId();
          if (id == R.id.action_settings) {
               return true;
          }
          return super.onOptionsItemSelected(item);
     }

     /**
     * A placeholder fragment containing a simple view.
     */
     public static class PlaceholderFragment extends Fragment implements
               OnToggleStateChangedListener {

          private SlideButton slidebutton;

          public PlaceholderFragment() {
          }

          @Override
          public View onCreateView(LayoutInflater inflater, ViewGroup container,
                    Bundle savedInstanceState) {
               View rootView = inflater.inflate(R.layout.fragment_main, container,
                         false);
               slidebutton = (SlideButton) rootView.findViewById(R.id.slidebutton1);
               // 设置一下开关的状态
               slidebutton.setToggleState(true); // 设置开关的状态为打开
               slidebutton.setmChangedListener(this);
               return rootView;
          }

          @Override
          public void onToggleStateChanged(boolean state) {
               // TODO Auto-generated method stub
               FragmentActivity activity = getActivity();
               if (state) {
                    Toast.makeText(activity, "开关打开", 0).show();
               } else {
                    Toast.makeText(activity, "开关关闭", 0).show();
               }
          }
     }

}
  未完待续。


















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