public class SwitchButton extends View implements View.OnTouchListener {  PRivate Bitmap bg_on, bg_off, slipPEr_BTn;  /**  * 按下时的x和当前的x  */  private float downX, nowX;  /**  * 记录用户是否在滑动  */  private boolean onSlip = false;  /**  * 当前的状态  */  private boolean nowstatus = false;  /**  * 监听接口  */  private OnChangedListener listener;  /**  * 一个滑动的距离临界值，判断是滑动还是点击  * getScaledTouchSlop()：  * Distance in pixels a touch can wander before we think the user is scrolling  * */  private int mTouchSlop=new Viewconfiguration().getScaledTouchSlop();    public SwitchButton(Context context) {  super(context);  init();  }  public SwitchButton(Context context, AttributeSet attrs) {  super(context, attrs);  init();  }  public void init(){  //载入图片资源  bg_on = BitmapFactory.decodeResource(getResources(), R.mipmap.switch_on_on);  bg_off = BitmapFactory.decodeResource(getResources(), R.mipmap.switch_off_off);  slipper_btn = BitmapFactory.decodeResource(getResources(), R.mipmap.switch_ball_ball);  setOnTouchListener(this);  }  protected void onDraw(Canvas canvas) {  super.onDraw(canvas);  Matrix matrix = new Matrix();  Paint paint = new Paint();  float x = 0;  //根据nowX设置背景，开或者关状态  if (nowX < (bg_on.getWidth()/2)){  canvas.drawBitmap(bg_off, matrix, paint);//画出关闭时的背景  }else{  canvas.drawBitmap(bg_on, matrix, paint);//画出打开时的背景  }  if (onSlip) {//是否是在滑动状态,  if(nowX >= bg_on.getWidth())//是否划出指定范围,不能让滑块跑到外头,必须做这个判断  x = bg_on.getWidth() - slipper_btn.getWidth()/2;//减去滑块1/2的长度  else  x = nowX - slipper_btn.getWidth()/2;  }else {  if(nowStatus){//根据当前的状态设置滑块的x值  x = bg_on.getWidth() - slipper_btn.getWidth();  }else{  x = 0;  }  }  //对滑块滑动进行异常处理，不能让滑块出界  if (x < 0 ){  x = 0;  }  else if(x > bg_on.getWidth() - slipper_btn.getWidth()){  x = bg_on.getWidth() - slipper_btn.getWidth();  }  //画出滑块  canvas.drawBitmap(slipper_btn, x, 0, paint);  }    @override  public boolean onTouch(View v, MotionEvent event) {  switch(event.getAction()){  case MotionEvent.ACTION_DOWN:{  if (event.getX() > bg_off.getWidth() || event.getY() > bg_off.getHeight()){  return false;  }else{  onSlip = true;  downX = event.getX();  nowX = downX;  }  break;  }  case MotionEvent.ACTION_MOVE:{  nowX = event.getX();  break;  }  case MotionEvent.ACTION_UP:{  DebugLOG.e("mTouchSlop:"+mTouchSlop);  onSlip = false;  nowX = event.getX();  float float_distance=nowX - downX;  int int_disatnce=(int)float_distance;  DebugLog.e("int_disatnce:"+int_disatnce);  /**  * 滑动距离太短，认定是点击事件  */  if(Math.abs(int_disatnce)<;mTouchSlop){  if(this.isChecked()){  this.setChecked(false);  nowX = 0;  }else{  this.setChecked(true);  nowX = bg_on.getWidth() - slipper_btn.getWidth();  }  }else{  /**  * 滑动距离足够，认为是滑动事件  */  if(event.getX() >= (bg_on.getWidth()/2)){  nowStatus = true;  nowX = bg_on.getWidth() - slipper_btn.getWidth();  }else{  nowStatus = false;  nowX = 0;  }  }  if(listener != null){  listener.OnChanged(SwitchButton.this, nowStatus);  }  break;  }  }  //刷新界面  invalidate();  return true;  }  /**  * 为WiperSwitch设置一个监听，供外部调用的方法  * @param listener  */  public void setOnChangedListener(OnChangedListener listener){  this.listener = listener;  }  /**  * 设置滑动开关的初始状态，供外部调用  * @param checked  */  public void setChecked(boolean checked){  if(checked){  nowX = bg_off.getWidth();  }else{  nowX = 0;  }  nowStatus = checked;  }  public boolean isChecked() {  return nowStatus;  }  /**  * 回调接口  *  */  public interface OnChangedListener {  public void OnChanged(SwitchButton wiperSwitch, boolean checkState);  } }

 <com.uestcneon.chuji.changjianglife.share.SwitchButton  andROId:id="@+id/user_privacy_state"  android:layout_width="wrap_content"  android:layout_height="20dp"  android:layout_marginLeft="30dp" />