Android自定义viewGroup实现点击动画效果

public class MyCustomView extends ViewGroup implements View.OnClickListener {

  private OnMenuItemClickListener mMenuItemClickListener;

  /**
   * 点击子菜单项的回调接口
   */
  public interface OnMenuItemClickListener {
    void onClick(View view, int pos);
  }

  public void setOnMenuItemClickListener(
      OnMenuItemClickListener mMenuItemClickListener) {
    this.mMenuItemClickListener = mMenuItemClickListener;
  }

  public enum Status {
    OPEN, CLOSE
  }

  private int mRadius;
  /**
   * 菜单的状态
   */
  private Status mCurrentStatus = Status.CLOSE;
  /**
   * 菜单的主按钮
   */
  private View mCButton;

  public MyCustomView(Context context) {//通过new对象来调用
    this(context, null);
    Log.i("jj", "super(context)");
  }

  public MyCustomView(Context context, AttributeSet attrs) {//在布局中使用时调用
    this(context, attrs, 0);
    Log.i("jj", "super(context, attrs)");
  }

  public MyCustomView(Context context, AttributeSet attrs, int defStyleAttr) {
    super(context, attrs, defStyleAttr);
    Log.i("jj", "super(context, attrs, defStyleAttr)");
    mRadius = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 100, getResources().getDisplayMetrics());
    Log.i("jj", "mRadius1: " + mRadius);
    // 获取自定义属性的值
    TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.MyCustomView, defStyleAttr, 0);
    mRadius = (int) a.getDimension(R.styleable.MyCustomView_radius, TypedValue
        .applyDimension(TypedValue.COMPLEX_UNIT_DIP, 100,
            getResources().getDisplayMetrics()));
    Log.i("jj", "mRadius: " + mRadius);
    a.recycle();
  }

  @Override
  protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
    int count = getChildCount();
    for (int i = 0; i < count; i++) {
      // 测量child
      measureChild(getChildAt(i), widthMeasureSpec, heightMeasureSpec);
    }
    super.onMeasure(widthMeasureSpec, heightMeasureSpec);
  }

  @Override
  protected void onLayout(boolean changed, int l, int t, int r, int b) {
    if (changed) {
      layoutCButton();
      int count = getChildCount();
      for (int i = 0; i < count - 1; i++) {
        View child = getChildAt(i + 1);
        child.setVisibility(View.GONE);
        int cl = (int) (mRadius * Math.sin(Math.PI / 2 / (count - 2)
            * i));
        int ct = (int) (mRadius * Math.cos(Math.PI / 2 / (count - 2)
            * i));
        int cWidth = child.getMeasuredWidth();
        int cHeight = child.getMeasuredHeight();
        ct = getMeasuredHeight() - cHeight - ct;
        cl = getMeasuredWidth() - cWidth - cl;
        child.layout(cl, ct, cl + cWidth, ct + cHeight);
      }
    }
  }

  private void layoutCButton() {
    mCButton = getChildAt(0);
    mCButton.setOnClickListener(this);
    int width = mCButton.getMeasuredWidth();
    int height = mCButton.getMeasuredHeight();
    int l = getMeasuredWidth() - width;
    int t = getMeasuredHeight() - height;
    mCButton.layout(l, t, l + width, t + width);
  }

  @Override
  public void onClick(View v) {
    rotateCButton(v, 0f, 360f, 300);
    toggleMenu(300);
  }

  private void rotateCButton(View v, float start, float end, int duration) {

    RotateAnimation anim = new RotateAnimation(start, end,
        Animation.RELATIVE_TO_SELF, 0.5f, Animation.RELATIVE_TO_SELF,
        0.5f);
    anim.setDuration(duration);
    anim.setFillAfter(true);
    v.startAnimation(anim);
  }

  /**
   * 切换菜单
   */
  public void toggleMenu(int duration) {
    // 为menuItem添加平移动画和旋转动画
    int count = getChildCount();
    for (int i = 0; i < count - 1; i++) {
      final View childView = getChildAt(i + 1);
      childView.setVisibility(View.VISIBLE);
      int cl = (int) (mRadius * Math.sin(Math.PI / 2 / (count - 2) * i));
      int ct = (int) (mRadius * Math.cos(Math.PI / 2 / (count - 2) * i));

      AnimationSet animset = new AnimationSet(true);
      Animation tranAnim = null;
      int xflag = 1;
      int yflag = 1;
      // to open
      if (mCurrentStatus == Status.CLOSE) {
        tranAnim = new TranslateAnimation(xflag * cl, 0, yflag * ct, 0);
        childView.setClickable(true);
        childView.setFocusable(true);

      } else
      // to close
      {
        tranAnim = new TranslateAnimation(0, xflag * cl, 0, yflag * ct);
        childView.setClickable(false);
        childView.setFocusable(false);
      }
      tranAnim.setFillAfter(true);
      tranAnim.setDuration(duration);
      tranAnim.setStartOffset((i * 100) / count);
      tranAnim.setAnimationListener(new Animation.AnimationListener() {

        @Override
        public void onAnimationStart(Animation animation) {

        }

        @Override
        public void onAnimationRepeat(Animation animation) {

        }

        @Override
        public void onAnimationEnd(Animation animation) {
          if (mCurrentStatus == Status.CLOSE) {
            childView.setVisibility(View.GONE);
          }
        }
      });
      // 旋转动画
      RotateAnimation rotateAnim = new RotateAnimation(0, 720,
          Animation.RELATIVE_TO_SELF, 0.5f,
          Animation.RELATIVE_TO_SELF, 0.5f);
      rotateAnim.setDuration(duration);
      rotateAnim.setFillAfter(true);
      animset.addAnimation(rotateAnim);
      animset.addAnimation(tranAnim);
      childView.startAnimation(animset);
      final int pos = i + 1;
      childView.setOnClickListener(new OnClickListener() {
        @Override
        public void onClick(View v) {
          if (mMenuItemClickListener != null)
            mMenuItemClickListener.onClick(childView, pos);
          menuItemAnim(pos - 1);
          changeStatus();

        }
      });
    }
    // 切换菜单状态
    changeStatus();
  }


  /**
   * 添加menuItem的点击动画
   *
   * @param
   */
  private void menuItemAnim(int pos) {
    for (int i = 0; i < getChildCount() - 1; i++) {

      View childView = getChildAt(i + 1);
      if (i == pos) {
        childView.startAnimation(scaleBigAnim(300));
      } else {
        childView.startAnimation(scaleSmallAnim(300));
      }

      childView.setClickable(false);
      childView.setFocusable(false);

    }

  }

  private Animation scaleSmallAnim(int duration) {

    AnimationSet animationSet = new AnimationSet(true);

    ScaleAnimation scaleAnim = new ScaleAnimation(1.0f, 0.0f, 1.0f, 0.0f,
        Animation.RELATIVE_TO_SELF, 0.5f, Animation.RELATIVE_TO_SELF,
        0.5f);
    AlphaAnimation alphaAnim = new AlphaAnimation(1f, 0.0f);
    animationSet.addAnimation(scaleAnim);
    animationSet.addAnimation(alphaAnim);
    animationSet.setDuration(duration);
    animationSet.setFillAfter(true);
    return animationSet;

  }

  /**
   * 为当前点击的Item设置变大和透明度降低的动画
   *
   * @param duration
   * @return
   */
  private Animation scaleBigAnim(int duration) {
    AnimationSet animationSet = new AnimationSet(true);

    ScaleAnimation scaleAnim = new ScaleAnimation(1.0f, 4.0f, 1.0f, 4.0f,
        Animation.RELATIVE_TO_SELF, 0.5f, Animation.RELATIVE_TO_SELF,
        0.5f);
    AlphaAnimation alphaAnim = new AlphaAnimation(1f, 0.0f);

    animationSet.addAnimation(scaleAnim);
    animationSet.addAnimation(alphaAnim);

    animationSet.setDuration(duration);
    animationSet.setFillAfter(true);
    return animationSet;

  }


  public boolean isOpen() {
    return mCurrentStatus == Status.OPEN;
  }


  /**
   * 切换菜单状态
   */
  private void changeStatus() {
    mCurrentStatus = (mCurrentStatus == Status.CLOSE ? Status.OPEN
        : Status.CLOSE);
  }


}

<?xml version="1.0" encoding="utf-8"?>

  
  
    
  

<?xml version="1.0" encoding="utf-8"?>


  

mMenu = (MyCustomView) findViewById(R.id.id_menu);
mMenu.setOnMenuItemClickListener(new MyCustomView.OnMenuItemClickListener() {
  @Override
  public void onClick(View view, int pos) {
    Toast.makeText(MainActivity.this, pos + ":" + view.getTag(), Toast.LENGTH_SHORT).show();
  }
});
mMenu.setOnTouchListener(new View.OnTouchListener() {
  @Override
  public boolean onTouch(View v, MotionEvent event) {
    if(mMenu.isOpen()){
      mMenu.toggleMenu(300);
    }
    return false;
  }
});