public class HomePageMenuLayout extends ViewGroup {
 private Context context;
 // 菜單項的文本
 private String[] mItemTexts = null;
 private int StatusHeight;//狀態欄高度
 public HomePageMenuLayout(Context context, AttributeSet attrs) {
 super(context, attrs);
 this.context = context;
 StatusHeight = ScreenUtils.getStatusHeight(context);
 }
 /**
 * 設置布局的寬高，并策略menu item寬高
 */
 int resWidth = 0;
 int resHeight = 0;
 int mRadius = 0;
 @Override
 protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
 //布局寬高尺寸設置為屏幕尺寸
 //設置該布局的大小
 setMeasuredDimension(widthMeasureSpec, heightMeasureSpec);
 /**
 * 根據傳入的參數，分別獲取測量模式和測量值
 */
 int width = MeasureSpec.getSize(widthMeasureSpec);
 resHeight = MeasureSpec.getSize(heightMeasureSpec);
 resWidth = MeasureSpec.getSize(widthMeasureSpec);
 // 獲得半徑
 mRadius = (int) (resHeight / 2 - 2 * StatusHeight);
 //設置item尺寸
 int childSize = (int) (mRadius * 1 / 2);
 // menu item測量模式--精確模式
 int childMode = MeasureSpec.EXACTLY;
 for (int i = 0; i < getChildCount(); i++) {
 final View child = getChildAt(i);
 if (child.getVisibility() == GONE) {
 continue;
 }
 // 計算menu item的尺寸；以及和設置好的模式，去對item進行測量
 int makeMeasureSpec = -1;
 makeMeasureSpec = MeasureSpec.makeMeasureSpec(childSize, childMode);
 child.measure(makeMeasureSpec, makeMeasureSpec);
 }
 }
 /**
 * item布局的角度
 */
 private int[] widthall = null;
 /**
 * 設置Item的位置：第一個參數1：該參數指出當前ViewGroup的尺寸或者位置是否發生了改變
 * 2.當期繪圖光標橫坐標位置
 * 3.當前繪圖光標縱坐標位置
 */
 @Override
 protected void onLayout(boolean changed, int l, int t, int r, int b) {
 int left, top;
 int cWidth = (int) (mRadius * 1 / 2);
 final int childCount = getChildCount();
 // 計算，中心點到menu item中心的距離
 float tmp = mRadius - cWidth / 2;
 // 遍歷去設置menuitem的位置
 for (int i = 0; i < childCount; i++) {
 final View child = getChildAt(i);
 if (child.getVisibility() == GONE) {
 continue;
 }
 left = (int) (mRadius * Math.cos(Math.toRadians(widthall[i]))) - 65;
 top = (int) (mRadius - (resHeight / 2 - 2 * StatusHeight) * Math.sin(Math.toRadians(widthall[i])) - StatusHeight);
 child.layout(left, top, left + cWidth, top + cWidth);
 }
 }
 public interface OnMenuItemClickListener {
 void itemClick(View view, int pos);
 }
 public void setOnMenuItemClickListener(
 OnMenuItemClickListener mOnMenuItemClickListener) {
 this.mOnMenuItemClickListener = mOnMenuItemClickListener;
 }
 // 菜單的個數
 private int mMenuItemCount;
 /**
 * 設置菜單條目的圖標和文本
 */
 public void setMenuItemIconsAndTexts(String[] mItemTexts) {
 this.mItemTexts = mItemTexts;
 this.mMenuItemCount = mItemTexts.length;
 resultAngle();
 addMenuItems();
 }
 private void resultAngle() {
 switch (this.mMenuItemCount) {
 case 3:
 widthall = Constants.ITEM3;
 break;
 case 4:
 widthall = Constants.ITEM4;
 break;
 case 5:
 widthall = Constants.ITEM5;
 break;
 case 6:
 widthall = Constants.ITEM6;
 break;
 case 7:
 widthall = Constants.ITEM7;
 break;
 case 8:
 widthall = Constants.ITEM8;
 break;
 case 9:
 widthall = Constants.ITEM9;
 break;
 case 10:
 widthall = Constants.ITEM10;
 break;
 default:
 break;
 }
 }
 /**
 * 設置菜單條目的圖標和文本
 */
 public void setMenuItemIconsAndTexts() {
 addMenuItems();
 }
 private int mMenuItemLayoutId = R.layout.homepage_item_layout;
 /**
 * MenuItem的點擊事件接口
 */
 private OnMenuItemClickListener mOnMenuItemClickListener;
 private float yPosition = 0;
 /**
 * 添加菜單項
 */
 private void addMenuItems() {
 LayoutInflater mInflater = LayoutInflater.from(getContext());
 /**
 * 根據用戶設置的參數，初始化view
 */
 for (int i = 0; i < mMenuItemCount; i++) {
 final int j = i;
 View view = mInflater.inflate(mMenuItemLayoutId, this, false);

 final ImageView iv = (ImageView) view
  .findViewById(R.id.homepage_pager1_item_img);
 final TextView tv = (TextView) view
  .findViewById(R.id.homepage_pager1_item_tv);
 if (iv != null) {
 iv.setImageResource(R.mipmap.menu_ture);
 }
 if (tv != null) {
 tv.setText(mItemTexts[i]);
 }
 view.findViewById(R.id.homepage_item_layout).setOnClickListener(new OnClickListener() {
 @Override
 public void onClick(View v) {}
 });
 view.findViewById(R.id.homepage_item_layout).setOnTouchListener(new OnTouchListener() {
 @Override
 public boolean onTouch(View v, MotionEvent event) {
  if (event.getAction() == MotionEvent.ACTION_DOWN) {
  yPosition = event.getY();//獲取按下的位置
  iv.setImageResource(R.mipmap.menu);
  } else if (event.getAction() == MotionEvent.ACTION_UP) {
  iv.setImageResource(R.mipmap.menu_ture);
  float displacement = Math.abs(yPosition - event.getY());
  //精確按下的位置做出響應
  if (mOnMenuItemClickListener != null&&displacement<25) {
  mOnMenuItemClickListener.itemClick(v,j);
  }
  } else if (event.getAction() == MotionEvent.ACTION_CANCEL || event.getAction() == MotionEvent.ACTION_POINTER_UP) {
  iv.setImageResource(R.mipmap.menu_ture);
  }
  return true;
 }
 });
 addView(view);
 }
 }
}