public class MyCustomView extends ViewGroup implements View.OnClickListener {  private OnMenuItemClickListener mMenuItemClickListener;  /**   * 點擊子菜單項的回調接口   */  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;  /**   * 菜單的狀態   */  private Status mCurrentStatus = Status.CLOSE;  /**   * 菜單的主按鈕   */  private View mCButton;  public MyCustomView(Context context) {//通過new對象來調用    this(context, null);    Log.i("jj", "super(context)");  }  public MyCustomView(Context context, AttributeSet attrs) {//在布局中使用時調用    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);    // 獲取自定義屬性的值    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++) {      // 測量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);  }  /**   * 切換菜單   */  public void toggleMenu(int duration) {    // 為menuItem添加平移動畫和旋轉動畫    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);          }        }      });      // 旋轉動畫      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();        }      });    }    // 切換菜單狀態    changeStatus();  }  /**   * 添加menuItem的點擊動畫   *   * @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;  }  /**   * 為當前點擊的Item設置變大和透明度降低的動畫   *   * @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;  }  /**   * 切換菜單狀態   */  private void changeStatus() {    mCurrentStatus = (mCurrentStatus == Status.CLOSE ? Status.OPEN        : Status.CLOSE);  }}

<?xml version="1.0" encoding="utf-8"?><resources>  <attr name="radius" format="dimension" />  <declare-styleable name="MyCustomView">    <attr name="radius" />  </declare-styleable></resources>

<com.admom.mycanvas.view.MyCustomView xmlns:android="http://schemas.android.com/apk/res/android"  xmlns:hyman="http://schemas.android.com/apk/res-auto"  xmlns:tools="http://schemas.android.com/tools"  android:id="@+id/id_menu"  android:layout_width="match_parent"  android:layout_height="match_parent"  hyman:radius="160dp">  <RelativeLayout    android:layout_width="wrap_content"    android:layout_height="wrap_content"    android:background="@drawable/composer_button">    <ImageView      android:id="@+id/id_button"      android:layout_width="wrap_content"      android:layout_height="wrap_content"      android:layout_centerInParent="true"      android:src="@drawable/composer_icn_plus" />  </RelativeLayout>  <ImageView    android:layout_width="wrap_content"    android:layout_height="wrap_content"    android:src="@drawable/composer_music"    android:tag="Music" />  <ImageView    android:layout_width="wrap_content"    android:layout_height="wrap_content"    android:src="@drawable/composer_place"    android:tag="Place" />  <ImageView    android:layout_width="wrap_content"    android:layout_height="wrap_content"    android:src="@drawable/composer_sleep"    android:tag="Sleep" />  <ImageView    android:layout_width="wrap_content"    android:layout_height="wrap_content"    android:src="@drawable/composer_thought"    android:tag="Sun" />  <ImageView    android:layout_width="wrap_content"    android:layout_height="wrap_content"    android:src="@drawable/composer_with"    android:tag="People" /></com.admom.mycanvas.view.MyCustomView>

<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"  android:layout_width="match_parent" android:layout_height="match_parent">  <include layout="@layout/menu_right_bottom"/></RelativeLayout>

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;  }});