public class MainActivity extends AppCompatActivity {private ListView listView;private List<String> mData;private ArrayAdapter mAdapter;private ArcMenuActivity mArc;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);listView = (ListView) findViewById(R.id.listview);mArc = (ArcMenuActivity) findViewById(R.id.view_arc);addData();mAdapter = new ArrayAdapter<String>(MainActivity.this, android.R.layout.simple_list_item_1, mData);listView.setAdapter(mAdapter);listView.setOnScrollListener(new AbsListView.OnScrollListener() {@Overridepublic void onScrollStateChanged(AbsListView view, int scrollState) {}@Overridepublic void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount) {if (mArc.isOpen()) {mArc.toggleMenu(200);}}});mArc.setOnMenuItemClickListener(new ArcMenuActivity.onMenuItemClickListener() {@Overridepublic void onItemClick(View view, int position) {Toast.makeText(MainActivity.this,position+" : "+view.getTag(),Toast.LENGTH_SHORT).show();}});}private void addData() {mData = new ArrayList<String>();for (int i = 'A'; i <= 'z'; i++) {mData.add((char) i + "");}}}

/*** 自定义的ViewGroup，在activity_main.xml里面调用*/
public class ArcMenuActivity extends ViewGroup {private static final int POS_LEFT_TOP = 0;private static final int POS_RIGHT_TOP = 1;private static final int POS_LEFT_BOTTOM = 2;private static final int POS_RIGHT_BOTTOM = 3;private Position mPosition = Position.RIGHT_BOTTOM;private Status mCurrentStatus = Status.CLOSE;private onMenuItemClickListener onMenuItemClick;private View mCButton;       //主菜单按钮private int mRadius;         //卫星半径//卫星菜单位置枚举类public enum Position {LEFT_TOP, RIGHT_TOP, LEFT_BOTTOM, RIGHT_BOTTOM}//主菜单的状态public enum Status {OPEN, CLOSE}//定义一个点击点击子菜单项的回调接口public interface onMenuItemClickListener {void onItemClick(View view, int position);}//自定义的点击方法public void setOnMenuItemClickListener(onMenuItemClickListener onMenuItemClick) {this.onMenuItemClick = onMenuItemClick;}public ArcMenuActivity(Context context) {
//        super(context);this(context, null);}public ArcMenuActivity(Context context, AttributeSet attrs) {
//        super(context, attrs);this(context, attrs, 0);}public ArcMenuActivity(Context context, AttributeSet attrs, int defStyleAttr) {super(context, attrs, defStyleAttr);//获取自定义属性的值TypedArray ta = context.getTheme().obtainStyledAttributes(attrs, R.styleable.ArcMenu, defStyleAttr, 0);//getInt()方法//参数1：所需要赋予给pos的值// 参数2：如果参数1无值，则取该值，就是custom:position="right_bottom"没有定义时int pos = ta.getInt(R.styleable.ArcMenu_position, POS_RIGHT_BOTTOM);switch (pos) {case POS_LEFT_TOP:mPosition = Position.LEFT_TOP;break;case POS_LEFT_BOTTOM:mPosition = Position.LEFT_BOTTOM;break;case POS_RIGHT_TOP:mPosition = Position.RIGHT_TOP;break;case POS_RIGHT_BOTTOM:mPosition = Position.RIGHT_BOTTOM;break;}//半径的默认值mRadius = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 100, getResources().getDisplayMetrics());//getDimension()方法//参数1：所需要赋予给radius的值// 参数2：如果参数1无值，则取该值，就是custom:radius="100"没有定义时mRadius = (int) ta.getDimension(R.styleable.ArcMenu_radius, TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 100, getResources().getDisplayMetrics()));//radius输出的值为pxLog.v("TGA", "position = " + mPosition + ",radius = " + mRadius);ta.recycle();}@Overrideprotected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {//获取activity_main.xml里面的View控件的个数// <my.com.example.x550v.view.ArcMenuActivity/>里面的int count = getChildCount();//测量childfor (int i = 0; i < count; i++) {//xml文件里面控件的位置，宽，高
            measureChild(getChildAt(i), widthMeasureSpec, heightMeasureSpec);}super.onMeasure(widthMeasureSpec, heightMeasureSpec);}@Overrideprotected void onLayout(boolean changed, int l, int t, int r, int b) {if (changed) {//主菜单按钮
            layoutCButton();//子菜单按钮
            subItemButton();}}//定义主菜单按钮private void layoutCButton() {//或者使用findViewById()的方法mCButton = getChildAt(0); //获取第一个xml文件里面的第一个View控件mCButton.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v) {//主菜单动画//这里得使用getContext()来获取contextAnimation animation = AnimationUtils.loadAnimation(getContext(), R.anim.anim);//如果使用setAnimation()只会转一次
                mCButton.startAnimation(animation);//子菜单动画toggleMenu(200);}});//l为主菜单距离父布局的左边距离，t为主菜单距离父布局的顶边距离int l = 0, t = 0;//获取主按钮的宽和高int width = mCButton.getMeasuredWidth();int height = mCButton.getMeasuredHeight();switch (mPosition) {case LEFT_TOP://0,0表示坐上角的位置l = 0;t = 0;break;case RIGHT_TOP:l = getMeasuredWidth() - width;   //getMeasuredWidth()取得容器的宽度t = 0;break;case LEFT_BOTTOM:l = 0;t = getMeasuredHeight() - height; //getMeasuredHeight()取得容器的高度break;case RIGHT_BOTTOM:l = getMeasuredWidth() - width;t = getMeasuredHeight() - height;break;}mCButton.layout(l, t, l + width, t + height);}//定义子菜单按钮public void subItemButton() {//获取activity_main.xml里面的View控件的个数// <my.com.example.x550v.view.ArcMenuActivity/>里面的int count = getChildCount();for (int i = 0; i < count - 1; i++) { //去掉主菜单按钮的一个View child = getChildAt(i + 1);   //从第一个子菜单开始获取，而不是主菜单//开始时设置子菜单为隐藏
            child.setVisibility(GONE);//当子菜单为左上角时，cl为子菜单距离父布局的左边距离，ct为子菜单距离父布局的顶边距离//当子菜单为右上角时，cl为子菜单距离父布局的右边距离，ct为子菜单距离父布局的顶边距离//当子菜单为左下角时，cl为子菜单距离父布局的左边距离，ct为子菜单距离父布局的底边距离//当子菜单为右下角时，cl为子菜单距离父布局的右边距离，ct为子菜单距离父布局的底边距离//Math.PI的值为圆周率pai，角度为180度//Math.PI / 2 / (count - 2)是取出平均角，//*i是看子菜单拥有几个平均角int cl = (int) (mRadius * Math.sin(Math.PI / 2 / (count - 2) * i));
//            Log.v("TAG","cl = "+cl);int ct = (int) (mRadius * Math.cos(Math.PI / 2 / (count - 2) * i));//获取子菜单View的宽和高int cWidth = child.getMeasuredWidth();int cHeight = child.getMeasuredHeight();//如果子菜单在左下，右下if (mPosition == Position.LEFT_BOTTOM || mPosition == Position.RIGHT_BOTTOM) {ct = getMeasuredHeight() - cHeight - ct;Log.v("TAG","getMeasuredHeight()"+getMeasuredHeight());}//如果子菜单在右上，右下if (mPosition == Position.RIGHT_TOP || mPosition == Position.RIGHT_BOTTOM) {cl = getMeasuredWidth() - cWidth - cl;}child.layout(cl, ct, cl + cWidth, ct + cHeight);}}//定义点击主菜单后子菜单出现动画public void toggleMenu(int duration) {int count = getChildCount();for (int i = 0; i < count - 1; i++) {final View childView = getChildAt(i + 1);childView.setVisibility(View.VISIBLE);//end 0,0//startint cl = (int) (mRadius * Math.sin(Math.PI / 2 / (count - 2) * i));int ct = (int) (mRadius * Math.cos(Math.PI / 2 / (count - 2) * i));int xFlag = 1;int yFlag = 1;if (mPosition == Position.LEFT_TOP || mPosition == Position.LEFT_BOTTOM) {xFlag = -1;}if (mPosition == Position.LEFT_TOP || mPosition == Position.RIGHT_TOP) {yFlag = -1;}final AnimationSet animationSet = new AnimationSet(true);//位移动画Animation tranAnim = null;//如果为关闭状态,点击后会散开if (mCurrentStatus == Status.CLOSE) {//子菜单一开始就是扇形排布，其坐标为(0,0)tranAnim = new TranslateAnimation(xFlag * cl, 0, yFlag * ct, 0);childView.setClickable(true);childView.setFocusable(true);}//否则为打开状态，点击后会收缩else {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); //越是后面的子菜单，延迟越多tranAnim.setAnimationListener(new Animation.AnimationListener() {@Overridepublic void onAnimationStart(Animation animation) {}@Overridepublic void onAnimationEnd(Animation animation) {if (mCurrentStatus == Status.CLOSE) {childView.setVisibility(GONE);}}@Overridepublic void onAnimationRepeat(Animation animation) {}});//旋转动画RotateAnimation rotateAnim = new RotateAnimation(0, 360, Animation.RELATIVE_TO_SELF, 0.5f, Animation.RELATIVE_TO_SELF, 0.5f);rotateAnim.setFillAfter(true);rotateAnim.setDuration(duration);//先旋转，再位移//先位移，再旋转更炫
//            animationSet.addAnimation(tranAnim);
            animationSet.addAnimation(rotateAnim);animationSet.addAnimation(tranAnim);childView.startAnimation(animationSet);final int pos = i + 1;//子菜单的点击监听childView.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v) {if (onMenuItemClick != null) {onMenuItemClick.onItemClick(childView, pos);}menuItemAnim(pos - 1);  //子菜单点击动画
                    changeStatus();}});}//切换菜单状态,在for()循环之外
        changeStatus();}//切换菜单状态private void changeStatus() {mCurrentStatus = (mCurrentStatus == Status.CLOSE ? Status.OPEN : Status.CLOSE);}//添加子菜单点击动画private void menuItemAnim(int pos) {for (int i = 0; i < getChildCount() - 1; i++) {View childView = getChildAt(i + 1);if (i == pos) {childView.startAnimation(scaleBigAnimation(300));} else {childView.startAnimation(scaleSmallAnimation(300));}childView.setClickable(false);childView.setFocusable(false);}}//子菜单变大，变小动画private Animation scaleBigAnimation(int duration) {AnimationSet set = new AnimationSet(true);Animation scaleAnim = new ScaleAnimation(1, 2, 1, 2, Animation.RELATIVE_TO_SELF, 0.5f, Animation.RELATIVE_TO_SELF, 0.5f);Animation alphaAnim = new AlphaAnimation(1, 0);set.setDuration(duration);set.addAnimation(scaleAnim);set.addAnimation(alphaAnim);set.setFillAfter(true);return set;}private Animation scaleSmallAnimation(int duration) {AnimationSet set = new AnimationSet(true);Animation scaleAnim = new ScaleAnimation(1, 0, 1, 0, Animation.RELATIVE_TO_SELF, 0.5f, Animation.RELATIVE_TO_SELF, 0.5f);Animation alphaAnim = new AlphaAnimation(1, 0);set.setDuration(duration);set.addAnimation(scaleAnim);set.addAnimation(alphaAnim);set.setFillAfter(true);return set;}public boolean isOpen(){return mCurrentStatus == Status.OPEN;}}

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"xmlns:custom="http://schemas.android.com/apk/res-auto"xmlns:tools="http://schemas.android.com/tools"android:layout_width="match_parent"android:layout_height="match_parent"tools:context=".MainActivity"><ListViewandroid:id="@+id/listview"android:layout_width="match_parent"android:layout_height="match_parent"/><my.com.example.x550v.view.ArcMenuActivityandroid:id="@+id/view.arc"android:layout_width="match_parent"android:layout_height="match_parent"custom:position="right_bottom"custom:radius="200dp"><RelativeLayoutandroid:layout_width="wrap_content"android:layout_height="wrap_content"android:background="@drawable/composer_button"><ImageViewandroid:id="@+id/iv_button"android:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_centerInParent="true"android:src="@drawable/composer_icn_plus" /></RelativeLayout><ImageViewandroid:layout_width="wrap_content"android:layout_height="wrap_content"android:src="@drawable/composer_camera"android:tag="Camera" /><ImageViewandroid:layout_width="wrap_content"android:layout_height="wrap_content"android:src="@drawable/composer_music"android:tag="Music" /><ImageViewandroid:layout_width="wrap_content"android:layout_height="wrap_content"android:src="@drawable/composer_place"android:tag="Place" /><ImageViewandroid:layout_width="wrap_content"android:layout_height="wrap_content"android:src="@drawable/composer_sleep"android:tag="Sleep" /><ImageViewandroid:layout_width="wrap_content"android:layout_height="wrap_content"android:src="@drawable/composer_thought"android:tag="Thought" /><ImageViewandroid:layout_width="wrap_content"android:layout_height="wrap_content"android:src="@drawable/composer_with"android:tag="With" /></my.com.example.x550v.view.ArcMenuActivity></RelativeLayout>

<resources><attr name="position"><enum name="left_top" value="0" /><enum name="right_top" value="1" /><enum name="left_bottom" value="2" /><enum name="right_bottom" value="3" /></attr><attr name="radius" format="dimension" /><declare-styleable name="ArcMenu"><attr name="position" /><attr name="radius" /></declare-styleable></resources>

<setxmlns:android="http://schemas.android.com/apk/res/android"><rotateandroid:duration="500"android:fromDegrees="0"android:toDegrees="360"android:pivotX="50%"android:pivotY="50%"android:fillAfter="true"/>
</set>