android底部星级菜单

这一篇文在上一篇的基础上做的功能修改(上一篇地址：https://www.jianshu.com/p/ecea65f4015d)
效果图如下：

底部星级菜单效果图.gif

主要的修改有下面几个方面：
1.主菜单有五个，点击第三个会打开星级菜单
2.在星级菜单打开的情况，点击其余的主菜单会关闭星级菜单
3.主菜单和星级菜单的位置不一样了，星级菜单这次是180度的区域
4.星级菜单的移动动画的路径不一样
1.前面的步骤还是一样，自定义属性，自定义view，绘制xml布局，在自定义的view里面获取半径，重写onMeasure方法
2.重写onLayout方法
测量主button的位置

    private void layoutCenter2() {
        LinearLayout mainView = (LinearLayout) getChildAt(0);
        int width = mainView.getMeasuredWidth();
        int height = mainView.getMeasuredHeight();
        int t = getMeasuredHeight() - height;
        mainView.layout(0, t, width, getMeasuredHeight());
        mCButton = findViewById(R.id.btnCenter);
        findViewById(R.id.btnMain1).setOnClickListener(this);
        findViewById(R.id.btnMain2).setOnClickListener(this);
        findViewById(R.id.btnMain3).setOnClickListener(this);
        findViewById(R.id.btnMain4).setOnClickListener(this);
        mCButton.setOnClickListener(this);
    }

测量星级菜单的位置

底部星级菜单位置.png

    /**
     * 设置itemMenu的位置
     */
    private void layoutIButtom() {
        int cout = getChildCount();
        for (int i = 0; i < cout - 1; i++) {
            View childView = getChildAt(i + 1);
            int width = childView.getMeasuredWidth();
            int height = childView.getMeasuredHeight();
            //相对坐标
            int rlx = (int) (mRadius * Math.cos(Math.PI / cout * (i + 1)));
            int rly = (int) (mRadius * Math.sin(Math.PI / cout * (i + 1)));

            int l = getMeasuredWidth() / 2 + rlx - width / 2;
            int t = getMeasuredHeight() - rly - height;
            childView.layout(l, t, l + width, t + height);

            childView.setVisibility(GONE);
        }
    }

3.点击中间的星级菜单的动画效果，主菜单还是一样的，星级菜单会有点区别

    /**
     * mune的动画效果
     *
     * @param duration
     */
    private void toggleItemMenu(int duration) {
        int count = getChildCount();
        for (int i = 0; i < count - 1; i++) {
            final View childView = getChildAt(i + 1);
            childView.setVisibility(VISIBLE);

            int rlx = (int) (mRadius * Math.cos(Math.PI / count * (i + 1)));
            int rly = (int) (mRadius * Math.sin(Math.PI / count * (i + 1)));

            AnimationSet animationSet = new AnimationSet(true);
            //位移动画
            TranslateAnimation translateAnimation = null;
            //打开
            if (mCurrentStatus == State.CLOSE) {
                translateAnimation = new TranslateAnimation(-rlx, 0f, rly, 0f);
                childView.setEnabled(true);
                childView.setFocusable(true);
            } else {//关闭
                translateAnimation = new TranslateAnimation(0f, -rlx, 0f, rly);
            }

            translateAnimation.setDuration(duration);
            translateAnimation.setFillAfter(true);
            //旋转动画
            RotateAnimation rotateAnimation = new RotateAnimation(0, 720, Animation.RELATIVE_TO_SELF, 0.5f, Animation.RELATIVE_TO_SELF, 0.5f);
            rotateAnimation.setDuration(duration);
            rotateAnimation.setFillAfter(true);

            animationSet.addAnimation(rotateAnimation);
            animationSet.addAnimation(translateAnimation);
            childView.startAnimation(animationSet);

            animationSet.setAnimationListener(new Animation.AnimationListener() {
                @Override
                public void onAnimationStart(Animation animation) {

                }

                @Override
                public void onAnimationEnd(Animation animation) {
                    if (mCurrentStatus == State.CLOSE) {
                        childView.setVisibility(GONE);
                    }
                }

                @Override
                public void onAnimationRepeat(Animation animation) {

                }
            });

            final int pos = i + 1;
            childView.setOnClickListener(new OnClickListener() {
                @Override
                public void onClick(View v) {
                    if (onMenuItemClick != null) {
                        onMenuItemClick.onItemMenuItemClick(pos);
                    }
                    onMenuItemAnmiate(pos - 1);
                    changeMenuStatus();
                }
            });
        }

        changeMenuStatus();
    }

其余的效果都差不多，项目地址和上篇的项目地址是一样的