弧形菜单2(动画渐入)

前言：对前面文章<弧形菜单>加入动画渐入

效果:

开发环境：AndroidStudio2.2.1+gradle-2.14.1

涉及知识：1.自定义控件，2.事件分发等

部分代码：

Activity:

public class HomepageActivity extends AppCompatActivity {    private HomePageMenuLayout homePageMenuLayout;    @Override    protected void onCreate(@Nullable Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.homepage_layout);        initLayout();    }    private void initLayout() {        homePageMenuLayout = (HomePageMenuLayout) findViewById(R.id.homepage_layout);        //加载菜单列表        homePageMenuLayout.setMenuItemIconsAndTexts(Constants.MENUALL);        //才点动画初始        new SwitchAnimationUtil().startAnimation(homePageMenuLayout, SwitchAnimationUtil.AnimationType.ROTATE);        //事件监听        homePageMenuLayout.setOnMenuItemClickListener(new HomePageMenuLayout.OnMenuItemClickListener() {            @Override            public void itemClick(View view, int pos) {                Toast.makeText(HomepageActivity.this, Constants.MENUALL[pos], Toast.LENGTH_SHORT).show();            }        });    }}

动画类：

public class SwitchAnimationUtil {private int mOrderIndex = 0;private int mDelay = 80;private int mDuration = 500;public SwitchAnimationUtil() {}public void startAnimation(View root, AnimationType type) {bindAnimation(root, 0, type);}private void bindAnimation(View view, int depth, AnimationType type) {if (view instanceof ViewGroup) {ViewGroup group = (ViewGroup) view;for (int i = 0; i < group.getChildCount(); i++) {bindAnimation(group.getChildAt(i), depth + 1, type);}} else {runAnimation(view, mDelay * mOrderIndex, type);mOrderIndex++;}}private void runAnimation(View view, long delay, AnimationType type) {switch (type) {case ROTATE:runRotateAnimation(view, delay);break;case ALPHA:runAlphaAnimation(view, delay);break;default:break;}}private void runAlphaAnimation(View view, long delay) {view.setAlpha(0);ObjectAnimator objectAnimator = ObjectAnimator.ofFloat(view, "alpha", 0f, 1f);objectAnimator.setStartDelay(delay);objectAnimator.setDuration(mDuration);objectAnimator.setInterpolator(new LinearInterpolator());objectAnimator.start();}private void runRotateAnimation(View view, long delay) {view.setAlpha(0);AnimatorSet set = new AnimatorSet();ObjectAnimator objectAnimator = ObjectAnimator.ofFloat(view, "rotation", 0f, 0f);ObjectAnimator objectAnimator2 = ObjectAnimator.ofFloat(view, "scaleX", 0f, 1f);ObjectAnimator objectAnimator3 = ObjectAnimator.ofFloat(view, "scaleY", 0f, 1f);ObjectAnimator objectAnimator4 = ObjectAnimator.ofFloat(view, "alpha", 0f, 1f);objectAnimator2.setInterpolator(new AccelerateInterpolator(1.0f));objectAnimator3.setInterpolator(new AccelerateInterpolator(1.0f));set.setDuration(mDuration);set.playTogether(objectAnimator,objectAnimator2, objectAnimator3, objectAnimator4);set.setStartDelay(delay);set.start();}public enum AnimationType {ALPHA, ROTATE}}

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