floatingActionButton.setOnTouchListener(new View.OnTouchListener() {
  @Override
  public boolean onTouch(View view, MotionEvent ev) {
  switch (ev.getAction()) {
   case MotionEvent.ACTION_DOWN:
   downX = ev.getX();
   downY = ev.getY();
   isClick = true;
   break;
   case MotionEvent.ACTION_MOVE:
   isClick = false;
   moveX = ev.getX();
   moveY = ev.getY();

   int offsetX = (int) (moveX - downX);
   int offsetY = (int) (moveY - downY);

   //这里使用了setTranslation来移动view。。。尝试过layout。不知道为什么fragment切换回来的时候会恢复原位
   floatingActionButton.setTranslationX(floatingActionButton.getTranslationX() + offsetX);
   floatingActionButton.setTranslationY(floatingActionButton.getTranslationY() + offsetY);

   break;
   case MotionEvent.ACTION_UP:
   //用来触发点击事件
   if (isClick) {
    startAct();
    return false;
   }
   //用来判断移动边界

   if (floatingActionButton.getX() < 0) {
    floatingActionButton.setX(0);
   }
   if (floatingActionButton.getX() + floatingActionButton.getWidth() > ScreenUtil.getScreenWidth(getContext())) {
    floatingActionButton.setX(ScreenUtil.getScreenWidth(getContext()) - floatingActionButton.getWidth());
   }
   if (floatingActionButton.getY() < titleHeight) {
    floatingActionButton.setY(0);
   }
   if (floatingActionButton.getY() + floatingActionButton.getHeight() + titleHeight >
    getActivity().findViewById(R.id.activity_main_mainLl).getHeight() - getActivity().findViewById(R.id.fc_rg).getHeight()) {
    floatingActionButton.setY(getBottomY());
   }

   break;
  }
  return true;
  }

  private void startAct() {
  //跳转Activity,传递动画参数
  Intent intent = new Intent(getActivity(), CheckWorkActivity.class);
  intent.putExtra("x", (int) floatingActionButton.getX() + floatingActionButton.getWidth() / 2);
  intent.putExtra("y", (int) floatingActionButton.getY() + floatingActionButton.getHeight() / 2);
  intent.putExtra("start_radius", floatingActionButton.getWidth() / 2);
  intent.putExtra("end_radius", DialogFragment.this.view.getHeight());
  startActivity(intent);
  }
 });

 private void initAnimation() {
 //ll为根布局
 final LinearLayout linearLayout = (LinearLayout) findViewById(R.id.ll);
 linearLayout.post(new Runnable() {
  @Override
  public void run() {
  if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
   Animator animator = ViewAnimationUtils.createCircularReveal(
    linearLayout,// 操作的视图
    getIntent().getIntExtra("x", 0), // 动画的中心点X
    getIntent().getIntExtra("y", 0) + findViewById(R.id.title).getHeight(), // 动画的中心点Y
    getIntent().getIntExtra("start_radius", 0), // 动画半径
    getIntent().getIntExtra("end_radius", 0)  // 动画结束半径
   );
   animator.setInterpolator(new AccelerateInterpolator());
   animator.setDuration(500);
   animator.start();
  }
  }
 });
 }

 private void endAnim() {
 final LinearLayout linearLayout = (LinearLayout) findViewById(R.id.ll);
 if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
  Animator animator = ViewAnimationUtils.createCircularReveal(
   linearLayout,// 操作的视图
   getIntent().getIntExtra("x", 0),
   getIntent().getIntExtra("y", 0) + findViewById(R.id.title).getHeight(),
   getIntent().getIntExtra("end_radius", 0),
   getIntent().getIntExtra("start_radius", 0)

  );
  animator.setInterpolator(new AccelerateInterpolator());
  animator.setDuration(500);
  animator.addListener(new AnimatorListenerAdapter() {
  @Override
  public void onAnimationEnd(Animator animation) {
   super.onAnimationEnd(animation);
   finish();
  }
  });
  animator.start();
 }
 }

 <style name="AppThemeCircleRevel" parent="Theme.AppCompat.Light.NoActionBar">
 <!-- Customize your theme here. -->
 <item name="colorPrimary">@color/colorPrimary</item>
 <item name="colorPrimaryDark">@color/colorPrimaryDark</item>
 <item name="colorAccent">@color/blue</item>

 <item name="android:windowAnimationStyle">@null</item>
 <item name="android:windowBackground">@android:color/transparent</item>
 <item name="android:windowIsTranslucent">true</item>
 <item name="android:colorBackgroundCacheHint">@null</item>
 </style>