Android实现仿微信tab高亮icon粘着手的滑动效果

  <RelativeLayout
    android:layout_width="match_parent"
    android:layout_height="@dimen/height_56">

    <com.widget.TabPageIndicator
      android:id="@+id/indicator"
      android:layout_width="fill_parent"
      android:layout_height="@dimen/height_56"
      android:background="@drawable/base_action_bar_bg" />
    <ImageView
      android:id="@+id/highlight_tab_iv"
      android:layout_height="wrap_content"
      android:layout_width="90dp"
      android:background="@drawable/base_tabpager_indicator_selected"
      android:layout_alignParentBottom="true"/>

  </RelativeLayout>

     mHlTabIv = (ImageView)findViewById(R.id.highlight_tab_iv);
    RelativeLayout.LayoutParams mParams =
        (RelativeLayout.LayoutParams)mHlTabIv.getLayoutParams();
    mParams.width = getScreenWidth() / tabCount;
    mTabViewWidth = mParams.width;
    mHlTabIv.setLayoutParams(mParams);

    mTabPageIndicator.setOnPageChangeListener(new OnPageChangeListener() {

      @Override
      public void onPageSelected(int index) {
      }

      @Override
      public void onPageScrolled(int currentPos, float percent, int delta) {
        if (!mIsScrolling)
          mAnimator.translationX(mTabViewWidth * currentPos + delta
                      / tabCount).setDuration(50)
              .setListener(new Animator.AnimatorListener() {

                @Override
                public void onAnimationStart(Animator animation) {
                  mIsScrolling = true;
                }

                @Override
                public void onAnimationRepeat(Animator animation) {
                }

                @Override
                public void onAnimationEnd(Animator animation) {
                  mIsScrolling = false;
                }

                @Override
                public void onAnimationCancel(Animator animation) {
                  mIsScrolling = false;
                }
              }).start();
      }

      @Override
      public void onPageScrollStateChanged(int arg0) {
      }
    });