コード例 #1
0
  @Override
  protected void onDraw(Canvas canvas) {
    super.onDraw(canvas);

    if (mViewPager == null) {
      return;
    }
    final int count = mViewPager.getAdapter().getCount();
    if (count == 0) {
      return;
    }

    if (mCurrentPage >= count) {
      setCurrentItem(count - 1);
      return;
    }

    final int paddingLeft = getPaddingLeft();
    final float pageWidth = (getWidth() - paddingLeft - getPaddingRight()) / (1f * count);
    final float left = paddingLeft + pageWidth * (mCurrentPage + mPositionOffset);
    final float right = left + pageWidth;
    final float top = getPaddingTop();
    final float bottom = getHeight() - getPaddingBottom();
    canvas.drawRect(left, top, right, bottom, mPaint);
  }
コード例 #2
0
 @Override
 public void setViewPager(ViewPager view, int initialPosition) {
   setViewPager(view);
   setCurrentItem(initialPosition);
 }