Question

从代码here开始，我有一个设置适配器的ViewPager。有没有办法禁用滚动动画，以便它在我滑动时“跳转”到新页面？我不打算在onTouchEvent和onInterceptTouchEvent中禁用整个滚动功能，只是滑动动画。

mSectionsPagerAdapter = new SectionsPagerAdapter(getFragmentManager());

// Set up the ViewPager with the sections adapter.
mViewPager = (CustomViewPager) findViewById(R.id.pager);
mViewPager.setAdapter(mSectionsPagerAdapter);

Answer 1

我不知道是否有一个干净的解决方案。但是您可以使用技巧并使用另一个变换器撤消标准页面变换器。 NoPageTransformer看起来像这样：

private static class NoPageTransformer implements ViewPager.PageTransformer {
    public void transformPage(View view, float position) {
        if (position < 0) {
            view.setScrollX((int)((float)(view.getWidth()) * position));
        } else if (position > 0) {
            view.setScrollX(-(int) ((float) (view.getWidth()) * -position));
        } else {
            view.setScrollX(0);
        }
    }
}

要将其添加到ViewPager，请致电：

mViewPager.setPageTransformer(false, new NoPageTransformer());

可以在SDK 16及更高版本中使用。

Answer 2

Kotlin：

viewpager.setPageTransformer(false, FadePageTransformer())


inner class FadePageTransformer : ViewPager.PageTransformer {
    override fun transformPage(view: View, position: Float) {
        view.translationX = view.width * -position

        if (position <= -1.0f || position >= 1.0f) {
            view.alpha = 0.0f
            view.setVisibility(View.GONE);
        } else if (position == 0.0f) {
            view.alpha = 1.0f
            view.setVisibility(View.VISIBLE);
        } else {
            // position is between -1.0F & 0.0F OR 0.0F & 1.0F
            view.alpha = 1.0f - Math.abs(position)
            view.setVisibility(View.GONE);
        }
    }
}

Answer 3

接受的答案仍然具有滑动动画我正在搜索甚至禁用用户滑动动画这是我的实现

1-覆盖Viewpager方法onInterceptTouchEvent和onTouchEvent

2-创建自己的GestureDetector

3-检测滑动手势并使用setCurrentItem(item, false)

ViewPager

public class ViewPagerNoSwipe extends ViewPager {
    private final GestureDetector gestureDetector;
    private OnSwipeListener mOnSwipeListener;

    public void setOnSwipeListener(OnSwipeListener onSwipeListener) {
        mOnSwipeListener = onSwipeListener;
    }

    public ViewPagerNoSwipe(@NonNull Context context) {
        super(context);
        gestureDetector = new GestureDetector(context, new GestureListener());

    }

    public ViewPagerNoSwipe(@NonNull Context context, @Nullable AttributeSet attrs) {
        super(context, attrs);
        gestureDetector = new GestureDetector(context, new GestureListener());


    }

    @Override
    public boolean onTouchEvent(MotionEvent ev) {
        return true;
    }

    @Override
    public boolean onInterceptTouchEvent(MotionEvent ev) {
        gestureDetector.onTouchEvent(ev);
        return false;
    }

    public class GestureListener extends GestureDetector.SimpleOnGestureListener {

        private static final int SWIPE_THRESHOLD = 100;
        private static final int SWIPE_VELOCITY_THRESHOLD = 100;

        @Override
        public boolean onDown(MotionEvent e) {
            return true;
        }

        @Override
        public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) {
            boolean result = false;
            try {
                float diffY = e2.getY() - e1.getY();
                float diffX = e2.getX() - e1.getX();
                if (Math.abs(diffX) > Math.abs(diffY)) {
                    if (Math.abs(diffX) > SWIPE_THRESHOLD && Math.abs(velocityX) > SWIPE_VELOCITY_THRESHOLD) {
                        if (diffX > 0) {
                            if(mOnSwipeListener!=null)
                            mOnSwipeListener.onSwipeRight();
                        } else {
                            if(mOnSwipeListener!=null)
                                mOnSwipeListener.onSwipeLeft();
                        }
                        result = true;
                    }
                } else if (Math.abs(diffY) > SWIPE_THRESHOLD && Math.abs(velocityY) > SWIPE_VELOCITY_THRESHOLD) {
                    if (diffY > 0) {
                        if(mOnSwipeListener!=null)
                            mOnSwipeListener.onSwipeBottom();
                    } else {
                        if(mOnSwipeListener!=null)
                            mOnSwipeListener.onSwipeTop();
                    }
                    result = true;
                }
            } catch (Exception exception) {
                exception.printStackTrace();
            }
            return result;
        }
    }

    public interface OnSwipeListener {

         void onSwipeRight();

        void onSwipeLeft();

        void onSwipeTop();

        void onSwipeBottom();
    }
}

设置ViewPager时，设置swipeListener

postsPager.setOnSwipeListener(new ViewPagerNoSwipe.OnSwipeListener() {
            @Override
            public void onSwipeRight() {

              postsPager.setCurrentItem(postsPager.getCurrentItem() + 1,false);

            }

            @Override
            public void onSwipeLeft() {

            postsPager.setCurrentItem(postsPager.getCurrentItem() - 1, false);

            }
             ...
           }

Answer 4

viewPager.setPageTransformer(false, new NoPageTransformer());

private static class NoPageTransformer implements ViewPager.PageTransformer {
    public void transformPage(@NonNull View view, float position) {
        view.setTranslationX(view.getWidth() * -position);
        if (position <= -1.0f || position >= 1.0f) {
            view.setVisibility(View.GONE);
        } else if (position == 0.0f) {
            view.setVisibility(View.VISIBLE);
        } else {
            view.setVisibility(View.GONE);
        }
    }
}

禁用ViewPager滚动动画

4 个答案: