Android：ViewPager 内部的 SwipeRefreshLayout 中的 SeekBar

Question

我有一个包含多个Fragment的ViewPager。

每个Fragment中都有一个SwipeRefreshLayout，其中包含一个拖动条。

然而，拖动条的滑块不平滑地移动（水平方向）。

滑块总是移动一定百分比的进度，并且即使我仍在触摸滑块，也会自动释放触摸。

有人遇到过相同的情况吗？

如何解决这个问题？

- Season

Answer 1

@robxyy的回答是正确的，但我花了一段时间才弄清楚实现细节。因此，在详细说明他的答案之前，请查看下面的代码：

public class CustomSwipeRefreshLayout extends SwipeRefreshLayout {
    private int mTouchSlop;
    private float mPrevX;
    private boolean isDisabled;

    public CustomSwipeRefreshLayout(Context context, AttributeSet attrs) {
        super(context, attrs);
        mTouchSlop = ViewConfiguration.get(context).getScaledTouchSlop();
    }

    public void disableInterceptTouchEvent(boolean isDisabled) {
        this.isDisabled = isDisabled;
        getParent().requestDisallowInterceptTouchEvent(isDisabled);
    }

    @Override
    public boolean onInterceptTouchEvent(MotionEvent event) {
        switch (event.getAction()) {
            case MotionEvent.ACTION_DOWN:
                mPrevX = MotionEvent.obtain(event).getX();
                break;
            case MotionEvent.ACTION_MOVE:
                if (isDisabled) {
                    return false;
                }
                float eventX = event.getX();
                float xDiff = Math.abs(eventX - mPrevX);
                if (xDiff > mTouchSlop) {
                    return false;
                }
        }
        return super.onInterceptTouchEvent(event);
    }
}

上面的类正在扩展滑动刷新布局。现在我们需要调用：

disableInterceptTouchEvent(true)

当我们开始滑动 Seekbar 时，我们需要调用：

disableInterceptTouchEvent(false)

当SeekBar停止滑动时，自定义SeekBar类如下所示：

public class SwipeView extends RelativeLayout implements SeekBar.OnSeekBarChangeListener {
    private CustomSwipeRefreshLayout swipeRefreshLayout;

    public SwipePromotionView(CustomSwipeRefreshLayout swipeRefreshLayout) {
        this.swipeRefreshLayout = swipeRefreshLayout;
    }

    @Override
    public void onStartTrackingTouch(SeekBar seekBar) {
          // include some logic here to decide which part of the swipe bar is a valid starting point
        swipeRefreshLayout.disableInterceptTouchEvent(true);
    }

    @Override
    public void onStopTrackingTouch(SeekBar seekBar) {
        swipeRefreshLayout.disableInterceptTouchEvent(false);
    }
}

- Hetang Shah

Answer 2

您可以扩展SwipeRefreshLayout，然后重写onInterceptTouchEvent方法。

    public void disableInterceptTouchEvent(boolean isDisabled) {
        this.isDisabled = isDisabled;
        getParent().requestDisallowInterceptTouchEvent(isDisabled);
    }
@Override 
    public boolean onInterceptTouchEvent(MotionEvent event) {
        switch (event.getAction()) {
          case MotionEvent.ACTION_DOWN:
            mPrevX = MotionEvent.obtain(event).getX();
            break;
          case MotionEvent.ACTION_MOVE:
            if (isDisabled) {
              return false;
            }
            float eventX = event.getX();
            float xDiff = Math.abs(eventX - mPrevX);
            if (xDiff > mTouchSlop) {
              return false;
            }
        }
        return super.onInterceptTouchEvent(event);
    }

- robxyy