Question

我有一个嵌套的子scrollview，设置为禁用滚动，直到父scrollview完成向上滚动。设置childScrollView.setNestedScrollingEnabled(true)最初起作用，并在父完全向上滚动后重新启用ResponsiveScrollView parentScroll = (ResponsiveScrollView) findViewById(R.id.parentScroll); final ScrollView childScroll = (ScrollView) findViewById(R.id.childScroll); childScroll.setNestedScrollingEnabled(false); // disabled by default parentScroll.setOnEndScrollListener(new PriorityNestedScrollView.OnEndScrollListener() { @Override public void onUpEndScroll() { Log.i(TAG, "scrolling up has ended"); // successfully fires childScroll.setNestedScrollingEnabled(true); // working... } @Override public void onDownEndScroll() { Log.i(TAG, "scrolling down has ended"); // successfully fires childScroll.setNestedScrollingEnabled(false); // not working... } });。但是，虽然这是有效的，但我希望在父项滚动到底部之后再次禁用嵌套的scrollview，但它不起作用。有什么想法吗？

MainActivity（摘要）：

@Override
protected void onScrollChanged(int x, int y, int oldX, int oldY) {
    super.onScrollChanged(x, y, oldX, oldY);

    // scroll up ended
    if (y >= END) {
        if (onEndScrollListener != null) {
            onEndScrollListener.onUpEndScroll();
        }
    }

    // scroll down ended
    if (y <= START) {
        if (onEndScrollListener != null) {
            onEndScrollListener.onDownEndScroll();
        }
    }
}

ResponsiveScrollView（摘要）：

<div>

Answer 1

这是我如何实现这一目标的。我拦截嵌套的滚动触摸事件，直到父级到达顶部。

ResponsiveScrollView：

@Override
public boolean onInterceptTouchEvent(MotionEvent ev) {
    if (isEnableScrolling()) {
        return super.onInterceptTouchEvent(ev);
    } else {
        return true;
    }
}

...

boolean enableScrolling = false // disabled by default

public boolean isEnableScrolling() {
    return enableScrolling;
}

public void setEnableScrolling(boolean enableScrolling) {
    this.enableScrolling = enableScrolling;
}

MainActivity：

@Override
public void onUpEndScroll() {
    Log.i(TAG, "scrolling up has ended");

    parentScroll.setEnableScrolling(true); // enable scrolling
}

@Override
public void onDownEndScroll() {
    Log.i(TAG, "scrolling down has ended");

    parentScroll.setEnableScrolling(false); // disable scrolling
}

没有调用Android SetNestedScrollingEnabled？

1 个答案: