Android 向上滚动隐藏 View 和向下滚动显示 View 效果，如 twitter

Question

如何在向上滚动隐藏viewpager选项卡(主页，发现， Activity )时做类似twitter的滚动效果。或类似 facebook 滚动的效果，当向下滚动显示选项 View 时，向上滚动隐藏选项 View (状态、照片、签到)。任何示例链接都可以，请提供帮助。

Answer 1

简单的解决方案:

public abstract class OnScrollObserver implements AbsListView.OnScrollListener {

public abstract void onScrollUp();

public abstract void onScrollDown();

@Override
public void onScrollStateChanged(AbsListView view, int scrollState) {
}

int last = 0;
boolean control = true;

@Override
public void onScroll(AbsListView view, int current, int visibles, int total) {
    if (current < last && !control) {
        onScrollUp();
        control = true;
    } else if (current > last && control) {
        onScrollDown();
        control = false;
    }

    last = current;
}

用法:

listView.setOnScrollListener(new OnScrollObserver() {
        @Override
        public void onScrollUp() {

        }

        @Override
        public void onScrollDown() {

        }
    });