Android 无法将ViewPager放入ScrollVIew/NestedScrollView中

我有一个ViewPager，它位于父线性布局中，ViewPager下面有一些按钮。ViewPager工作得很好，直到最近我才将父视图从LinearLayout更改为ScrollView。现在ViewPager消失了。请不要将其标记为垃圾邮件或重复

此外，Playstore上有大量应用程序正在使用此功能。请参阅此应用程序-

我的尝试：

setFillViewport（true）-这对我不起作用

将布局高度设置为0dp

使用自定义滚动视图

这些都帮不了我。我正在安卓M上运行这个应用程序

这是my layout.xml：

<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.widget.NestedScrollView
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:fillViewport="true"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@color/black"
tools:context=".activities.HomeActivity">

<LinearLayout
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">

<android.support.v4.view.ViewPager
android:id="@+id/pager"
android:onClick="pagerClick"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_gravity="top"
android:layout_weight="1"
android:overScrollMode="never"/>

<RelativeLayout
android:layout_weight="0.8"
android:layout_marginTop="30dp"
android:layout_width="match_parent"
android:layout_height="wrap_content">
.....two buttons
</RelativeLayout>

</LinearLayout>

</android.support.v4.widget.NestedScrollView>

……两个按钮

问题：

---

我怎样才能做到这一点？还有，有没有一个官方的方法

最好使用recyclerView，并在适配器中添加Viewpager作为其子级。您需要截取recyclerview的触碰，以将滚动显示到ViewPager

public class TouchInterceptRecyclerView extends RecyclerView {

    private boolean interceptTouch = true;
    private static final int MIN_DISTANCE = 200;
    private float downX = 0, downY = 0, moveX = 0, moveY = 0, upX = 0, upY;

    public TouchInterceptRecyclerView(Context context) {
        super(context);
    }

    public TouchInterceptRecyclerView(Context context, @Nullable AttributeSet attrs) {
        super(context, attrs);
    }


    @Override
    public boolean onInterceptTouchEvent(MotionEvent ev) {
        if (getRvTop() == 0) {
            onTouchEvent(ev);
        }
        return interceptTouch;
    }

    @Override
    public boolean onTouchEvent(MotionEvent event) {
        switch (event.getAction()) {
            case MotionEvent.ACTION_DOWN:
                downX = event.getX();
                downY = event.getY();
                break;
            case MotionEvent.ACTION_MOVE:
                moveX = event.getX();
                moveY = event.getY();
                break;
            case MotionEvent.ACTION_UP:
                upX = event.getX();
                upY = event.getY();
                break;
        }
        float deltaX = upX - downX;

        if (getViewTop() == 0 && moveY > downY && Math.abs(moveY - downY) > MIN_DISTANCE) {  // moving down
            interceptTouch = true;
        }else if (Math.abs(deltaX) > MIN_DISTANCE) {
            if (upX > downX) {    // Left to Right swipe action
                interceptTouch = false;
            }else {    // Right to left swipe action
                interceptTouch = false;
            }
        } else {  // screen tap
            interceptTouch = false;
        }
        return super.onTouchEvent(event);
    }

    @Override
    public boolean dispatchTouchEvent(MotionEvent ev) {
        return super.dispatchTouchEvent(ev);
    }

    @Override
    protected void onScrollChanged(int l, int t, int oldl, int oldt) {
        super.onScrollChanged(l, t, oldl, oldt);
    }

    @Override
    public void onScrolled(int dx, int dy) {
        if (getViewTop() <= 0) {
            interceptTouch = false;            // dispatch the touch to child when reached top
        } else {
            interceptTouch = true;           // do not dispatch the touch event
        }
        super.onScrolled(dx, dy);
    }

    public int getViewTop() {
        int top = 0;
        View v = this.getChildAt(1);
        if (v == null) {
            v = this.getChildAt(0);
        }
        if (v != null && v instanceof LinearLayout) {
            top = v.getTop();
        }
        return top;
    }

    public int getRvTop() {
        int top = -1;
        View v = this.getChildAt(1);
        if (v == null) {
            v = this.getChildAt(0);
        }
        if (v != null && v instanceof LinearLayout) {

            ViewPager vp = (ViewPager) v.findViewById(R.id.single_pager);
            if (vp != null) {
                int currentPos = vp.getCurrentItem();
                RecyclerView rv = (RecyclerView) vp.findViewWithTag("recyclerview" + currentPos);
                if (rv != null) {
                    View v1 = rv.getChildAt(0);
                    if (v1 != null && v1 instanceof CardView) {
                        top = v1.getTop() - ResourceUtils.getDimensionPixelOffset(R.dimen.padding_20);   // deducting 20 as we have give top margin as 20 to the top layout
                    }
                }
            }
        }
        return top;
    }
}

---

我通过调整ViewPager的高度解决了此问题，如下所示：

<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.widget.NestedScrollView
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:fillViewport="true"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@color/black"
tools:context=".activities.HomeActivity">

<LinearLayout
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">

<android.support.v4.view.ViewPager
android:id="@+id/pager"
android:onClick="pagerClick"
android:layout_width="match_parent"
android:layout_height="200dp"
android:layout_gravity="top"/>

...

</LinearLayout>

</android.support.v4.widget.NestedScrollView>

...

将嵌套的scrollview放入父布局中，例如：CoordinatorLayout这也无助于发布完整的xml。添加了完整的布局。xml感谢您抽出时间回答这个问题。也许我可以使用Recycler视图来完成工作，但是RecyclerView和ScrollView在概念上有区别。我想知道有没有一种方法我们可以一起使用ScrollView和ViewPager？是的，你可以用同样的方法使用ScrollView，只是你需要处理两者的触摸。

<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.widget.NestedScrollView
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:fillViewport="true"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@color/black"
tools:context=".activities.HomeActivity">

<LinearLayout
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">

<android.support.v4.view.ViewPager
android:id="@+id/pager"
android:onClick="pagerClick"
android:layout_width="match_parent"
android:layout_height="200dp"
android:layout_gravity="top"/>

...

</LinearLayout>

</android.support.v4.widget.NestedScrollView>