Question

所以，我有一个ScrollView有一个孩子 - LinearLayout有两个孩子：TextView和ViewPager。 ViewPager包含许多元素的布局，这就是为什么我需要能够垂直滚动的原因。只有ViewPager中的页面可以水平滚动（即：我只想在ViewPager内水平滑动）。那个TextView不得水平滚动，而应与我的ViewPager一起滚动。

简单？否。

我在StackOverflow弹出时看到了极为相似的问题（here，here和here以及here）。建议的解决方案都不适合我:(

我看到的是this＆lt; - 我的甜蜜UI :)但是我不能垂直滚动：（

在ViewPager中嵌入ScrollViews不是一个选项 - UI的设计禁止这样做。

也许这是我用编程方式填充查看分页器中的每个页面的东西？嗯...

任何建议都将不胜感激。

我的代码：

activity_main.xml中：

<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"

                android:id="@+id/scrollView"
                android:layout_width="fill_parent"
                android:layout_height="fill_parent"
                android:background="@android:color/white"
                android:fillViewport="true" >

                <LinearLayout
                    android:id="@+id/linearLayoutGeneral"
                    android:layout_width="fill_parent"
                    android:layout_height="wrap_content"
                    android:orientation="vertical">

                    <TextView
                    android:id="@+id/tvText"
                    android:layout_width="fill_parent"
                    android:layout_height="200dp"
                    android:text="Test text" />

                <android.support.v4.view.ViewPager
                            android:id="@+android:id/viewpager"
                            android:layout_width="fill_parent"
                            android:layout_height="fill_parent" >
                </android.support.v4.view.ViewPager>


                </LinearLayout>
</ScrollView>

ViewPager中的每个页面都有这样的布局：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:orientation="vertical" >

    <LinearLayout
        android:id="@+id/layoutData"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical" >
    </LinearLayout>

</LinearLayout>

在这样的页面中

单个元素的布局：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="40dp"
    android:gravity="center"
    android:orientation="vertical"
    android:background="@android:color/white" >

    <TextView
        android:id="@+id/textView"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="Large Text"
        android:background="@android:color/black"
        android:textColor="@android:color/white"
        android:textAppearance="?android:attr/textAppearanceLarge" />

</LinearLayout>

单页片段也非常简单：

public class DayFragment extends Fragment {

    private static final String TAG = DayFragment.class.getSimpleName();

    public String tag;

    LinearLayout data;

    View mView;

    final int ROWS_NUM = 60;

    public DayFragment() {

    }

    /**
     * (non-Javadoc)
     * 
     * @see android.support.v4.app.Fragment#onCreateView(android.view.LayoutInflater,
     *      android.view.ViewGroup, android.os.Bundle)
     */
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
            Bundle savedInstanceState) {

        if (container == null) {
            // We have different layouts, and in one of them this
            // fragment's containing frame doesn't exist. The fragment
            // may still be created from its saved state, but there is
            // no reason to try to create its view hierarchy because it
            // won't be displayed. Note this is not needed -- we could
            // just run the code below, where we would create and return
            // the view hierarchy; it would just never be used.
            return null;
        }

        mView = (LinearLayout) inflater.inflate(R.layout.day, container, false);

        setUpControls();

        generateData();

        String text = getArguments().getString("text");
        Log.d(TAG, "creating view with text: " + text);

        return mView;
    }

    private void setUpControls() {
        data = (LinearLayout) mView.findViewById(R.id.layoutData);
    }

    private void generateData() {
        for (int i = 0; i < ROWS_NUM; i++) {
            View v = createRow(i);
            data.addView(v);
        }
    }

    private View createRow(int num) {
        LayoutInflater inflater = (LayoutInflater) getActivity()
                .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        View v = inflater.inflate(R.layout.row, null);

        TextView tv = (TextView) v.findViewById(R.id.textView);
        tv.setText("Data nr: " + num);

        return v;
    }

    public static DayFragment newInstance(String text) {
        Log.d(TAG, "newInstance with text: " + text);
        DayFragment f = new DayFragment();

        f.tag = text;

        // Supply text input as an argument.
        Bundle args = new Bundle();
        args.putString("text", text);
        f.setArguments(args);

        return f;
    }

}

Answer 1

我遇到ViewPager表现得很奇怪的问题，我发现原因是因为有时ScrollView重新获得焦点而ViewPager失去焦点。如果ViewPager中有ScrollView，并且您希望它在触摸它时始终保持清晰并且ScrollView永远无法获得焦点，那么设置requestDisallowInterceptTouchEvent即可。这有帮助吗？

    mViewPager= (ViewPager) findViewById(R.id.pager);
    mViewPager.setAdapter(adapter);
    mViewPager.setOnTouchListener(new View.OnTouchListener() {

        @Override
        public boolean onTouch(View v, MotionEvent event) {
            mViewPager.getParent().requestDisallowInterceptTouchEvent(true);
            return false;
        }
    });

Answer 2

延伸到Marius的答案，允许父母垂直滚动：

我注意到当你在初始滚动时调用'requestDisallowInterceptTouchEvent'方法时，它会在视图寻呼机顶部垂直滚动时阻止在父视图上垂直滚动。

我的解决方案是在用户开始水平滚动指定距离（'margin'变量）后才触发该方法。

mViewPager.setOnTouchListener(new View.OnTouchListener() {
    public boolean onTouch(View v, MotionEvent e) {
        // How far the user has to scroll before it locks the parent vertical scrolling.
        final int margin = 10;
        final int fragmentOffset = v.getScrollX() % v.getWidth();

        if (fragmentOffset > margin && fragmentOffset < v.getWidth() - margin) {
            mViewPager.getParent().requestDisallowInterceptTouchEvent(true);
        }
        return false;
    }
});

Answer 3

mPager.setOnTouchListener(new View.OnTouchListener() {

    int dragthreshold = 30;
    int downX;
    int downY;

    @Override
    public boolean onTouch(View v, MotionEvent event) {

        switch (event.getAction()) {
        case MotionEvent.ACTION_DOWN:
            downX = (int) event.getRawX();
            downY = (int) event.getRawY();
            break;
        case MotionEvent.ACTION_MOVE:
            int distanceX = Math.abs((int) event.getRawX() - downX);
            int distanceY = Math.abs((int) event.getRawY() - downY);

            if (distanceY > distanceX && distanceY > dragthreshold) {
                mPager.getParent().requestDisallowInterceptTouchEvent(false);
                mScrollView.getParent().requestDisallowInterceptTouchEvent(true);
            } else if (distanceX > distanceY && distanceX > dragthreshold) {
                mPager.getParent().requestDisallowInterceptTouchEvent(true);
                mScrollView.getParent().requestDisallowInterceptTouchEvent(false);
            }
            break;
        case MotionEvent.ACTION_UP:
            mScrollView.getParent().requestDisallowInterceptTouchEvent(false);
            mPager.getParent().requestDisallowInterceptTouchEvent(false);
            break;
        }
        return false;
    }
});

Answer 4

我有同样的问题尝试使用我的代码，我们应该停用垂直滚动并将事件发送到Scrollview：

private int dragThreshold = 10, int downX = 0, int downY = 0;

vPager.setOnTouchListener(new View.OnTouchListener() {
        @Override
        public boolean onTouch(View v, MotionEvent event) {
            if(event.getAction() == MotionEvent.ACTION_DOWN || event.getAction() == MotionEvent.ACTION_UP){
                downX = (int) event.getRawX();
                downY = (int) event.getRawY();
                return false;
            }else if(event.getAction() == MotionEvent.ACTION_MOVE){
                int distanceX = Math.abs((int) event.getRawX() - downX);
                int distanceY = Math.abs((int) event.getRawY() - downY);

                ExceptionHelpers.dLog("OnTouchListener", "distance X : "+distanceX+" , distance Y : "+distanceY);

                if(distanceY > distanceX && distanceY > dragThreshold){
                    v.getParent().requestDisallowInterceptTouchEvent(false);
                    return true;
                }
            }
            v.getParent().requestDisallowInterceptTouchEvent(true);
            return false;
        }
    });

您还可以设置Min Horizontal Scroll By Add：

else {
      distanceX > distanceY && distanceX > dragThreshold)
}

请记住，建筑工人会这样做 - ＆gt;尝试并尝试尝试

开发人员（我们）做 - ＆gt;思考，思考并尝试

Good Lock

Answer 5

试试这个

    public  static class XScrollDetector extends GestureDetector.SimpleOnGestureListener {
        @Override
        public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX, float distanceY) {
        return Math.abs(distanceY) < Math.abs(distanceX);
       }
   }

和viewpager

    final GestureDetector mGestureDetector= new GestureDetector(this,new XScrollDetector());
    mViewPager.setOnTouchListener(new View.OnTouchListener() {
        @Override
        public boolean onTouch(View v, MotionEvent event) {

            mScrollView.requestDisallowInterceptTouchEvent(mGestureDetector.onTouchEvent(event));
            return false;

        }
    });

Answer 6

我已经尝试了很多东西，但是有些东西对我来说没有用，有些东西太复杂了，代码很脏。

我以这种方式解决了ViewPager in ScrollView这个问题。
您可以在ViewPager.onMeasure()或ViewPager.OnPageChangeListener()

中更新viewPager大小

每次ui片段更改时，都会调用方法onMeasure()。但是我有很多不同的ui（例如TabButton），仅当用户滚动页面时才更新视图页面大小。

    mPager.addOnPageChangeListener(new ViewPager.OnPageChangeListener() {
        @Override
        public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
            // will work when ViewPager shows first fragment.
            if (position != currentPosition) {
                currentPosition = position;
                updateViewPagerSize(position);
            }
        }

        @Override
        public void onPageSelected(int position) {

        }

        @Override
        public void onPageScrollStateChanged(int state) {

        }
    });

根据情况，您可能需要集中精力使ScrollView起作用。

public void updateViewPagerSize(int position) {
    View view = mPager.getChildAt(position);
    view.measure(ViewPager.LayoutParams.WRAP_CONTENT, ViewPager.LayoutParams.WRAP_CONTENT);
    LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT, view.getMeasuredHeight());
    mPager.setLayoutParams(params);
    edtText.requestFocus(); //you might have to give a focus something to use scroll.
}

Answer 7

一个Activity中的水平和垂直滚动通常是个问题。 ViewPager可以很好地处理这个问题。我不知道你的问题是否有一个好的解决方案。但我建议摆脱主要布局中的ScrollView和TextView。

使用ViewPager作为布局的起点，并将垂直ScrollView放在ViewPager碎片中。

Answer 8

禁止ScrollView拦截触摸事件。这要求用户在ViewPager外部触摸以向上或向下滚动。

mScrollView = (ScrollView) findViewById(R.id.scroll_view); 
mViewPager= (ViewPager) findViewById(R.id.pager);
mViewPager.setAdapter(adapter);
mViewPager.setOnTouchListener(new View.OnTouchListener() {

    @Override
    public boolean onTouch(View v, MotionEvent event) {
        mScrollView.requestDisallowInterceptTouchEvent(true);
        return false;
    }
});

ScrollView中的ViewPager - 垂直滚动不起作用

8 个答案: