我有一个android布局,其中有一个带有许多元素的scrollView。在scrollView的底部,我有一个listView,然后由适配器填充。

我遇到的问题是,android是排除listView从scrollView作为scrollView已经有一个可滚动的功能。我希望listView和内容一样长,并且主滚动视图是可滚动的。

我怎样才能实现这种行为呢?

这是我的主要布局:

<ScrollView
    android:id="@+id/scrollView1"
    android:layout_width="match_parent"
    android:layout_height="0dp"
    android:layout_weight="2"
    android:fillViewport="true"
    android:gravity="top" >

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

</ScrollView>

然后,我以编程方式将我的组件添加到linearlayour的id: foodItemActvity_linearLayout_fragments。下面是加载到线性布局中的一个视图。就是这个给我的卷轴带来了麻烦。

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

    <TextView
       android:id="@+id/fragment_dds_review_textView_label"
       android:layout_width="wrap_content"
       android:layout_height="wrap_content"
       android:text="Reviews:"
       android:textAppearance="?android:attr/textAppearanceMedium" />

   <ListView
       android:id="@+id/fragment_dds_review_listView"
       android:layout_width="match_parent"
       android:layout_height="wrap_content">
   </ListView>
</LinearLayout>

我的适配器然后填充这个列表视图。

当我点击主scrollView时,这是一个来自android层级查看器的图像:

如您所见,它排除了评论列表视图。

我应该能够向下滚动页面,看到8个评论,但它只显示了这3个,我可以滚动评论所在的一小部分。我想要一个全局页面滚动


当前回答

找到了一个解决方案scrollview -> viewpager -> FragmentPagerAdapter -> fragment ->动态listview,但我不是作者。虽然有些bug,但至少还能用

public class CustomPager extends ViewPager {

    private View mCurrentView;

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

    public CustomPager(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    @Override
    public void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        if (mCurrentView == null) {
            super.onMeasure(widthMeasureSpec, heightMeasureSpec);
            return;
        }
        int height = 0;
        mCurrentView.measure(widthMeasureSpec, MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED));
        int h = mCurrentView.getMeasuredHeight();
        if (h > height) height = h;
        heightMeasureSpec = MeasureSpec.makeMeasureSpec(height, MeasureSpec.EXACTLY);

        super.onMeasure(widthMeasureSpec, heightMeasureSpec);
    }

    public void measureCurrentView(View currentView) {
        mCurrentView = currentView;
        this.post(new Runnable() {
            @Override
            public void run() {
                requestLayout();
            }
        });
    }

    public int measureFragment(View view) {
        if (view == null)
            return 0;

        view.measure(0, 0);
        return view.getMeasuredHeight();
    }
}


public class MyPagerAdapter extends FragmentPagerAdapter {

    private List<Fragment> fragments;
    private int mCurrentPosition = -1;


    public MyPagerAdapter(FragmentManager fm) {
        super(fm);//or u can set them separately, but dont forget to call notifyDataSetChanged()
        this.fragments = new ArrayList<Fragment>();
        fragments.add(new FirstFragment());
        fragments.add(new SecondFragment());
        fragments.add(new ThirdFragment());
        fragments.add(new FourthFragment());
    }

    @Override
    public void setPrimaryItem(ViewGroup container, int position, Object object) {
        super.setPrimaryItem(container, position, object);
        if (position != mCurrentPosition) {
            Fragment fragment = (Fragment) object;
            CustomPager pager = (CustomPager) container;
            if (fragment != null && fragment.getView() != null) {
                mCurrentPosition = position;
                pager.measureCurrentView(fragment.getView());
            }
        }
    }

    @Override
    public Fragment getItem(int position) {
        return fragments.get(position);
    }

    @Override
    public int getCount() {
        return fragments.size();
    }
}

片段布局可以是任何东西

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent"
android:orientation="vertical"
    android:layout_height="match_parent" tools:context="nevet.me.wcviewpagersample.FirstFragment">


    <ListView
        android:id="@+id/lv1"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:background="#991199"/>
</LinearLayout>

然后在某个地方

lv = (ListView) view.findViewById(R.id.lv1);
        lv.setAdapter(arrayAdapter);
        setListViewHeightBasedOnChildren(lv);
    }

    public static void setListViewHeightBasedOnChildren(ListView listView) {
        ListAdapter listAdapter = listView.getAdapter();
        if (listAdapter == null)
            return;

        int desiredWidth = View.MeasureSpec.makeMeasureSpec(listView.getWidth(),
                View.MeasureSpec.UNSPECIFIED);
        int totalHeight = 0;
        View view = null;
        for (int i = 0; i < listAdapter.getCount(); i++) {
            view = listAdapter.getView(i, view, listView);
            if (i == 0)
                view.setLayoutParams(new ViewGroup.LayoutParams(desiredWidth,
                        LinearLayout.LayoutParams.WRAP_CONTENT));

            view.measure(desiredWidth, View.MeasureSpec.UNSPECIFIED);
            totalHeight += view.getMeasuredHeight();
        }
        ViewGroup.LayoutParams params = listView.getLayoutParams();
        params.height = totalHeight
                + (listView.getDividerHeight() * (listAdapter.getCount() - 1));
        listView.setLayoutParams(params);
        listView.requestLayout();
    }

其他回答

好吧,这是我的答案。固定ListView高度的方法足够封闭,但并不完美。如果大多数项目都是相同的高度,那工作得很好。但如果不是,那就有大问题了。我尝试了很多次,当我输出listItem的值时。getMeasureHeight和listItem。getMeasuerWidth到日志中,我看到宽度值变化很大,这在这里是不期望的,因为同一ListView中的所有项应该具有相同的宽度。问题来了:

有些人使用度量(0,0),这实际上使视图在两个方向上都没有边界,宽度也失控了。有些人尝试获取listView的twidth,但它返回0,没有意义。

当我进一步了解android如何渲染视图时,我意识到所有这些尝试都无法达到我搜索的答案,除非这些函数在视图渲染后运行。

这一次我使用getViewTreeObserver在ListView上,我想固定高度,然后添加ongloballayoutlistener。在这个方法中,我声明了一个新的OnGlobalLayoutListener,在这个方法中,getWidth返回ListView的实际宽度。

private void getLayoutWidth(final ListView lv, final int pad){
        //final ArrayList<Integer> width = new ArrayList<Integer>();

        ViewTreeObserver vto = lv.getViewTreeObserver();
        vto.addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
            @Override
            public void onGlobalLayout() {
                lv.getViewTreeObserver().removeOnGlobalLayoutListener(this);
                //width.add(layout.getMeasuredWidth());
                int width = lv.getMeasuredWidth();
                ListUtils.setDynamicHeight(lv, width, pad);
            }
        });
    }

public static class ListUtils {
        //private static final int UNBOUNDED = View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED);
        public static void setDynamicHeight(ListView mListView, int width, int pad) {
            ListAdapter mListAdapter = mListView.getAdapter();
            mListView.getParent();
            if (mListAdapter == null) {
                // when adapter is null
                return;
            }
            int height = 0;


            int desiredWidth = View.MeasureSpec.makeMeasureSpec(width - 2*pad, View.MeasureSpec.EXACTLY);
            for (int i = 0; i < mListAdapter.getCount(); i++) {
                View listItem = mListAdapter.getView(i, null, mListView);

                listItem.measure(desiredWidth, View.MeasureSpec.UNSPECIFIED);
                //listItem.measure(UNBOUNDED, UNBOUNDED);
                height += listItem.getMeasuredHeight() + 2*pad;
                Log.v("ViewHeight :", mListAdapter.getClass().toString() + " " + listItem.getMeasuredHeight() + "--" + listItem.getMeasuredWidth());
            }
            ViewGroup.LayoutParams params = mListView.getLayoutParams();
            params.height = height + (mListView.getDividerHeight() * (mListAdapter.getCount() - 1));
            mListView.setLayoutParams(params);
            mListView.requestLayout();
        }
    }

value pad,是我在ListView layout中设置的填充。

你可以通过添加android:fillViewport="true"到你的ScrollView解决这个问题。

<ScrollView
      android:layout_width="match_parent"
      android:layout_height="match_parent"
      android:background="@color/white"
      android:fillViewport="true"
      android:scrollbars="vertical">

<ListView
      android:id="@+id/statusList"
      android:layout_width="fill_parent"
      android:layout_height="wrap_content"
      android:animationCache="false"
      android:divider="@null"
      android:scrollingCache="false"
      android:smoothScrollbar="true" />

</ScrollView>

在使用该属性之前,列表视图中只有一个子视图是可见的。使用后,list的所有行或子元素都是可见的。

千万不要把ListView放在ScrollView里面!你可以在谷歌上找到关于这个主题的更多信息。在你的例子中,使用LinearLayout代替ListView并以编程方式添加元素。

It is not possible to use Scroll-view inside List-view as List-view already has scrolling property. To use list-view inside Scroll-view you can follow these steps which worked for me : 1) Create NonScrollListView java file that disable the default scrolling property of list-view. and code is below package your-package-structure; import android.content.Context; import android.util.AttributeSet; import android.view.ViewGroup; import android.widget.ListView; public class NonScrollListView extends ListView { public NonScrollListView(Context context) { super(context); } public NonScrollListView(Context context, AttributeSet attrs) { super(context, attrs); } public NonScrollListView(Context context, AttributeSet attrs, int defStyle) { super(context, attrs, defStyle); } @Override public void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { int heightMeasureSpec_custom = MeasureSpec.makeMeasureSpec( Integer.MAX_VALUE >> 2, MeasureSpec.AT_MOST); super.onMeasure(widthMeasureSpec, heightMeasureSpec_custom); ViewGroup.LayoutParams params = getLayoutParams(); params.height = getMeasuredHeight(); } } 2) Now create xml file which which has NestedScrollView and inside this use NonScrollListView for listing your items. This will make your entire screen to scroll with all the views. <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_weight="1" android:orientation="vertical"> <ViewFlipper android:id="@+id/v_flipper" android:layout_width="match_parent" android:layout_height="130dp"> </ViewFlipper> <TextView android:layout_width="match_parent" android:layout_height="wrap_content" android:text="SHOP" android:textSize="15dp" android:textStyle="bold" android:gravity="center" android:padding="5dp" android:layout_marginTop="15dp" android:layout_marginBottom="5dp" android:layout_marginLeft="8dp" android:layout_marginRight="8dp"/> <View android:layout_width="match_parent" android:layout_height="1dp" android:layout_marginBottom="8dp" android:layout_marginLeft="8dp" android:layout_marginRight="8dp" android:background="#ddd"/> </LinearLayout> <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="vertical" android:layout_weight="1" > <com.abc.xyz.NonScrollListView android:id="@+id/listview" android:divider="@null" android:layout_width="match_parent" android:layout_marginBottom="10dp" android:layout_height="match_parent" android:padding="8dp"> </com.abc.xyz.NonScrollListView> </LinearLayout> <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:gravity="bottom"> <include layout="@layout/footer" /> </LinearLayout> </LinearLayout> 3) Now in java class i.e, home.java define NonScrollListView instead of Listview. package comabc.xyz.landscapeapp; import android.content.Intent; import android.support.annotation.NonNull; import android.support.annotation.Nullable; import android.support.v4.app.Fragment; import android.os.Bundle; import android.support.v4.app.FragmentTransaction; import android.util.Log; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.AdapterView; import android.widget.Button; import android.widget.ImageView; import android.widget.ListView; import android.widget.Toast; import android.widget.Toolbar; import android.widget.ViewFlipper; public class home extends Fragment { int pos = 0; ViewFlipper v_flipper; @Nullable @Override public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) { View view = inflater.inflate(R.layout.activity_home, container, false); return view; } @Override public void onViewCreated(@NonNull final View view, @Nullable Bundle savedInstanceState) { NonScrollListView listView = (NonScrollListView) view.findViewById(R.id.listview); customAdapter customAdapter = new customAdapter(getActivity()); listView.setAdapter(customAdapter); listView.setFocusable(false); customAdapter.notifyDataSetChanged(); listView.setOnItemClickListener(new AdapterView.OnItemClickListener() { @Override public void onItemClick(AdapterView<?> parent, View view, int position, long id) { Log.d("listview click", "onItemClick: "); /* FragmentTransaction fr = getFragmentManager().beginTransaction().replace(R.id.fragment_container, new productdisplay()); fr.putExtra("Position", position); fr.addToBackStack("tag"); fr.commit();*/ Intent intent = new Intent(getActivity(), productdisplay.class); intent.putExtra("Position", position); startActivity(intent); } }); //image slider int images[] = {R.drawable.slide1, R.drawable.slide2, R.drawable.slide3}; v_flipper = view.findViewById(R.id.v_flipper); for (int image : images) { flipperImages(image); } } private void flipperImages(int image) { ImageView imageView = new ImageView(getActivity()); imageView.setBackgroundResource(image); v_flipper.addView(imageView); v_flipper.setFlipInterval(4000); v_flipper.setAutoStart(true); v_flipper.setInAnimation(getActivity(), android.R.anim.slide_in_left); v_flipper.setOutAnimation(getActivity(), android.R.anim.slide_out_right); } } Note: I used Fragments here.

正如其他人已经提到的,不要在ScrollView中使用ListView。

为了解决问题,你可以使用LinearLayout,但仍然要保持整洁-用适配器填充你的LinearLayout,就像你用ListView做的一样

您可以使用这个类作为支持适配器的线性布局替代品

import android.content.Context;
import android.database.DataSetObserver;
import android.util.AttributeSet;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.LinearLayout;

public class AdaptableLinearLayout extends LinearLayout {

private BaseAdapter mAdapter;

private int mItemCount = 0;

private boolean mDisableChildrenWhenDisabled = false;

private int mWidthMeasureSpec;
private int mHeightMeasureSpec;


public AdaptableLinearLayout(Context context, AttributeSet attrs) {
    super(context, attrs);
    // TODO Auto-generated constructor stub
}

public BaseAdapter getAdapter() {
    return mAdapter;
}

public void setAdapter(BaseAdapter adapter) {
    mAdapter = adapter;
    adapter.registerDataSetObserver(new DataSetObserver() {
        @Override
        public void onChanged() {
            updateLayout();
            super.onChanged();
        }

        @Override
        public void onInvalidated() {
            updateLayout();
            super.onInvalidated();
        }
    });
    updateLayout();
}

private void updateLayout() {
    mItemCount = mAdapter.getCount();
    requestLayout();
    invalidate();
}

/**
 * set size for the current View
 */
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
    super.onMeasure(widthMeasureSpec, heightMeasureSpec);
    mWidthMeasureSpec = widthMeasureSpec;
    mHeightMeasureSpec = heightMeasureSpec;

    removeAllViewsInLayout();
    for (int i = 0; i < mItemCount; i++) {
        makeAndAddView(i);
    }
}

private View makeAndAddView(int position) {
    View child;

    // Nothing found in the recycler -- ask the adapter for a view
    child = mAdapter.getView(position, null, this);

    // Position the view
    setUpChild(child, position);

    return child;

}

private void setUpChild(View child, int position) {

    ViewGroup.LayoutParams lp = child.getLayoutParams();
    if (lp == null) {
        lp = generateDefaultLayoutParams();
    }
    addViewInLayout(child, position, lp);

    // Get measure specs
    int childHeightSpec = ViewGroup.getChildMeasureSpec(mHeightMeasureSpec, getPaddingTop() + getPaddingBottom(), lp.height);
    int childWidthSpec = ViewGroup.getChildMeasureSpec(mWidthMeasureSpec, getPaddingLeft() + getPaddingRight(), lp.width);

    // Measure child
    child.measure(childWidthSpec, childHeightSpec);

    int childLeft;
    int childRight;

    // Position vertically based on gravity setting
    int childTop = getPaddingTop() + ((getMeasuredHeight() - getPaddingBottom() - getPaddingTop() - child.getMeasuredHeight()) / 2);
    int childBottom = childTop + child.getMeasuredHeight();

    int width = child.getMeasuredWidth();
    childLeft = 0;
    childRight = childLeft + width;

    child.layout(childLeft, childTop, childRight, childBottom);

    if (mDisableChildrenWhenDisabled) {
        child.setEnabled(isEnabled());
    }
}
}