Question

我有一个包含标题，图像和ExpandableListView的布局。我的问题是，虽然标题不必滚动，但我希望图像和ExpandaleListView是一个可以滚动的唯一块。

直到现在，除非我添加高度值，否则我看不到ExpandibleListView。

这是我的布局代码：

    <?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:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:orientation="vertical">

    <TextView 
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:gravity="center"
        android:text="@string/title"/>

</LinearLayout>

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

    <LinearLayout
                android:id="@+id/userContent"
                android:layout_width="match_parent"
                android:layout_height="175dp"
                android:background="@color/black"
                android:gravity="center_vertical">

                <RelativeLayout
                    android:id="@+id/userDrawer"
                    android:layout_width="match_parent"
                    android:layout_height="match_parent"
                    android:background="@color/transparent" >

                    <ImageView
                        android:id="@+id/ImgDrawer"
                        android:layout_width="match_parent"
                        android:layout_height="match_parent"
                        android:layout_alignParentLeft="true"
                        android:layout_centerVertical="true"
                        android:contentDescription="@string/app_name"
                        android:scaleType="centerCrop"
                        android:src="@drawable/ic_user" />

                </RelativeLayout>
            </LinearLayout>

<ExpandableListView
        android:id="@+id/lvExp"
        android:layout_height="fill_parent"
        android:layout_width="fill_parent"
        android:focusable="false"/>   

</LinearLayout>
</ScrollView>
</LinearLayout>

Answer 1

解决了将图像放入名为“header”的布局中，然后将此代码放入活动中：

final ExpandableListView elv = (ExpandableListView) v.findViewById(R.id.lvExp);
View header = inflater.inflate(R.layout.header, null);
elv.addHeaderView(header);

Answer 2

您的布局文件嵌套太深，您应该删除一些不必要的组，请尝试下面的布局文件：

<?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">

    <TextView 
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:gravity="center"
        android:text="@string/title"/>

    <ScrollView 
                android:layout_width="match_parent"
                android:layout_height="fill_parent"
                android:layout_weight="1"> 
    <LinearLayout
                android:layout_width="match_parent"
                android:layout_height="fill_parent"
                android:orientation="vertical">
                <ImageView
                        android:id="@+id/ImgDrawer"
                        android:layout_width="match_parent"
                        android:layout_height="match_parent"
                        android:layout_alignParentLeft="true"
                        android:layout_centerVertical="true"
                        android:contentDescription="@string/app_name"
                        android:scaleType="centerCrop"
                        android:src="@drawable/ic_user" />

<ExpandableListView
        android:id="@+id/lvExp"
        android:layout_height="wrap_content"
        android:layout_width="fill_parent"
        android:focusable="false"/>   

</LinearLayout>
</ScrollView>
</LinearLayout>

Answer 3

最短和最短的ScrollView问题中ListView的最简单解决方案。

您不必在layout.xml文件中执行任何特殊操作，也不必处理父ScrollView上的任何内容。您只需处理子ListView。您还可以使用此代码在ScrollView＆amp;中使用任何类型的子视图。执行触摸操作。

只需在java类中添加以下代码行：

ListView lv = (ListView) findViewById(R.id.layout_lv);
lv.setOnTouchListener(new OnTouchListener() {
// Setting on Touch Listener for handling the touch inside ScrollView
@Override
public boolean onTouch(View v, MotionEvent event) {
// Disallow the touch request for parent scroll on touch of child view
v.getParent().requestDisallowInterceptTouchEvent(true);
return false;
} 
});

如果将ListView放在ScrollView中，则所有ListView都不会伸展到其全高。以下是解决此问题的方法

/**** Method for Setting the Height of the ListView dynamically.
 **** Hack to fix the issue of not showing all the items of the ListView
 **** when placed inside a ScrollView  ****/
public static void setListViewHeightBasedOnChildren(ListView listView) {
ListAdapter listAdapter = listView.getAdapter();
if (listAdapter == null)
    return;

int desiredWidth = MeasureSpec.makeMeasureSpec(listView.getWidth(), 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, LayoutParams.WRAP_CONTENT));

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

要使用此方法，只需在此方法中传递ListView：

ListView list = (ListView) view.findViewById(R.id.ls);
setListViewHeightBasedOnChildren(list);

与ExpandableListView一起使用

ExpandableListView: view = listAdapter.getView(0, view, listView);
int widthMeasureSpec =    View.MeasureSpec.makeMeasureSpec(ViewGroup.LayoutParams.MATCH_PARENT,   View.MeasureSpec.EXACTLY);
int heightMeasureSpec = View.MeasureSpec.makeMeasureSpec(ViewGroup.LayoutParams.WRAP_CONTENT, View.MeasureSpec.EXACTLY);
view.measure(widthMeasureSpec, heightMeasureSpec);

对于具有可变项目高度的ListView，请使用以下链接

ListView inside ScrollView is not scrolling on Android

同一个滚动视图中的Image和ExpandableListView

3 个答案: