android - ScrollView 不显示内容

Question

有人能解释一下为什么 ScrollView 不显示他的子元素吗？我在线性布局垂直内有很多 TextView ，线性布局在 ScrollView 内......

但我没有看到任何 ScrollView 和 TextView ..

这是 XML 布局

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent" >

    <TextView
        android:id="@+id/description"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_above="@+id/scrollViewCheck"
        android:gravity="center"
        android:padding="10dip"
        android:text="Pick which items you want to count"
        android:textAppearance="?android:attr/textAppearanceMedium" >
    </TextView>

    <ScrollView
        android:id="@id/scrollViewCheck"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_above="@+id/bottomSettings"
        android:scrollbarFadeDuration="0" >

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

            <TextView
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:text="Test"
                android:textAppearance="?android:attr/textAppearanceMedium" />

            <TextView
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:text="Test"
                android:textAppearance="?android:attr/textAppearanceMedium" />

            <TextView
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:text="Test"
                android:textAppearance="?android:attr/textAppearanceMedium" />

            <TextView
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:text="Test"
                android:textAppearance="?android:attr/textAppearanceMedium" />

            <TextView
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:text="Test"
                android:textAppearance="?android:attr/textAppearanceMedium" />

            <TextView
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:text="Test"
                android:textAppearance="?android:attr/textAppearanceMedium" />

            <TextView
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:text="Test"
                android:textAppearance="?android:attr/textAppearanceMedium" />

            <TextView
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:text="Test"
                android:textAppearance="?android:attr/textAppearanceMedium" />

            <TextView
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_centerHorizontal="true"
                android:text="Test"
                android:textAppearance="?android:attr/textAppearanceMedium" />

            <TextView
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_centerHorizontal="true"
                android:text="Test"
                android:textAppearance="?android:attr/textAppearanceMedium" />
        </LinearLayout>
    </ScrollView>

    <RelativeLayout
        android:id="@id/bottomSettings"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content" >

        <Button
            android:id="@+id/timeButton"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="Choose Count Time" />

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:layout_below="@id/timeButton"
            android:orientation="horizontal" >

            <Button
                android:layout_width="0dip"
                android:layout_height="wrap_content"
                android:layout_weight="1"
                android:text="Back" />

            <Button
                android:layout_width="0dip"
                android:layout_height="wrap_content"
                android:layout_weight="1"
                android:text="Start" />
        </LinearLayout>
    </RelativeLayout>

</RelativeLayout>

提前致谢;)

Answer 1

View 的问题与底部的 RelativeLayout 有关。这应该可以解决您的问题。将底部的 RelativeLayout 替换为:

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

    <Button
            android:id="@+id/timeButton"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="Choose Count Time" />

    <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:layout_below="@id/timeButton"
            android:orientation="horizontal" >

        <Button
                android:layout_width="0dip"
                android:layout_height="wrap_content"
                android:layout_weight="1"
                android:text="Back" />

        <Button
                android:layout_width="0dip"
                android:layout_height="wrap_content"
                android:layout_weight="1"
                android:text="Start" />

    </LinearLayout>

</LinearLayout>