Android ScrollView and buttons at bottom of the sc

问题:

I want to implement this: A ScrollView that contains many elements (ImageViews, TextViews, EditTexts etc) and then after the ScrollView some buttons (which are custom ImageViews) that appear always exactly at the bottom of the screen.

If I use the android:fillViewport="true" attribute, then if the elements of the ScrollView are too big to fit in the screen size the buttons get invisible . If I use the android:Weight=1 attribute then the ScrollView gets only 50% of the Screen when the screen is big and it can fit (I want the buttons to take a small percentage, about 10%). If I set the android:Weight to bigger values then the buttons appear very small.

Please help! Maybe it is something simple that I overlooked but I’ve been banging my head for hours!

回答1:

Just created and tested it. Looks like you want.

<?xml version="1.0" encoding="utf-8"?>

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

    <LinearLayout
            android:id="@+id/buttons"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="horizontal"
            android:gravity="center"
            android:layout_alignParentBottom="true">
        <Button
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="Custom Button1"/>
        <Button
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="Custom Button2"/>
    </LinearLayout>

    <ScrollView
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:layout_above="@id/buttons">
         <!--Scrollable content here-->
        <LinearLayout
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:orientation="vertical">                
            <TextView
                    android:layout_height="wrap_content"
                    android:layout_width="wrap_content"
                    android:text="test text"
                    android:textSize="40dp"/>
        </LinearLayout>
    </ScrollView>

</RelativeLayout>

回答2:

<?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="match_parent"
    android:orientation="vertical">
    <ScrollView
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="1">
        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:orientation="vertical">
            <TextView 
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:text="Hello World"
            />
            <TextView 
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:text="Hallo Welt"
            />       
        </LinearLayout>
    </ScrollView>
    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_weight="0">
        <Button
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Go next page"
            android:layout_alignParentRight="true" />
    </RelativeLayout>

</LinearLayout>

回答3:

This worked for me. Give the scroll view a weight of 1. Put all the other widgets following the scroll view in a layout. The scroll view will grow enough to not block the rest.

Widgets in scroll view and rest at bottom

回答4:

scrollview cannot fit the screen because you put it on a linear layout, so linear layout fit in the screen,

just try to make scrollview as root elemen on xml layout

<?xml version="1.0" encoding="utf-8"?>
<ScrollView
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/scrollView1"
    android:layout_width="match_parent"
    android:layout_height="wrap_content" >

    <LinearLayout
        android:id="@+id/linearLayout1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" >
        <!-- Here you can put some XML stuff and BOOM! your screen fit to scrollview -->

    </LinearLayout>
</ScrollView>