Android：ImageView缩放到ScrollView中的屏幕宽度

Question

I'm quite new to android programming and I stumbled upon a problem with my layout .

At first, I had a Linearlayout with a textview , 2 buttons and a imageview scaled to fit the screen.

Now I wanted to put this under a scrollview , so the imageview could be scaled larger (to the width of the screen).

Without the scrollview everything just went fine, but with the scrollview , my imageview is not scaled anymore.

What am I doing wrong ? I tried numerous solutions on StackOverflow but I can't get it to work with a ScrollView . Thanks in advance!

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

    <TextView
        android:id="@+id/textView1"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_gravity="center_horizontal"
        android:text="@string/pageno" />

    <Button
        android:id="@+id/button1"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_gravity="center_horizontal"
        android:text="@string/texta" />

    <Button
        android:id="@+id/button2"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_gravity="center_horizontal"
        android:text="@string/textb" />

    <ImageView
        android:id="@+id/imageView1"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_gravity="center_horizontal"
        android:adjustViewBounds="true"
        android:scaleType="fitCenter"
        android:src="@drawable/page1" />

</LinearLayout>
</ScrollView>

Answer 1

Make LinearLayout/RelativeLayout as parent view. In that make a scroll view and set alignparentTop=true. This scrollView will contain a single layout in which all other views will be placed.