C. Kloost C. Kloost - 6 days ago 6
Java Question

How can I make a HorizontalScrollView's child's child have the width of the screen?

So I've got a LinearLayout, that has the layout_width set to "match_parent", let's call that A.

Then there's a HorizontalScrollView within that, let's call that B.

Then there's a RelativeLayout within that, that I am using because of the rule that only allows 1 direct child int he scroll view, lets call that C.

Then within that I have multiple RelativeLayouts that I want to make the same width as A, alongside each other. Please help me with how I can accomplish this!

Here is the XML code:

<LinearLayout
android:id="@+id/activity_main"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@android:color/white"
android:orientation="vertical" >


<HorizontalScrollView
android:id="@+id/scrollView"
android:layout_width="match_parent"
android:layout_height="0dp"
android:fillViewport="true"
android:layout_weight="9">

// Used because ScrollView can have only 1 child.
<RelativeLayout
android:id="@+id/directChild"
android:layout_width="wrap_content"
android:layout_height="match_parent">

// This is the RelativeLayout that I want to fill the screen width with.
<RelativeLayout
android:id="@+id/howToMakeScreenWidth"
android:layout_width="385dp"
android:layout_height="match_parent">

Answer

Find width of screen using below utility method.

Display display = getWindowManager().getDefaultDisplay();
Point size = new Point();
display.getSize(size);
int width = size.x;

then assign that width to your child RelativeLayout

RelativeLayout.LayoutParams relParams = new RelativeLayout.LayoutParams(
                width, ViewGroup.LayoutParams.WRAP_CONTENT);
yourRelativeLayout.setLayoutParams(relParams);
Comments