If you want them to share screen width equally you need to set android:layout_width="match_parent"
on each View
. Your xml would become:
<RadioGroup
android:id="@+id/auton_bar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="@id/clear_fields"
android:orientation="horizontal"
android:paddingLeft="10dp" >
<RadioButton
android:id="@+id/auton_radio_1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:background="@drawable/auton_col" />
<!-- android:layout_marginRight="380dp" -->
<RadioButton
android:id="@+id/auton_radio_2"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:background="@drawable/auton_col" />
<RadioButton
android:id="@+id/auton_radio_3"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:background="@drawable/auton_col" />
</RadioGroup>
To elaborate, layout_weight
can be used in two ways.
- If you have multiple views in a vertical linear layout and you want the last one to take up all the remaining space, you can set their heights to
wrap_content
and give the last view a weight of 1. - If you want all views to share the available space, set all width/heights to
0dp
ormatch_parent
and give each view the same weight value. They will share the space equally.
To have your background drawable scale, make a new xml that goes in your drawable/
folder that looks like this
<?xml version="1.0" encoding="utf-8"?>
<bitmap xmlns:android="http://schemas.android.com/apk/res/android"
android:gravity="center"
android:src="@drawable/auton_col" />
Name it whatever you like (e.g. auton_col_scale.xml) and reference that drawable as your background.