how to decrease radio button size in android

Question

can we decrease the size of radio button in android ??

Answer 1

If you are using radio button then normally it takes image resource from android-sdk e.g . /android-sdk-macosx/platforms/android-10/data/res/drawable-hdpi

If you want to customize it then take the resource from this folder and resize it (I got it of size 34 x 48 which resized to 19 x 24) Then you can use it Like this:

Here is my radio_button.xml

 <?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">

    <item android:drawable="@drawable/btn_radio_on" android:state_checked="true" android:state_pressed="false"/>
    <item android:drawable="@drawable/btn_radio_off" android:state_checked="false" android:state_pressed="false"/>
    <item android:drawable="@drawable/btn_radio_on_pressed" android:state_checked="true" android:state_pressed="true"/>
    <item android:drawable="@drawable/btn_radio_off_pressed" android:state_checked="false" android:state_pressed="true"/>

</selector>

Here is my main.xml

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

    <RadioGroup
        android:layout_width="fill_parent"
        android:layout_height="30dp"
        android:checkedButton="@+id/first"
        android:orientation="horizontal" >

        <RadioButton
            android:id="@+id/first"
            android:button="@drawable/radio_button"
            android:height="20dp"
            android:width="20dp" />

        <RadioButton
            android:id="@+id/second"
            android:button="@drawable/radio_button"
            android:height="20dp"
            android:width="20dp" />

        <RadioButton
            android:id="@+id/third"
            android:button="@drawable/radio_button"
            android:height="20dp"
            android:width="20dp" />

        <RadioButton
            android:id="@+id/fourth"
            android:button="@drawable/radio_button"
            android:height="20dp"
            android:width="20dp" />
    </RadioGroup>

</LinearLayout>

Due to less reputation I am not able to upload images here so I am giving link for resources and output image.

https://www.dropbox.com/sh/7518zf3onh4su0z/fO7CP7o1EY