How do i change the backgroud color of a button in kotlin

Question

I am new to kotlin programming and i can't resolve the problem that i am facing in android studio. I followed a course on youtube, and at one point the video teaches you how to build an actual app. I want to change the backgroud color of a button that i made but whatever i do, the button keeps having the color purple.

I tryed this 2 methods:

android:background="@android:color/white"
android:background="#FFFFFF"

Can you help me guys, i would be really thankful

the entire code is: ( please do not mind the names i chose for the colors, im romanian)

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/padding"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@color/backgroundColor"
android:gravity="center_horizontal"
android:orientation="vertical"
android:padding="16dp"
tools:context=".MainActivity"
>

<Button
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_marginTop="15dp"
    android:background="@android:color/white"
    android:backgroundTint="@color/white"
    android:text="Selecteaza data"
    android:textColor="@color/culoarePrimara"
    android:textSize="20sp"
    android:textStyle="bold"
    />
</LinearLayout>

This is the color: enter image description here

post more code, `Activity` and layout XML especially. where have you put this not-working `android:background` line? — snachmsm, Feb 03 '21 at 13:28
Guys, i do not know what to say, thank you for all the responses, i got pretty mad, deleted the project and re-coded it, using your sugestions and it worked thanks — Cosmin Boeriu, Feb 09 '21 at 11:29
Does this answer your question? [Android button background color](https://stackoverflow.com/questions/18070008/android-button-background-color) (specifically [this answer](https://stackoverflow.com/a/47327294/208273)) or [this question](https://stackoverflow.com/q/29801031/208273) for doing it in Kotlin. — Ryan M, Feb 17 '21 at 04:17

score 0 · Answer 1 · answered Feb 03 '21 at 13:30

0

For button background color either use custom style or android:backgroundTint="@color/white" (or your preferred color)

answered Feb 03 '21 at 13:30

digiwizkid

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i tried it but it doesn't change the color – Cosmin Boeriu Feb 03 '21 at 13:36
Which API level are you using? If it is <21 then use `app:backgroundTint` instead – digiwizkid Feb 03 '21 at 13:40
i used api 27, i belive its android 8.1 – Cosmin Boeriu Feb 03 '21 at 13:46
It's based on whether you're using an AppCompat theme vs. a Material Components theme, not the API level. – Tenfour04 Feb 03 '21 at 14:32

score 0 · Accepted Answer · edited Feb 03 '21 at 16:28

0

instead of android:background="@color/backgroundColor"

use: android:backgroundTint="@color/backgroundColor"

edited Feb 03 '21 at 16:28

Nicola Gallazzi

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answered Feb 03 '21 at 14:57

YZN

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score 0 · Answer 3 · answered Feb 03 '21 at 16:32

0

You can use:

<Button
    app:backgroundTint="@color/..."/>

May be you are using a Theme.MaterialComponents.* theme and the default background color of the Button (which is replaced by a MaterialButton) is the colorPrimary defined in your app theme.

answered Feb 03 '21 at 16:32

Gabriele Mariotti

320,139
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How do i change the backgroud color of a button in kotlin

3 Answers3