Having an issue coloring custome xml button

问题

I'm having an issue coloring a custom button. For some reason, it seems like no matter what coloring change I want to apply (text or background) the button remains the same.

I notice the button.xml has the desired color and the right shape though it doesn't appear the button background-color property on the activity

the button from an activity

   <Button
        android:id="@+id/button2"
        android:layout_width="162dp"
        android:layout_height="53dp"
        android:background="@drawable/button"
        android:text="@string/button"
        android:textAllCaps="false"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.132"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="@+id/messagTextView"
        app:layout_constraintVertical_bias="0.804" />

custome button shape

<?xml version="1.0" encoding="utf-8"?>
<shape android:shape="rectangle" xmlns:android="http://schemas.android.com/apk/res/android">
    <corners android:radius="50sp"/>
    <solid android:color="@color/redAdobeXD"/>
</shape>

回答1:

If you are using material components (which is probably the case if this is a relatively new project) then you style the Button in another way:

<androidx.constraintlayout.widget.ConstraintLayout 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:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@color/white"
    tools:context=".FirstFragment">

    <Button
        android:id="@+id/button"
        style="@style/Widget.MaterialComponents.Button"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_margin="32dp"
        android:text="I am a Button!"
        android:textColor="@color/white"
        app:backgroundTint="#FF0000"
        app:cornerRadius="50dp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

</androidx.constraintlayout.widget.ConstraintLayout>

Things to notice are:

style="@style/Widget.MaterialComponents.Button"
android:textColor="@color/white"
app:backgroundTint="#FF0000" (would be @color/redAdobeXD in your case)
app:cornerRadius="50dp"

There is no need for an extra xml and setting that on the button etc. (only in more custom cases).

You can read more about available options on the ContainedButton here

来源：https://stackoverflow.com/questions/65202859/having-an-issue-coloring-custome-xml-button

标签

android

android-button