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android – Change checkbox text color when checked

Posted by: admin June 15, 2020 Leave a comment

Questions:

I would like to change color of the text when CheckBox is checked. This is what I have for now:

<CheckBox
    android:id="@+id/checkbox"
    android:layout_width="20dp"
    android:layout_height="20dp"
    android:background="@drawable/states"
    android:gravity="center_horizontal|center_vertical"
    android:button="@null"
    android:text="test/>

Checkbox background is normally changed when checkbox is checked. The problem is text. It’s always the same color. How can I also change text color when checkbox is checked?

This is how I change states for checkbox background (I removed extras because of simplicity):

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

    <item android:state_checked="false">
        <layer-list >
            <item>
                <shape android:shape="oval">
                </shape>
            </item>
        </layer-list>
    </item>

    <item android:state_checked="true" >
        <layer-list >
            <item>
                <shape android:shape="oval">
                </shape>
            </item>
        </layer-list >
    </item>
</selector>
How to&Answers:

You can use selector as well but instead of /res/drawable put it in /res/color.

/res/color/text_my_checked.xml

<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:state_checked="true" android:color="#ffcc00"/> <!-- checked -->
    <item android:color="#ffffff"/> <!-- anything else -->
</selector>

You would get this color as ColorStateList by calling getResources().getColorStateList(R.color.text_my_checked).

EDIT:

Ever since appcompat-v7 24.0.0 we can use theme references in color state lists on platforms down to API 9. This was originally introduced in API 23.

<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:state_checked="true" android:color="?colorControlActivated"/> <!-- checked -->
    <item android:state_checked="true" android:state_enabled="false" app:alpha="?android:disabledAlpha" android:color="?colorControlActivated"/> <!-- checked, disabled -->
    <item android:color="?android:textColorPrimary"/> <!-- anything else -->
</selector>

Call AppCompatResources.getColorStateList(checkbox.getContext(), R.color.text_my_checked) to obtain the color state list.

Answer:

You might do that programmatically, recalling your Checkbox and setting an onCheckedChangeListener.

    CheckBox cb = (CheckBox) findViewById(R.id.checkbox);
    cb.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
        @Override
        public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
            if (isChecked) { buttonView.setTextColor(...) }
            if (!isChecked) { buttonView.setTextColor(...); }
        }
    });