I'm doing a list with Chips. I want this chips can be selected, so, taking a look to https://material.io/develop/android/components/chip/ I see I can have a "Choice Chip".
As I need to create and add dynamically I have to configure with specific colors, color ripplem, ...
So what I have to configure it is:
val chip = Chip(context, null, R.style.CustomChipChoice)
chip.isClickable = true
chip.isCheckable = true
chip.isCheckedIconVisible=false
chip.height = ScreenUtils.dpToPx(40)
chip.chipCornerRadius = (ScreenUtils.dpToPx(20)).toFloat()
chip.chipStrokeWidth = (ScreenUtils.dpToPx(2)).toFloat()
chip.setTextAppearanceResource(R.style.ChipTextStyle)
return chip
What I try with R.style.CustomChipChoice
is:
CustomChipChoice style
<style name="CustomChipChoice" parent="@style/Widget.MaterialComponents.Chip.Choice">
<item name="chipBackgroundColor">@color/background_color_chip_state_list</item>
<item name="chipStrokeColor">@color/background_color_chip_state_list</item>
<item name="rippleColor">@color/topic_social_pressed</item>
</style>
background_color_chip_state_list
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:color="@color/topic_social_selected" android:state_checked="true" />
<item android:color="@color/topic_social_pressed" android:state_pressed="true" />
<item android:color="@color/topic_unselected_background" />
</selector>
stroke_color_chip_state_list
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:color="@color/topic_social_pressed" android:state_checked="true"/>
<item android:color="@color/grey_material2" android:state_checked="false"/>
</selector>
As you can see, I make the chip, clickable and checkable (hiding the check icon I don't need).
But when I test it, the colors are not set. The chips just look as default colors (grey's scale)
Where can I apply or how, this custom style?
P.S:
I have done a fast test, to see if my CustomStyle was malformed/etc..
I added a view via xml and worked perfectly...
<android.support.design.chip.Chip
android:id="@+id/test"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
style="@style/CustomChipChoice"
android:checkable="true"
android:clickable="true"
app:checkedIconVisible="false"
android:text="Chip Test"/>
You can't use the constructor val chip = Chip(context, null, R.style.CustomChipChoice)
because the 3rd parameter isn't the style but the attribute in the theme as R.attr.chipStyle
.
The Chip
hasn't a constructor with 4 parameters as other components because it extends AppCompatCheckbox
which does not support a 4 parameter constructor.
However you can use something different.
1st option:
Just use a xml layout (single_chip_layout.xml
) to define the single Chip
with your favorite style:
<com.google.android.material.chip.Chip
xmlns:android="http://schemas.android.com/apk/res/android"
style="@style/CustomChipChoice"
...
/>
with
<style name="CustomChipChoice" parent="@style/Widget.MaterialComponents.Chip.Choice">
...
</style>
Then instead of val chip = Chip(context, null, R.style.CustomChipChoice)
use:
val chip = layoutInflater.inflate(R.layout.single_chip_layout, chipGroup, false) as Chip
In java:
Chip chip =
(Chip) getLayoutInflater().inflate(R.layout.single_chip_layout, chipGroup, false);
2nd option:
Another option is to use the setChipDrawable
method to override the ChipDrawable
inside the Chip
:
Chip chip = new Chip(this);
ChipDrawable chipDrawable = ChipDrawable.createFromAttributes(this,
null,
0,
R.style.Widget_MaterialComponents_Chip_Choice);
chip.setChipDrawable(chipDrawable);
In order to set the chip style in code you can try the following:
val chip = Chip(context)
val drawable = ChipDrawable.createFromAttributes(context, null, 0, R.style.Widget_MaterialComponents_Chip_Choice)
chip.setChipDrawable(drawable)
the CustomChipChoice
is not a style it is just a reference to a style. therefore change R.style.CustomChipChoice
to it : R.attr.CustomChipChoice
val newChip = Chip(context, null, R.attr.CustomChipChoice)
but before it you should add this CustomChipChoice
in values.xml
file in your project.
for this. if your project does not have the values.xml
create it in values
directory.
then add CustomChipChoice
like this.
values.xml
<?xml version="1.0" encoding="utf-8"?>
<resources>
<attr name="CustomChipChoice" format="reference" />
</resources>
now in styles.xml
add your style like this.
styles.xml
<style name="AppTheme" parent="Theme.MaterialComponents.Light.NoActionBar">
.
.
<item name="CustomChipChoice">@style/CustomChipChoiceStyle</item>
.
.
</style>
now that CustomChipChoice
attr references to this style
and now you can create your custom style in styles.xml
file.
styles.xml
<style name="CustomChipChoiceStyle" parent="@style/Widget.MaterialComponents.Chip.Action">
.
<item name="checkedIconVisible">false</item>
<item name="android:focusable">true</item>
<item name="android:clickable">true</item>
<item name="chipBackgroundColor">@color/colorWhite</item>
<item name="chipIcon">@drawable/ic_filter</item>
<item name="chipIconVisible">true</item>
<item name="textStartPadding">0dp</item>
<item name="textEndPadding">0dp</item>
.
.
<item name="android:textAppearance">@style/ChipTextStyleAppearance</item>
</style>
if you want to change text appearance of chip. here is ChipTextStyleAppearance
. you can add it like this.
styles.xml
<style name="ChipTextStyleAppearance">
<item name="android:fontFamily">@font/main_font</item>
<item name="android:textSize">13dp</item>
<item name="android:textColor">#ffffff</item>
</style>
dont forget to add the AppTheme
in androidManifest.xml
on application
or activity
tags.
androidManifest.xml
<application
.
.
android:theme="@style/AppTheme">
<activity
.
.
android:theme="@style/AppTheme" />