Develop Reference

Button background color is not showing in my android activity

I created a calculator activity as a part of a bigger app, and created a theme, and style for different components. yet, when I assign a background color of orange to the "buttonOperator" styles it doesn't show in the activity on the buttons that are using this style, appreciate explaining to me what i did wrong and maybe how/what tools can be used to troubleshoot such layout problems in android studio if such tools or methods are available.
below is the code relevant to the issue:
calculatorActivity.xml
<\?xml version="1.0" encoding="utf-8"?>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#color/light_Black"
android:orientation="vertical"
android:theme="#style/Theme.UnitConverterAdvance.Calculator"
tools:context=".CalculatorActivity">
<LinearLayout style="#style/buttonRow">
<Button
style="#style/buttonNumber"
android:text="#string/button_7" />
<Button
style="#style/buttonNumber"
android:text="#string/button_8" />
<Button
style="#style/buttonNumber"
android:text="#string/button_9" />
<Button
style="#style/buttonOperator"
android:text="#string/button_division" />
</LinearLayout>
<LinearLayout style="#style/buttonRow">
<Button
style="#style/buttonNumber"
android:text="#string/button_0" />
<Button
style="#style/buttonNumber"
android:text="#string/button_dot" />
<Button
style="#style/buttonOperator"
android:text="#string/button_equal" />
<Button
style="#style/buttonOperator"
android:text="#string/button_plus" />
</LinearLayout>
</LinearLayout>
Style.xml
<?xml version="1.0" encoding="utf-8"?>
<resources>
<style name="buttonRow">
<item name="android:layout_weight">1</item>
<item name="android:layout_width">match_parent</item>
<item name="android:layout_height">0dp</item>
</style>
<style name="buttonNumber">
<item name="android:layout_weight">1</item>
<item name="android:layout_width">0dp</item>
<item name="android:layout_height">match_parent</item>
<item name="android:background">#null</item>
<item name="android:textSize">25sp</item>
<item name="android:textColor">#color/white</item>
</style>
<style name="buttonOperator">
<item name="android:layout_weight">1</item>
<item name="android:layout_width">0dp</item>
<item name="android:layout_height">match_parent</item>
<item name="backgroundColor">#color/orange</item>
<item name="android:textSize">25sp</item>
<item name="android:textColor">#color/white</item>
</style>
</resources>
Theme.xml
<resources xmlns:tools="http://schemas.android.com/tools">
<style name="Theme.UnitConverterAdvance" parent="Theme.MaterialComponents.DayNight.DarkActionBar">
<!-- Primary brand color. -->
<item name="colorPrimary">#color/purple_500</item>
<item name="colorPrimaryVariant">#color/purple_700</item>
<item name="colorOnPrimary">#color/white</item>
<!-- Secondary brand color. -->
<item name="colorSecondary">#color/teal_200</item>
<item name="colorSecondaryVariant">#color/teal_700</item>
<item name="colorOnSecondary">#color/black</item>
<!-- Status bar color. -->
<item name="android:statusBarColor" tools:targetApi="l">?attr/colorPrimaryVariant</item>
<!-- Customize your theme here. -->
</style>
<style name="Theme.UnitConverterAdvance.Calculator" parent="Theme.AppCompat">
<!-- Primary brand color. -->
<item name="colorPrimary">#color/light_Black</item>
<item name="colorPrimaryVariant">#color/orange</item>
<item name="colorOnPrimary">#color/white</item>
<!-- Status bar color. -->
<item name="android:statusBarColor" tools:targetApi="l">?attr/colorPrimaryVariant</item>
</style>
</resources>

////Try to give manually in .xml file it. It works fine.
<Button
android:id="#+id/btn_proceToPay"
android:layout_width="match_parent"
android:layout_height="56dp"
android:layout_below="#id/rl3"
android:layout_marginTop="20dp"
android:background="#color/primaryBackgroung"
android:enabled="false"
android:text="Proceed To Pay"
android:textAllCaps="false"
android:textColor="#color/whiteText"
android:textSize="16sp"
android:textStyle="bold" />

as indicated by commonsware in his comment, the answer is in using the backgroundTint instead of the backgroundColor in the Style.xml. or changing 'button' tag into 'android.widget.Button'.
Because since Android Studio 4.1 any Button elements in a layout get turned into MaterialButton widgets, which ignores background attribute.
for more details refer to commonsware answer

Rating bar with custom size

I have to display rating bar with my custom size. But in the case that rating bar with my custom size, the stars disappear in my layout. Can I manage the size of padding and margin the rating bar?
<RatingBar
android:focusable="false"
android:id="#+id/rating_order"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:numStars="5"
android:stepSize="1.0"
android:scaleX="0.3"
android:scaleY="0.3" />

You can try to set the parameters from styles:
<?xml version="1.0" encoding="utf-8"?>
<resources>
<style name="CustomRatingBar" parent="#android:style/Widget.RatingBar" >
<item name="android:numStars">5</item>
<item name="android:stepSize">1.0</item>
<item name="android:layout_width">wrap_content</item>
<item name="android:layout_height">wrap_content</item>
<item name="android:paddingBottom">44dp</item>
<item name="android:layout_marginLeft">4dp</item>
<item name="android:layout_marginTop">4dp</item>
</style>
<resources />
And then in your RatingBar add a style:
style="#style/CustomRatingBar"

popup menu items on listView are not visible

I am using an image button on ListView which shows a popup menu when clicked.
But the problem is that items are not visible.
This is how menu looks.I can see white text on menu in this image but on mobile screen it is invisible.
This is styles.xml
<resources>
<!-- Base application theme. -->
<style name="AppTheme" parent="Theme.AppCompat.Light.NoActionBar">
<item name="colorPrimary">#color/colorPrimary</item>
<item name="colorPrimaryDark">#color/colorPrimaryDark</item>
<item name="colorAccent">#color/colorAccent</item>
<item name="android:colorBackground">#color/colorPrimary</item>
<item name="android:textColorPrimary">#android:color/black</item>
<item name="android:textColorSecondary">#fcfcfc</item>
<item name="android:actionMenuTextColor">#color/black</item>
</style>
<style name="itemTextStyle.AppTheme" parent="#android:style/TextAppearance.Widget.IconMenu.Item">
<item name="android:textColor">#android:color/black</item>
<item name="android:colorBackground">#color/colorPrimary</item>
</style>
<!-- LoginCreateText -->
<style name="LoginCreateText">
<item name="android:textSize">#dimen/login_buttons_text_size</item>
<item name="android:textColor">#android:color/white</item>
<item name="android:layout_margin">2dp</item>
</style>
<!-- LoginCreateTextButton -->
<style name="LoginCreateTextButton">
<item name="android:textSize">#dimen/login_buttons_text_size</item>
<item name="android:textStyle">bold</item>
<item name="android:textColor">#android:color/white</item>
<item name="android:layout_margin">2dp</item>
<item name="android:clickable">true</item>
</style>
<style name="HintText">
<item name="android:textSize">0dp</item>
</style>
<style name="FAB">
<item name="android:layout_margin">0dp</item>
<item name="fabSize">normal</item>
<item name="rippleColor">#android:color/white</item>
<item name="backgroundTint">#color/colorAccent</item>
</style>
<style name="ListItemText">
<item name="android:textColor">#color/light_black</item>
<item name="android:textSize">#dimen/list_item_text_size</item>
<item name="android:layout_margin">2dp</item>
</style>
</resources>
This is themes.xml
<?xml version="1.0" encoding="utf-8"?>
<resources>
<style name="Widget.Button.Login" parent="android:Widget.Button">
<item name="android:paddingLeft">18dp</item>
<item name="android:paddingRight">16dp</item>
<item name="android:textSize">#dimen/login_buttons_text_size</item>
<item name="android:layout_gravity">center</item>
<item name="android:background">#color/colorPrimary</item>
</style>
<style name="Toolbar" parent="#style/Widget.AppCompat.Light.ActionBar">
<item name="android:itemTextAppearance">#style/itemTextStyle.AppTheme</item>
<item name="android:background">#color/colorPrimary</item>
<item name="android:textColorPrimary">#android:color/white</item>
</style>
<style name="CustomTheme.Dialog" parent="Theme.AppCompat.Light.Dialog"/>
</resources>
This is the menu which I am trying to display.
<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:android="http://schemas.android.com/apk/res/android"
app:popupTheme="#style/itemTextStyle.AppTheme">
<item
android:id="#+id/action_edit"
android:title="#string/action_edit" />
<item
android:id="#+id/action_delete"
android:title="#string/action_delete"/>
<item
android:id="#+id/action_assign"
android:title="#string/action_assign"
android:checkable="true"/>
<item
android:id="#+id/action_mark"
android:title="#string/action_mark"
android:enabled="false"/>
</menu>
This is layout file for Quiz Fragment.
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout 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/rl_fragment_quiz_lists"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#color/grey"
app:popupTheme="#style/itemTextStyle.AppTheme"
tools:context=".ui.fragments.QuizFragment">
<include layout="#layout/single_active_list" />
<ListView
android:id="#+id/list_view_active_lists"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:scrollbars="none" />
<android.support.design.widget.FloatingActionButton xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="#+id/fab"
style="#style/FAB"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_alignParentEnd="true"
android:layout_alignParentRight="true"
android:onClick="showAddQuizDialog"
android:src="#drawable/ic_add_quiz"
app:borderWidth="0dp"
app:elevation="6dp"
app:pressedTranslationZ="12dp">
<!--app:rippleColor="#android:color/white" /> -->
</android.support.design.widget.FloatingActionButton>
</RelativeLayout>
This is the layout file of the activity in which this fragment is displayed.
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#color/grey"
android:orientation="vertical">
<android.support.v7.widget.Toolbar xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/app_bar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:theme="#style/Toolbar" />
<android.support.design.widget.TabLayout
android:id="#+id/tab_layout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:theme="#style/Toolbar" />
<android.support.v4.view.ViewPager
android:id="#+id/pager"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</LinearLayout>
I have tried many solutions that were asked before ( all were about toolbar menu) but none worked for me.
I defined a new style in styles.xml
<style name="itemTextStyle.AppTheme" parent="#android:style/TextAppearance.Widget.IconMenu.Item">
<item name="android:textColor">#android:color/black</item>
<item name="android:colorBackground">#color/colorPrimary</item>
and included it in AppTheme which didn't work.then I included it in toolbar style, menu layout, QuizFragment layout but items were still invisible.How to change the background color or item color of menu to fix this, any one will work.

Try this
style.xml
<style name="CustomActionBarTheme" parent="#style/Theme.AppCompat">
<item name="android:actionOverflowButtonStyle">#style/OverflowButton</item>
<item name="actionOverflowButtonStyle">#style/OverflowButton</item>
<item name="windowNoTitle">true</item>
<item name="windowActionBar">false</item>
<item name="android:dropDownListViewStyle">#style/PopupMenuListView</item>
<item name="dropDownListViewStyle">#style/PopupMenuListView</item>
<item name="actionOverflowMenuStyle">#style/OverflowMenu</item>
<item name="actionBarDivider">#null</item>
<!-- OverFlow Menu Text Color -->
<item name="android:textColor">#color/black</item>
</style>
<!-- OverFlow menu Styles -->
<style name="PopupMenuListView" parent="#style/Widget.AppCompat.Light.ListView.DropDown">
<item name="android:divider">#color/black</item>
<item name="android:dividerHeight">1dp</item>
<item name="android:background">#color/white</item>
</style>
<style name="OverflowMenu" parent="Widget.AppCompat.PopupMenu.Overflow">
<!-- Required for pre-Lollipop. -->
<item name="overlapAnchor">false</item>
<!-- Required for Lollipop. -->
<item name="android:overlapAnchor">false</item>
<item name="android:dropDownVerticalOffset">4.0dip</item>
</style>
and define theme for Activity in AndroidManifest.xml
<activity
android:name=".YourActivityName"
android:theme="#style/CustomActionBarTheme"/>

I am using only two themes files (for dark, and day)
Theme.MaterialComponents.DayNight.NoActionBar.Bridge
inside them, I have only items of the same name for both day and night, but in different colors. Found (after experimenting)...that this line is a game-changer in my case (same problem as yours) for title and menu to be white, while at the same time text on popup menu is black
<item name="android:textColorSecondary">#android:color/white</item>
here is the whole file, I used only this, and trying to not hard code anything.
<resources xmlns:tools="http://schemas.android.com/tools">
<!-- Base application theme. -->
<style name="Theme.Ch+++itche+++++" parent="Theme.MaterialComponents.DayNight.NoActionBar.Bridge">
<!-- Primary brand color. -->
<item name="android:textColorSecondary">#android:color/white</item>
<item name="colorPrimary">#color/primaryColor</item>
<item name="colorPrimaryVariant">#color/primaryDarkColor</item>
<item name="colorOnPrimary">#color/primaryLightColor</item>
<item name="colorOnSurface">#color/primaryColorWhiteDay</item>
<item name="android:statusBarColor" tools:targetApi="l">?attr/colorPrimaryVariant</item>
<!-- Customize your theme here. -->
</style>
That is all,
Happy coding,
Nenad

Android v21 no Text in Actionbar

I have no text in my actionbar! What's wrong with this code? There is only a blue background. I tried some different suggestions. If I try it with primary color and so on, there is a shadow which cannot be removed.
style.xml:
<resources xmlns:android="http://schemas.android.com/apk/res/android">
<style name="AppTheme" parent="android:Theme.Material">
<item name="android:colorPrimary">#color/blue</item>
<item name="android:colorPrimaryDark">#color/blue</item>
<item name="android:colorAccent">#color/white</item>
<item name="android:textColor">#color/black</item>
<item name="android:windowBackground">#color/white</item>
<item name="android:actionBarStyle">#style/MyActionBarTheme</item>
</style>
<style name="MyActionBarTheme" parent="AppTheme">
<item name="android:background">#color/blue</item>
<item name="android:textColor">#color/white</item>
<item name="android:textSize">20sp</item>
</style>
</resources>
This is the XML-File:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="#+id/first"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#fff"
android:focusable="true"
android:focusableInTouchMode="true">
<RelativeLayout
android:id="#+id/header"
android:elevation="10dp"
android:background="#color/blue">
...
</RelativeLayout>
<ScrollView>
...
</ScrollView>
</RelativeLayout>

how to call a another layout file inside a styles in android?

i custom the Theme in android Widget.TabWidget android:tablayout
and overide the style of tabwidget in my ownway not using #android because
i want to custom my style of API 10 below same like API11+
<resources>
<!-- Application theme. -->
<style name="AppTheme" parent="AppBaseTheme">
<!-- All customizations that are NOT specific to a particular API-level can go here. -->
</style>
<style name="AppBaseTheme" parent="android:Theme">
<!-- Window -->
<item name="android:windowNoTitle">true</item>
<item name="android:tabWidgetStyle">#style/MyTabWidget</item>
</style>
<!-- TabWidget -->
<style name="MyTabWidget" parent="android:style/Widget.TabWidget">
<item name="android:textAppearance">#style/MyTabWidgetTextAppearance</item>
<item name="android:gravity">center|center</item>
<item name="android:tabLayout"> HOW TO CALL api_1_10_indicator.xml LAYOUT FROM MY RES LAYOUT </item>
</style>
<!-- TabWidget TextAppearance -->
<style name="MyTabWidgetTextAppearance" parent="android:style/TextAppearance.Widget.TabWidget">
<item name="android:textSize">14sp</item>
<item name="android:textStyle">normal</item>
<item name="android:textColor">#color/select_tabwidget_text_color</item>
</style>
</resources>
my res/layout/api_1_10_indicator.xml
<?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="0dip"
android:layout_height="48dip"
android:layout_weight="1"
android:layout_marginStart="-3dip"
android:layout_marginEnd="-3dip"
android:background="#color/api_1_10_tab_indicator">
<ImageView android:id="#+id/icon"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
/>
<TextView android:id="#+id/title"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
style="?android:attr/tabWidgetStyle"
/>
</RelativeLayout>
if i use <item name="android:tablayout">#layout/api_1_10_indicator</item>
its not working icant call my own tablayout for the tabwidget that i custom.
HOW TO DO IT?