Develop Reference

Quastion aboud FloatingActionButton (diamond)

I trying to make FAB with diamond shape.
A lot of articles is saying the same:
Ok, let's go to my code:
<com.google.android.material.floatingactionbutton.FloatingActionButton
android:id="#+id/addCost"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
app:layout_anchor="#id/bottomAppBar"
app:shapeAppearance="#style/FabDiamondOverlay"
android:src="#drawable/baseline_add_white_24"/>
<com.google.android.material.bottomappbar.BottomAppBar
android:id="#+id/bottomAppBar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
style="#style/BottomAppBarTheme"
android:layout_gravity="bottom"
app:fabCradleMargin="10dp"/>
And the result is:
Whats wrong with this FAB ? Why it is circle instead of diamond shape ? It should be diamond, like examples in all articles all over Internet
My stile file looks like:
<resources xmlns:tools="http://schemas.android.com/tools">
...
<style name="FabDiamondOverlay" parent="">
<item name="cornerFamily">cut</item>
<item name="cornerSize">8dp</item>
</style>
<style name="BottomAppBarTheme" parent="Widget.MaterialComponents.BottomAppBar.Colored">
<item name="android:itemBackground">#android:color/black</item>
</style>
</resources>
Currently the shape theming attributes doesn't affect the BottomAppBar and you can only have rounded corners for the FAB cradle.
All layout file:
<?xml version="1.0" encoding="utf-8"?>
<androidx.coordinatorlayout.widget.CoordinatorLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
xmlns:app="http://schemas.android.com/apk/res-auto"
tools:context=".presantation.FragmentCost">
<!-- TODO: Update blank fragment layout -->
<com.google.android.material.floatingactionbutton.FloatingActionButton
android:id="#+id/addCost"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
app:layout_anchor="#id/bottomAppBar"
app:shapeAppearance="#style/FabDiamondOverlay"
android:src="#drawable/baseline_add_white_24"/>
<com.google.android.material.bottomappbar.BottomAppBar
android:id="#+id/bottomAppBar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
style="#style/BottomAppBarTheme"
android:layout_gravity="bottom"
app:fabCradleMargin="10dp"/>
</androidx.coordinatorlayout.widget.CoordinatorLayout>
Maybe the problem in theme file
<resources xmlns:tools="http://schemas.android.com/tools">
<!-- Base application theme. -->
<style name="Theme.SplitCost" parent="Theme.MaterialComponents.DayNight.NoActionBar">
<!-- 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.SplitCost.NoActionBar">
<item name="windowActionBar">false</item>
<item name="windowNoTitle">true</item>
</style>
<style name="Theme.SplitCost.AppBarOverlay" parent="ThemeOverlay.AppCompat.Dark.ActionBar" />
<style name="Theme.SplitCost.PopupOverlay" parent="ThemeOverlay.AppCompat.Light" />
<style name="FabDiamondOverlay" parent="">
<item name="cornerFamily">cut</item>
<item name="cornerSize">8dp</item>
</style>
<style name="BottomAppBarTheme" parent="Widget.MaterialComponents.BottomAppBar.Colored">
<item name="android:itemBackground">#android:color/black</item>
</style>
</resources>

Sorry! It is a bug of Android Studio. On real device this button is diamond !
If someone have a problem like it, don't worry/ Don't trust Android Studio Preview !

Toolbar going underneath status bar both in Activity and Fragment android

I want to achieve a transparent status bar in pre lollipop and above lollipop as well. My minimumSdkLevel is 19. I have tried the following method to achieve transparent statusbar. But the toolbar is going underneath statusbar.
Here is the screenshot (This is a Full screen Fragment with Toolbar on it):
Layout of the above screenshot:
<?xml version="1.0" encoding="utf-8"?>
<android.support.v7.widget.CardView xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:clickable="true"
app:cardCornerRadius="3dp"
android:fitsSystemWindows="true"
app:cardElevation="3dp">
<RelativeLayout
android:id="#+id/gamesLayout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<android.support.design.widget.AppBarLayout
android:id="#+id/toolbarLayout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:theme="#style/AppTheme.AppBarOverlay">
<android.support.v7.widget.Toolbar
android:id="#+id/gameToolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:background="?attr/colorPrimary"
app:popupTheme="#style/AppTheme.PopupOverlay" />
</android.support.design.widget.AppBarLayout>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_below="#+id/toolbarLayout">
<ImageView
android:layout_width="200dp"
android:layout_height="200dp"
android:adjustViewBounds="true"
android:alpha="0.3"
android:scaleType="fitXY"
android:src="#drawable/background_img" />
<ImageView
android:layout_width="200dp"
android:layout_height="200dp"
android:layout_alignParentBottom="true"
android:layout_alignParentRight="true"
android:adjustViewBounds="true"
android:alpha="0.3"
android:rotation="180"
android:scaleType="fitXY"
android:src="#drawable/background_img" />
<android.support.v7.widget.RecyclerView
android:id="#+id/gameList"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_margin="10dp" />
</RelativeLayout>
</RelativeLayout>
</android.support.v7.widget.CardView>
Here is my styles.xml:
<!-- Base application theme. -->
<style name="AppTheme" parent="Theme.AppCompat.NoActionBar">
<!-- Customize your theme here. -->
<item name="colorPrimary">#color/colorPrimary</item>
<item name="colorPrimaryDark">#color/colorPrimaryDark</item>
<item name="colorAccent">#color/colorAccent</item>
<item name="android:colorBackgroundCacheHint">#null</item>
<item name="android:windowTranslucentStatus">true</item>
<item name="android:windowTranslucentNavigation">true</item>
<item name="android:windowAnimationStyle">#android:style/Animation</item>
</style>
Here is my v21/styles.xml :
<!-- Base application theme. -->
<style name="AppTheme" parent="Theme.AppCompat.Light.NoActionBar">
<!-- Customize your theme here. -->
<item name="android:colorPrimary">#color/colorPrimary</item>
<item name="android:colorPrimaryDark">#color/colorPrimaryDark</item>
<item name="android:colorAccent">#color/colorAccent</item>
<item name="android:windowContentTransitions">true</item>
<item name="android:windowTranslucentStatus">true</item>
<item name="android:windowDrawsSystemBarBackgrounds">true</item>
<item name="android:windowTranslucentNavigation">true</item>
</style>
I have even added android:fitsSystemWindows="true" to the root layout of the Activities and Fragments.
I have added this below code as well in the Activities and Fragments:
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
Window window = getWindow();
window.setFlags(WindowManager.LayoutParams.FLAG_LAYOUT_NO_LIMITS, WindowManager.LayoutParams.FLAG_LAYOUT_NO_LIMITS);
}
Why I am not getting transparent Statusbar and why Toolbar is going underneath Statusbar?

in default style.xml
<!-- Base application theme. -->
<style name="BGTheme" parent="Theme.AppCompat.Light.NoActionBar">
<!-- Customize your theme here. -->
<item name="colorPrimary">#color/colorPrimary</item>
<item name="colorAccent">#color/colorAccent</item>
<item name="colorPrimaryDark">#color/colorPrimaryDark</item>
</style>
<style name="BGTheme.ActionBar.Transparent" parent="BGTheme">
<item name="android:windowContentOverlay">#null</item>
<item name="windowActionBarOverlay">true</item>
<item name="windowActionBar">false</item>
<item name="colorPrimary">#android:color/transparent</item>
<item name="android:textColorSecondary">#color/white</item>
</style>
<style name="BGTheme.ActionBar.Transparent.AppBarOverlay"
parent="ThemeOverlay.AppCompat.Dark.ActionBar" />
<style name="BGTheme.ActionBar.Transparent.PopupOverlay"
parent="ThemeOverlay.AppCompat.Light" />
and in your v-21 style.xml
<style name="BGTheme.ActionBar.Transparent" parent="BGTheme">
<item name="colorPrimary">#android:color/transparent</item>
</style>
Note: Add this in your root layout android:fitsSystemWindows="true"

remove if statment
not work below 21
getWindow().setFlags(WindowManager.LayoutParams.FLAG_LAYOUT_NO_LIMITS,WindowManager.LayoutParams.FLAG_LAYOUT_NO_LIMITS);

add flowing lines in your 'style.xml'
<item name="android:windowContentOverlay">#null</item>
<item name="windowActionBarOverlay">true</item>
<item name="windowActionBar">false</item>
<item name="colorPrimary">#android:color/transparent</item>

EDIT:
try Using the following Line in your Base View.
android:fitsSystemWindows="true"
as it is mention also
android:fitsSystemWindows is an
internal attribute to adjust view layout based on system windows such
as the status bar. If true, adjusts the padding of this view to leave
space for the system windows. Will only take effect if this view is in
a non-embedded activity.
Must be a boolean value, either "true" or "false".
This may also be a reference to a resource (in the form
"#[package:]type:name") or theme attribute (in the form
"?[package:][type:]name") containing a value of this type.
This corresponds to the global attribute resource symbol
fitsSystemWindows.
You can also use it globally by using the below line in your theme
<item name="android:fitsSystemWindows">true</item>
I hope it helps. It works in my Project.

Activity's status bar color is different for no apparent reason

I've created a new activity and for some reason, when it is used, it uses a different color in the status bar. What's strange is that in the "design" preview it renders the correct color.
Below are two screen shots, the darker color is the correct color.
Incorrect
Correct
The themes are the same as the other .xml layouts, so I'm having trouble really figuring out where this error is coming from. Below is the code for the layout:
activity_menu.xml
<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout 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"
tools:context="com.brewguide.android.coffeebrewguide.MenuActivity">
<android.support.design.widget.AppBarLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:theme="#style/AppTheme.AppBarOverlay">
<android.support.v7.widget.Toolbar
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:background="?attr/colorPrimary"
app:popupTheme="#style/ThemeOverlay.AppCompat.Dark.ActionBar"
/>
</android.support.design.widget.AppBarLayout>
<LinearLayout
android:id="#+id/myfragment"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
</LinearLayout>
</android.support.design.widget.CoordinatorLayout>
I'm not sure what other code would be useful to include for diagnosing this.
Edit:
styles.xml
<!-- Base application theme. -->
<style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
<!-- Customize your theme here. -->
<item name="drawerArrowStyle">#style/DrawerArrowStyle</item>
<item name="colorPrimary">#color/colorPrimary</item>
<item name="colorPrimaryDark">#color/colorPrimaryDark</item>
<item name="colorAccent">#color/colorAccent</item>
</style>
<style name="AppTheme.NoActionBar">
<item name="windowActionBar">false</item>
<item name="windowNoTitle">true</item>
</style>
<style name="DescriptionTextView">
<item name="android:textColor">#color/colorPrimaryDark</item>
<item name="android:background">#color/mainBackground</item>
</style>
<!--style for the start button in the clock view layout-->
<style name="AppTheme.Button.Start" parent="Widget.AppCompat.Button.Colored">
<item name="colorButtonNormal">#color/complimentaryLeft</item>
<item name="android:textColor">#color/cardview_dark_background</item>
</style>
<!--style for the stop button in the clock view layout-->
<style name="AppTheme.Button.Stop" parent="Widget.AppCompat.Button.Colored">
<item name="colorButtonNormal">#color/colorPrimary</item>
<item name="android:textColor">#color/cardview_dark_background</item>
</style>
<!--style for the reset button in the clock view layout-->
<style name="AppTheme.Button.Reset" parent="Widget.AppCompat.Button.Colored">
<item name="colorButtonNormal">#color/colorAccent</item>
<item name="android:textColor">#color/cardview_light_background</item>
</style>
<style name="AppTheme.AppBarOverlay" parent="ThemeOverlay.AppCompat.Dark.ActionBar" />
<style name="AppTheme.PopupOverlay" parent="ThemeOverlay.AppCompat.Light" />
<style name="DrawerArrowStyle" parent="Widget.AppCompat.DrawerArrowToggle">
<item name="spinBars">true</item>
<item name="color">#android:color/white</item>
</style>

I had the same issue. For me it was an issue with a second styles.xml file (still not sure why I had two). The specific line that was causing the issue was:
<item name="android:statusBarColor">#android:color/transparent</item>
I don't see this in your posted styles.xml, but perhaps it will help someone else.

Check your colors.xml for color named primary_dark and change it to be the same to primary, because Android use that(primary_dark) color to colorize status bar.

Managed to programatically set the color using the following line:
getActivity().getWindow().setStatusBarColor(ContextCompat.getColor(context, R.color.colorPrimaryDark));
I would prefer to have this done in the .xml however.

Text background issue on Toolbar

When adding some alpha to my Toolbar background color, I notice there is a background applied to the title's TextView:
Here is my layout:
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:background="#0099cc">
<android.support.v7.widget.Toolbar
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
app:theme="#style/FullscreenActionBarStyle"
app:titleTextAppearance="#style/ActionBarTitle"/>
<ImageView
android:id="#+id/fullscreen_content"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:src="#drawable/image"/>
</FrameLayout>
And my styles.xml:
<resources>
<!-- Base application theme. -->
<style name="AppTheme" parent="Theme.AppCompat.Light.NoActionBar">
<!-- Customize your theme here. -->
<item name="colorPrimary">#color/colorPrimary</item>
<item name="colorPrimaryDark">#color/colorPrimaryDark</item>
<item name="colorAccent">#color/colorAccent</item>
<item name="android:windowActionBar">false</item>
<item name="windowActionBar">false</item>
</style>
<style name="FullscreenTheme" parent="AppTheme">
<item name="android:windowBackground">#null</item>
<item name="metaButtonBarStyle">?android:attr/buttonBarStyle</item>
<item name="metaButtonBarButtonStyle">?android:attr/buttonBarButtonStyle</item>
<item name="android:actionBarStyle">#style/FullscreenActionBarStyle</item>
<item name="android:windowActionBarOverlay">true</item>
<!--For compatibility-->
<item name="actionBarStyle">#style/FullscreenActionBarStyle</item>
<item name="windowActionBarOverlay">true</item>
</style>
<style name="FullscreenActionBarStyle" parent="Widget.AppCompat.ActionBar">
<item name="background">#color/black_overlay</item>
<item name="android:background">#color/black_overlay</item>
</style>
<style name="ActionBarTitle" parent="TextAppearance.Widget.AppCompat.Toolbar.Title">
<item name="android:textSize">50sp</item>
</style>
</resources>
"black_overlay" color value is #66000000
I am using AppCompat and Support libraries v24.2.1.
Do you have any idea on how to get rid of this text background?
Cheers.

As you can see in the following issue, the problem comes from the attribute app:theme. It is applied to every view that a viewgroup inflate.
Replace app:theme by style:
<android.support.v7.widget.Toolbar
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
style="#style/FullscreenActionBarStyle"
app:titleTextAppearance="#style/ActionBarTitle"/>

Alright, removing the background properties on the FullscreenActionBarStyle style and putting it in the Toolbar layout definition make it work.
As #apelsoczi pointed out, settings these properties in the toolbar style also apply them on children components.

Encapsulate a TextView inside the Toolbar and set the value of that.
<android.support.v7.widget.Toolbar
...>
<TextView ... />
</android.support.v7.widget.Toolbar>

How to remove background of action menu item?

I have got the following action menu:
As you can see all of these action menu items are having a
background. i guess it is the same background like the parent.
How can i remove this background?
My style.xml is the following:
<resources xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools">
<style name="AppTheme" parent="AppTheme.Base"></style>
<style name="AppTheme.Base" parent="Theme.AppCompat.Light.NoActionBar">
<item name="colorPrimaryDark">#color/primaryColorDark</item>
<item name="colorPrimary">#color/primaryColor</item>
<item name="colorAccent">#color/accentColor</item>
<item name="android:textColorPrimary">#color/textcolorsecundary</item>
<item name="android:textColorSecondary">#color/textcolorsecundary</item>
<item name="android:actionModeBackground">#color/primaryColor</item>
<item name="android:windowActionModeOverlay">true</item>
<item name="android:activatedBackgroundIndicator">#drawable/custom_background_listview_item</item>
</style>
<style name="AppTheme.Toolbar" parent="ThemeOverlay.AppCompat.Dark.ActionBar">
<item name="android:textColorPrimary">#color/textcolorsecundary</item>
<item name="actionMenuTextColor">#color/textcolorsecundary</item>
<item name="android:textColorSecondary">#color/textcolorsecundary</item>
<item name="android:showDividers">beginning</item>
<item name="android:divider">#color/primaryColorDark</item>
<item name="android:background">#drawable/custom_background_blue</item>
</style>
<style name="AppTheme.Toolbar.PopupMenu" parent="ThemeOverlay.AppCompat.Dark">
<item name="android:popupBackground">#color/primaryColor</item>
</style>
</resources>
My Toolbar:
<?xml version="1.0" encoding="utf-8"?>
<android.support.v7.widget.Toolbar xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?android:attr/actionBarSize"
android:elevation="2dp"
android:focusable="false"
app:popupTheme="#style/AppTheme.Toolbar.PopupMenu"
app:theme="#style/AppTheme.Toolbar" >
<TextView
android:id="#+id/toolbar_title"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="start"
android:background="#null"
android:textColor="#color/white"
android:textSize="20sp"
android:textStyle="bold" />
</android.support.v7.widget.Toolbar>

The following line is the problem
<style name="AppTheme.Toolbar" parent="ThemeOverlay.AppCompat.Dark.ActionBar">
<item name="android:background">#drawable/custom_background_blue</item>
</style>
Since the above is applied not as style but as a theme (presumably via popupTheme attribute on your Toolbar element), all the widgets inside the toolbar inherit these settings. What you want is android:popupBackground instead of android:background.
Edit: OP stated the above is not sufficient. For styling toolbar's popup menu (not the toolbar itself) use the app:popupTheme attribute. The theme is going to be similar to this:
<style name="AppTheme.Toolbar.PopupMenu" parent="ThemeOverlay.AppCompat.Dark">
<item name="android:popupBackground">#drawable/custom_background_blue</item>
</style>

You're setting the action background color explicitly in your style.xml same as the primary color.
<item name="android:actionModeBackground">#color/primaryColor</item>
Try removing this from your XML or changing it to a color that seems appropriate for your UI and it should work. If you don't choose to manually specify a color for the android:actionModeBackground, it will simple derive it's default value from the parent theme (in your case, Theme.AppCompat.Light.NoActionBar).