Develop Reference

Toolbar is not showing below API 21 in Android

Toolbar is not showing when run below API 21. Currently, I am running this app it in API 19 emulator.
This same layout works properly in devices running above and equal to API 21.
<?xml version="1.0" encoding="utf-8"?>
<layout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
xmlns:app="http://schemas.android.com/apk/res-auto">
<androidx.coordinatorlayout.widget.CoordinatorLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".pdfScreen.PdfActivity">
<com.google.android.material.appbar.AppBarLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<androidx.appcompat.widget.Toolbar
android:id="#+id/pdf_activity_toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize">
</androidx.appcompat.widget.Toolbar>
</com.google.android.material.appbar.AppBarLayout>
<com.github.barteksc.pdfviewer.PDFView
android:id="#+id/pdfView"
android:layout_width="match_parent"
android:layout_height="match_parent" />
<include
android:id="#+id/include_pdf_menu"
layout="#layout/pdf_activity_bottom_menu"/>
</androidx.coordinatorlayout.widget.CoordinatorLayout>
</layout>
Here is the style.xml
<style name="themeForApp" 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:textColor">#color/textOnPrimary</item>
</style>
<style name="pdfViewTheme" parent="themeForApp.NoActionBar">
</style>
Here is v21/style.xml.
<style name="themeForApp" parent="Theme.MaterialComponents.DayNight.NoActionBar">
<item name="windowActionBar">false</item>
<item name="windowNoTitle">true</item>
<item name="android:statusBarColor">#android:color/transparent</item>
</style>
<style name="pdfViewTheme" parent="themeForApp">
<item name="android:windowFullscreen">true</item>
</style>
Here is the AndroidManifest.xml where I am applying pdfViewTheme to my activity
<activity android:name=".pdfScreen.PdfActivity" android:theme="#style/pdfViewTheme"/>

The issue is the android:layout_height="match_parent"
<com.github.barteksc.pdfviewer.PDFView
android:layout_height="match_parent" />
In this way the PDFView covers the whole screen including the Toolbar with API<21.
The reason is that AppBar/Toolbar has a default elevation and is positioned at higher elevations than others. It doesn't work on API<21.

Buttons are not appearing in a basic Activity

As shown in image no text of "Hello world" and floating action button appear.
I changed my styles.xml
<style name="AppTheme" parent="Base.Theme.AppCompat.Light.DarkActionBar">
<!-- Customize your theme here. -->
<item name="colorPrimary">#color/colorPrimary</item>
<item name="colorPrimaryDark">#color/colorPrimaryDark</item>
<item name="colorAccent">#color/colorAccent</item>
</style>
content_main.xml
<?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:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="#dimen/activity_vertical_margin"
android:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin"
app:layout_behavior="#string/appbar_scrolling_view_behavior"
tools:context="io.sentry.sentry_android_example.MainActivity"
tools:showIn="#layout/activity_main">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Hello World!" />
</RelativeLayout>
activity_main.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"
android:fitsSystemWindows="true"
tools:context="io.sentry.sentry_android_example.MainActivity">
<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/AppTheme.PopupOverlay" />
</android.support.design.widget.AppBarLayout>
<include layout="#layout/content_main" />
<android.support.design.widget.FloatingActionButton
android:id="#+id/fab"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="bottom|end"
android:layout_margin="#dimen/fab_margin"
android:src="#android:drawable/ic_dialog_email" />
</android.support.design.widget.CoordinatorLayout>
As per many comments, I have updated my activity_main.xml, content_main.xml styles.xml
But in design layout, I am still not able to see the buttons and text
And now I am getting errors
1)Render problem Failed to find style 'coordinatorLayoutStyle' in the current theme
2)Render problem Couldn't resolve resource #dimen/activity_horizontal_margin
3)Missing Styles
4)Failed to instantiate one or more class

In the right corner of the screen shot it shows read mark that means you have an error should have to be fixed so please click the read mark and check the error or please post your xml so that i can help you more.

There are something wrong in styles.xml. Use this instead, which is default
<resources>
<!-- Base application theme. -->
<style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
<!-- Customize your theme here. -->
<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="AppTheme.AppBarOverlay" parent="ThemeOverlay.AppCompat.Dark.ActionBar"/>
<style name="AppTheme.PopupOverlay" parent="ThemeOverlay.AppCompat.Light"/>
</resources>
You must be accidentally deleted the resources tag.
And for below issue
Render problem Couldn't resolve resource
#dimen/activity_horizontal_margin
Go to values --> dimens.xml, and add below line in resources tag
<dimen name="activity_vertical_margin">15dp</dimen>
Hope this helped.

This is my style and it works fine please check it out
<style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
<!-- Customize your theme here. -->
<item name="colorPrimary">#color/colorPrimary</item>
<item name="colorPrimaryDark">#color/colorPrimaryDark</item>
<item name="colorAccent">#color/colorAccent</item>
</style>
Here is my screenshot :

How to get systembar tint without overlapping navigation bar in android?

This is my current XML, with which i am getting the above output. How can i get the tint effect without overlapping the drawer?
<android.support.v4.widget.DrawerLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="#+id/drawerLayout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="false"
> <LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:fitsSystemWindows="true"
android:weightSum="1">
<include
android:id="#+id/toolbar"
layout="#layout/toolbar"
/>
</LinearLayout>
<com.heinrichreimersoftware.materialdrawer.DrawerView
android:id="#+id/drawer"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_gravity="start"/>
</android.support.v4.widget.DrawerLayout>
I am using Systembar tint library by ready state softwares to get get transculent status bar on kitkat.

Add this to your theme, this will make your toolbar transparent
<item name="android:windowBackground">#android:color/transparent</item>
Add this in your colors xml for transparent color
<color name="transparent">#00000000</color>

Maybe this can help You:
Place all within a RelativeLayout with android:fitsSystemWindows="true":
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true">
<android.support.v4.widget.DrawerLayout
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="#+id/drawerLayout"
android:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:weightSum="1">
<include
android:id="#+id/toolbar"
layout="#layout/toolbar" />
</LinearLayout>
<com.heinrichreimersoftware.materialdrawer.DrawerView
android:id="#+id/drawer"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_gravity="start"/>
</android.support.v4.widget.DrawerLayout>
</RelativeLayout>
EDIT/CREATE STYLES RESOURCES
/values/styles.xml:
<resources>
<style name="AppTheme" parent="AppTheme.Base"/>
<style name="AppTheme.Base" parent="Theme.AppCompat.NoActionBar">
<item name="colorPrimaryDark">#color/primary_dark</item>
<item name="colorPrimary">#color/primary</item>
<item name="colorAccent">#color/accent</item>
<item name="android:windowBackground">#color/primary_dark</item>
</style>
</resources>
/values-v19/styles.xml: (for Kitkat)
<resources>
<style name="AppTheme" parent="AppTheme.Base">
<item name="android:windowTranslucentStatus">true</item>
</style>
</resources>
/values-v21/styles.xml: (for Lollipop)
<resources>
<style name="AppTheme" parent="AppTheme.Base"/>
<item name="android:colorPrimaryDark">#color/primary_dark</item>
<item name="android:colorPrimary">#color/primary</item>
<item name="android:colorAccent">#color/accent</item>
<item name="android:windowDrawsSystemBarBackgrounds">true</item>
<item name="android:statusBarColor">#android:color/transparent</item>
</style>
</resources>

Android customizing Toolbar for Material Design

I'm trying to implement a Material style ActionBar using toolbar. So far I made a working Material style ActionBar but can't change its icon and text color. I've already set a
Theme.AppCompat.Light.NoActionBar
in style.xml and
android:theme="#style/ThemeOverlay.AppCompat.Dark"
as the toolbar theme.
Is there any way to change the text color and the black icons into the white ones?
Sources are given below,
Toolbar:
<?xml version="1.0" encoding="utf-8"?>
<android.support.v7.widget.Toolbar xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="?attr/colorPrimary"
android:minHeight="?attr/actionBarSize"
android:theme="#style/ThemeOverlay.AppCompat.Dark" >
</android.support.v7.widget.Toolbar>
AppTheme:
<style name="AppTheme" parent="Theme.AppCompat.Light.NoActionBar">
<item name="colorPrimary">#color/ColorPrimary</item>
<item name="colorPrimaryDark">#color/ColorPrimaryDark</item>
</style>
activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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"
android:orientation="vertical"
tools:context="com.example.materialactionabar.MainActivity" >
<include layout="#layout/toolbar" />
<android.support.v4.widget.DrawerLayout
android:id="#+id/drawer_layout"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<FrameLayout
android:id="#+id/container"
android:layout_width="match_parent"
android:layout_height="match_parent" />
<fragment
android:id="#+id/navigation_drawer"
android:name="com.example.materialactionabar.NavigationDrawerFragment"
android:layout_width="240dp"
android:layout_height="match_parent"
android:layout_gravity="start" />
</android.support.v4.widget.DrawerLayout>

In your styles just add as below:
<item name="spinBars">true</item>
<item name="color">#color/white</item>
Complete code as below:
<resources>
<style name="AppTheme" parent="Theme.AppCompat.Light.NoActionBar">
<item name="colorPrimary">#color/ColorPrimary</item>
<item name="colorPrimaryDark">#color/ColorPrimaryDark</item>
<item name="windowActionBar">false</item>
<item name="drawerArrowStyle">#style/DrawerArrowStyle</item>
</style>
<style name="DrawerArrowStyle" parent="Widget.AppCompat.DrawerArrowToggle">
<item name="spinBars">true</item>
<item name="color">#color/white</item>
</style>

transparent Actionbar with AppCompat-v7 21

Is there a way to make the ActionBar transparent in Material Design via Appcompat-v7 21? This is not working unfortunately.
<item name="colorPrimary">#android:color/transparent</item>
Also not the old:
<style name="Widget.Styled.ActionBar" parent="Widget.AppCompat.Light.ActionBar">
<item name="android:background">#android:color/transparent</item>
</style>

<!-- Application theme. -->
<style name="AppTheme" parent="Theme.AppCompat.Light">
<item name="android:actionBarStyle">#style/MyActionBar</item>
<!-- Support library compatibility -->
<item name="actionBarStyle">#style/MyActionBar</item>
</style>
<!-- ACTION BAR STYLES -->
<style name="MyActionBar" parent="#style/Widget.AppCompat.ActionBar">
<item name="android:background">#drawable/actionbar_background</item>
<item name="android:windowActionBarOverlay">true</item>
<!-- Support library compatibility -->
<item name="background">#drawable/actionbar_background</item>
<item name="windowActionBarOverlay">true</item>
</style>

Actually, it's quite easy and simple.
Just ensure that you use RelativeLayout to lay Toolbar and the body.
Put the Toolbar in the last.
Put transparent color for android:background attribute of the Toolbar
This is an example of a working code:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:baselineAligned="false"
android:orientation="vertical">
<fragment
android:id="#+id/fragment_editor"
android:name="ichsan.myapp.HelloFragment"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:layout="#layout/fragment_editor" />
<android.support.v7.widget.Toolbar
android:id="#+id/my_toolbar"
android:layout_height="wrap_content"
android:layout_width="match_parent"
android:minHeight="?attr/actionBarSize"
android:background="#10000000"
app:theme="#style/ThemeOverlay.AppCompat.Dark.ActionBar"
app:popupTheme="#style/ThemeOverlay.AppCompat.Light"/>
</RelativeLayout>
Hope it answers the question.

Step:
1. put below style into v21\styles.xml
<style name="TransperantToolbar" parent="#style/ThemeOverlay.AppCompat.Dark.ActionBar">
<item name="android:windowActionBarOverlay">true</item>
<item name="windowActionBarOverlay">true</item>
</style>
2. Your toolbar xml code
<android.support.v7.widget.Toolbar
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:theme="#style/TransperantToolbar"/>

None of the above did the trick for me (or at least not by themselves)
using appcompat v7 23 and a CoordinatorLayout, which is most likely the culprit. If you are going that route, then you probably have a main activity layout that looks like
<?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:id="#+id/main_content"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.farmdog.farmdog.MainActivity">
<android.support.v4.view.ViewPager
android:id="#+id/container"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_anchor="#+id/appbar"
app:layout_anchorGravity="top"
app:layout_behavior="#string/appbar_scrolling_view_behavior"/>
<android.support.design.widget.AppBarLayout
android:id="#+id/appbar"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<!--android:theme="#style/AppTheme.AppBarOverlay">-->
...
Notice the two layout anchor lines above - those did it for me.