How to change AppCompat v21 toolbar theme programmatically?

Question

This is my toolbar xml

<?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"     app:contentInsetEnd="0dp"     app:contentInsetStart="0dp"     android:layout_height="@dimen/toolbar_height"     app:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar"     app:popupTheme="@style/ThemeOverlay.AppCompat.Light"     android:background="@color/primary_color">    </android.support.v7.widget.Toolbar> 

I want to change app:theme programmatically. How do i do this?

Answer 1

Use the following code snippet to add a theme:

Toolbar toolbar; toolbar.getContext().setTheme(R.style.ThemeOverlay_AppCompat_Dark_ActionBar); 

Answer 2

You can do this programmatically or with style:

Toolbar toolbar; // your toolbar toolbar.setBackgroundColor(newColor); // i don't tested this method. Write if it's not working toolbar.setTitleTextColor(titleColor); // if toolbar is white set title to black, if toolbar is black set title to white 

Or you can do it with style:

Add attrs.xml:

<?xml version="1.0" encoding="utf-8"?> <resources>     <attr name="toolbarStyle" format="reference"/> </resources> 

And now change toolbar.xml:

<?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"     app:contentInsetEnd="0dp"     app:contentInsetStart="0dp"     android:layout_height="@dimen/toolbar_height"     app:theme="?attr/toolbarStyle"     app:popupTheme="@style/ThemeOverlay.AppCompat.Light"     android:background="@color/primary_color">    </android.support.v7.widget.Toolbar> 

And in styles.xml (if you don't have this create it):

<?xml version="1.0" encoding="utf-8"?> <resources>     <style name="MyStyle.Dark" parent="AppCompat.Theme">         <item name="toolbarStyle">@style/ThemeOverlay.AppCompat.Dark.ActionBar</item>     </style>     <style name="MyStyle.Light" parent="AppCompat.Theme.Light">         <item name="toolbarStyle">@style/ThemeOverlay.AppCompat.Light.ActionBar</item>     </style> </resources> 

If you select second method (with styles) you must restart activity and use setTheme method before super.onCreate()

I hope I helped you.