You need to use a Theme.AppCompat theme error, even with theme set to AppCompat

Question

I am busy trying to implement The support library so that i can make use of AppCompatActivty

As far as I know I have everything in the correct place. But I am still getting the error.

styles.xml

<resources>        
    <style name="AppBaseTheme" parent="Theme.AppCompat.Light">            
    </style>

    <!-- Application theme. -->
    <style name="AppTheme" parent="AppBaseTheme">
        <item name="colorPrimary">@color/colorPrimary</item>
        <item name="colorPrimaryDark">@color/colorPrimaryDark</item>
        <item name="colorAccent">@color/colorAccent</item>
    </style>       
</resources>

v21/styles.xml

<?xml version="1.0" encoding="utf-8"?>
<resources>
<style name="AppBaseTheme" parent="Theme.AppCompat.Light"></style>

<style name="AppTheme" parent="AppBaseTheme">
    <!-- All customizations that are NOT specific to a particular API-level can go here. -->
    <item name="colorPrimary">@color/colorPrimary</item>
    <item name="colorPrimaryDark">@color/colorPrimaryDark</item>
    <item name="colorAccent">@color/colorAccent</item>
</style>     
</resources>

manifest.xml

  <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher_on"
        android:label="@string/app_name"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">

activity.java

public class RegisterActivity extends AppCompatActivity

Now when I run my application and try open RegisterActivty I get the following error.

 java.lang.RuntimeException: Unable to start activity ComponentInfo{com.tuta_me/activities.RegisterActivity}: java.lang.IllegalStateException: You need to use a Theme.AppCompat theme (or descendant) with this activity.

I must have missed something somewhere. What am I doing wrong?

score 1 · Answer 1 · answered Dec 19 '15 at 12:30

1

Add this

<style name="AppBaseTheme" parent="Theme.AppCompat.Light">            
</style>

in your v21/styles.xml file. Without it, <style name="AppTheme" parent="AppBaseTheme"> has no meaning.

answered Dec 19 '15 at 12:30

Mohammed Aouf Zouag

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Does it not extend the AppBaseTheme from the standard styles.xml – Zapnologica Dec 19 '15 at 12:32
No it does not. Each `styles.xml` file for each **API level**. – Mohammed Aouf Zouag Dec 19 '15 at 12:33
did that, and still getting the error. I have edited the v21 styles block in my initial question to reflect how it is now with your addition. – Zapnologica Dec 19 '15 at 12:35
Can you update your question with the whole **manifest.xml** file ? – Mohammed Aouf Zouag Dec 19 '15 at 12:36
Just post it, so that we could take a look. – Mohammed Aouf Zouag Dec 19 '15 at 12:39

score 0 · Answer 2 · answered Dec 12 '18 at 19:02

Look at this, maybe helps: https://stackoverflow.com/a/53749686/6883143 This answer looks like:

I have same problem when I've migrate to androidx. I've solve this by simply updating from

implementation 'androidx.appcompat:appcompat:1.0.0'

to

implementation 'androidx.appcompat:appcompat:1.0.2'

You need to use a Theme.AppCompat theme error, even with theme set to AppCompat

2 Answers2