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Android Build a Simple Android App with Java Creating the Screen Layout Editing a Layout File

Posted by Hasan Nehmeh
Hasan Nehmeh
943 Points

Error Message : Render Problem

I have an error message called Render Problem "Failed to load Appcompat ActionBar with unknown error"

My Emulator phone shows "Hello World" and updates the screen when I change the words in the code. However in the Android Studio section when I click Design (Design/Text), there are no words, its just an empty white screen. What do I do?

4 Answers

Steve Mbouadeu
PLUS
Steve Mbouadeu
Courses Plus Student 358 Points
Steve Mbouadeu
Steve Mbouadeu
Courses Plus Student 358 Points

This worked for me. Modify /res/values/styles.xml from:

<style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar"> </style> to:

<style name="AppTheme" parent="Base.Theme.AppCompat.Light.DarkActionBar"> </style>

Ken Alger
STAFF
Ken Alger
Treehouse Teacher
Ken Alger
Ken Alger
Treehouse Teacher

Hasan;

Do you have a link to your project code available? It would make it much easier to help debug if we can see all the code and how it's tied together. That being said, it sounds like it might be an issue with the Android support library version you are using in your project in the app's build.gradle file. Or the Action Bar setting in styles.xml. Extremely difficult to say which without seeing your project code.

Please post back with additional information.

Happy coding,
Ken

James Rennie
James Rennie
16,807 Points
James Rennie
James Rennie
16,807 Points

I also have a Render issue ("Failed to load AppCompat ActionBar with unknown error.")

<?xml version="1.0" encoding="utf-8"?> <android.support.constraint.ConstraintLayout 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=".MainActivity">

<TextView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="@string/hello_wod"
    app:layout_constraintBottom_toBottomOf="parent"
    app:layout_constraintLeft_toLeftOf="parent"
    app:layout_constraintRight_toRightOf="parent"
    app:layout_constraintTop_toTopOf="parent" />

<android.support.constraint.Guideline
    android:id="@+id/guideline"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:orientation="vertical"
    app:layout_constraintGuide_begin="20dp" />

<android.support.constraint.Guideline
    android:id="@+id/guideline2"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:orientation="horizontal"
    app:layout_constraintGuide_begin="20dp" />

</android.support.constraint.ConstraintLayout>

Ruslan T
Ruslan T
1,706 Points
Ruslan T
Ruslan T
1,706 Points

I have the same problem:

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout 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=".FunFactsActivity">

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Did you know that:"
        android:visibility="visible"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

</android.support.constraint.ConstraintLayout>