Can't see elements layout android studio in activity_main.xml

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I'm beginning with android studio and I can't see the elements (Buttons,TextView,..) I drag and drop in my Design page in activity_main.xml page. Those elements are present in my XML file and I can see them when I run my app on my device but I don't know how I can see them on "Design and Blueprint" page.

Thanks for your help.

This is my xml code :

<?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:id="@+id/container"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity"
    tools:layout_editor_absoluteY="25dp">

    <TextView
        android:id="@+id/message"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/title_home"
        app:layout_constraintBottom_toTopOf="parent"
        app:layout_constraintEnd_toStartOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

    <android.support.design.widget.BottomNavigationView
        android:id="@+id/navigation"
        android:layout_width="1dp"
        android:layout_height="wrap_content"
        android:background="?android:attr/windowBackground"
        app:layout_constraintBottom_toTopOf="parent"
        app:layout_constraintEnd_toStartOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:menu="@menu/navigation" />

    <Button
        android:id="@+id/button"
        android:layout_width="12dp"
        android:layout_height="12dp"
        android:text="ClickMe"
        tools:layout_editor_absoluteX="-73dp"
        tools:layout_editor_absoluteY="29dp" />

    <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.ConstraintLayout>

And my canvas is totally empty.

EDIT :

I'v got 2 errors :

  • Render Problem : Failed to find style 'bottomNavigationStyle' in current theme Tip: Try to refresh the layout.

  • Missing Constraints in ConstraintLayout : This view is not constrained. It only has designtime positions, so it will jump to (0,0) at runtime unless you add the constraints


You can solve this problem by fixing the styles.xml file.

Then you just have to add Base in this code:

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

The final code:

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

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If you have the same error as this page, you should change com.android.support:appcompat-v7:28.0.0-alpha3 to com.android.support:appcompat-v7:28.0.0-alpha1 in build.gradle(Module: app) and and click File -> Invalidate Caches / Restart. Now everything is OK.

Of course you need internet access to download com.android.support:appcompat-v7:28.0.0-alpha1

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replace with this inside app gradle

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to fix this issue:

  1. delete API version 27 and 28. tools-->SDK manager uncheck ver 27 and 28
  2. uninstall android studio
  3. re-install android studio up to version 26 and the problem is solved

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1) Try to clean the project by using the option in the build menu in the top

2) Try to invalidate and restart Android Studio by choosing the option in the File menu

3) Try Rebuilding the project by choosing the option in the build menu in the top

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