The following classes could not be instantiated: - de.hdodenhof.circleimageview.CircleImageView

[tireks]

used

<de.hdodenhof.circleimageview.CircleImageView
            android:id="@+id/profile_image"
            android:layout_width="96dp"
            android:layout_height="96dp"
            android:src="@drawable/profile"
            app:civ_border_color="#FF000000"
            app:civ_border_width="2dp"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toTopOf="parent" />

from "usage" section in readme.
Keep getting exeption:

java.lang.NoClassDefFoundError: de/hdodenhof/circleimageview/R$styleable
	at de.hdodenhof.circleimageview.CircleImageView.<init>(CircleImageView.java:100)
	at de.hdodenhof.circleimageview.CircleImageView.<init>(CircleImageView.java:94)
	at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
	at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
	at java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
	at java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:490)
	at org.jetbrains.android.uipreview.ViewLoader.createNewInstance(ViewLoader.java:351)
	at org.jetbrains.android.uipreview.ViewLoader.loadClass(ViewLoader.java:200)
	at org.jetbrains.android.uipreview.ViewLoader.loadView(ViewLoader.java:161)
	at com.android.tools.idea.rendering.LayoutlibCallbackImpl.loadView(LayoutlibCallbackImpl.java:294)
	at android.view.BridgeInflater.loadCustomView(BridgeInflater.java:417)
	at android.view.BridgeInflater.loadCustomView(BridgeInflater.java:428)
	at android.view.BridgeInflater.createViewFromTag(BridgeInflater.java:332)
	at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:965)
	at android.view.LayoutInflater.rInflate_Original(LayoutInflater.java:1127)
	at android.view.LayoutInflater_Delegate.rInflate(LayoutInflater_Delegate.java:72)
	at android.view.LayoutInflater.rInflate(LayoutInflater.java:1101)
	at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:1088)
	at android.view.LayoutInflater.rInflate_Original(LayoutInflater.java:1130)
	at android.view.LayoutInflater_Delegate.rInflate(LayoutInflater_Delegate.java:72)
	at android.view.LayoutInflater.rInflate(LayoutInflater.java:1101)
	at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:1088)
	at android.view.LayoutInflater.inflate(LayoutInflater.java:686)
	at android.view.LayoutInflater.inflate(LayoutInflater.java:505)
	at com.android.layoutlib.bridge.impl.RenderSessionImpl.inflate(RenderSessionImpl.java:359)
	at com.android.layoutlib.bridge.Bridge.createSession(Bridge.java:436)
	at com.android.tools.idea.layoutlib.LayoutLibrary.createSession(LayoutLibrary.java:121)
	at com.android.tools.idea.rendering.RenderTask.createRenderSession(RenderTask.java:717)
	at com.android.tools.idea.rendering.RenderTask.lambda$inflate$9(RenderTask.java:873)
	at com.android.tools.idea.rendering.RenderExecutor$runAsyncActionWithTimeout$3.run(RenderExecutor.kt:192)
	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
	at java.base/java.lang.Thread.run(Thread.java:829)

Piece of source file CircleImageView.java

public CircleImageView(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);

        TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.CircleImageView, defStyle, 0);

        mBorderWidth = a.getDimensionPixelSize(R.styleable.CircleImageView_civ_border_width, DEFAULT_BORDER_WIDTH);
        mBorderColor = a.getColor(R.styleable.CircleImageView_civ_border_color, DEFAULT_BORDER_COLOR);
        mBorderOverlay = a.getBoolean(R.styleable.CircleImageView_civ_border_overlay, DEFAULT_BORDER_OVERLAY);
        mCircleBackgroundColor = a.getColor(R.styleable.CircleImageView_civ_circle_background_color, DEFAULT_CIRCLE_BACKGROUND_COLOR);

        a.recycle();

        init();
    }

Every "R." is causing an error "Connot resolve symbol R"

Please, help. Maybe i'm using it wrongly?

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.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=".ui.fragments.SettingsFragment">

    <androidx.constraintlayout.widget.ConstraintLayout
        android:layout_width="match_parent"
        android:layout_height="100dp"
        android:background="@color/material_drawer_primary"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent">

        <de.hdodenhof.circleimageview.CircleImageView
            android:id="@+id/profile_image"
            android:layout_width="96dp"
            android:layout_height="96dp"
            android:src="@drawable/profile"
            app:civ_border_color="#FF000000"
            app:civ_border_width="2dp"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toTopOf="parent" />
    </androidx.constraintlayout.widget.ConstraintLayout>


</androidx.constraintlayout.widget.ConstraintLayout>

[hdodenhof]

The snippets you posted seem perfectly fine. Try cleaning / rebuilding the project.