Android.widget.RelativeLayout cannot be cast to android.widget.ImageView

Question

I'm trying to get the instance of a ImageView defined in an XML layout file:

<RelativeLayout
    android:id="@+id/visual_compass_container"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_alignParentLeft="true"
    android:layout_below="@+id/output_container" >

    <ImageView
        android:id="@+id/visual_compass"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_alignParentTop="true"
        android:contentDescription="Compass"
        android:scaleType="fitStart"
        android:src="@drawable/compass_rose" />

</RelativeLayout>

But I always get that runtime error:

... java.lang.ClassCastException: android.widget.RelativeLayout cannot be
cast to android.widget.ImageView ... at net.example.MainActivity.onCreate
(MainActivity.java:57)

Line "57" is that one:

compassView = (ImageView) findViewById(R.id.visual_compass);

I can't figure out why that error ist thrown; I don't see the problem with that piece of code. Does anybody elso know?

Thank you, Felix D.

Answer 1

Make sure in your code the compassView is ImageView variable only and try to access it as

  ImageView compassView = (ImageView) findViewById(R.id.visual_compass); 

And if everything is correct then try to clean and Build your project again from the menu Project-> clean. and Proejct-> Build .