Android custom Imageview throws 'can't cast' exception

Question

I'd like to use the ImageViewTopCrop class described in this question:

ImageView scaling TOP_CROP

My custom view is based on this code:

Custom Image View class

Here is a layout file using this custom view:

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/main_background"
android:background="#000"
android:orientation="vertical">
<FrameLayout
    android:id="@+id/details_frame"
    android:background="@color/white"
    android:layout_width="match_parent"
    android:layout_height="0dp"
    android:layout_weight="6">

<com.grayraven.imagetest.ImageViewTopCrop
    android:id="@+id/grid_item_image"
    android:src="@drawable/hobbit"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
     />

     </FrameLayout>

Here's how I'm trying to display it in code:

com.grayraven.imagetest;

import android.os.Bundle;
import android.support.v7.app.ActionBar;
import android.support.v7.app.ActionBarActivity;
import android.text.Html;
import android.widget.ImageView;
import android.widget.TextView;

import com.squareup.picasso.Picasso;

public class DetailsActivity extends ActionBarActivity {
    private TextView titleTextView;
    private com.grayraven.imagetest.ImageViewTopCrop imageView;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_details_view);

    ActionBar actionBar = getSupportActionBar();
    actionBar.hide();

    String title = getIntent().getStringExtra("title");
    String imageUrl = getIntent().getStringExtra("imageUrl");
    titleTextView = (TextView) findViewById(R.id.title);
    imageView = (com.grayraven.project1.ImageViewTopCrop) findViewById(R.id.grid_item_image);  


//Exception thrown here:

//android.widget.ImageView cannot be cast to com.grayraven.imagetest.ImageViewTopCrop

//can't go any further
}


}

What simple thing am I missing?

Answer 1

I think you are type casting with wrong class.

You used

com.grayraven.imagetest.ImageViewTopCrop

in your xml but type casting with com.grayraven.project1.ImageViewTopCrop

Answer 2

I was missing a constructor in my custom view class. Never mind.