Question

I have a class named CropImageView which is extended from ImageView. but the statement below makes castException:

CropImageView image = (CropImageView) findViewById(R.id.image);

here is the xml file:

    <FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent">

    <RelativeLayout
            android:layout_width="fill_parent"
            android:layout_height="fill_parent"
            android:orientation="horizontal">

        <ImageView  android:id="@+id/image"
                android:background="#55000000"
                android:layout_width="fill_parent"
                android:layout_height="fill_parent"
                android:layout_x="0dip"
                android:layout_y="0dip"/>
    </RelativeLayout>
  </FrameLayout>

do you have any suggestion?

Answer 1

You should use the CropImageView canonical name in the XML. Something like:

<your.package.CropImageView 
    android:id="@+id/image"
    android:background="#55000000"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:layout_x="0dip"
    android:layout_y="0dip"/>