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Android Build an Interactive Story App (Retired) User Input Using RelativeLayouts and ImageViews

Christopher Reuter
Christopher Reuter
9,503 Points

Suspected typo in quiz question 2/4. I believe there should be a '+' sign in the id for 'EditText'. Am I wrong?

Should be: android:layout_below="+@id/captionField" Not: android:layout_below="@id/captionField" Explain it to me if I'm wrong please, thanks!

-Chris Reuter

activity_main.xml
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent" >

    <EditText
        android:id="@+id/captionField"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:hint="Enter a caption" 
        android:layout_alignParentTop="true"/>

    <ImageView
        android:id="@+id/imageView1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_below="@id/captionField"
        android:src="@drawable/grumpy_cat" />

</RelativeLayout>

1 Answer

andren
andren
28,558 Points

While these challenges are not always perfect in this instance the challenge is the one in the right.

"@+id" is used when creating a new id, when you are referencing an id that already exists you don't include the +. "android:layout_below" is referencing an existing id, not creating it. So it's correct that it does not include the +.