android - Cardview not allowing child views -


anyone know why not allowed put child views in card view?

lint (i think) throwing fit when try fill cardview content.

http://imgur.com/odhdfiz

a bit late party i've had same problem , fix seems to add line in build.gradle file, sync project. way gradle/android studio knows cardview , how provide hints:

compile 'com.android.support:cardview-v7:26.0.+'

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