Expanding on fedj’s answer, if you set layout_width to 0dp and set the layout_weight for each of the buttons to 1, the available width will be shared equally between the buttons.
A couple of reasons that this can happen: 1) You see this error with an incorrect namespace, or a typo in the attribute. Like ‘xmlns’ is wrong, it should be xmlns:android 2) First node needs to contain: xmlns:android=”http://schemas.android.com/apk/res/android” 3) If you are integrating AdMob, check custom parameters like ads:adSize, you need xmlns:ads=”http://schemas.android.com/apk/lib/com.google.ads” 4) If you … Read more