Issue in resolving nonnull and notnull symbol in looper.java

Question

I\'m developing an android app please help me to solve dependency error.

package android.os;
import android.support.annotation.NonNull;
import android.suppor         


        

Answer 1

Try:

import android.support.annotation.NonNull;

Also add gradle build as other guys already mentioned:

dependencies {
    compile 'com.android.support:support-annotations:+'
}