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

As of android api 29 ('targetSdkVersion' 29) com.android.support has been moved to 'androidx' library. In your Build.gradle file(app level), dependencies block use...

dependencies{ ...

implementation 'androidx.annotation:annotation:1.1.0' }

And in your .java files use import as follows: import androidx.annotation.NonNull; ...

Again build your project!