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.support.annotation.Nullable;

I've add following dependencies:

dependencies {

    compile group: 'com.google.code.findbugs', name: 'jsr305', version: '3.0.0'
    compile 'com.android.support:multidex:1.0.1'
    compile fileTree(include: ['*.jar'], dir: 'libs')
    testCompile 'junit:junit:4.12'
    compile 'com.android.support:appcompat-v7:23.1.1'
    compile 'com.android.support:support-v4:23.1.1'
    compile 'com.android.support:design:23.1.1'
    compile 'com.parse:parse-android:1.12.0'
    compile fileTree(include: '*.jar', dir: 'libs')
    compile 'com.squareup.picasso:picasso:2.5.2'
    compile 'com.android.support:support-annotations:23.1.1'
}

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!

Answer 2

Try:

import android.support.annotation.NonNull;

Also add gradle build as other guys already mentioned:

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