MainActivity.java

public class MainActivity extends Activity {
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main_activity);
 
        Button wearButton = (Button)findViewById(R.id.wearButton);
        wearButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                int notificationId = 001;
 
                NotificationCompat.Builder notificationBuilder =
                        new NotificationCompat.Builder(MainActivity.this)
                                .setSmallIcon(R.mipmap.ic_launcher)
                                .setContentTitle("Title")
                                .setContentText("Android Wear Notification");
 
                NotificationManagerCompat notificationManager =
                        NotificationManagerCompat.from(MainActivity.this);
 
                notificationManager.notify(notificationId, notificationBuilder.build());
            }
        });
 
    }
}