Android Log-ing not working

[oleJa]

i have java code.

Log.e("mail: ",account.name); - message is not displayed

package org.qtproject.example;

import org.qtproject.qt5.android.QtNative;
import org.qtproject.qt5.android.bindings.QtApplication;
import org.qtproject.qt5.android.bindings.QtActivity;

import android.accounts.Account;
import android.accounts.AccountManager;
import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
import android.util.Patterns;
import java.util.regex.Pattern;

public class Android_info extends org.qtproject.qt5.android.bindings.QtActivity{

static String mail;

public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    Pattern emailPattern = Patterns.EMAIL_ADDRESS; // API level 8+
    Account[] accounts = AccountManager.get(this).getAccounts();
    for (Account account : accounts) {
        if (emailPattern.matcher(account.name).matches()) {
            mail = account.name;
            Log.e("mail: ",account.name);
        }
    }
}

public static String return_mail(){
    return mail;
}

}