Magento 2.1 How to get custom configuration in custom observer?

Question

I am using Magento 2.1 and I am trying to get my custom configuration field's values in my custom observer.

I have tried implementing this solution, but it is not working.

I am trying using object manager in my observer:

 $objectManager = \Magento\Framework\App\ObjectManager::getInstance();
 $qty1 = $this->objectManager->get('Magento\Framework\App\Config\ScopeConfigInterface')->getValue('membership/general/qty1');

System.xml:

<?xml version="1.0"?>
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:module:Magento_Config:etc/system_file.xsd">
 <system>
 <tab id="beadsventure" translate="label" sortOrder="10">
 <label>beadsventure</label>
 </tab>
 <section id="membership" translate="label" sortOrder="130" showInDefault="1" showInWebsite="1" showInStore="1">
 <class>separator-top</class>
 <label>Membership Discount</label>
 <tab>beadsventure</tab>
 <resource>BeadsVenture_Membership::membership_config</resource>
 <group id="general" translate="label" type="text" sortOrder="10" showInDefault="1" showInWebsite="0" showInStore="0">
 <label>General Configuration</label>
 <field id="qty1" translate="label" type="text" sortOrder="0" showInDefault="1" showInWebsite="0" showInStore="0">
 <label>Quantity for Level 1</label>
 <validate>validate-number</validate>
 <comment>This will threshold Quantity for Level 1 (If empty then Default value is 3).</comment>
 </field>
 <field id="price1" translate="label" type="text" sortOrder="0" showInDefault="1" showInWebsite="0" showInStore="0">
 <label>Price for Level 1</label>
 <validate>validate-number</validate>
 <comment>This will threshold Price for Level 1 (If empty then Default value is 500ドル).</comment>
 </field>
 <field id="qty2" translate="label" type="text" sortOrder="1" showInDefault="1" showInWebsite="0" showInStore="0">
 <label>Quantity for Level 2</label>
 <validate>validate-number</validate>
 <comment>This will threshold Quantity for Level 2 (If empty then Default value is 5).</comment>
 </field>
 <field id="price2" translate="label" type="text" sortOrder="1" showInDefault="1" showInWebsite="0" showInStore="0">
 <label>Price for Level 2</label>
 <validate>validate-number</validate>
 <comment>This will threshold Price for Level 2 (If empty then Default value is 1500ドル).</comment>
 </field>
 <field id="qty3" translate="label" type="text" sortOrder="2" showInDefault="1" showInWebsite="0" showInStore="0">
 <label>Quantity for Level 3</label>
 <validate>validate-number</validate>
 <comment>This will threshold Quantity for Level 3 (If empty then Default value is 10).</comment>
 </field>
 <field id="price3" translate="label" type="text" sortOrder="2" showInDefault="1" showInWebsite="0" showInStore="0">
 <label>Price for Level 3</label>
 <validate>validate-number</validate>
 <comment>This will threshold Price for Level 3 (If empty then Default value is 3000ドル).</comment>
 </field>
 <field id="qty4" translate="label" type="text" sortOrder="3" showInDefault="1" showInWebsite="0" showInStore="0">
 <label>Quantity for Level 4</label>
 <validate>validate-number</validate>
 <comment>This will threshold Quantity for Level 4 (If empty then Default value is 20).</comment>
 </field>
 <field id="price4" translate="label" type="text" sortOrder="3" showInDefault="1" showInWebsite="0" showInStore="0">
 <label>Price for Level 4</label>
 <validate>validate-number</validate>
 <comment>This will threshold Price for Level 4 (If empty then Default value is 5000ドル).</comment>
 </field>
 </group>
 </section>
 </system>
</config>

Observer:

namespace BeadsVenture\Membership\Observer;
 class Beadsmemberamount implements \Magento\Framework\Event\ObserverInterface
 { 
 public function decide_group_id ($amount, $id, $qty)
 {
 $objectManager = \Magento\Framework\App\ObjectManager::getInstance();
 $price1 = $objectManager->get('Magento\Framework\App\Config\ScopeConfigInterface')->getValue('membership/general/price1');
 if($amount >= $price1) {
 $id = 4;
 }
 return $id;
 }
 }

Please Help!

• Amit Bera: What problem your have facing
• Amit Bera: Please share the system.xml code and also it observer code
• Wasiq Shahrukh: @AmitBera Updated the details
• Amit Bera: code seems code. Are sure that you observer is running?
• Wasiq Shahrukh: Yes it is running, I haven't mentioned my "execute" method

Answer 1

Add function in observer file:

public function __construct(\Magento\Framework\App\Config\ScopeConfigInterface $scopeConfig)
 {
 $this->_scopeConfig = $scopeConfig;
 }

and update your code:

 public function decide_group_id ($amount, $id, $qty)
 {
 $objectManager = \Magento\Framework\App\ObjectManager::getInstance();
 $price1 = $objectManager->get('Magento\Framework\App\Config\ScopeConfigInterface')->getValue('membership/general/price1');
 if($amount >= $price1) {
 $id = 4;
 }
 return $id;
 }

with

 public function decide_group_id ($amount, $id, $qty)
 {
 $price1 = $this->_scopeConfig->getValue('membership/general/price1', \Magento\Store\Model\ScopeInterface::SCOPE_STORE);
 if($amount >= $price1) {
 $id = 4;
 }
 return $id;
 }

After that clear cache and run command php bin/magento setup:di:compile.