How to handle push notification?

Code Snippet:

//Here we have Initialized driver as AppiumDriver 
driver.findElement(By.id("doc.saulmm.notification:id/simple_notification")).click();
((AndroidDriver) driver).openNotifications();
ListnotificationTitles = driver.findElements(By.id("android:id/title"));

for (WebElement title: notificationTitles) {
 String extractTitle = title.getText();
 if (extractTitle.contains("I'm a simple notification")) {
  driver.findElement(By.id("com.android.systemui:id/clear_notification")).click();
 }
}