How to switch to Gmail body with new Gmail UI to pass the mesage?

Hi All,
I am unable to switch to gmail body with new Gmail UI to pass the message. here i could able to pass the To and Subject but not able to switch to frame.
Please help me on this anyone . below is the code whic is using by me.





driver.findElement(By.xpath("//div[@class='aic']/div/div")).click();
driver.findElement(By.className("vO")).clear();
driver.findElement(By.className("vO")).sendKeys("abc");
driver.findElement(By.className("aoT")).clear();
driver.findElement(By.className("aoT")).sendKeys("Mail Subject");
// driver.switchTo().frame("tabindex=1");
// String ele=driver.findElement(By.xpath("//iframe[@tabindex='1']")).getAttribute("tabindex");
driver.switchTo().frame(driver.findElement(By.xpath("//div[@class-'Am Al editable']/iframe")));
Thread.sleep(2000);
driver.findElement(By.className("editable LW-avf")).clear();
driver.findElement(By.className("editable LW-avf")).sendKeys("Mail Body");
driver.switchTo().defaultContent();
driver.findElement(By.className("T-I J-J5-Ji aoO T-I-atl L3")).click();
driver.findElement(By.className("gbgt gbg4p gbes")).click();
driver.findElement(By.className("gbqfbb")).click();