Saving Data on Android

PostDetailsActivity.kt
, navigate to 
initializeClickListener()
, and 
replace the 
TODO
 inside 
addCommentButton
 click listener with a call to 
addComment()
:
Saving Data on Android
Chapter 18: Reading Data from Cloud Firestore
raywenderlich.com
265

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... 
addCommentButton.setOnClickListener { 
  
val
 comment = commentEditText.text.toString().trim() 
  
if
 (comment.isNotEmpty()) { 
    cloudFirestoreManager.addComment( 
      post.id, 
      comment,  
      ::onCommentSuccessfullyAdded,  
      ::onCommentAddFailed 
      ) 
  } 
else
 { 
    showToast(getString(R.string.empty_comment_message)) 
  } 
}
This will save the comment to the database on 
Add Comment
 button click.
Build and run your app. Tap on any post in the list. Enter some text into the 
comments 
EditText
 and tap the 
Add Comment
 button:
Your comment is now saved to the database. Open the database in the console to 
confirm that. You should see your comment there:
Saving Data on Android
Chapter 18: Reading Data from Cloud Firestore
raywenderlich.com
266

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