Android：编辑以编程方式添加的视图

Question

So I have a messaging app where I read my database and render all the messages programatically. The thing is, when I am inside a different layout, I need to inflate those messages and edit them at will. For example,

val myView = inflater.inflate(R.layout.female_messaging_fragment, container, false)
...

val convLayout = myView.findViewById<LinearLayout>(R.id.conversations_layout)
val profileLayout = LinearLayout(context)

 val recentMessage = TextView(context)
 recentMessage.id = 5



val recentParams = LinearLayout.LayoutParams(ActionBar.LayoutParams.WRAP_CONTENT, ActionBar.LayoutParams.WRAP_CONTENT)

            recentParams.setMargins(10, 0, 0, 0)

            recentMessage.layoutParams = recentParams
            recentMessage.textSize = 16f
            if (didIsendLastMessage) {
                val arrowIcon = ImageView(context)
                Picasso.get().load(R.drawable.right_arrow).resize(50, 50).into(arrowIcon)
                val imageParams = LinearLayout.LayoutParams(ActionBar.LayoutParams.WRAP_CONTENT, ActionBar.LayoutParams.WRAP_CONTENT)
                imageParams.gravity = Gravity.CENTER
                arrowIcon.layoutParams = imageParams
                recentMessage.setText(mostRecentMessage)
                arrowAndMessageLayout.addView(arrowIcon)
                arrowAndMessageLayout.addView(recentMessage)
            } else {
                recentMessage.setText(mostRecentMessage)
                arrowAndMessageLayout.addView(recentMessage)
            }


            nameLastmessageLayout.addView(arrowAndMessageLayout)


            // Add namne and message to profile
            profileLayout.addView(nameLastmessageLayout)
convLayout.addView(profileLayout)

And then in a different layout...

LayoutInflater inflater = (LayoutInflater) getApplicationContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View v = inflater.inflate(R.layout.female_messaging_fragment, null);
TextView text = (TextView) v.findViewById(5);
text.setText("Something");

The thing is, text is always null, and I believe it is because I added the views programatically. What else can I do here? Thanks!

Answer 1

inflating female_messaging_fragment will return fresh new Layout view object of your xml that might be blank layout without any TextViews.

To get TextView object you need the object of Layout in which you had added the views.

For example as per your code you added recentMessage in arrowAndMessageLayout so to get the object of recentMessage you need the object of arrowAndMessageLayout and can get like below -

TextView text = arrowAndMessageLayout.findViewById(5);

OR

TextView text = convLayout.findViewById(5);

Inflating again will return fresh new container without your textview.

Hope this will help you.