Apparently you cannot clone views as stated by these answers:
How do I clone a View?
How to create Clone-Duplicate View?
If you inflated the first view from XML the way to go seems to be inflating the second view from XML, too.
To inflate your view from XML put it into an extra layout file, e.g. "textview.xml"
<?xml version="1.0" encoding="utf-8"?>
<TextView
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Hello World!" />
Then, inflate it from XML in your onCreate():
View view = LayoutInflater.from(this).inflate(R.layout.textview, null);
myLayout.addView(view);
与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…