问题
Using java, to create a control dynamically we use something like
TextView textview=new TextView(getApplicationContext());
how can the same be done in Kotlin? var textview = TextView
does't work, nor does var textview as TextView
unfortunately, haven't even encountered any good kotlin tutorials for android.
update-Actually am trying to create dynamic listview with a custom layout.
回答1:
You can, by calling the constructor of TextView, like so:
var textview = TextView(this) // "this" being the Activity
See creating instances in the official documentation.
回答2:
To create a textview dynamically, you have to call the constructor of textview and store it in a variable like this:
var myTextview = TextView(this);
You have to write this code in an activity or a fragment because this will represent an activity or a fragment.
Then use textview's all the methods like: setText();
myTextview.setText("Hello");
回答3:
You can also use
var myTextView: TextView? = TextView(this)
To assign text to TextView
myTextView?.setText("Hello")
But myTextView variable cannot be null.
来源：https://stackoverflow.com/questions/44138142/dynamically-create-controls-in-android-using-kotlin