以复制TextInputEditText中的内容为例
val cm = getSystemService(Context.CLIPBOARD_SERVICE) as ClipboardManager
private fun copyText(t: TextInputEditText, cm: ClipboardManager){
if(t.text?.isNotEmpty() == true) {
//t.selectAll()
ClipData.newPlainText("label", t.text)?.let {
cm.setPrimaryClip(it) }
//Toast.makeText(this, t.text, Toast.LENGTH_SHORT).show()
}
}