have run the code in my phone or just the "else" condition is working.on running the app just displays the "package is not installed"
"Kotlin"
val button = findViewById<Button>(R.id.openwhtaspchat)
button.setOnClickListener {
val uri = Uri.parse("smsto"+"+923354859491")
val intent = Intent(Intent.ACTION_SENDTO,uri)
intent.setPackage("com.whatsapp")
if (intent.resolveActivity(this.packageManager)!=null){
startActivity(intent)
}else{
Toast.makeText(this,"package is not installed",Toast.LENGTH_SHORT).show()
}