初學- 記錄下

https://www.cnblogs.com/MyXcc/p/12881253.html

login.setOnClickListener{
            println("----點選登入----")
            var user:String = userInput.text.toString()
            var pwd:String = pwdInput.text.toString()
            var str:String = "使用者名稱：$user, 密碼:$pwd  "
            Toast.makeText(applicationContext, str, Toast.LENGTH_SHORT).show()
            
            
 
// 頁面跳轉
            var intent = Intent()
            intent.setClass(this,HomeActivity().javaClass)
            val bundle = Bundle()
            // 傳參
            bundle.putString("text", "Kotlin練習跳轉傳值")
            intent.putExtras(bundle)
            startActivity(intent)
        }

傳參簡寫：

// 頁面跳轉 HomeActivity:目標頁面Activity
 

 var intent: Intent = Intent(this, HomeActivity().javaClass) 
 // 傳參 
 intent.putExtra("text", "Kotlin練習跳轉傳值") 
 startActivity(intent)

引數接收：

class HomeActivity : AppCompatActivity() {

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_home)
        
 
// 引數接收
        val bundle = this.intent.extras
　　　　　// 給TextView 賦值
        homeTitle.text = bundle?.get("text").toString()
    }
}

Activity 需要 先註冊