android kotlin 页面跳转

初学- 记录下

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

login.setOnClickListener{
            println("----点击登录----")
            var user:String = userInput.text.toString()
            var pwd:String = pwdInput.text.toString()
            var str:String = "用户名：$user, 密码:$pwd  "
            Toast.makeText(applicationContext, str, Toast.LENGTH_SHORT).show()
            
            // 页面跳转
            var intent = Intent()
            intent.setClass(this,HomeActivity().javaClass)
            val bundle = Bundle()
            // 传参
            bundle.putString("text", "Kotlin练习跳转传值")
            intent.putExtras(bundle)
            startActivity(intent)
        }

传参简写：

// 页面跳转 HomeActivity:目标页面Activity

 var intent: Intent = Intent(this, HomeActivity().javaClass) 
 // 传参 
 intent.putExtra("text", "Kotlin练习跳转传值") 
 startActivity(intent)

参数接收：

class HomeActivity : AppCompatActivity() {

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_home)
        // 参数接收
        val bundle = this.intent.extras
　　　　　// 给TextView 赋值
        homeTitle.text = bundle?.get("text").toString()
    }
}

Activity 需要在 AndroidManifest.xml中注册

Fragment 跳转 Activity 方法

override fun onActivityCreated(savedInstanceState: Bundle?) {
        super.onActivityCreated(savedInstanceState);
        listViews.setOnClickListener{
            // 页面跳转
            var intent: Intent = Intent(this.getActivity(), Page1List().javaClass)
            startActivity(intent)
        }
    }

this.getActivity() 是获取上下文 context