如何在 kotlin 中使用意图发送值

Question

    Login.setOnClickListener(View.OnClickListener {
        val id = ID.getText().toString()
        val pw = Password.getText().toString()
        val responseListener =
            Response.Listener<String?> { response ->
                try {
                    val jsonObject = JSONObject(response)
                    val success = jsonObject.getBoolean("success")
                    if (success) {
                        val msg = jsonObject.getString("nickName")
                        val userInd = jsonObject.getString("userInd")
                        Toast.makeText(applicationContext, "success. ID :$msg", Toast.LENGTH_SHORT).show()
                        val intent = Intent(this@MainActivity,LoginActivity::class.java)
                        intent.putExtra("UserInd",userInd)
                        Log.d("MainActivity", "UserInd: $userInd")
                        startActivity(intent)
                        finish()
                    } else {
                        Toast.makeText(applicationContext, "fail", Toast.LENGTH_SHORT).show()
                        return@Listener
                    }
                } catch (e: JSONException) {
                    e.printStackTrace()
                    Toast.makeText(applicationContext, "except 1", Toast.LENGTH_SHORT).show()
                    return@Listener
                } catch (e: Exception) {
                    e.printStackTrace()
                }
            }
        val loginRequestActivity = LoginRequestActivity(id, pw, responseListener)
        val queue = Volley.newRequestQueue(applicationContext)
        queue.add(loginRequestActivity)
    })

在MainActivity.kt中 和

val intent = intent val UserInd: String? = intent.getStringExtra("UserInd") Log.d("BookInsertActivity", "UserInd: $UserInd")

在 BookInsert.kt 中

在 MainActivity 服务器中发送 userInd 打印 UserInd:1 成功，但通过使用意图向 BookInsert 发送值
BookInsert.kt 打印 UserInd:null
如何解决？

Answer 1

如果 userInd 是一个整数（integer），那么在检索它时也应该得到正确的类型。例如：

val UserInd: Int = intent.getIntExtra("UserInd",0)