我的节目中有一个听众，我猜这个听众被错误地使用了

Question

我的程序中有一个响应监听器，我得到了关于它的反馈，就像它被广泛使用一样。

val jsonObjectRequest = object : JsonObjectRequest(
                        Method.POST,
                        url,
                        sendOrder,
                        Response.Listener {
                            
                            val response = it.getJSONObject("data")
                            val success = response.getBoolean("success")
                            val LAUNCH_SECOND_ACTIVITY = 1
                            if (success) {
                                val intent = Intent(this, PaymentActivity::class.java)
                                intent.putExtra("total_amount",totalAmount)
                               
                                startActivityForResult(intent,LAUNCH_SECOND_ACTIVITY)

                            } else {
@@ -116,7 +118,7 @@ class CartActivity : AppCompatActivity() {
                            cartProgressLayout.visibility = View.INVISIBLE
                        },

这是我得到的反馈，这是什么意思以及如何改变它？

始终处理意外响应，例如不同的键或 值或 JSON 结构或空响应

Answer 1

您需要引入异常处理，这样如果收到的JSON 不满足给定的结构，您的应用就不会崩溃

try{
    val response = it.getJSONObject("data")          // This line can throw exception, if not handled it can cause your app to crash
    val success = response.getBoolean("success")     // This can also throw exception
    val LAUNCH_SECOND_ACTIVITY = 1
    if (success) {
        val intent = Intent(this, PaymentActivity::class.java)
        intent.putExtra("total_amount",totalAmount)
        startActivityForResult(intent,LAUNCH_SECOND_ACTIVITY)
    }
}
catch(jsonException: JSONException){
    // Json parsing failed, notify user if required
}
catch(e: Exception){
    // Something else failed, notify user if required
}