Question

我有一个这样的对话框

val buyDialog = Dialog(activity)
buyDialog.requestWindowFeature(Window.FEATURE_NO_TITLE) //the stacktrace points here

        buyDialog.setContentView(R.layout.dialog_buy_items)
        buyDialog.setTitle("Buy Items")
        buyDialog.setCancelable(false)
        buyDialog.window!!.setLayout(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT)

        val buy_items_cancel = buyDialog.buy_items_cancel


        showSoftKeyboard(buy_items_root, false)
        showProgress(buy_items_progress, false)

        buy_items_cancel.setOnClickListener {
            buyDialog.cancel()
            buyDialog.dismiss()
        }

        buyDialog.show()

这是第一次正常工作。因此，当我通过单击“取消”按钮来取消对话框，然后再次打开该对话框时，我得到了错误

E/AndroidRuntime: FATAL EXCEPTION: main
    Process: com.zepling.nepsetrainer, PID: 27676
    android.util.AndroidRuntimeException: requestFeature() must be called before adding content
        at com.android.internal.policy.PhoneWindow.requestFeature(PhoneWindow.java:343)

我正在从这样的另一个AlertDialog调用此对话框

val builder = activity?.let { AlertDialog.Builder(it) }

            builder?.setTitle("Buy Items")
            builder?.setMessage("Do you want to buy available items?")

            builder?.setPositiveButton("YES") { dialog, _ ->

                showBuyItemsDialog()

            }

            builder?.setNegativeButton("No") { dialog, _ ->
                dialog.dismiss()
            }

            val alertDialog: AlertDialog = builder!!.create()

            alertDialog.show()

错误指向buyDialog.requestWindowFeature(Window.FEATURE_NO_TITLE)

我在做什么错？任何帮助，将不胜感激。谢谢

Answer 1

针对两种不同情况有两种可能的解决方案：

在您的代码中，如果您将活动用作对话框，则buyDialog.requestWindowFeature(Window.FEATURE_NO_TITLE)将不起作用。扩展Activity而不是ActionBarActivity，它应该可以解决问题。
如果您使用的是AppCompat，则必须在requestFeature()之前致电super.onCreate()。

Answer 2

如果使用 kotlin ，您可以测试此代码

val buyDialog = Dialog(activity)
    buyDialog.ownerActivity?.requestWindowFeature(Window.FEATURE_NO_TITLE)

在添加内容之前必须先调用requestFeature（），而在Android中必须先调用requestFeature（）

2 个答案: