在Kotlin中使用AlertDialog时,如何在输入错误密码时返回到输入用户界面?

如果在alertDialog.onshowlistener中处理onclick listener for positive按钮,则可以避免对话框关闭流。请在下面找到修改的代码。

override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.layout_main)      
        showInputPasswordDialog()
    }  


    private fun showInputPasswordDialog {    
        val editText = EditText(this)
        val inputDialog = AlertDialog.Builder(this)
        inputDialog.setTitle("Input")
                   .setView(editText)
                   .setCancelable(false)
                   .setNegativeButton("Cancel", DialogInterface.OnClickListener { dialog, which ->
                           finish();
                   })

        inputDialog.setPositiveButton("OK",null)

       // modified code starts here
        val mAlertDialog = inputDialog.create()

        mAlertDialog.setOnShowListener(DialogInterface.OnShowListener {
        val b = mAlertDialog.getButton(AlertDialog.BUTTON_POSITIVE)
        b.setOnClickListener(View.OnClickListener {

          val password= editText.text.toString()
                if (password=="aa"){
                    mAlertDialog.dismiss();
                    //close the dialog
                }else{
                    toast("Password error")
                    //Return for input again
                }

        })
    })

    mAlertDialog.show() 

    }

裁判: How to prevent a dialog from closing when a button is clicked