Question

我有1个自定义视图，扩展了ConstraintLayout并包含1个EditText和2个TextViews

在我的自定义视图中，我定义了此attr（和其他属性）：

<attr name="Text" format="string" />

我像这样使用它：

app:Text="@={login.email}"

在我的自定义视图中，我定义了：

  companion object {
    @JvmStatic @BindingAdapter("Text")
    fun setText(nMe : View, nText: String) {
        nMe.nInput.setText(nText)
    }
    @InverseBindingAdapter(attribute = "Text")
    fun getText(nMe : View) : String {
      return  nMe.nInput.text.toString()
    }

女巫在单向绑定中效果很好

app:Text="@{login.email}"

但是当我尝试在双向绑定中使用它时，我得到了指向ActivityLoginBinding.java java.lang.String callbackArg_0 = mBindingComponent.null.getText（mEmail）;

的错误提示。

如何进行2向绑定？

L.E ：经过一番研究，我最终得出以下结论：

@InverseBindingMethods(InverseBindingMethod(type = 
CustomInput::class,attribute = "bind:Text",event = 
"bind:textAttrChanged",method = "bind:getText"))
class CustomEditTextBinder {
companion object {
    @JvmStatic
    @BindingAdapter(value = ["textAttrChanged"])
    fun setListener(editText: CustomInput, listener: InverseBindingListener?) {
        if (listener != null) {
            editText.nInput.addTextChangedListener(object : TextWatcher {
                override fun beforeTextChanged(charSequence: CharSequence, i: Int, i1: Int, i2: Int) {

                }

                override fun onTextChanged(charSequence: CharSequence, i: Int, i1: Int, i2: Int) {

                }

                override fun afterTextChanged(editable: Editable) {
                    listener.onChange()
                }
            })
        }
    }

    @JvmStatic
    @InverseBindingAdapter(attribute = "Text")
    fun getText(nMe: CustomInput): String {
        return nMe.nInput.text.toString()
    }

    @JvmStatic
    @BindingAdapter("Text")
    fun setText(editText: CustomInput, text: String?) {
        text?.let {
            if (it != editText.nInput.text.toString()) {
                editText.nInput.setText(it)
            }
        }
    }
}

}

但是现在我得到： 找不到事件TextAttrChanged

Answer 1

我认为您只需要if (isset($_POST['button1'])) { $input_data = $_POST['input1']; // do other stuffs like foreach, if and etc.. // and return new data in array $results = array(); echo json_encode($results); }。

这对我有用（如果文本为0，则将文本设置为空Sub Convert_ExceltoPDF() Application.DisplayStatusBar = True Application.ScreenUpdating = False Dim sh As Worksheet Dim fso As New FileSystemObject Dim fo As Folder Dim f As File Dim n As Integer Dim x As Integer Dim wb As Workbook Dim I As Long Set sh = ThisWorkbook.Sheets("Sheet1") Set fo = fso.GetFolder(sh.Range("E3").Value) For Each f In fo.Files n = n Application.StatusBar = "Processing..." & n & "/" & fo.Files.Count Set wb = Workbooks.Open(f.Path) Call Print_Settings(f, xlPaperLetter) wb.ExportAsFixedFormat xlTypePDF, sh.Range("E4").Value & Application.PathSeparator & VBA.Replace(f.Name, ".xlsx", ".pdf"), quality:=xlQualityStandard, IncludeDocProperties:=True, IgnorePrintAreas:=True Call Print_Settings(f, xlPaperLetter) wb.Close Next Application.StatusBar = "" MsgBox "Process Complete" End Sub Sub Print_Settings(f As File, ePaperSize As XlPaperSize) On Error Resume Next Application.PrintCommunication = False With PageSetup LeftMargin = Application.InchesToPoints(0) RightMargin = Application.InchesToPoints(0) TopMargin = Application.InchesToPoints(0) BottomMargin = Application.InchesToPoints(0) HeaderMargin = Application.InchesToPoints(0) FooterMargin = Application.InchesToPoints(0) Orientation = xlLandscape PaperSize = ePaperSize Zoom = False FitToPagesWide = 1 FitToPagesTall = 1 End With Application.PrintCommunication = True End Sub）：

event = "android:textAttrChanged"

Kotlin 2向装订自定义视图

1 个答案: