我经历了许多类似的问题，但没有一个答案似乎解决了我的问题。我实现了一个自定义EditText，我希望与双向数据绑定兼容。问题是，每次我尝试编译时都会收到错误：
Error:java.lang.IllegalStateException: failed to analyze: android.databinding.tool.util.LoggedErrorException: Found data binding errors.
****/ data binding error ****msg:Cannot find the getter for attribute 'android:text' with value type java.lang.String on com.app.toolkit.presentation.view.CustomEditText. file:/Users/humble-student/Home/workspace/android/application/app/src/main/res/layout/login_view.xml loc:68:8 - 81:69 ****\ data binding error ****
at org.jetbrains.kotlin.analyzer.AnalysisResult.throwIfError(AnalysisResult.kt:57)
at org.jetbrains.kotlin.cli.jvm.compiler.KotlinToJVMBytecodeCompiler.compileModules(KotlinToJVMBytecodeCompiler.kt:137)
at org.jetbrains.kotlin.cli.jvm.K2JVMCompiler.doExecute(K2JVMCompiler.kt:158)
at org.jetbrains.kotlin.cli.jvm.K2JVMCompiler.doExecute(K2JVMCompiler.kt:61)
at org.jetbrains.kotlin.cli.common.CLICompiler.execImpl(CLICompiler.java:107)
at org.jetbrains.kotlin.cli.common.CLICompiler.execImpl(CLICompiler.java:51)
at org.jetbrains.kotlin.cli.common.CLITool.exec(CLITool.kt:92)
at org.jetbrains.kotlin.daemon.CompileServiceImpl$compile$1$2.invoke(CompileServiceImpl.kt:386)
at org.jetbrains.kotlin.daemon.CompileServiceImpl$compile$1$2.invoke(CompileServiceImpl.kt:96)
at org.jetbrains.kotlin.daemon.CompileServiceImpl$doCompile$$inlined$ifAlive$lambda$2.invoke(CompileServiceImpl.kt:892)
at org.jetbrains.kotlin.daemon.CompileServiceImpl$doCompile$$inlined$ifAlive$lambda$2.invoke(CompileServiceImpl.kt:96)
at org.jetbrains.kotlin.daemon.common.DummyProfiler.withMeasure(PerfUtils.kt:137)
at org.jetbrains.kotlin.daemon.CompileServiceImpl.checkedCompile(CompileServiceImpl.kt:919)
at
这是我的实施：
class CustomEditText @JvmOverloads constructor(
context: Context, attrs: AttributeSet? = null, defStyleAttr: Int = 0
) : LinearLayout(context, attrs, defStyleAttr) {
// ...
private lateinit var editText_input: EditText
private lateinit var textView_errorMessage: TextView
private var isErrorDisplayed = false
private var inputTextOriginalColor: ColorStateList? = null
init {
orientation = VERTICAL
clearContainerFormatting()
createEditTextInput(context, attrs, defStyleAttr)
createTextViewErrorMessage(context)
addView(editText_input)
addView(textView_errorMessage)
}
fun setError(message: String) {
//...
}
fun getText(): String = editText_input.text.toString()
fun setText(text: String) = editText_input.setText(text)
// ...
}
data class SampleData(
private var _content: String
) : BaseObservable() {
var content: String
@Bindable get() = _content
set(value) {
_content = value
notifyPropertyChanged(BR.content)
}
}
<?xml version="1.0" encoding="utf-8"?>
<layout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools">
<data>
<import type="android.view.View" />
<variable
name="data"
type="SampleData" />
<variable
name="presenter"
type="SamplePresenter" />
</data>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:animateLayoutChanges="true"
tools:context=".sample_view.presentation.view.SampleView">
<NotificationPopup
android:id="@+id/notificationPopup"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:clipToPadding="false"
android:elevation="4dp"
app:allowManualExit="true" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
android:gravity="center"
android:orientation="vertical">
<TextView
android:id="@+id/textView_mirror"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:fontFamily="sans-serif"
android:text="@{data.content}"
android:textSize="16sp"
android:textStyle="bold"
tools:text="test" />
<CustomEditText
android:id="@+id/customEditText_sample"
style="@style/RegisterInput"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="Type anything"
android:text="@={data.content}" />
<Button
android:id="@+id/button_validateInput"
style="@style/Widget.AppCompat.Button.Colored"
android:layout_width="150dp"
android:layout_height="wrap_content"
android:layout_marginEnd="8dp"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
android:onClick='@{(v) -> presenter.onValidateDataClick(customEditTextSample.getText())}'
android:text="Validate Input" />
</LinearLayout>
</RelativeLayout>
</layout>
P.S。：如果我将常规CustomEditText小部件替换为EditText，则效果非常好
答案 0 :(得分：6)
很有趣，但我能找到一个很棒的post on medium帮我解决了这个问题。基本上我需要的是CustomEditTextBinder：
@InverseBindingMethods(
InverseBindingMethod(
type = CustomEditText::class,
attribute = "android:text",
method = "getText"
)
)
class CustomEditTextBinder {
companion object {
@JvmStatic
@BindingAdapter(value = ["android:textAttrChanged"])
fun setListener(editText: CustomEditText, listener: InverseBindingListener?) {
if (listener != null) {
editText.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
@BindingAdapter("android:text")
fun setText(editText: CustomEditText, text: String?) {
text?.let {
if (it != editText.text) {
editText.text = it
}
}
}
它可能看起来很奇怪但你实际上并不需要在任何地方调用它，只需添加类，框架将通过注释处理来寻找它。请注意，setText对于防止无限循环非常重要。我还补充道：
var text: String?
get() = editText_input.text.toString()
set(value) {
editText_input.setText(value)
}
fun addTextChangedListener(listener: TextWatcher) =
editText_input.addTextChangedListener(listener)
on CustomEditText。