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：
CustomEditText
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,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)
// ...
}
模型
data class SampleData(
private var _content: String
) : BaSEObservable() {
var content: String
@Bindable get() = _content
set(value) {
_content = value
notifyPropertyChanged(BR.content)
}
}
使用带有数据绑定的CustomView的客户端
<?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CustomEditText替换为常规的EditText小部件,它可以很好地工作
解决方法
有趣,但我能找到一个伟大的
post on medium,帮助我解决这个问题.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,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,框架将负责通过注释处理找到它.请注意,为了防止无限循环,setText确实非常重要.我还补充说：
var text: String?
get() = editText_input.text.toString()
set(value) {
editText_input.setText(value)
}
fun addTextChangedListener(listener: TextWatcher) =
editText_input.addTextChangedListener(listener)
在CustomEditText上.
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