Android 双向数据绑定错误:无法解析布尔属性的setter
我尝试在复选框上使用双向数据绑定:Android 双向数据绑定错误:无法解析布尔属性的setter,android,data-binding,Android,Data Binding,我尝试在复选框上使用双向数据绑定: <layout xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:tools="http://schemas.android.com/tools"> <data> <import type="android.view.View"/> <variable name="viewModel
<layout xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools">
<data>
<import type="android.view.View"/>
<variable
name="viewModel"
type="com.epsilon.startbodyweight.selectorActivity.SelectorViewModel"/>
<variable
name="index"
type="int" />
</data>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<CheckBox
android:id="@+id/cb_active_exer"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_margin="8dp"
android:checked="@={viewModel.exerciseList[index].isActive}" />
这是指Android Studio 2.2中的一个bug,它使用的是Java。我正在使用Kotlin的3.2版
我试图手动为函数isActive创建一个setter,但它抱怨已经为布尔属性定义了一个setter。在编写绑定表达式时,将@JvmField注释添加到ExerciseEntity类的isActive属性中。KotlinBoolean
s以is开头
在绑定表达式语言中显示,但不显示它
例如,考虑一个KTLIN数据类,它的属性叫<代码> ISActudio./P>
数据类练习(变量isActive:Boolean)
在绑定表达式中,此属性将显示为active
,而不是isActive
分享你的课程SelectorViewModel@KrishnaSharma补充!除了viewModelExerciseListIndex,一切看起来都很好。@KrishnaSharma那么为什么你认为我会出现这个错误?你找到原因了吗??如果不在github中共享代码库,我也可以进行调试
@Entity
class ExerciseEntity {
var exerciseName: String = ""
@PrimaryKey
var exerciseNum: Int = 0
var progressionName: String = ""
var progressionNumber: Int = 0
var set1Reps: Int = 0
var set2Reps: Int = 0
var set3Reps: Int = 0
var setTime: Int = 0
var isTimedExercise: Boolean = false
var numAttempts: Int = 0
var isActive: Boolean = true
// Do not store the following items in our DB
@Ignore var allProgressions: ArrayList<String> = ArrayList()
@Ignore var nextSet1Reps: Int = 0
@Ignore var nextSet2Reps: Int = 0
@Ignore var nextSet3Reps: Int = 0
@Ignore var nextSetTime: Int = 0
@Ignore var nextNumAttempts: Int = 0
@Ignore var nextProgressionName: String = ""
@Ignore var nextProgressionNumber: Int = 0
@Ignore var isModified: Boolean = false
@Ignore var exerMessage: String = ""
@Ignore var isSet1Complete: Boolean = false
@Ignore var isSet2Complete: Boolean = false
@Ignore var isSet3Complete: Boolean = false
@Ignore var isSetTimeComplete: Boolean = false
}
class SelectorViewModel : ViewModel() {
private val mExerciseList = MutableLiveData<ArrayList<ExerciseEntity>>()
val exerciseList : LiveData<ArrayList<ExerciseEntity>>
get() = mExerciseList
init {
mExerciseList.value = ArrayList()
}
fun populateExerciseListFromDB(myDBExercises: List<ExerciseEntity>) {
// .... Load our exer list from DB ... //
mExerciseList.value?.addAll(myDBExercises)
// Use the "setValue" method to notify observers of change
mExerciseList.value = mExerciseList.value
}
private fun updateRepsInExercise(exercise: ExerciseEntity, reps1: Int, reps2: Int, reps3: Int) {
exercise.set1Reps = reps1
exercise.set2Reps = reps2
exercise.set3Reps = reps3
mExerciseList.value = mExerciseList.value
}
fun incrementSet(exercise: ExerciseEntity, smallIncrement: Boolean) {
// ... Compute the new reps ... //
updateRepsInExercise(exercise, numReps1, numReps2, numReps3)
}
}