Android Kotlin中的动态视图数组
我试图通过创建Android Kotlin中的动态视图数组,android,kotlin,android-view,Android,Kotlin,Android View,我试图通过创建TextView数组来创建动态TextView,但出现错误: java.lang.ArrayIndexOutOfBoundsException: length=0; index=0 我的代码: var txtViews=arrayOfNulls(3) 对于(txtViews.index中的i){ txtViews=阵列fnulls(i) txtViews[i]?.textSize=24.0F txtViews[i]?.text=“您好” txtViews[i]?.setTextC
TextView
数组来创建动态TextView
,但出现错误:
java.lang.ArrayIndexOutOfBoundsException: length=0; index=0
我的代码:
var txtViews=arrayOfNulls(3)
对于(txtViews.index中的i){
txtViews=阵列fnulls(i)
txtViews[i]?.textSize=24.0F
txtViews[i]?.text=“您好”
txtViews[i]?.setTextColor(ContextCompat.getColor)(此,
R.color.colorAccent)
layout.addView(txtViews[i])
}
您从未初始化数组中的空引用:
这应该对您试图实现的目标起作用:
val txtViews = arrayOfNulls<TextView>(3)
for (i in txtViews.indices) {
txtViews[i] = TextView(context).apply {
textSize = 24.0F
text = "Hello"
setTextColor(
ContextCompat.getColor(context,
R.color.colorAccent))
}
layout.addView(txtViews[i])
}
val txtViews=arrayOfNulls(3)
对于(txtViews.index中的i){
txtViews[i]=TextView(上下文)。应用{
textSize=24.0F
text=“你好”
setTextColor(
ContextCompat.getColor(上下文,
R.color.colorAccent)
}
layout.addView(txtViews[i])
}
无需创建阵列fnull
我是这样做的:
for (i in size) {
val txtView = TextView(this).apply {
textSize = 24.0F
text = Html.fromHtml("•")
setTextColor(
ContextCompat.getColor(
context,
R.color.colorAccent
)
)
}
layout.addView(txtView)
}
for (i in size) {
val txtView = TextView(this).apply {
textSize = 24.0F
text = Html.fromHtml("•")
setTextColor(
ContextCompat.getColor(
context,
R.color.colorAccent
)
)
}
layout.addView(txtView)
}