Custom View Constructor In Android 4.4 Crashes On Kotlin, How To Fix?

I have a custom view written in Kotlin using JvmOverloads that I could have default value. class MyView @JvmOverloads constructor( context: Context, attrs: AttributeSet? =

Solution 1:

Best way is to have your class this way.

classMyView : LinearLayout {
    @JvmOverloads constructor(context: Context, attrs: AttributeSet? = null, defStyleAttr: Int = 0) : super(context, attrs, defStyleAttr)
    @TargetApi(Build.VERSION_CODES.LOLLIPOP) constructor(context: Context, attrs: AttributeSet?, defStyleAttr: Int, defStyleRes: Int) : super(context, attrs, defStyleAttr, defStyleRes)
}

Solution 2:

I got a way of doing so. Just overload the first 3 functions will do, leave the 4th one for Lollipop and above wrap with @TargetApi.

classMyView : LinearLayout {
    @JvmOverloads
    constructor(context: Context, attrs: AttributeSet? = null, defStyleAttr: Int = 0)
        : super(context, attrs, defStyleAttr)

    @TargetApi(Build.VERSION_CODES.LOLLIPOP)
    constructor(context: Context, attrs: AttributeSet?, defStyleAttr: Int, defStyleRes: Int)
        : super(context, attrs, defStyleAttr, defStyleRes)
}

Solution 3:

Just define the constructors like this:

constructor(context: Context) : super(context)
constructor(context: Context, attrs: AttributeSet) : super(context, attrs)
constructor(context: Context, attrs: AttributeSet, defStyleAttr: Int) : super(context, attrs, defStyleAttr)
@TargetApi(21)constructor(context: Context, attrs: AttributeSet, defStyleAttr: Int, defStyleRes: Int) : super(context, attrs, defStyleAttr, defStyleRes)