文章

ViewStub

发表于
作者 Hacket Zeng
1 分钟阅读
ViewStub

ViewStub

什么是 ViewStub？

ViewStub 使用？

ViewStub 和 ViewBinding

  • 封装
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fun ViewStub.isRealInflated():Boolean {  
    return  inflatedId != View.NO_ID && parent == null  
}  
  
fun ViewStub.safeInflate() {  
    if (inflatedId != View.NO_ID && parent != null) {  
        inflate()  
    }  
}  
  
inline fun <reified T : View> ViewStub.safeInflate(): T? {  
    if (inflatedId != View.NO_ID && parent != null) {  
        setTag(R.id.v_annulus,inflate())  
    }  
    val bindingTag = getTag(R.id.v_annulus)  
    return if(bindingTag is T) bindingTag else null  
}  
  
inline fun <reified T : ViewBinding> ViewStub.safeBindInflateView(bindView: (view: View) -> ViewBinding): T? {  
    if (inflatedId != View.NO_ID && parent != null) {  
        setTag(R.id.v_annulus,bindView.invoke(inflate()))  
    }  
    return getTag(R.id.v_annulus) as? T  
}  
  
fun  ViewStub.safeInflateView(): View {  
    return if (inflatedId != View.NO_ID && parent != null) {  
        val view = inflate()  
        setTag(R.id.v_annulus,view)  
        view  
    } else {  
        (getTag(R.id.v_annulus) as? View) ?: this  
    }  
}
  • 使用

ViewStub 和 DataBinding

1

AsyncViewStub
  AndroidUI, 系统控件
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