通常在XML布局中,默认的主要布局如下:
<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.widget.DrawerLayout 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"
android:id="@+id/drawer_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
tools:openDrawer="start">
<include
layout="@layout/app_bar_main"
android:layout_width="match_parent"
android:layout_height="match_parent" />
<android.support.design.widget.NavigationView
android:id="@+id/nav_view"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_gravity="start"
android:fitsSystemWindows="true"
app:headerLayout="@layout/nav_header_main"
app:menu="@menu/activity_main_drawer" />
</android.support.v4.widget.DrawerLayout>
我尝试使用Anko DSL编写这段代码:
...
override fun createView(ui: AnkoContext<MainActivity>) = with(ui) {
drawerLayout {
lparams(width = matchParent, height = matchParent)
id = ID_DRAWER_LAYOUT
fitsSystemWindows = true
navigationView {
lparams(width = wrapContent, height = matchParent)
id = ID_NAVIGATION_VIEW
foregroundGravity = Gravity.START
fitsSystemWindows = true
addHeaderView(navHeaderView()) //// PROBLEM HERE ////
inflateMenu(R.menu.activity_main_drawer)
}
}
}
private fun ViewGroup.navHeaderView() {
linearLayout {
lparams(width = matchParent, height = dip(160))
backgroundResource = R.drawable.side_nav_bar
gravity = Gravity.BOTTOM
orientation = LinearLayout.VERTICAL
setPadding(dip(64), dip(16), dip(64), dip(16))
imageView {
id = ID_IMAGE_VIEW
topPadding = dip(16)
imageResource = android.R.drawable.sym_def_app_icon
}
textView {
lparams(width = matchParent, height = wrapContent)
id = ID_TEXT_NAME
topPadding = dip(16)
text = "test1"
if (Build.VERSION.SDK_INT >= 23) {
setTextAppearance(R.style.TextAppearance_AppCompat_Body1)
} else {
setTextAppearance(context, android.R.style.TextAppearance_Medium)
}
}
textView {
id = ID_TEXT_DESCRIPTION
text = "test2"
}
}
}
...
这条标记线会抛出一个异常,表示该视图已经有父级。
然后我尝试使用 Anko DSL 预览插件自动转换 xml,但它只是这样做了,没有完全将其转换为 Anko DSL:
android.support.v4.widget.DrawerLayout {
id = Ids.drawer_layout
include<View>(R.layout.app_bar_main).lparams(width = matchParent, height = matchParent)
org.mewx.projectprpr.template.NavigationFitSystemView {
id = Ids.nav_view
app:headerLayout = @layout/nav_header_main //// HERE ////
app:menu = @menu/activity_main_drawer
}.lparams(width = wrapContent, height = matchParent)
}
我该如何使用Anko DSL添加头部视图?
谢谢!