Dynamically load xml control and share UI control

问题

I am new to xamarin. Is it possible to load a shared UI control in an xml file, if yes, how? I am open to better idea.

Below is a static loading via include, where parent.axml statically load child.xml.

 <include
            android:id="@+id/child"
            layout="@layout/child"
            android:layout_below="@id/toolbar"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content" />

parent.axml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent">
    <include
        android:id="@+id/toolbar"
        layout="@layout/toolbar"
         android:layout_width="fill_parent"
        android:layout_height="wrap_content" />
    <include
        android:id="@+id/child"
        layout="@layout/child"
        android:layout_below="@id/toolbar"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content" />
    <LinearLayout
        android:orientation="vertical"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:id="@+id/parent_layout"
        android:layout_below="@id/child">
        <TextView
            android:id="@+id/parent_text"
            android:layout_margin="16dp"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:text="Click to go to the moon!"
            android:textAppearance="?android:attr/textAppearanceSmall"
            android:singleLine="true" />
    </LinearLayout>
</LinearLayout>

Child.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:local="http://schemas.android.com/apk/res-auto"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"> 
    <TextView
        android:id="@+id/child_text"
        android:layout_margin="16dp"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="You made it!"
        android:textAppearance="?android:attr/textAppearanceSmall" />
</RelativeLayout>

The idea is that it can achieve share of UI controls. In this case, parent.axml loads child.xml into its place holder based on condition.

回答1:

You can use LayoutInflater to inflate layouts and auto-attach them to the parent (or not):

var linearLayout = LayoutInflater.Inflate(Resource.Layout.Child, parent, true);
var textView = linearLayout.FindViewById<TextView>(Resource.Id.child_text);
textView.Text = "Inflated and attached to Parent";

Also depending upon your use-case, using a self-contained Fragment and adding that to your "parent" might be better a better solution.

来源：https://stackoverflow.com/questions/51126006/dynamically-load-xml-control-and-share-ui-control

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