Programmatically bloated layout with Android Kotlin extensions

I have the following layout:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:background="@android:color/white"
    android:paddingLeft="20dp"
    android:paddingRight="20dp">

    <TextView
        android:id="@+id/tvErrorTitle"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="10dp"
        android:textColor="@android:color/background_dark"
        android:textSize="18sp"
        />
    <TextView
        android:id="@+id/tvErrorDesc"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="30dp"
        android:textColor="@android:color/darker_gray"
        android:textSize="16sp"
        />
    <TextView
        android:id="@+id/tvAction"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="30dp"
        android:layout_marginBottom="10dp"
        android:layout_gravity="end"
        android:padding="5dp"
        android:textSize="15sp"
        android:textStyle="bold"
        android:textAllCaps="true"
        android:textColor="@android:color/holo_purple"
        />
</LinearLayout>

      

When I want to use extend android kotlin out of work like below it doesn't work. I ended up with findViewById working.

...
...
import kotlinx.android.synthetic.main.dialog_error.*
...
...
 val view = LayoutInflater.from(context).inflate(R.layout.dialog_error, null, false)
    val tvErrorTitle = view.findViewById(R.id.tvErrorTitle) as TextView
    val tvErrorDesc = view.findViewById(R.id.tvErrorDesc) as TextView
    val tvErrorAction = view.findViewById(R.id.tvAction) as TextView

      

It does not pull views directly from the xml. How to use it in programmatically bloated layout and avoid it findViewById

?

Note . This question is strictly about Kotlin Android Extensions , not the language itself.

Edit I imported both:

import kotlinx.android.synthetic.main.dialog_error.view.*
import kotlinx.android.synthetic.main.dialog_error.*

      

But Android Studio is still trying to import from R.id and doesn't recognize these two imports. Is there something missing?

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1 answer


From the docs you linked :

If we want to call synthetic properties on the view (useful in adapter classes), we must also import

kotlinx.android.synthetic.main.activity_main.view.*.

      

That is, import kotlinx.android.synthetic.main.layout.view.*

to load extension properties View

.



Then:

val view = LayoutInflater.from(context).inflate(...)
view.tvErrorTitle.text = "test"

      

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