I have an ImageView (A back button) inside an activity and i want to finish the Activity by using data binding in the XML itself as such:
<ImageView
android:id="@id/ImageView_fromAddItemActivity_BackIcon"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="16dp"
android:layout_marginTop="8dp"
android:onClick = "@{ finish()}"
app:srcCompat="@drawable/ic_back_dark"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"/>
But it doesn't work. Anyone has an idea whether this is possible ?
For onClick()
to work you need to use the following notation: android:onClick=@{() -> function()}
.
What you could do is pass the Activity
in the databinding as a variable, ie
<layout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto">
<data>
<variable
name="activity"
type="android.app.activity" />
</data>
<ConstraintLayout... /> <!-- UI layout's root element -->
</layout>
then do activity.finish()
. I wouldn't do it that way though since you are tightly coupling the context with the data binding. You could instead go through a viewmodel
which you can bind, then do the finish() through it.
The technical post webpages of this site follow the CC BY-SA 4.0 protocol. If you need to reprint, please indicate the site URL or the original address.Any question please contact:yoyou2525@163.com.