RecyclerView android error - app fails when trying to run it on android

Question

I'm trying to create an app that displays a list of all user contacts, and im using RecyclerView. when i try to run my app it fails, i notice then the problem is in "activity_main.xml" in the lines:

<android.support.v7.widget.RecyclerView 
    android:id="@+id/recycler_view" 
    android:layout_width="match_parent" 
    android:layout_height="match_parent">
</android.support.v7.widget.RecyclerView>

Given you are new, I would recommend you take a tour of stackoverflow before posting a question. Please share what is the error in the question itself. — Vinay Prajapati, Aug 21 '19 at 11:09

score 0 · Answer 1 · answered Aug 21 '19 at 14:40

The problem was in the xml file. need to replace

<android.support.v7.widget.RecyclerView 
android:id="@+id/recycler_view" 
android:layout_width="match_parent" 
android:layout_height="match_parent">

in this:

    <androidx.recyclerview.widget.RecyclerView
    android:layout_height="match_parent"
    android:layout_width="match_parent"
    android:id="@+id/recycler_view"/>

score -1 · Answer 2 · answered Aug 21 '19 at 11:24

-1

Don't forget to set layout manager in your xml or programmatically in onCreate:

app:layoutManager="androidx.recyclerview.widget.LinearLayoutManager"

or

recyclerView.layoutManager = LinearLayoutManager(this)

answered Aug 21 '19 at 11:24

Dmytro Batyuk

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RecyclerView android error - app fails when trying to run it on android

2 Answers2