OnClickListener在我的适配器类中不起作用 [英] OnClickListener is not working inside my adapter class
本文介绍了OnClickListener在我的适配器类中不起作用的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我查看了许多在线发布的解决方案，但它们无法解决我的问题.可能适配器位置返回-1，但是为什么呢?
I looked at many solutions posted online but they couldn't solve my problem. Probably the adapter position is returning -1 but why?
java.lang.ArrayIndexOutOfBoundsException: length=10; index=-1
at java.util.ArrayList.get(ArrayList.java:439)
at
com.firebase.ui.common.BaseObservableSnapshotArray.getSnapshot(BaseObservableSnapshotArray.java:70)
at com.example.twitterclone.adapters.MyAdapter$TweetViewHolder.<init>(MyAdapter.kt:36)
at com.example.twitterclone.adapters.MyAdapter.onCreateViewHolder(MyAdapter.kt:50)
at com.example.twitterclone.adapters.MyAdapter.onCreateViewHolder(MyAdapter.kt:21)
at androidx.recyclerview.widget.RecyclerView$Adapter.createViewHolder(RecyclerView.java:7078)
at
RecyclerViewAdapterCode:
class MyAdapter(
options: FirestoreRecyclerOptions<Tweet>,
private val clickInterface: ClickInterface
):FirestoreRecyclerAdapter<Tweet, MyAdapter.TweetViewHolder>(options) {
inner class TweetViewHolder(view: View) : RecyclerView.ViewHolder(view) {
val profile =
view.findViewById<de.hdodenhof.circleimageview.CircleImageView>(R.id.userProfile)
val tweet = view.findViewById<TextView>(R.id.tweet)
val like = view.findViewById<TextView>(R.id.totalLikes)
val thumbsUp = view.findViewById<ImageView>(R.id.thumbsUp)
val name=view.findViewById<TextView>(R.id.tweetUserName)
init {
val tweetId=snapshots.getSnapshot(adapterPosition).get("tweetId")
thumbsUp.setOnClickListener {
clickInterface.clickLike(tweetId.toString())
}
}
}
override fun onCreateViewHolder(
parent: ViewGroup,
viewType: Int
): TweetViewHolder {
val viewHolder = TweetViewHolder(
LayoutInflater.from(parent.context).inflate(R.layout.post_tweets_item, parent, false)
)
return viewHolder
}
override fun onBindViewHolder(
holder: TweetViewHolder,
position: Int,
model: Tweet
) {
holder.tweet.text = model.content.toString()
holder.like.text = model.likes.toString()
UserDao().getUser(model.uid!!).get().addOnSuccessListener {
holder.name.text = it.get("name").toString()
Glide.with(holder.profile.context).load(it.get("profileUrl").toString())
.into(holder.profile)
}
}
}
LayoutCode
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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:layout_width="match_parent"
android:orientation="vertical"
android:layout_margin="10dp"
android:layout_height="wrap_content">
<androidx.cardview.widget.CardView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_margin="2dp"
app:cardCornerRadius="5dp"
app:cardElevation="2dp">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content">
<de.hdodenhof.circleimageview.CircleImageView
android:id="@+id/userProfile"
android:layout_width="40dp"
android:layout_height="40dp"
android:layout_marginTop="8dp"
android:layout_marginLeft="8dp" />
<TextView
android:id="@+id/tweetUserName"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="10dp"
android:textColor="@android:color/black"
android:layout_marginTop="8dp" />
</LinearLayout>
<TextView
android:id="@+id/tweet"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="13dp"
android:textColor="@android:color/black" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="80dp"
android:orientation="vertical"
android:padding="8dp">
<ImageView
android:layout_width="30dp"
android:id="@+id/thumbsUp"
android:clickable="true"
android:layout_height="30dp"
android:src="@drawable/ic_baseline_thumb_up_24" />
<TextView
android:id="@+id/totalLikes"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center" />
</LinearLayout>
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="80dp"
android:orientation="vertical"
android:padding="8dp">
<ImageView
android:clickable="true"
android:layout_width="30dp"
android:layout_height="30dp"
android:id="@+id/comments"
android:src="@drawable/ic_baseline_comment_24" />
<TextView
android:id="@+id/totalComments"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center" />
</LinearLayout>
</LinearLayout>
</LinearLayout>
</androidx.cardview.widget.CardView>
</LinearLayout>
ViewHolder的init块中的
推荐答案
adapterPosition返回-1.因此，我们只需要在侦听器中调用adapterPosition即可解决此问题，因为当创建视图持有者并将其附加到recyclerview时，它将检索位置.在init块中设置任何类型的侦听器是一种好方法，因为onCreateViewHolder仅调用一次才能创建视图持有者，而onBindViewHolder会为同一视图持有者多次调用，因此在onBindViewHolder中设置侦听器将是多余的.
adapterPosition in the ViewHolder's init block is returning -1. So we just need to call adapterPosition in the listener which will solve the issue, since it would retrieve the position when the view holder is created and attached to the recyclerview. Setting any kind of listeners in the init block is a good approach since the onCreateViewHolder called only once to create a view holder but the onBindViewHolder called multiple times for the same view holder, so setting listeners in the onBindViewHolder would be redundant.
init {
thumbsUp.setOnClickListener {
val tweetId=snapshots.getSnapshot(adapterPosition).get("tweetId")
clickInterface.clickLike(tweetId.toString())
}
}
这篇关于OnClickListener在我的适配器类中不起作用的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
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