当我多次点击回收者视图时,它会随机点击滚动到底部。
我怀疑问题出在模拟器上。我的AVD是Nexus 5 API 27 x86。
问题:如何消除此随机滚动?
这是最小的例子:https://github.com/OleksandrBezhan/RecyclerViewAccidentalScrolling
活动:
class MainActivity : AppCompatActivity() {
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_main)
recycler.layoutManager = LinearLayoutManager(this)
recycler.adapter = MyAdapter()
}
}
适配器:
class MyAdapter : RecyclerView.Adapter<MyAdapter.ViewHolder>() {
class ViewHolder(view: View, val text: TextView) : RecyclerView.ViewHolder(view)
override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ViewHolder {
val view = LayoutInflater.from(parent.context)
.inflate(R.layout.item, parent, false)
return ViewHolder(view, view.text)
}
override fun onBindViewHolder(holder: ViewHolder, position: Int) {
holder.text.text = "Hello world"
}
override fun getItemCount() = 3
}
activity_main.xml中:
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout 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:layout_height="match_parent"
tools:context=".MainActivity">
<android.support.v7.widget.RecyclerView
android:id="@+id/recycler"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</android.support.constraint.ConstraintLayout>
item.xml:
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout
xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:id="@+id/text"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
</android.support.constraint.ConstraintLayout>
更新 我添加了OnScrollListener,它显示在意外滚动时滚动状态转到SCROLL_STATE_FLING然后转到SCROLL_STATE_IDLE。
在正常情况下,滚动状态应该转到SCROLL_STATE_TOUCH_SCROLL - &gt; SCROLL_STATE_FLING - &gt; SCROLL_STATE_IDLE。
recycler.addOnScrollListener(object: RecyclerView.OnScrollListener(){
override fun onScrollStateChanged(recyclerView: RecyclerView?, newState: Int) {
Log.d("TEST", "onScrollStateChanged: $newState")
}
})
D/TEST: onScrollStateChanged: 2
D/TEST: onScrollStateChanged: 0
// 1, 2, 0 in normal scrolling
答案 0 :(得分:0)
这似乎是一个模拟器问题,因为在真实设备上没有问题。