Android 在自定义listview适配器(kotlin)中设置默认高亮显示项
默认情况下,我想使用setItemChecked突出显示列表项。CheckEditePosition设置高亮显示CheckEditePosition但不显示项目列表Android 在自定义listview适配器(kotlin)中设置默认高亮显示项,android,listview,kotlin,android-arrayadapter,itemselector,Android,Listview,Kotlin,Android Arrayadapter,Itemselector,默认情况下,我想使用setItemChecked突出显示列表项。CheckEditePosition设置高亮显示CheckEditePosition但不显示项目列表 this.view!!.listViewFragment.setItemChecked(3, true) 以下是我的阵列适配器代码: class MyListAdapter( context: Context, private val myItemList: List<Mytem>) : Array
this.view!!.listViewFragment.setItemChecked(3, true)
以下是我的阵列适配器代码:
class MyListAdapter(
context: Context,
private val myItemList: List<Mytem>)
: ArrayAdapter<Mytem>(context, R.layout.item_simple, myItemList) {
override fun getView(position: Int, convertView: View?, parent: ViewGroup): View {
val inflater = context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE) as LayoutInflater
val rowView: View?
if (!myItemList[position].isHeader) {
rowView = inflater.inflate(R.layout.item_simple, parent, false)
rowView.itemTitle.text = myItemList[position].name
} else {
rowView = inflater.inflate(R.layout.item_header_group, parent, false)
rowView.header.text = myItemList[position].name
}
return rowView
}
override fun isEnabled(position: Int): Boolean {
return !myItemList[position].isHeader
}
}
我已经测试了这个:
this.view!!.listViewFragment.refreshDrawableState()
this.view!!.listViewFragment.invalidateViews()
如何正确设置默认突出显示的项目?我创建了示例RecyclerView适配器。您可以使用视图代替TextView,使用setBackgroundColor()代替setTextColor()。您应该在片段中触发checkedItem(int)方法,然后notifyDataSetChanged或notifyItemChanged()
/**
*beyazid于2019年3月11日创建。
*/
公共类MyAdapter扩展了RecyclerView.Adapter{
私人语境;
私人充气机;
私有数组列表;
private int indexOfHighlightedItem=-1;
公共MyAdapter(上下文、ArrayList列表){
充气器=(LayoutFlater)context.getSystemService(context.LAYOUT\u充气器\u服务);
this.context=上下文;
this.list=列表;
}
@凌驾
公共MyViewHolder onCreateViewHolder(视图组父级,int-viewType){
视图=充气机。充气(R.layout.my\u row\u用于回收器视图,父视图,false);
返回新的MyViewHolder(视图);
}
@凌驾
公共无效onBindViewHolder(最终MyViewHolder,最终int位置){
固定件(位置);
holder.tvDummy.setOnClickListener(新视图.OnClickListener(){
@凌驾
公共void onClick(视图){
indexOfHighlightedItem=位置;
notifyDataSetChanged();
}
});
}
@凌驾
public int getItemCount(){
返回list.size();
}
公共无效检查编辑项(内部位置){
indexOfHighlightedItem=位置;
}
}
this.view!!.listViewFragment.setItemChecked(3, true)
this.view!!.listViewFragment.refreshDrawableState()
this.view!!.listViewFragment.invalidateViews()
/**
* Created by beyazid on 11.03.2019.
*/
public class MyAdapter extends RecyclerView.Adapter<MyAdapter.MyViewHolder> {
private Context context;
private LayoutInflater inflater;
private ArrayList<String> list;
private int indexOfHighlightedItem = -1;
public MyAdapter(Context context, ArrayList<String> list) {
inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
this.context = context;
this.list = list;
}
@Override
public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view = inflater.inflate(R.layout.my_row_for_recycler_view, parent, false);
return new MyViewHolder(view);
}
@Override
public void onBindViewHolder(final MyViewHolder holder, final int position) {
holder.bindItem(position);
holder.tvDummy.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
indexOfHighlightedItem = position;
notifyDataSetChanged();
}
});
}
@Override
public int getItemCount() {
return list.size();
}
public void checkedItem(int pos){
indexOfHighlightedItem = pos;
}
}