[英]How to track item selection on recycler view item click?
當用戶click
任何項目時,我想突出顯示recyclerview
項目,而上一個項目將被unselected
請幫助?
為此,您必須編寫一個選擇器。
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:drawable="@color/colorAccent" android:state_selected="true" />
<item android:drawable="@color/ash" android:state_selected="false" />
<item android:drawable="@color/ash" />
</selector>
為了在onClick
上獲得所需的行為,您必須明確選擇該項目。
public class CellAdapter extends RecyclerView.Adapter<CellAdapter.ViewHolder> {
private Context context;
private View prevView;
public CellAdapter(Context context) {
this.context = context;
}
@Override
public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.recycle_cell, parent, false);
CellAdapter.ViewHolder viewHolder = new ViewHolder(view);
return viewHolder;
}
@Override
public void onBindViewHolder(ViewHolder holder, int position) {
}
@Override
public int getItemCount() {
return 10;
}
public class ViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener {
public ViewHolder(View itemView) {
super(itemView);
itemView.setOnClickListener(this);
}
@Override
public void onClick(View v) {
if (prevView != null) {
prevView.setSelected(false);
}
v.setSelected(true);
prevView = v;
Toast.makeText(context, String.valueOf(getAdapterPosition()), Toast.LENGTH_SHORT).show();
}
}
}
並確保為recycleView設置Set clickable true。
<android.support.v7.widget.RecyclerView
android:id="@+id/recycle_view"
android:layout_width="wrap_content"
android:clickable="true"
android:focusable="true"
android:layout_height="wrap_content" />
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