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我有customrecycleAdapter,當我點擊元素我會改變顏色的行,但如果我滾動視圖背景更改位置或出現在其他元素。 我已經閱讀了關於Receycle的觀點,但是,對於這個問題什麼是workoround?用滾動RecycleAdapter重複元素的背景和滾動
我的適配器是:
public class CustomRecycleAdapter extends RecyclerView.Adapter<CustomRecycleAdapter.ViewHolder> {
private JSONArray dataSource;
private AdapterCallback mAdapterCallback;
public static SparseBooleanArray selectedItems;
public CustomRecycleAdapter(JSONArray dataArgs, Context context){
dataSource = dataArgs;
this.mAdapterCallback = ((AdapterCallback) context);
}
public static interface AdapterCallback {
void onMethodCallback(View caller, JSONObject obj, JSONArray data, int position);
}
@Override
public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
// create a new view
View view = LayoutInflater.from(parent.getContext())
.inflate(R.layout.list_view_activities, parent, false);
ViewHolder viewHolder = new ViewHolder(view, new CustomRecycleAdapter.ViewHolder.IMyViewHolderClicks() {
public void onClick(View caller, int position) {
try {
JSONObject itemClicked = dataSource.getJSONObject(position);
mAdapterCallback.onMethodCallback(caller, itemClicked, dataSource, position);
// Log.e("clicked", itemClicked.toString());
} catch (JSONException e) {
e.printStackTrace();
}
};
});
return viewHolder;
}
@Override
public void onBindViewHolder(ViewHolder holder, int position) {
try {
JSONObject object = dataSource.getJSONObject(position);
holder.textView.setText(object.getString("description"));
} catch (JSONException e) {
e.printStackTrace();
}
}
@Override
public int getItemCount() {
return dataSource.length();
}
public JSONObject getItem(int position) throws JSONException {
return dataSource.getJSONObject(position);
}
public static class ViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener{
public IMyViewHolderClicks mListener;
public TextView textView;
public TextView hours;
public ViewHolder(View itemView, IMyViewHolderClicks listener) {
super(itemView);
mListener = listener;
textView = (TextView) itemView.findViewById(R.id.activity);
hours = (TextView) itemView.findViewById(R.id.hours);
itemView.setOnClickListener(this);
}
@Override
public void onClick(View v) {
int position = getAdapterPosition();
Log.e("RecycleAdapterPosition", String.valueOf(getAdapterPosition()));
// mListener.onClick(v, position);
v.setBackgroundColor(Color.GREEN);
v.setSelected(true);
}
public interface IMyViewHolderClicks {
public void onClick(View caller, int position);
}
}
}
所以我點擊元素,並corretly的setBackground,但如果我滾動,我看到背景另一元素設置好的,如果我滾動了我的元素,我選擇的,避風港背景。
這是模型和視圖的分離的益處。點擊時,控制器應更新模型(即數組中的索引),然後更新後的模型應觸發視圖層(即適配器)的更新,然後使用該模型(顏色值)呈現適當的背景顏色。 – FishStix