我在recyclerView适配器中更改了复选框onCheckedChanged。我更改了自定义类的onChecked方法。这是我的适配器的源代码
public class RecyclerAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> {
private List<PackagesList> transactionList;
private Context mContext;
private int layoutID;
private static Typeface mediumTypeface, lightTypeface;
private int valueInPixels;
private boolean isLoading;
public interface OnLoadMoreListener {
void onLoadMore();
}
public void setmOnLoadMoreListener(OnLoadMoreListener mOnLoadMoreListener) {
this.mOnLoadMoreListener = mOnLoadMoreListener;
}
private OnLoadMoreListener mOnLoadMoreListener;
private final int VIEW_TYPE_ITEM = 0;
private final int VIEW_TYPE_LOADING = 1;
public void setCheckAllcheckbox(boolean checkAllcheckbox) {
this.checkAllcheckbox = checkAllcheckbox;
}
public boolean isShowingCheckbox;
public boolean checkAllcheckbox;
public void setIsShowingCheckbox(boolean isShowingCheckbox) {
this.isShowingCheckbox = isShowingCheckbox;
}
public boolean isShowingCheckbox() {
return isShowingCheckbox;
}
public RecyclerAdapter(int layoutID, final List<PackagesList> transactions, Context context, NestedScrollView nestedScrollView) {
this.layoutID = layoutID;
this.mContext = context;
this.transactionList = transactions;
mediumTypeface = Typeface.createFromAsset(mContext.getAssets(), "fonts/Roboto-Medium.ttf");
valueInPixels = (int) mContext.getResources().getDimension(R.dimen.u_common_text_size_large);
lightTypeface = Typeface.createFromAsset(mContext.getAssets(), "fonts/Roboto-Light.ttf");
if (nestedScrollView != null) {
nestedScrollView.setOnScrollChangeListener(new NestedScrollView.OnScrollChangeListener() {
@Override
public void onScrollChange(NestedScrollView v, int scrollX, int scrollY, int oldScrollX, int oldScrollY) {
if (v.getChildAt(v.getChildCount() - 1) != null) {
if ((scrollY >= (v.getChildAt(v.getChildCount() - 1).getMeasuredHeight() - v.getMeasuredHeight())) &&
scrollY > oldScrollY) {
if (!isLoading) {
if (mOnLoadMoreListener != null) {
mOnLoadMoreListener.onLoadMore();
}
isLoading = true;
}
}
}
}
});
}
}
public void setLoaded() {
isLoading = false;
}
@Override
public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
if (viewType == VIEW_TYPE_LOADING) {
View v = LayoutInflater.from(parent.getContext()).inflate(R.layout.view_loading_more, parent, false);
return new LoadingViewHolder(v);
} else if (viewType == VIEW_TYPE_ITEM) {
View v = LayoutInflater.from(parent.getContext()).inflate(layoutID, parent, false);
return new TransactionHolder(v);
}
return null;
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public int getItemViewType(int position) {
return transactionList.get(position) == null ? VIEW_TYPE_LOADING : VIEW_TYPE_ITEM;
}
@Override
public void onBindViewHolder(RecyclerView.ViewHolder holder, final int position) {
if (holder instanceof TransactionHolder) {
final TransactionHolder transactionHolder = (TransactionHolder) holder;
final PackagesList packagesList = transactionList.get(position);
if (packagesList != null) {
transactionHolder.title.setText(packagesList.getTitle());
transactionHolder.tracking.setText("Tr. Code: " + packagesList.getTracking());
transactionHolder.desc.setText(packagesList.getDesc());
transactionHolder.date.setText(packagesList.getDate());
transactionHolder.price.setText(packagesList.getPrice() + "$");
String backgroundColor = packagesList.getColor().replace("0x", "#");
transactionHolder.mainLayout.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
if (onclickListerner != null)
onclickListerner.onClickListener("enter", position);
}
});
if (transactionHolder.swipeLayout != null) {
transactionHolder.swipeLayout.setOnSwipeItemClickListener(new SwipeLayout.OnSwipeItemClickListener() {
@Override
public void onSwipeItemClick(boolean left, int index) {
if (left) {
if (onclickListerner != null)
onclickListerner.onClickListener("editAction", position);
} else {
if (onclickListerner != null)
onclickListerner.onClickListener("deleteAction", position);
}
}
});
}
if (isShowingCheckbox) {
if (!transactionHolder.appCompatCheckBox.isShown())
transactionHolder.appCompatCheckBox.setVisibility(View.VISIBLE);
transactionHolder.circleImageView.setVisibility(View.GONE);
transactionHolder.letterImageView.setVisibility(View.GONE);
transactionHolder.appCompatCheckBox.setChecked(packagesList.isChecked());
transactionHolder.appCompatCheckBox.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton compoundButton, boolean ischecked) {
if (packagesList.isChecked())
packagesList.setChecked(false);
else
packagesList.setChecked(true);
}
});
transactionHolder.appCompatCheckBox.setChecked(packagesList.isChecked());
} else {
transactionHolder.appCompatCheckBox.setVisibility(View.GONE);
transactionHolder.appCompatCheckBox.setChecked(false);
if (packagesList.getLogo().length() > 0) {
Picasso.with(mContext).load(packagesList.getLogo()).into(transactionHolder.circleImageView);
transactionHolder.letterImageView.setVisibility(View.INVISIBLE);
transactionHolder.circleImageView.setVisibility(View.VISIBLE);
} else if (packagesList.getTitle().length() > 0) {
transactionHolder.letterImageView.setOval(true);
transactionHolder.letterImageView.setInitAllProperties(Color.parseColor("#ffffff"),
Color.parseColor(backgroundColor),
mediumTypeface, valueInPixels);
transactionHolder.letterImageView.setLetter(packagesList.getNickname());
transactionHolder.letterImageView.setVisibility(View.VISIBLE);
transactionHolder.circleImageView.setVisibility(View.INVISIBLE);
} else {
Picasso.with(mContext).load(packagesList.getDefaultLogo()).into(transactionHolder.circleImageView);
transactionHolder.letterImageView.setVisibility(View.INVISIBLE);
transactionHolder.circleImageView.setVisibility(View.VISIBLE);
}
}
transactionHolder.mainLayout.setOnLongClickListener(new View.OnLongClickListener() {
@Override
public boolean onLongClick(View view) {
setIsShowingCheckbox(true);
notifyDataSetChanged();
return true;
}
});
}
} else if (holder instanceof LoadingViewHolder) {
LoadingViewHolder loadingViewHolder = (LoadingViewHolder) holder;
loadingViewHolder.progressBar.setVisibility(View.VISIBLE);
}
}
@Override
public int getItemCount() {
return transactionList == null ? 0 : transactionList.size();
}
public PackagesList getItem(int position) {
return transactionList.get(position);
}
public interface onclickListerner {
void onClickListener(String type, int pos);
void onLongClickListener(String type, int pos);
}
class LoadingViewHolder extends RecyclerView.ViewHolder {
public MaterialProgressBar progressBar;
public LoadingViewHolder(View itemView) {
super(itemView);
progressBar = itemView.findViewById(R.id.progressBar);
}
}
public class TransactionHolder extends RecyclerView.ViewHolder {
private TextView title;
private TextView tracking;
private TextView desc;
private TextView price;
private TextView date;
private CircleImageView circleImageView;
private LetterImageView letterImageView;
private SwipeLayout swipeLayout;
private LinearLayout mainLayout;
private AppCompatCheckBox appCompatCheckBox;
public TransactionHolder(final View view) {
super(view);
title = view.findViewById(R.id.u_title);
tracking = view.findViewById(R.id.u_tracking);
desc = view.findViewById(R.id.u_desc);
price = view.findViewById(R.id.u_price);
date = view.findViewById(R.id.u_date);
letterImageView = view.findViewById(R.id.iv_avatar);
appCompatCheckBox = view.findViewById(R.id.checkbox);
swipeLayout = itemView.findViewById(R.id.swipe_layout);
mainLayout = view.findViewById(R.id.mainLayout);
circleImageView = view.findViewById(R.id.circle_image);
title.setTypeface(mediumTypeface);
tracking.setTypeface(mediumTypeface);
price.setTypeface(mediumTypeface);
desc.setTypeface(lightTypeface);
date.setTypeface(mediumTypeface);
}
}
private onclickListerner onclickListerner;
public void setOnclickListerner(onclickListerner onclickListerner) {
this.onclickListerner = onclickListerner;
}
}
我的recyclerView中有onLoad more方法。在load more方法中,我在我的recyclerView中添加了新元素,并调用notifyDataSetChanged。notifyDataSetChanged之后,onCheckedChanged会自动调用,并且复选框中的isChecked为false。
下面是“我加载更多”方法的代码段
if (loadMore) {
Log.e("recyclerAdapter after",recyclerAdapter.isShowingCheckbox()+"");
if (serverStatus==4 &&!recyclerAdapter.isShowingCheckbox())
recyclerAdapter.setIsShowingCheckbox(true);
packagesLists.remove(packagesLists.size() - 1);
recyclerAdapter.notifyItemRemoved(packagesLists.size());
recyclerAdapter.setLoaded();
recyclerAdapter.notifyDataSetChanged();
}
如果复选框已选中,则notifyDataSetChanged后复选框状态为未选中。在notifyDataSetChanged之后,如何重写代码以保存复选框状态?
谢谢
