问题
I have integrated item is highlighted in the first launch of the app in my project. I'll use to save the selected item on the click of the adapter in the SQL database and set the value in the first launch of the app, but it does not change the background and text color. please help me in solving the issue and suggest me the right way
public class LoadVehicleTypeAdapter extends RecyclerView.Adapter<LoadVehicleTypeAdapter.CarTypesHolder> {
private List<TaxiTypeResponse.Message> CarTypesModelsList;
private Context mContext;
VehicleTypeView vehicleTypeView;
int I=-1;
int idd=0;
Activity activity;
GoogleMap map;
int II=-1;
List<VehicleClick> list;
public static String dbname="HellooClick";
public static MyAppRoomDataBase myAppRoomDataBase;
public class CarTypesHolder extends RecyclerView.ViewHolder implements View.OnClickListener {
public CustomTextView mCarType;
public CircleImageView mCarTypeImage;
LinearLayout llRoot;
CardView cardView;
setOnitemclick listener;
SparseBooleanArray mSparseArray;
public void setOnItemClickListner(setOnitemclick listener)
{
this.listener=listener;
}
public CarTypesHolder(View view) {
super(view);
mCarType = (CustomTextView) view.findViewById(R.id.frag_cartypes_inflated_name);
mCarTypeImage = (CircleImageView) view.findViewById(R.id.frag_cartype_inflated_frameImage);
llRoot = (LinearLayout)view.findViewById(R.id.root1);
cardView=(CardView) view.findViewById(R.id.cardf);
mSparseArray=new SparseBooleanArray();
view.setOnClickListener(this);
}
@Override
public void onClick(View v) {
mSparseArray.put(getAdapterPosition(), true);
listener.ImageClick(v,getAdapterPosition());
}
}
public LoadVehicleTypeAdapter(Context context, List<TaxiTypeResponse.Message> CarTypesModelsList, VehicleTypeView vehicleTypeView,Activity activity,GoogleMap map) {
this.CarTypesModelsList = CarTypesModelsList;
mContext = context;
this.vehicleTypeView = vehicleTypeView;
this.activity=activity;
this.map=map;
}
@Override
public CarTypesHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View itemView = LayoutInflater.from(parent.getContext())
.inflate(R.layout.frag_cartype_inflated_view, parent, false);
return new CarTypesHolder(itemView);
}
@SuppressLint("ResourceType")
@Override
public void onBindViewHolder(final CarTypesHolder holder, final int position) {
myAppRoomDataBase=Room.databaseBuilder(activity,MyAppRoomDataBase.class,dbname).allowMainThreadQueries().build();
list=myAppRoomDataBase.userDao().getAll();
if(list.size()!=0){
II= Integer.parseInt(list.get(0).RideId);
}
if (II==position)
{
holder.llRoot.setBackgroundColor(Color.parseColor("#999999"));
holder.mCarType.setTextColor(Color.parseColor("#ffffff"));
}
else
{
}
SharedPreferences sharedPreferences = activity.getSharedPreferences("mSelected", Context.MODE_PRIVATE);
TaxiTypeResponse.Message carTypesModel = CarTypesModelsList.get(position);
holder.mCarType.setText(carTypesModel.getName());
holder.mCarTypeImage.setBackgroundResource(R.drawable.wait);
int color = Color.parseColor(PreferenceHandler.readString(mContext,PreferenceHandler.SECONDRY_COLOR,"#006fb6"));
holder.mCarType.setTextColor(color);
holder.setOnItemClickListner(new setOnitemclick() {
@Override
public void ImageClick(View v,int position1) {
I=position1;
notifyDataSetChanged();
if (list.size()!=0)
{
myAppRoomDataBase.userDao().delete();
list.clear();
}
VehicleClick vehicleClick=new VehicleClick();
vehicleClick.setRideId(String.valueOf(position1));
myAppRoomDataBase.userDao().insert(vehicleClick);
list.add(vehicleClick);
}
});
if (I==position)
{
holder.llRoot.setBackgroundColor(Color.parseColor("#999999"));
holder.mCarType.setTextColor(Color.parseColor("#ffffff"));
}
else
{
holder.llRoot.setBackgroundColor(Color.parseColor("#f3f3f3"));
holder.mCarType.setTextColor(Color.parseColor("#2196F3"));
}
Picasso.with(mContext).load(carTypesModel.getImagePath()).into(holder.mCarTypeImage);
}
@Override
public long getItemId(int position) {
return CarTypesModelsList.get(position).getID();
}
@Override
public int getItemCount() {
return CarTypesModelsList.size();
}
public void setSelection(LinearLayout imageView,CustomTextView textView,boolean value,int position){
if(value){
imageView.setBackgroundColor(Color.parseColor("#999999"));
textView.setTextColor(Color.parseColor("#FFFFFF"));
}else{
System.out.println("11111111111111111000000111111111111");
imageView.setBackgroundColor(Color.parseColor("#f3f3f3"));
textView.setTextColor(Color.parseColor("#2196F3"));
}
}
public interface setOnitemclick{
void ImageClick(View view,int position);
}
@Override
public int getItemViewType(int position) {
return position;
}
}
来源：https://stackoverflow.com/questions/53737022/on-first-load-of-recyclerview-how-to-set-selected-item-which-i-store-in-database