Я создаю приложение, содержащее recyclerview, и добавляю данные в recyclerview arrayList из alertDilog и редактирую, удаляю данные из AlertDilog в соответствии с щелчком пользователя. Это работает правильно, но когда я подключаю свое приложение к firebase Database, мое приложение не работает должным образом.
Адаптер Recyclerview:
public class recyclerviewadapter extends RecyclerView.Adapter<recyclerviewadapter.Viewholder> {
ArrayList<customitem> datalist;
vonclick mclick;
@NonNull
@Override
public Viewholder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
View v = LayoutInflater.from(parent.getContext()).inflate(R.layout.recyclerviewexdesign,parent,false);
return new Viewholder(v,mclick);
}
public recyclerviewadapter(ArrayList<customitem> datalist) {
this.datalist = datalist;
}
@Override
public void onBindViewHolder(@NonNull Viewholder holder, int position) {
customitem n = datalist.get(position);
holder.productname.setText(n.getproductname());
}
@Override
public int getItemCount() {
return datalist.size();
}
public class Viewholder extends RecyclerView.ViewHolder {
TextView productname;
public Viewholder(@NonNull View itemView, final vonclick listener) {
super(itemView);
productname = itemView.findViewById(R.id.titleid);
itemView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (listener!=null){
int possition =getAdapterPosition();
if (possition !=RecyclerView.NO_POSITION){
listener.cclick(possition);
}
}
}
});
}
}
public interface vonclick{
void cclick(int possition);
}
public void recyclerviewonclicl(vonclick possition){
mclick=possition;
}
}
и класс элемента:
public class customitem {
String productname,size,price,box;
int kg;
public customitem(){
}
public customitem(String productname, String size,String price,String box,int kg) {
this.productname = productname;
this.size = size;
this.price = price;
this.box = box;
this.kg = kg;
}
public String getproductname() {
return productname;
}
public void setproductname(String productname) {
this.productname = productname;
}
public String getsize() {
return size;
}
public void setsize(String size) {
this.size = size;
}
public String getPrice() {
return price;
}
public void setPrice(String price) {
this.price = price;
}
public String getBox() {
return box;
}
public void setBox(String box) {
this.box = box;
}
public int getKg() {
return kg;
}
public void setKg(int kg) {
this.kg = kg;
}
}
последний основной класс:
public class addproduct extends AppCompatActivity {
RecyclerView recyclerView;
ArrayList<customitem> datalist =new ArrayList<customitem>();
FirebaseDatabase mdatabase;
DatabaseReference mreference;
EditText productname,price,size,b2;
Spinner sizespinner;
Button okbutton;
View mview;
ImageView cancel;
AlertDialog d;
AlertDialog.Builder alert;
recyclerviewadapter adapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_addproduct);
getSupportActionBar().setTitle("Add product");
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
mdatabase = FirebaseDatabase.getInstance();
//?????????????????????? my firebase referance ????????????
mreference = mdatabase.getReference().child("product");
mreference.keepSynced(true);
recyclerView = findViewById(R.id.recyclerviewid);
buildrecyclerview();
//mreference.child("product").setValue(datalist);
}
public void buildrecyclerview(){
adapter = new recyclerviewadapter(datalist);
recyclerView.setHasFixedSize(true);
recyclerView.setLayoutManager(new GridLayoutManager(this,4));
recyclerView.setAdapter(adapter);
mreference.addValueEventListener(new ValueEventListener() {
@Override
public void onDataChange(@NonNull DataSnapshot dataSnapshot) {
for (DataSnapshot dataSnapshot1:dataSnapshot.getChildren()){
customitem j =dataSnapshot1.getValue(customitem.class);
datalist.add(j);
}
adapter.notifyDataSetChanged();
}
@Override
public void onCancelled(@NonNull DatabaseError databaseError) {
}
});
adapter.recyclerviewonclicl(new recyclerviewadapter.vonclick() {
@Override
public void cclick(final int possition) {
//?????????????? alert dilog two for delete and update data ????????????????
AlertDialog.Builder bl = new AlertDialog.Builder(addproduct.this);
View v = getLayoutInflater().inflate(R.layout.manageralertdilogtwo,null);
bl.setView(v);
d=bl.create();
d.show();
final EditText productname2 = v.findViewById(R.id.productname2);
final EditText size2 = v.findViewById(R.id.packsizeid2);
final EditText price2 = v.findViewById(R.id.priceid2);
final EditText box2 = v.findViewById(R.id.Box2);
Button okbtn = v.findViewById(R.id.okbuttonid2);
Button dltbtn = v.findViewById(R.id.deleteid);
ImageView cross =v.findViewById(R.id.cancelid2);
final Spinner sp =v.findViewById(R.id.spinnerid2);
//String pn = datalist.get(possition).getproductname();
productname2.setText(datalist.get(possition).getproductname());
size2.setText(datalist.get(possition).getsize());
price2.setText(datalist.get(possition).getPrice());
box2.setText(datalist.get(possition).getBox());
sp.setSelection(datalist.get(possition).getKg());
cross.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
d.dismiss();
}
});
okbtn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
//?????????????? update data accroding user selectiong ??????????????
//datalist.get(possition).setproductname(productname2.getText().toString());
//datalist.get(possition).setPrice(price2.getText().toString());
//datalist.get(possition).setsize(size2.getText().toString());
//datalist.get(possition).setBox(box2.getText().toString());
//datalist.get(possition).setKg(sp.getSelectedItemPosition());
customitem m = new customitem(productname2.getText().toString(),size2.getText().toString()
,price2.getText().toString(),box2.getText().toString(),sp.getSelectedItemPosition());
mreference.child(String.valueOf(datalist.get(possition))).setValue(m);
d.dismiss();
}
});
dltbtn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
//???????????????? delete data from recycler view accroding user selection ???????????
//datalist.remove(possition);
mreference.child(String.valueOf(datalist.get(possition))).removeValue();
// adapter.notifyDataSetChanged();
d.dismiss();
}
});
}
});
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.addproductmenu,menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()){
case R.id.addproduct:
buildalert();
break;
case R.id.seedetails:
Intent n = new Intent(addproduct.this,managermain.class);
startActivity(n);
break;
}
return super.onOptionsItemSelected(item);
}
public void buildalert(){
//?????? alert dilog one for take data ???????????????
alert = new AlertDialog.Builder(addproduct.this);
mview = getLayoutInflater().inflate(R.layout.manageralertalertdilog,null);
productname = mview.findViewById(R.id.productname);
price = mview.findViewById(R.id.priceid);
alert.setCancelable(true);
size = mview.findViewById(R.id.packsizeid);
cancel = mview.findViewById(R.id.cancelid);
sizespinner = mview.findViewById(R.id.spinnerid);
okbutton = mview.findViewById(R.id.okbuttonid);
b2 = mview.findViewById(R.id.Box);
alert.setView(mview);
final AlertDialog dl = alert.create();
dl.show();
cancel.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
dl.dismiss();
}
});
okbutton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (productnamem() && sizem()){
//add data from alert dilog
String productnm = productname.getText().toString();
String pricec = price.getText().toString();
String sizee = size.getText().toString();
int kg = sizespinner.getSelectedItemPosition();
String box= b2.getText().toString();
//?? add data in recyclerview from alert dilog ???????????????
//datalist.add(new customitem(productnm,sizee,pricec,box,kg));
customitem n = new customitem(productnm,sizee,pricec,box,kg);
mreference.child(String.valueOf(datalist.size())).setValue(n);
//adapter.notifyDataSetChanged();
//mreference.setValue(datalist);
dl.dismiss();
}
}
});
}
public boolean productnamem(){
if (productname.getText().toString().trim().isEmpty()){
productname.setError("Please fill it");
productname.setFocusable(true);
return false;
}
else {
return true;
}
}
public boolean sizem(){
if (size.getText().toString().trim().isEmpty()){
size.setError("Please fill it");
size.setFocusable(true);
return false;
}
else {
return true;
}
}
}