how can i retrieve different child firebase database in single activity - firebase-realtime-database

Question

I am trying to retrieve data from Firebase Database and set them to text view. My database has different multiple child data. I want to retrieve all child in a single activity like globally. I have a different card view click in the main activity. when I click on any item it does not show the same child data with related that item. It shows single child data on every item click. How can I get them in a signal Activity on card view click? I am new to Android and I have tried multiple answers here, but failed. Can anyone help me with this?
public class GlobalActivity extends AppCompatActivity
RecyclerView mRecyclerView;
List<User> myUserList;
User mUser;
ProgressDialog progressDialog;
private DatabaseReference db;
private ValueEventListener eventListener;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_global);
progressDialog = new ProgressDialog(this);
progressDialog.setMessage("Please wait its loding..");
mRecyclerView = (RecyclerView) findViewById(R.id.farazList);
GridLayoutManager gridLayoutManager = new GridLayoutManager(AhmedFarazActivity.this, 1);
mRecyclerView.setLayoutManager(gridLayoutManager);
myUserList = new ArrayList<>();
final ReAdapter reAdapter = new ReAdapter(GlobalActivity.this, myUserList);
mRecyclerView.setAdapter(reAdapter);
db = FirebaseDatabase.getInstance().getReference().child("Spinner").child("US");
progressDialog.show();
eventListener = db.addValueEventListener(new ValueEventListener() {
#Override
public void onDataChange(DataSnapshot dataSnapshot) {
myUserList.clear();
for (DataSnapshot ds : dataSnapshot.getChildren()) {
User userData = ds.getValue(User.class);
myUserList.add(userData);
}
reAdapter.notifyDataSetChanged();
progressDialog.dismiss();
}
#Override
public void onCancelled(DatabaseError databaseError) {
progressDialog.dismiss();
}
});
}
}
Handle to click
This is handler in the adapter when I click on any item it does not show the same child data with related that item. It shows single child data on every item click.
#Override
public void onBindViewHolder(#NonNull MyHolder holder, int position) {
// Hide data
holder.nameText.setText(models.get(position).getName());
holder.img.setImageResource(models.get(position).getImg());
holder.setItemClickListener(new ItemClickListener() {
#Override
public void onItemClick(View view, int pos) {
//Go to UK Item to show UK data
if (models.get(pos).getName().equals("US")){
//Start Display Activity on click
Toast.makeText(c, "US", Toast.LENGTH_SHORT).show();
Intent intent = new Intent(c, GlobalActivity.class);
c.startActivity(intent);
}
//Go to UK Item to show UK data
if (models.get(pos).getName().equals("UK")){
//Start System Info Activity on click
Toast.makeText(c, "UK", Toast.LENGTH_SHORT).show();
Intent intent = new Intent(c, GlobalActivity.class);
c.startActivity(intent);
}
}
});
}

Answer 1

Now i figure out my solution
I add just Intent.putExtra("data","1"); in every handler click
#Override
public void onBindViewHolder(#NonNull MyHolder holder, int position) {
// Hide data
holder.nameText.setText(models.get(position).getName());
holder.img.setImageResource(models.get(position).getImg());
holder.setItemClickListener(new ItemClickListener() {
#Override
public void onItemClick(View view, int pos) {
//Go to UK Item to show UK data
if (models.get(pos).getName().equals("US")){
//Start Display Activity on click
Toast.makeText(c, "US", Toast.LENGTH_SHORT).show();
Intent intent = new Intent(c, GlobalActivity.class);
intent.putExtra("data","1");
c.startActivity(intent);
}
//Go to UK Item to show UK data
if (models.get(pos).getName().equals("UK")){
//Start System Info Activity on click
Toast.makeText(c, "UK", Toast.LENGTH_SHORT).show();
Intent intent = new Intent(c, GlobalActivity.class);
intent.putExtra("data","2");
c.startActivity(intent);
}
}
});
}

Answer 2

In GlobalActivity i create a method for data
initialize data(); inside onCreate
public class GlobalActivity extends AppCompatActivity
RecyclerView mRecyclerView;
List<User> myUserList;
User mUser;
ProgressDialog progressDialog;
private DatabaseReference db;
private ValueEventListener eventListener;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_global);
progressDialog = new ProgressDialog(this);
progressDialog.setMessage("Please wait its loding..");
mRecyclerView = (RecyclerView) findViewById(R.id.farazList);
GridLayoutManager gridLayoutManager = new GridLayoutManager(AhmedFarazActivity.this, 1);
mRecyclerView.setLayoutManager(gridLayoutManager);
myUserList = new ArrayList<>();
final ReAdapter reAdapter = new ReAdapter(GlobalActivity.this, myUserList);
mRecyclerView.setAdapter(reAdapter);
data();
progressDialog.show();
eventListener = db.addValueEventListener(new ValueEventListener() {
#Override
public void onDataChange(DataSnapshot dataSnapshot) {
myUserList.clear();
for (DataSnapshot ds : dataSnapshot.getChildren()) {
User userData = ds.getValue(User.class);
myUserList.add(userData);
}
reAdapter.notifyDataSetChanged();
progressDialog.dismiss();
}
#Override
public void onCancelled(DatabaseError databaseError) {
progressDialog.dismiss();
}
});
}
method for getting
public void data() {
String data = getIntent().getStringExtra("data");
if (data.equals("1")) {
db = FirebaseDatabase.getInstance().getReference().child("Spinner").child("India");
db.keepSynced(true);
} else if (data.equals("2")) {
db = FirebaseDatabase.getInstance().getReference().child("Spinner").child("Pak");
db.keepSynced(true);
} else if (data.equals("3")) {
db = FirebaseDatabase.getInstance().getReference().child("Spinner").child("UK");
db.keepSynced(true);
}
}