1- Download:
FirebaseDatabase database=FirebaseDatabase.getInstance();
DatabaseReference reference=database.getReference();
reference.addValueEventListener(new ValueEventListener() {
@Override
public void onDataChange(DataSnapshot dataSnapshot) {
try {
//parse data snapshot in another thread.
}catch (Exception e){
}
}
@Override
public void onCancelled(DatabaseError databaseError) {
}
});
//=========================== 2- Parse: HashMap d = (HashMap) dataSnapshot.getValue(); HashMap users=((HashMap) d.get("users"));
3- Update ListView/EditText or use users(Hashmap)
4- Update:
String nameString= nameEditText.getText().toString();
FirebaseDatabase database = FirebaseDatabase.getInstance();
// getting database reference for the user that needs to be updated.
DatabaseReference databaseReference = database.getReference().child("users").child(userId);
Map<String, Object> taskMap = new HashMap<String, Object>();
taskMap.put("name", nameString);
databaseReference.updateChildren(taskMap).addOnCompleteListener(new OnCompleteListener<Void>() {
@Override
public void onComplete(@NonNull Task<Void> task) {
Log.d("", "task is: " + task);
if(task.isSuccessful()){
Toast.makeText(getActivity(),"Commit is successfull", Toast.LENGTH_LONG).show();
}else{
Toast.makeText(getActivity(),"Commit is failed", Toast.LENGTH_LONG).show();
}
}
});
databaseReference.addValueEventListener(new ValueEventListener() {
@Override
public void onDataChange(DataSnapshot dataSnapshot) {
Object value = dataSnapshot.getValue();
Log.d("", "Value is: " + value);
}
@Override
public void onCancelled(DatabaseError error) {
// Failed to read value
Log.w(TAG, "Failed to save value.", error.toException());
}
});
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