How to get a list of all items from the Firebase Database?

This method in 'com.google.firebase: firebase-database: 16.0.1' does not work

private FirebaseAuth mAuth; private DatabaseReference myRef; FirebaseUser user = mAuth.getInstance().getCurrentUser(); FirebaseListAdapter mAdapter; private EditText ET_new_task; private Button Btn_new_task; ListView ListUserTasks; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_list_tasks); ListUserTasks = findViewById(R.id.discr_for_task); myRef = FirebaseDatabase.getInstance().getReference(); mAdapter = new FirebaseListAdapter<String>(this, String.class, android.R.layout.simple_list_item_1, myRef.child(user.getUid()).child("Tasks")) { @Override protected void populateView(View v, String s, int position) { TextView text = v.findViewById(android.R.id.text1); text.setText(s); } }; ListUserTasks.setAdapter(mAdapter); Btn_new_task = findViewById(R.id.btn_add); ET_new_task = findViewById(R.id.et_new_tasks); Btn_new_task.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { myRef.child(user.getUid()).child("Tasks").push().setValue(ET_new_task.getText().toString()); } }); }
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1 answer 1

Understood. Required:

  myRef.getRoot().addValueEventListener(new ValueEventListener() { @Override public void onDataChange(DataSnapshot dataSnapshot) { for (DataSnapshot childDataSnapshot : dataSnapshot.getChildren()) { Timber.d(childDataSnapshot.getKey() + " " + childDataSnapshot.getValue()); } } @Override public void onCancelled(DatabaseError databaseError) { } });