Question

public class ShowCustomer extends AppCompatActivity {

FirebaseDatabase database;
DatabaseReference reference;
AddCustomer customer;

private EditText fname;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_show_customer);

    database = FirebaseDatabase.getInstance();
    reference = database.getReference("Customers");
    customer = new AddCustomer();


    reference.addValueEventListener(new ValueEventListener() {
        @Override
        public void onDataChange(DataSnapshot dataSnapshot) {
            for(DataSnapshot ds: dataSnapshot.getChildren() ) {


                customer = ds.getValue(AddCustomer.class);
                fname = (EditText) findViewById(R.id.fnameTxt);
                fname.setKeyListener(null);
                fname.setText(customer.getFname().toString());


            }

        }

        @Override
        public void onCancelled(DatabaseError databaseError) {

        }
    });



}

}

问题：客户名称通过firebase数据库检索显示在列表视图中。如果我点击列表视图中的项目，则需要在另一个活动上显示客户的详细信息。鉴于bellow是listview onItemClickListner的代码段。

listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
                @Override
                public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
                    Intent intent = new Intent(CustomerListView.this, ShowCustomer.class);
                    startActivity(intent);
                }
            });

如果点击列表视图中的任何项目，则会显示最后一个客户的fname。帮我解决这个问题。提前致谢。

这里给出了数据库结构 enter image description here

Answer 1

要解决此问题，请使用以下代码：

DatabaseReference rootRef = FirebaseDatabase.getInstance().getReference();
DatabaseReference customersRef = rootRef.child("Customers");
ValueEventListener eventListener = new ValueEventListener() {
    @Override
    public void onDataChange(DataSnapshot dataSnapshot) {
        List<AddCustomer> list = new ArrayList<>();
        for(DataSnapshot ds : dataSnapshot.getChildren()) {
            AddCustomer addCustomer = ds.getValue(AddCustomer.class);
            list.add(addCustomer);
        }
        ListView listView = (ListView) findViewById(R.id.list_view);
        YourCustomAdapter<AddCustomer> arrayAdapter = new YourCustomAdapter<AddCustomer>(this, list);
        listView.setAdapter(arrayAdapter);
    }

    @Override
    public void onCancelled(DatabaseError databaseError) {}
};
customersRef.addListenerForSingleValueEvent(eventListener);

因此，您只需在.XML文件和自定义适配器中创建ListView。就是这样！

如何通过单击每个单独的项目使列表视图中从firebase检索到的项目显示在文本框中？

1 个答案: