我试图在使用Firebase作为后端的数据库中进行用户查找。我试图在使用Firebase作为后端的数据库中进行用户搜索。我想通过搜索视图进行搜索,以在recyclerview中显示结果。 但是,当进行搜索时,我的代码没有带来任何结果。
我的代码:
private fun configurarSearchView(view: View) {
view.searchView.setOnQueryTextListener(object : SearchView.OnQueryTextListener {
override fun onQueryTextSubmit(query: String): Boolean {
return false
}
override fun onQueryTextChange(newText: String): Boolean {
if (newText.isNotEmpty()) {
recyclerViewBeta.visibility = View.GONE
recyclerPesquisa.visibility = View.VISIBLE
pesquisarUsuarios(newText.toUpperCase())
Log.i("PESQUISA", newText.toUpperCase())
} else {
recyclerViewBeta.visibility = View.VISIBLE
recyclerPesquisa.visibility = View.GONE
}
return true
}
})
}
private fun pesquisarUsuarios(texto: String) {
Log.i("PESQUISA", "P: $texto")
val query: Query = FirebaseDatabase.getInstance().getReference().child("users").orderByChild("nomePesquisa")
.startAt(texto.toUpperCase()).endAt(texto.toUpperCase() + "\uf8ff")
query.addListenerForSingleValueEvent(object : ValueEventListener {
override fun onDataChange(dataSnapshot: DataSnapshot) {
for (ds in dataSnapshot.children) {
val usuario = ds.getValue(Usuario::class.java)!!
listaPesquisa.add(usuario)
Log.i("PESQUISA", "R: ${usuario.nomeExibicao}")
}
recyclerPesquisa.adapter?.let { it.notifyDataSetChanged() }
val total: Int = listaPesquisa.size
Log.i("PESQUISA", "total$total")
}
override fun onCancelled(databaseError: DatabaseError) {}
})
数据库:
"usuarios" : {
"5P6DzPIEuiSKU5UYGo03AwSMTED3" : {
"email" : "valter@teste.com",
"id" : "5P6DzPIEuiSKU5UYGo03AwSMTED3",
"nickExibicao" : "valter",
"nomeExibicao" : "Valter dos Santos",
"nomePesquisa" : "VALTER DOS SANTOS",
"status" : "1577010585880",
},
为什么不显示数据?如何解决这个问题? 预先感谢!
答案 0 :(得分:2)
您向数据库引用中提供了错误的子级用户,根据您的数据库结构,这些用户应该是用途。尝试使用
FirebaseDatabase.getInstance().getReference()
.child("usuarios")
.orderByChild("nomePesquisa")
.startAt(texto.toUpperCase())
.endAt(texto.toUpperCase() + "\uf8ff")
.addListenerForSingleValueEvent();