Java-FirebaseUI RecycleView搜索不起作用
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内容图文
这是我的SearchGetterSetter.java代码：
package com.me.Admin;
public class SearchGetterSetter {
String fname;
public SearchGetterSetter(String fname) {
this.fname = fname;
}
public String getFname() {
return fname;
}
public void setFname(String fname) {
this.fname = fname;
}
}
这是我的SearchUserActivity.java代码
package com.me.Admin;
import android.support.annotation.NonNull;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.EditText;
import android.widget.ImageButton;
import android.widget.TextView;
import android.widget.Toast;
import com.firebase.ui.database.FirebaseRecyclerAdapter;
import com.firebase.ui.database.FirebaseRecyclerOptions;
import com.google.firebase.FirebaseException;
import com.google.firebase.database.DatabaseReference;
import com.google.firebase.database.FirebaseDatabase;
import com.google.firebase.database.Query;
import com.infoters.killansfitnessstudio.R;
public class SearchUserActivity extends AppCompatActivity {
private EditText SearchTxt;
private ImageButton SearchBtn;
private RecyclerView SearchRV;
private DatabaseReference mUserDatabase;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_search_user);
mUserDatabase = FirebaseDatabase.getInstance().getReference("users");
SearchTxt = findViewById(R.id.SearchUserTxt);
SearchBtn = findViewById(R.id.SearchUserBtn);
SearchRV = findViewById(R.id.SearchUserRV);
SearchRV.setHasFixedSize(true);
SearchRV.setLayoutManager(new LinearLayoutManager(this));
SearchBtn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
String searchText = SearchTxt.getText().toString();
firebaseUserSearch(searchText);
}
});
}
private void firebaseUserSearch(String searchText) {
Query firebaseSearchQuery = mUserDatabase.child("fname");
FirebaseRecyclerOptions<SearchGetterSetter> response = new
FirebaseRecyclerOptions.
Builder<SearchGetterSetter>
().setQuery(firebaseSearchQuery,SearchGetterSetter.class).build();
FirebaseRecyclerAdapter<SearchGetterSetter,UserViewHolder> Fire = new
FirebaseRecyclerAdapter<SearchGetterSetter, UserViewHolder>(response){
@NonNull
@Override
public UserViewHolder onCreateViewHolder(@NonNull ViewGroup
viewGroup, int i) {
View view = LayoutInflater.from(viewGroup.getContext())
.inflate(R.layout.search_user_item, viewGroup, false);
return new UserViewHolder(view);
}
@Override
protected void onBindViewHolder(@NonNull UserViewHolder holder, int
position, @NonNull SearchGetterSetter model) {
holder.fName.setText(model.getFname());
}
};
Fire.notifyDataSetChanged();
SearchRV.setAdapter(Fire);
}
public class UserViewHolder extends RecyclerView.ViewHolder{
private TextView fName;
public UserViewHolder(@NonNull View itemView) {
super(itemView);
fName = itemView.findViewById(R.id.SUTxt);
}
}
}
我想从Firebase实时数据库中搜索fname.在搜索按钮上,按,我正在调用firebaseUserSearch()方法.
我尝试了几种方法,但对我没有用.我想我做错FirebaseRecycleViewAdapter了.我提到this.我要去哪里错了？
编辑：
这是我的数据库结构
更新的代码：
public class SearchUserActivity extends AppCompatActivity {
private EditText SearchTxt;
private ImageButton SearchBtn;
private RecyclerView SearchRV;
private DatabaseReference mUserDatabase;
private FirebaseRecyclerAdapter<SearchGetterSetter,UserViewHolder> Fire;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_search_user);
mUserDatabase = FirebaseDatabase.getInstance().getReference("users");
SearchTxt = findViewById(R.id.SearchUserTxt);
SearchBtn = findViewById(R.id.SearchUserBtn);
SearchRV = findViewById(R.id.SearchUserRV);
// SearchRV.setHasFixedSize(true);
SearchRV.setLayoutManager(new LinearLayoutManager(this));
SearchBtn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
String searchText = SearchTxt.getText().toString();
firebaseUserSearch(searchText);
Toast.makeText(SearchUserActivity.this, "Clicked",
Toast.LENGTH_SHORT).show();
}
});
}
private void firebaseUserSearch(String searchText) {
Query firebaseSearchQuery = mUserDatabase.orderByChild("fname").startAt(searchText).endAt(searchText + "\uf8ff");
FirebaseRecyclerOptions<SearchGetterSetter> response = new FirebaseRecyclerOptions.
Builder<SearchGetterSetter>().setQuery(firebaseSearchQuery,SearchGetterSetter.class).build();
Fire = new FirebaseRecyclerAdapter<SearchGetterSetter, UserViewHolder>(response){
@NonNull
@Override
public UserViewHolder onCreateViewHolder(@NonNull ViewGroup viewGroup, int i) {
View view = LayoutInflater.from(viewGroup.getContext())
.inflate(R.layout.search_user_item, viewGroup, false);
return new UserViewHolder(view);
}
@Override
protected void onBindViewHolder(@NonNull UserViewHolder holder,
int position, @NonNull SearchGetterSetter model) {
holder.fname.setText(model.getFname());
}
};
Fire.startListening();
Fire.notifyDataSetChanged();
SearchRV.setAdapter(Fire);
}
public static class UserViewHolder extends RecyclerView.ViewHolder{
private TextView fname;
public UserViewHolder(@NonNull View itemView) {
super(itemView);
fname = (TextView) itemView.findViewById(R.id.SUTxt);
}
}
}
解决方法:
您的此声明：
Query firebaseSearchQuery = mUserDatabase.child("fname");
应该
Query firebaseSearchQuery = mUserDatabase.orderByChild("fname").equals(searchText);
如我所见,您的代码中没有在查询中使用searchText变量.
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