Java SearchData方法重置查询?Firebase数据库Android
一般来说,问题是,我有三个片段。在第二个代码段中,它获取提供的数据,下面是代码 1) MyPostFragment.classJava SearchData方法重置查询?Firebase数据库Android,java,android,firebase,firebase-realtime-database,Java,Android,Firebase,Firebase Realtime Database,一般来说,问题是,我有三个片段。在第二个代码段中,它获取提供的数据,下面是代码 1) MyPostFragment.class public class MyPostsFragment extends PostListFragment { public MyPostsFragment() {} @Override public Query getQuery(DatabaseReference databaseReference) { return databaseReference.c
public class MyPostsFragment extends PostListFragment {
public MyPostsFragment() {}
@Override
public Query getQuery(DatabaseReference databaseReference) {
return databaseReference.child("songsDB")
.orderByChild("stars/" + getUid())
.equalTo(true);
}
2) 后列表片段
public abstract class PostListFragment extends Fragment {
private DatabaseReference mDatabase;
private FirebaseRecyclerAdapter mAdapter;
private RecyclerView mRecycler;
private Activity mActivity;
Query mRef;
SearchView searchView;
LinearLayoutManager mManager;
FirebaseDatabase mFirebaseDatabase;
public PostListFragment() {
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
super.onCreateView(inflater, container, savedInstanceState);
View rootView = inflater.inflate(R.layout.fragment_all_posts, container, false);
mRecycler = rootView.findViewById(R.id.messages_list);
mRecycler.setHasFixedSize(true);
mDatabase = FirebaseDatabase.getInstance().getReference();
return rootView;
}
@Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
setHasOptionsMenu(true);
// Set up Layout Manager, reverse layout
mManager = new LinearLayoutManager(getActivity());
mManager.setReverseLayout(true);
mManager.setStackFromEnd(true);
mRecycler.setLayoutManager(mManager);
Query postsQuery = getQuery(mDatabase);
ShowData(postsQuery);
}
@Override
public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
inflater.inflate(R.menu.menu_main, menu);
MenuItem item = menu.findItem(R.id.action_search);
searchView = (SearchView) MenuItemCompat.getActionView(item);
searchView.setOnQueryTextListener(new SearchView.OnQueryTextListener() {
@Override
public boolean onQueryTextSubmit(String query) {
SearchData(query);
return false;
}
@Override
public boolean onQueryTextChange(String newText) {
//Filter as you type
SearchData(newText);
return false;
}
});
super.onCreateOptionsMenu(menu,inflater);
}
private FirebaseRecyclerAdapter getMAdapter(Query query){
mActivity = getActivity();
final Dialog mDialog = new Dialog(mActivity, R.style.NewDialog);
mDialog.addContentView(
new ProgressBar(mActivity),
new LinearLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT, LinearLayout.LayoutParams.WRAP_CONTENT)
);
mDialog.setCancelable(true);
mDialog.show();
FirebaseRecyclerOptions<Post> options = new FirebaseRecyclerOptions.Builder<Post>()
.setQuery(query, Post.class)
.build();
mAdapter = new FirebaseRecyclerAdapter<Post, PostViewHolder>(options) {
@Override
protected void onBindViewHolder(PostViewHolder viewHolder, int position, final Post model) {
final DatabaseReference postRef = getRef(position);
// Determine if the current user has liked this post and set UI accordingly
if (model.stars.containsKey(getUid())) {
viewHolder.starView.setImageResource(R.drawable.ic_toggle_star_24);
} else {
viewHolder.starView.setImageResource(R.drawable.ic_toggle_star_outline_24);
}
if (!TextUtils.isEmpty(model.kzSongytblink))
viewHolder.mImage.setImageResource(R.drawable.on_line_logo);
else viewHolder.mImage.setImageResource(R.drawable.off_line_logo);
// Bind Post to ViewHolder, setting OnClickListener for the star button
viewHolder.bindToPost(model, new View.OnClickListener() {
@Override
public void onClick(View starView) {
// Need to write to both places the post is stored
DatabaseReference globalPostRef = mDatabase.child("songsDB").child(postRef.getKey());
// Run two transactions
onStarClicked(globalPostRef);
}
});
viewHolder.itemView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent intent = new Intent(mActivity, PostDetailActivity.class);
intent.putExtra(PostDetailActivity.EXTRA_POST_KEY, postRef.getKey());
startActivity(intent);
}
});
}
@Override
public PostViewHolder onCreateViewHolder(ViewGroup viewGroup, int viewType) {
LayoutInflater inflater = LayoutInflater.from(viewGroup.getContext());
return new PostViewHolder(inflater.inflate(R.layout.item_post, viewGroup, false));
}
};
return mAdapter;
}
public void ShowData(Query postsQuery) {
mAdapter=getMAdapter(postsQuery);
mRecycler.setAdapter(mAdapter);
}
public void SearchData(String searchText){
//SearchData
mFirebaseDatabase = FirebaseDatabase.getInstance();
mRef = FirebaseDatabase.getInstance().getReference("songsDB");
Query postsQuery= mRef.orderByChild("kzSongTitle").startAt(searchText).endAt(searchText + "\uf8ff");
mAdapter=getMAdapter(postsQuery);
mRecycler.setAdapter(mAdapter);
}
@Override
public void onStart() {
super.onStart();
if (mAdapter != null) {
mAdapter.startListening();
}
}
@Override
public void onStop() {
super.onStop();
if (mAdapter != null) {
mAdapter.stopListening();
}
}
private void onStarClicked(DatabaseReference postRef) {
postRef.runTransaction(new Transaction.Handler() {
@Override
public Transaction.Result doTransaction(MutableData mutableData) {
Post p = mutableData.getValue(Post.class);
if (p == null) {
return Transaction.success(mutableData);
}
if (p.stars.containsKey(getUid())) {
// Unstar the post and remove self from stars
p.starCount = p.starCount - 1;
p.stars.remove(getUid());
} else {
// Star the post and add self to stars
p.starCount = p.starCount + 1;
p.stars.put(getUid(), true);
}
// Set value and report transaction success
mutableData.setValue(p);
return Transaction.success(mutableData);
}
@Override
public void onComplete(DatabaseError databaseError, boolean b, DataSnapshot dataSnapshot) {
Log.d("postTransaction", "onComplete:" + dataSnapshot.getKey());
}
});
}
public String getUid() {
return FirebaseAuth.getInstance().getCurrentUser().getUid();
}
public abstract Query getQuery(DatabaseReference databaseReference);
公共抽象类PostListFragment扩展了片段{
私有数据库参考数据库;
私人FirebaseRecyclerAdapter mAdapter;
私人垃圾回收站;
私人活动能力;
查询mRef;
搜索视图搜索视图;
直线布局经理/经理;
FirebaseDatabase mFirebaseDatabase;
公共PostListFragment(){
}
@凌驾
CreateView上的公共视图(布局、充气机、视图组容器、捆绑包保存状态){
super.onCreateView(充气机、容器、保存状态);
视图根视图=充气机。充气(R.layout.fragment\u所有柱,容器,假);
mRecycler=rootView.findviewbyd(R.id.messages\u列表);
mRecycler.setHasFixedSize(true);
mDatabase=FirebaseDatabase.getInstance().getReference();
返回rootView;
}
@凌驾
已创建ActivityState上的公共无效(Bundle savedInstanceState){
super.onActivityCreated(savedInstanceState);
设置选项菜单(真);
//设置布局管理器,反向布局
mManager=newlinearlayoutmanager(getActivity());
mManager.setReverseLayout(true);
mManager.setStackFromEnd(true);
mRecycler.setLayoutManager(mManager);
Query postsQuery=getQuery(mDatabase);
ShowData(postsQuery);
}
@凌驾
创建选项菜单(菜单菜单,菜单充气机){
充气机。充气(右菜单。主菜单,菜单);
MenuItem=menu.findItem(R.id.action\u search);
searchView=(searchView)MenuItemCompat.getActionView(项);
searchView.setOnQueryTextListener(新的searchView.OnQueryTextListener(){
@凌驾
公共布尔值onQueryTextSubmit(字符串查询){
搜索数据(查询);
返回false;
}
@凌驾
公共布尔onQueryTextChange(字符串newText){
//键入时进行筛选
搜索数据(新文本);
返回false;
}
});
super.onCreateOptions菜单(菜单,充气机);
}
私有FirebaseRecyclerAdapter getMAdapter(查询){
mActivity=getActivity();
最终对话框mDialog=新对话框(mActivity,R.style.NewDialog);
mDialog.addContentView(
新ProgressBar(mActivity),
新建LinearLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_内容,LinearLayout.LayoutParams.WRAP_内容)
);
mDialog.setCancelable(真);
mDialog.show();
FirebaseRecyclerOptions选项=新建FirebaseRecyclerOptions.Builder()
.setQuery(查询,Post.class)
.build();
mAdapter=新FirebaseRecyclerAdapter(选项){
@凌驾
受保护的无效onBindViewHolder(PostViewHolder、int位置、最终Post模型){
最终数据库参考postRef=getRef(位置);
//确定当前用户是否喜欢此帖子,并相应地设置UI
if(model.stars.containsKey(getUid())){
viewHolder.rightView.setImageResource(R.drawable.ic_toggle_star_24);
}否则{
viewHolder.饥饿视图.setImageResource(R.drawable.ic\u开关\u星形\u轮廓\u 24);
}
如果(!TextUtils.isEmpty(model.kzsongytlink))
viewHolder.mImage.setImageResource(R.drawable.on_line_logo);
else viewHolder.mImage.setImageResource(R.drawable.off_line_logo);
//将Post绑定到ViewHolder,为星形按钮设置OnClickListener
viewHolder.bindToPost(model,newview.OnClickListener(){
@凌驾
公共void onClick(视图视图){
//需要写到帖子存储的两个位置
DatabaseReference globalPostRef=mDatabase.child(“songsDB”).child(postRef.getKey());
//运行两个事务
onStarClicked(globalPostRef);
}
});
viewHolder.itemView.setOnClickListener(新视图.OnClickListener(){
@凌驾
公共void onClick(视图v){
意向意向=新意向(mActivity,PostDetailActivity.class);
intent.putExtra(PostDetailActivity.EXTRA_POST_KEY,postRef.getKey());
星触觉(意向);
}
});
}
@凌驾
public PostViewHolder onCreateViewHolder(ViewGroup ViewGroup,int viewType){
LayoutInflater充气器=LayoutInflater.from(viewGroup.getContext());
返回新的PostViewHolder(充气器。充气(R.layout.item_post,viewGroup,false));
}
};
返回mAdapter;
}
公共void ShowData(查询postsQuery){
mAdapter=getMAdapter(postsQuery);
mRecycler.setAdapter(mAdapter);
}
public void SearchData(字符串searchText){
//搜索数据
mFirebaseDatabase=FirebaseDatabase.getInstance();
mRef=FirebaseDatabase.getInstance().getReference(“songsDB”);
Query postsQuery=mRef.orderByChild(“kzsongtile”).startAt(searchText).endAt(searchText+“\uf8ff”);
mAdapter=getMAdapter(postsQuery);
mRecycler.setAdapter(mAdapter);
}
@凌驾
public void onStart(){
super.onStart();
如果(mAdapter!=null){
mAdapter.startListening();
}
}
@凌驾
公共void onStop(){
super.onStop();
如果(mAdapter!=null){
mAdapter.stopListening();
}
}
私有void onStarClicked(数据库引用postRef){
postRef.runTransaction(新事务处理程序(){
@凌驾
公共事务.Result doTransaction(MutableData MutableData){
Post p=mutableData.getValue(Post.class);
if(p==null){
返回事务。成功(可变数据);
}
if(p.stars.containsKey(getUid())){
//解开柱子,把自己从星星上移开
p、 星数=