我知道如果我想创建一个新行，我必须插入\n无论我需要在哪里创建该线。但我得到的是没有我在 firebase 数据库中已有的行的文本。有人可以告诉我如何解决这个问题吗？例如，如果我在数据库中有 hello \n world。我明白了hello world。当我真的应该得到它时
hello
world
我需要更改 firebase 或源代码中的某些内容吗？
这就是我从 firebase 获取数据的方式
private void getData(){
firebaseDatabaseInstance = FirebaseDatabase.getInstance();
// get reference to 'users' node
booksInstance = firebaseDatabaseInstance.getReference("monzmat");
books.clear();
books.addAll(db.getAllBookMonzmat());
adapter = new qamoosAdapter(this, books);
gridView.setAdapter(adapter);
booksInstance.addValueEventListener(new ValueEventListener() {
@Override
public void onDataChange(DataSnapshot dataSnapshot) {
storeData(dataSnapshot);
}
@Override
public void onCancelled(DatabaseError error) {
// Failed to read value
Log.w(TAG, "Failed to read value.", error.toException());
}
});
booksInstance.orderByChild("id").addChildEventListener(new ChildEventListener() {
@Override
public void onChildAdded(DataSnapshot dataSnapshot, String s) {
qamoosData book = new qamoosData(
(String) dataSnapshot.child("id").getValue(),
(String) dataSnapshot.child("title").getValue(),
(String)dataSnapshot.child("content").getValue()
);
db.insertMonzmat(book);
reloadData();
}
@Override
public void onChildChanged(DataSnapshot dataSnapshot, String s) {
qamoosData book = new qamoosData(
(String) dataSnapshot.child("id").getValue(),
(String) dataSnapshot.child("title").getValue(),
(String)dataSnapshot.child("content").getValue()
);
db.updateABookMonzmat(book);
reloadData();
}
@Override
public void onChildRemoved(DataSnapshot dataSnapshot) {
qamoosData book = new qamoosData(
(String) dataSnapshot.child("id").getValue(),
(String) dataSnapshot.child("title").getValue(),
(String)dataSnapshot.child("content").getValue()
);
db.deleteABookMonzmat(book.getId());
reloadData();
}
@Override
public void onChildMoved(DataSnapshot dataSnapshot, String s) {
}
@Override
public void onCancelled(DatabaseError databaseError) {
}
});
}
private void storeData(DataSnapshot snapshot) {
books.clear();
for (DataSnapshot alert: snapshot.getChildren()) {
qamoosData book = new qamoosData(
(String)alert.child("id").getValue(),
(String)alert.child("title").getValue(),
(String)alert.child("content").getValue()
);
db.insertMonzmat(book);
}
books.addAll(db.getAllBookMonzmat());
// Constants.hideDialog();
adapter.notifyDataSetChanged();
}
这是我的适配器
public class qamoosAdapter extends BaseAdapter {
Activity activity;
ArrayList<qamoosData> arrayList = new ArrayList<>();
ArrayList<qamoosData> filterList = new ArrayList<>();
LayoutInflater mLayoutInflater;
DBHandler db;
Storage storage;
public qamoosAdapter(Activity context, ArrayList<qamoosData> bookDatas){
this.activity = context;
this.arrayList = bookDatas;
this.db = new DBHandler(context);
this.filterList= bookDatas;
mLayoutInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
storage = SimpleStorage.getInternalStorage(context);
}
@Override
public int getCount() {
return arrayList.size();
}
@Override
public Object getItem(int position) {
return arrayList.get(position);
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
qamoosAdapter.ViewHolder holder = new qamoosAdapter.ViewHolder();
if (convertView == null) {
convertView = mLayoutInflater.inflate(R.layout.fragment_qamoos, null);
holder.name = (TextView) convertView.findViewById(R.id.bookName2_makotab_fragment);
if(holder.name.getText().toString().contains("\n")){
}
convertView.setTag(holder);
} else {
holder = (qamoosAdapter.ViewHolder) convertView.getTag();
}
holder.name.setText(arrayList.get(position).getTitle());
return convertView;
}
public class ViewHolder{
ImageView image;
TextView name;
}
}
