[英]My realtime database of Firebase is not loading any data on the console also for rules
[英]firebase database or my listview is duplicating data after first few items
我正在使用 firebase 數據庫和 glide 訪問存儲在 firebase 存儲中的圖像。 但是當我運行代碼時,它似乎在前 6 個之后重復了這些項目。這是我的數據庫參考
ref = db.getReference().child("LOGOS");
在我的數據庫中看起來像這樣
{
"70s": "My FirebaseStorage https web address",
"80s": "My FirebaseStorage https web address",
"90s": "My FirebaseStorage https web address",
"COMMERCIAL": "My FirebaseStorage https web address",
"DANCE": "My FirebaseStorage https web address",
"HIPHOP": "My FirebaseStorage https web address",
"MASHUP": "My FirebaseStorage https web address",
"NEWS": "My FirebaseStorage https web address"
}
那么這是我的編碼
ref.addValueEventListener(new ValueEventListener() {
@Override
public void onDataChange(@NonNull DataSnapshot snapshot) {
Genre_Adapter adapter;
imageUrl.clear();
for (DataSnapshot snapa : snapshot.getChildren()) {
String logo = snapa.getValue(String.class);
imageUrl.add(logo);
// I've added a Log here to see that the data returns the right values and it
// does, but when loaded in to the list view it repeats.
String key = snapa.getKey();
Log.e("KEYS", key);
這些是我的日志中返回的值
this is what is returned when i log.e the string key
2022-08-15 11:47:08.958 19751-19751/com.p9p.radioify E/KEYS: 70S
2022-08-15 11:47:08.959 19751-19751/com.p9p.radioify E/KEYS: 80S
2022-08-15 11:47:08.959 19751-19751/com.p9p.radioify E/KEYS: 90S
2022-08-15 11:47:08.959 19751-19751/com.p9p.radioify E/KEYS: COM
2022-08-15 11:47:08.959 19751-19751/com.p9p.radioify E/KEYS: DANCE
2022-08-15 11:47:08.960 19751-19751/com.p9p.radioify E/KEYS: DRUM & BASS
2022-08-15 11:47:08.960 19751-19751/com.p9p.radioify E/KEYS: HIPHOP
2022-08-15 11:47:08.960 19751-19751/com.p9p.radioify E/KEYS: MASHUP
2022-08-15 11:47:08.960 19751-19751/com.p9p.radioify E/KEYS: NEWS
2022-08-15 11:47:08.960 19751-19751/com.p9p.radioify E/KEYS: TRANCE
2022-08-15 11:47:08.960 19751-19751/com.p9p.radioify E/KEYS: UNITEDKINGDOM
這是我為我的適配器 class 轉換為數組的地方
imageurl = imageUrl.toArray(new String[imageUrl.size()]);
adapter = new Genre_Adapter(getContext(), imageurl);
}#
adapter = new Genre_Adapter(getContext(), imageurl);
mlist.setAdapter(adapter);
mlist.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
genre_list_item gli = new genre_list_item();
Bundle bundle = new Bundle();
bundle.putString("Genre", btntitle.get(position));
Log.i("genre_title", btntitle.get(position));
gli.setArguments(bundle);
getActivity().getSupportFragmentManager().beginTransaction()
.replace(R.id.frame1, gli, "genre_list_item")
.addToBackStack(null).commit();
}
這是我的適配器 class
public Genre_Adapter(Context context,String[]logo){
this. context = context;
this.logo = logo;
}
@Override
public int getCount() {
return logo.length;
}
@Override
public Object getItem(int position) {
return logo[position];
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
final View row;
if (convertView == null) {
row = LayoutInflater.from(parent.getContext()).inflate(R.layout.genre, parent, false);
imageView = row.findViewById(R.id.image);
} else {
row = convertView;
}
Glide.with(context).load(logo[position]).into(imageView);
return (row);
}
**編輯我今天嘗試了這些答案。 這些都沒有奏效。
這是一個如此簡單的解決方法,我可能會因為沒有得到它而自責,我的適配器中的 imageview 被初始化在錯誤的位置。 更換
if (convertView == null) {
row = LayoutInflater.from(parent.getContext()).inflate(R.layout.genre, parent, false);
imageView = row.findViewById(R.id.image);
} else {
row = convertView;
}
Glide.with(context).load(logo[position]).into(imageView);
return (row);
}
和
if (convertView == null) {
row = mLayoutInflater.inflate(R.layout.genre, null);
} else {
row = convertView;
}
imageView = (ImageView) row.findViewById(R.id.image);
Glide.with(context).load(logo[position]).into(imageView);
return row;
}
糾正了問題哈哈
聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.