[英]Android recyclerview search filter not working
更新数据但不更改。 原因是什么? 我尝试了很多方法,但都没有奏效。 无论我写什么,结果都不会改变。 名单还是一样的。 我在哪里做错了? 我确定适配器已更新。 因为我查过了。 问题一定是别的。
主要活动
@Override
public boolean onCreateOptionsMenu(final Menu menu) {
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.main_menu, menu);
SearchManager searchManager =
(SearchManager) getSystemService(Context.SEARCH_SERVICE);
SearchView searchView =
(SearchView) menu.findItem(R.id.app_bar_search).getActionView();
searchView.setQueryHint("Search Customer");
searchView.setSearchableInfo(
searchManager.getSearchableInfo(getComponentName()));
searchView.setOnQueryTextListener(new SearchView.OnQueryTextListener() {
@Override
public boolean onQueryTextSubmit(String query) {
return true;
}
@Override
public boolean onQueryTextChange(String newText) {
mAdapter.getFilter().filter(newText);
return true;
}
});
return true;
}
适配器
PlaylistAdapter(Context c,List<M3UItem> list) {
mContext = c;
mInflater = LayoutInflater.from(mContext);
this.mItem = list;
this.list = list;
}
@Override
public Filter getFilter() {
return new Filter() {
@Override
protected FilterResults performFiltering(CharSequence charSequence) {
String charString = charSequence.toString();
if (charString.isEmpty()) {
list = mItem;
} else {
List<M3UItem> filteredList = new ArrayList<>();
for (M3UItem row : filteredList) {
// name match condition. this might differ depending on your requirement
// here we are looking for name or phone number match
if (row.getItemName().toLowerCase().contains(charString.toLowerCase()) ) {
filteredList.add(row);
}
}
list = filteredList;
}
FilterResults filterResults = new FilterResults();
filterResults.values = list;
return filterResults;
}
@Override
protected void publishResults(CharSequence charSequence, FilterResults filterResults) {
list = (ArrayList<M3UItem>) filterResults.values;
notifyDataSetChanged();
// refresh the list with filtered data
}
};
}
编辑:
onBindViewHolder
@Override
public void onBindViewHolder(final ItemHolder holder, final int position) {
final M3UItem item = mItem.get(position);
if (item != null) {
holder.update(item);
}
}
İtemHolder 更新
void update(M3UItem item) {
try {
name.setText(item.getItemName());
int color = generator.getRandomColor();
if (item.getItemIcon().isEmpty()) {
textDrawable = TextDrawable.builder()
.buildRoundRect(String.valueOf(item.getItemName().charAt(0)), color, 100);
cImg.setImageDrawable(textDrawable);
} else {
if (Utils.getInstance().isNetworkAvailable(mContext)) {
Glide.with(mContext).load(item.getItemIcon()).into(cImg);
} else {
textDrawable = TextDrawable.builder()
.buildRoundRect(String.valueOf(item.getItemName().charAt(0)), color, 100);
cImg.setImageDrawable(textDrawable);
}
}
} catch (Exception ignored) {
}
}
MainActivity 加载项:
@Override
protected Boolean doInBackground(String... strings) {
try { //new FileInputStream (new File(name)
is = new FileInputStream(new File(strings[0])); // if u r trying to open file from asstes InputStream is = getassets.open(); InputStream
final M3UPlaylist playlist = parser.parseFile(is);
runOnUiThread(new Runnable() {
@Override
public void run() {
// Stuff that updates the UI
mAdapter.update(playlist.getPlaylistItems());
mAdapter.notifyDataSetChanged();
}
});
return true;
} catch (Exception e) {
Log.d("Google2", "_loadFile: " + e.toString());
return false;
}
}
问题在于您的 onBindViewHolder 和 getItemCount 尝试在您的适配器 class 中进行此更改
@Override
public void onBindViewHolder(final ItemHolder holder, final int position) {
final M3UItem item = list.get(position);
if (item != null) {
holder.update(item);
}
}
@Override
public int getItemCount() {
return list.size();
}
您还需要更改过滤器代码并像这样修改它
List<M3UItem> filteredList = new ArrayList<>();
for (M3UItem row : mItem) {
// name match condition. this might differ depending on your requirement
// here we are looking for name or phone number match
if (row.getItemName().toLowerCase().contains(charString.toLowerCase()) ) {
filteredList.add(row);
}
}
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