我有收藏夹片段和FavoritesListAdapter。在PlayRadioFragment中,可以使用按钮添加收藏夹列表。当我这样做时,收藏夹列表视图以错误的顺序填充。并且无线电名称和无线电播放链接无法正确匹配。与删除收藏夹按钮相同。我想这是因为使用HashMap获取键值。我该怎么办?提前谢谢。
PlayRadioFragment中的add_favorites_button:
add_favorites_button= (Button) view.findViewById(R.id.add_favorites_button);
add_favorites_button.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
SharedPreferences settings = getActivity().getSharedPreferences("PREFS_", 0);
SharedPreferences.Editor editor = settings.edit();
editor.putString(radio_name, radio_name);
editor.commit();
SharedPreferences settings_2 = getActivity().getSharedPreferences("PREFS_2",0);
SharedPreferences.Editor editor_2 = settings_2.edit();
editor_2.putString(radio_play_link, radio_play_link);
editor_2.commit();
}
});
键值在FavoritesFragment中发送并发送到FavoriteListAdapter:
final List<String> radio_name_list = new ArrayList<>();
final List<String> radio_name_list_key = new ArrayList<>();
final List<String> radio_link_list = new ArrayList<>();
final List<String> radio_link_list_key = new ArrayList<>();
String radio_name = "";
String radio_name_key = "";
String radio_link = "";
String radio_link_key = "";
Map<String, ?> allEntries = getActivity().getSharedPreferences("PREFS_",0).getAll();
for (Map.Entry<String, ?> entry : allEntries.entrySet()) {
radio_name_key = entry.getKey();
radio_name_list_key.add(radio_name_key);
radio_name = entry.getValue().toString();
radio_name_list.add(radio_name);
}
Map<String, ?> allEntries_2 = getActivity().getSharedPreferences("PREFS_2",0).getAll();
for (Map.Entry<String, ?> entry : allEntries_2.entrySet()) {
radio_link_key = entry.getKey();
radio_link_list_key.add(radio_link_key);
radio_link = entry.getValue().toString();
radio_link_list.add(radio_link);
}
ListView listView_favorites = (ListView) view.findViewById(R.id.listview_favorites);
adapter_2 = new FavoritesListAdapter(getActivity(), radio_name_list, radio_name_list_key, radio_link_list, radio_link_list_key);
listView_favorites.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> adapterView, View view, int position, long l) {
PlayRadioFragment fragment= new PlayRadioFragment();
Bundle bundle= new Bundle();
FragmentTransaction fragmentTransaction = getActivity().getSupportFragmentManager().beginTransaction();
bundle.putString("radio_play_links", radio_link_list.get(position));
bundle.putString("radio_name", radio_name_list.get(position));
fragment.setArguments(bundle);
fragmentTransaction.addToBackStack(null);
fragmentTransaction.replace(R.id.frame_layout,fragment);
fragmentTransaction.commit();
}
});
和FavoriteListAdapter,相关的广播和链接正在删除列表元素上的删除按钮:
public class FavoritesListAdapter extends ArrayAdapter<String > {
private Activity context;
private List<String> radioName;
private List<String> radio_links;
private List<String> radio_links_key;
private List<String> radioname_key;
public FavoritesListAdapter(Activity context,List<String> radioName, List<String> radioname_key, List<String> radio_links, List<String> radio_links_key ) {
super(context, R.layout.custom_favorites_listview, radioName);
this.context=context;
this.radio_links_key= radio_links_key;
this.radio_links= radio_links;
this.radioName=radioName;
this.radioname_key= radioname_key;
}
@NonNull
@Override
public View getView(final int position, View convertView, final ViewGroup parent) {
View r= convertView;
FavoritesViewHolder viewHolder = null;
if (r == null) {
LayoutInflater layoutInflater= context.getLayoutInflater();
r= layoutInflater.inflate(R.layout.custom_favorites_listview,null,true);
viewHolder = new FavoritesViewHolder(r);
r.setTag(viewHolder);
}
else {
viewHolder = (FavoritesViewHolder) r.getTag();
}
viewHolder.row_tv_favorites_radio_name.setText(radioName.get(position));
viewHolder.row_img_favorites_radio_icon.setImageResource(R.drawable.radio_logo_renkli);
viewHolder.button_remove_from_favorites_list.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
SharedPreferences settings = context.getSharedPreferences("PREFS_", 0);
SharedPreferences.Editor editor = settings.edit();
editor.remove(radioName.get(position));
editor.remove(radioname_key.get(position));
editor.commit();
SharedPreferences settings_2 = context.getSharedPreferences("PREFS_2",0);
SharedPreferences.Editor editor_2 = settings_2.edit();
editor_2.remove(radio_links.get(position));
editor_2.remove(radio_links_key.get(position));
editor_2.commit();
radioName.remove(getItem(position));
// notifyDataSetChanged();
FavoritesFragment.adapter_2.notifyDataSetChanged();
}
});
return r;
}
class FavoritesViewHolder {
TextView row_tv_favorites_radio_name;
TextView row_tv_favorites_listener_numbers;
ImageView row_img_favorites_radio_icon;
Button button_remove_from_favorites_list;
FavoritesViewHolder(View v) {
row_tv_favorites_radio_name= (TextView) v.findViewById(R.id.txt_radio_name_favorites);
row_tv_favorites_listener_numbers = (TextView) v.findViewById(R.id.txt_listener_numbers_favorites);
row_img_favorites_radio_icon = (ImageView) v.findViewById(R.id.img_radio_icon_favorites);
button_remove_from_favorites_list = (Button) v.findViewById(R.id.remove_favorites_from_list_button);
}
}
}