删除 ListView 中 ArrayAdapter<String> 中的项目 [重复]

Posted 2023-04-15

【中文标题】删除 ListView 中 ArrayAdapter<String> 中的项目 [重复]

【英文标题】：Remove item in ArrayAdapter<String> in ListView [duplicate]

【发布时间】：2013-08-28 23:23:50

【问题描述】：

我想删除 ListView 中被点击的项目。

解决办法是用ArrayList代替String[];

这是我的代码：

公共类 MyDialogFragment 扩展 DialogFragment

@Override
public Dialog onCreateDialog(Bundle savedInstanceState) 

    AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
    builder.setTitle("Critères Supplémentaires");
    builder.setNegativeButton("Cancel",
            new DialogInterface.OnClickListener() 
                public void onClick(DialogInterface dialog, int whichButton) 
                    onCancel(dialog);
                
            
    );

    LayoutInflater inflater = (LayoutInflater) getActivity().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    View mView = inflater.inflate(R.layout.fragment_dialog, null);
    ListView mListView = (ListView) mView.findViewById(R.id.lvListe);

    String[] mValues = "Orientation", "Nombre de Chambres", "Nombre de Salle de bains", "Nombre de toilettes", "Cave", "Parking", "Garage", "Jardin";

    final ArrayAdapter<String> adapter = new ArrayAdapter<String>(getActivity(), android.R.layout.simple_list_item_1, mValues);
    mListView.setAdapter(adapter);
    mListView.setOnItemClickListener(new android.widget.AdapterView.OnItemClickListener() 
        @Override
        public void onItemClick(AdapterView<?> parent, View view, int position, long id) 
            String item = (String) parent.getItemAtPosition(position);
            adapter.remove(adapter.getItem(position));
            adapter.notifyDataSetChanged();
            Toast.makeText(getActivity(), "You selected : " + item, Toast.LENGTH_SHORT).show();
        
    );
    builder.setView(mListView);

    return builder.create();

但是 adapter.remove() 导致应用程序崩溃并出现此错误：

java.lang.UnsupportedOperationException

如果我想删除一个项目我应该怎么做？

提前致谢:)

【参考方案1】：

      String[] mValues = "Orientation", "Nombre de Chambres", "Nombre de Salle de bains", "Nombre de toilettes", "Cave", "Parking", "Garage", "Jardin";

       final ArrayList<String> list =new ArrayList<String>(Arrays.asList(mValues));  
        final ArrayAdapter<String> adapter = new ArrayAdapter<String>(getActivity(), android.R.layout.simple_list_item_1, list);
        mListView.setAdapter(adapter);
        mListView.setOnItemClickListener(new android.widget.AdapterView.OnItemClickListener() 
            @Override
            public void onItemClick(AdapterView<?> parent, View view, int position, long id) 
                String item = list.get(position);
                list.remove(position);
                adapter.notifyDataSetChanged();
                Toast.makeText(getActivity(), "You selected : " + item, Toast.LENGTH_SHORT).show();
            
        );

【参考方案2】：

这样做

mListView.setOnItemClickListener(new android.widget.AdapterView.OnItemClickListener() 
            @Override
            public void onItemClick(AdapterView<?> parent, View view, int position, long id) 
                String item = (String) adapter.getItem(position);
                adapter.remove(adapter.getItem(position));
                adapter.notifyDataSetChanged();
                Toast.makeText(getActivity(), "You selected : " + item, Toast.LENGTH_SHORT).show();
            
        );