android - ListView 中的 EditText 在滚动时丢失内容

Question

我一直在努力寻找解决我的问题的方法，但没有一个对我有用。 :/我在每个列表项中都有一个带有编辑文本的 ListView ，当向下滚动并再次向上滚动时，已编辑编辑文本的内容已丢失或其他编辑文本已采用他的值。

请帮我一些

主要 Activity :-

public class MainActivity extends AppCompatActivity {

    private ArrayList<Friend> friendArrayList;
    ListViewAdapter adapter;

    String[] countriessArray =  { "USA", "USA", "USA", "USA",
            "China", "Japan", "France", "USA","USA", "USA", "USA", "USA",
            "China", "Japan", "France", "USA"};

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main_layout);

        friendArrayList = new ArrayList<Friend>();
        for (int i = 0; i < countriessArray.length; i++) {

            Friend item = new Friend(countriessArray[i]);
            friendArrayList.add(item);
        }

        ListView listView = (ListView) findViewById(R.id.list);
        listView.setItemsCanFocus(true);

        adapter = new ListViewAdapter(this, R.layout.item_listview, friendArrayList);

        listView.setAdapter(adapter);
    }

ListViewAdaper:-

public class ListViewAdapter extends ArrayAdapter<Friend> {

    ViewHolder holder;
    private List<Friend> myFriends;
    private Activity activity;

    public static HashMap<Integer,String> myList=new HashMap<Integer,String>();

    public ListViewAdapter(Activity context, int resource, List<Friend> objects) {

        super(context, resource, objects);
        this.activity = context;
        this.myFriends = objects;
    }

    @Override
    public View getView(final int position, View convertView, ViewGroup parent) {

        LayoutInflater inflater = (LayoutInflater) activity.getSystemService(Activity.LAYOUT_INFLATER_SERVICE);
        final int viewpos = position;

        // If holder not exist then locate all view from UI file.
        if (convertView == null) {
            // inflate UI from XML file
            convertView = inflater.inflate(R.layout.item_listview, parent, false);
            // get all UI view
            holder = new ViewHolder(convertView);
            convertView.setTag(holder);

        } else {
            // if holder created, get tag from view
            holder = (ViewHolder) convertView.getTag();
        }

        holder.friendName.setText(getItem(position).getName());

        //Edit Text Listeners:-

        holder.editText.addTextChangedListener(new TextWatcher() {
            @Override
            public void beforeTextChanged(CharSequence s, int start, int count, int after) {
            }
            @Override
            public void onTextChanged(CharSequence s, int start, int before, int count) {

            }
            @Override
            public void afterTextChanged(Editable s) {
                myList.put(position,s.toString().trim());
            }
        });

        holder.editText.setText(myList.get(position));

        return convertView;
    }

    private static class ViewHolder {

        private TextView friendName;
        private EditText editText;

        public ViewHolder(View v) {
            friendName = (TextView) v.findViewById(R.id.name);
            editText = (EditText) v.findViewById(R.id.edit);
        }
    }
}

自定义对象:-

public class Friend {

    private String name,editText;
    private int selection = 0;

    public Friend(String name) {
        this.name = name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getName() {
        return name;
    }

    public void setSelection(int selection) {
        this.selection = selection;
    }

    public int getSelection() {
        return selection;
    }

    public void setEditText(String editText) {
        this.editText = editText;
    }

    public String getEditText() {
        return editText;
    }
}

Answer 1

您需要将数据存储在 afterTextChanged 中，就像您在文本中设置的对象一样

   holder.friendName.setText(myFriends.get(position).getName());

        //Edit Text Listeners:-

        holder.editText.addTextChangedListener(new TextWatcher() {
            @Override
            public void beforeTextChanged(CharSequence s, int start, int count, int after) {
            }
            @Override
            public void onTextChanged(CharSequence s, int start, int before, int count) {

            }
            @Override
            public void afterTextChanged(Editable s) {
                myFriends.get(position).setName(s.toString);
            }
        });