Question

我正在尝试使用notifyDataSetChanged来更新我的列表视图，以便将其中的一行从密码点更改为纯文本并返回密码点。

在我的适配器中（根据此处的注释更改它）我检查该行中对象的类型。如果该行是密码，我将其设置为

setTransformationMethod(new PasswordTransformationMethod());

将密码文本转换为点。稍后在我的活动中点击该行会将其更改为“notPass”，并且我尝试使用notifyDataSetChanged刷新我的列表视图，以将其表示为可见文本。

public class UserAccountAdapter extends ArrayAdapter<UserAccountData> {
    Context context;
    int layoutResourceId;
    UserAccountData data[] = null;
    TreeSet<String> mSeparatorsSet = new TreeSet<String>();

    public UserAccountAdapter(Context context, int layoutResourceId,
            UserAccountData[] data) {
        super(context, layoutResourceId, data);
        this.layoutResourceId = layoutResourceId;
        this.context = context;
        this.data = data;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        View row = convertView;
        UserAccountDataHolder holder = null;

        if (row == null) {
            LayoutInflater inflater = ((Activity) context).getLayoutInflater();
            row = inflater.inflate(layoutResourceId, parent, false);

            holder = new UserAccountDataHolder();
            holder.imgIcon = (ImageView) row.findViewById(R.id.imgUserAccountIcon);
            holder.txtTitle = (TextView) row.findViewById(R.id.txtTitle);


            row.setTag(holder);
        } else {
            holder = (UserAccountDataHolder) row.getTag();
        }

        UserAccountData userAccountData = data[position];
        holder.txtTitle.setText(userAccountData.title); 
        //hold

er.txtTitle.setTransformationMethod(new PasswordTransformationMethod());
            holder.imgIcon.setImageResource(userAccountData.icon);
        if(userAccountData.type.equals("pass")){

            ((TextView) row.findViewById(R.id.txtTitle)).setTransformationMethod(new PasswordTransformationMethod());
        }
        else{
            ((TextView) row.findViewById(R.id.txtTitle)).setTransformationMethod(null);
        }


        return row;
    }

    static class UserAccountDataHolder {
        ImageView imgIcon;
        TextView txtTitle;
    }
    }

我给适配器的对象是：

public class UserAccountData {
    public int icon;
    public String type;
    public String title;
    public UserAccountData(){
        super();
    }

    public UserAccountData(int icon, String title, String type) {
        super();
        this.icon = icon;
        this.title = title;
        this.type = type;
    }
    public void setType(String type){
        this.type = type;
    }

}

我处理clickListener的活动部分是：

 usersArray = new UserAccountData[user_data.size()];
 user_data.toArray(usersArray);

 final UserAccountAdapter adapter = new UserAccountAdapter(this,
                                        R.layout.user_accounts_row, usersArray);

 userAccountsListView = (ListView) findViewById(R.id.userAccounts);
 userAccountsListView.setAdapter(adapter);

 userAccountsListView.setOnItemClickListener(new OnItemClickListener() {
        @Override
            public void onItemClick(AdapterView<?> parent, View view,
                int position, long id) {
            if(adapter.getItem(position).type.equals("pass")){
                adapter.getItem(position).setType("notPass");
                adapter.notifyDataSetChanged();


            }
            else if(adapter.getItem(position).type.equals("notPass")){
                adapter.getItem(position).setType("pass");
                adapter.notifyDataSetChanged();

            }

现在，当我点击带有点的密码字段时，该字段仍然是点状的，而某些但不是所有其他类型为user / email / phone的字段也变成了点

知道我做错了什么吗？

更新：解决了这个问题。 1）如果，而不是if / if，需要一个else。 2）根据其中一条评论

更改了适配器

Answer 1

在getView方法的适配器类中，您不会为类型为“no pass”的字段重置转换。

if(userAccountData.type.equals("notPass")){
        holder.txtTitle.setTransformationMethod(null);
    }

您可以使用'getItemAtPositionMethod'

获取相关数据，而不是直接将位置用作数组索引

listView.setOnItemClickListener(new OnItemClickListener() {
        @Override
        public void onItemClick(AdapterView<?> parent, View view,
                int position, long id) {

        UserAccountData uad = (UserAccountData)parent.getItemAtPosition(position);
            //your code

        });

尝试在每个getView调用中直接设置值：

@Override
public View getView(int position, View convertView, ViewGroup parent) {
    View row = convertView;
    UserAccountDataHolder holder = null;

    if (row == null) {
        LayoutInflater inflater = ((Activity) context).getLayoutInflater();
        row = inflater.inflate(layoutResourceId, parent, false);
    }

    UserAccountData userAccountData = data[position];
    TextView tvTitle = (TextView) row.findViewById(R.id.txtTitle);

    if(userAccountData.type.equals("pass")){
        tvTitle.setTransformationMethod(new PasswordTransformationMethod());
    }

    if(userAccountData.type.equals("notPass")){
        tvTitle .setTransformationMethod(null);
    }
 }

}

notifyDataSetChanged搞砸了我的列表视图

1 个答案: