android - 如何直接使用适配器从 AutoCompleteTextView 中删除数据

Question

我有 AutoCompleteTextView 用于从数据库中搜索值。单击过滤值时，它会设置为 AutoCompleteTextView，可用于更新特定数据的值。

我想在过滤项目旁边加入删除 ImageView 功能。单击它时，警告对话框是否删除。能够开发场景。

MyCursorAdapter adapter = new MyCursorAdapter(this, R.layout.edt_delete_item, null, fromName, to);
searchText.setAdapter(adapter);


adapter.setCursorToStringConverter(new CursorToStringConverter() {
            @Override
            public String convertToString(android.database.Cursor cursor) {
                // Get the label for this row out of the "state" column
                //final int columnIndex = cursor.getColumnIndexOrThrow("state");
                int index = cursor.getColumnIndex(DBConstant.Patient_Name_Columns.COLUMN_NAME);
                String strName = "";
                if(index != -1)
                {
                    strName = cursor.getString(index);
                }
                return strName;
            }
        });

QueryFilter 已在自定义适配器上使用:-

adapter.setFilterQueryProvider(new FilterQueryProvider() {
public Cursor runQuery(CharSequence constraint) {
    Cursor cursor = getContentResolver().query(DBConstant.Patient_Name_Columns.CONTENT_URI, null,DBConstant.Patient_Name_Columns.COLUMN_NAME_SEARCHALGO + " like '%" + SearchAlgo.getNameSearchAlgo(constraint.toString())+"%'", null, "0");
                return cursor;
            }
        });

自定义适配器:-

public class MyCursorAdapter extends SimpleCursorAdapter{
  public MyCursorAdapter(Context context, int layout, Cursor c,
        String[] from, int[] to) {
    super(context, layout, c, from, to);
}  

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

    //get reference to the row
    View view = super.getView(position, convertView, parent);
    //check for odd or even to set alternate colors to the row background
    if(position % 2 == 0){  
        view.setBackgroundColor(Color.rgb(238, 233, 233));
    }
    else {
        view.setBackgroundColor(Color.rgb(255, 255, 255));
    }
    return view;  
    }  
 }

AutoCompleteTextView 的适配器在 edt_delete_item 中具有如下布局，具有带删除选项的 ImageView。

单击适配器时，它会在 AutoCompleteTextView -> SearchText 中设置。

我已经处理了 ImageView 的 onClick 监听器。

获取适配器中数据的 id 很困难。

我可以用那个 ImageView 删除适配器的数据吗？

根据建议如何在 ImageView 的标签中设置 Cursor ID？由于游标在将其传递给 MyCustomAdapter

时抛出 CursorIndexOutOfBoundException

Answer 1

根据 Luksprog 的建议 setTag和 getTag是实现我想要的目标的方法。在 getView() within <kbd>ImageView</kbd> 中设置标记在点击事件中获取标签返回是执行操作的正确选择。

已更改 getView()扩展 SimpleCursorAdapter 的 CustomAdapter .

代码 fragment :-

public View getView(int position, View convertView, ViewGroup parent) { 
    // get reference to the row
    View view = super.getView(position, convertView, parent);
    // check for odd or even to set alternate colors to the row background
    LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    view = inflater.inflate(R.layout.edt_delete_item, null);

    getCursor().moveToPosition(position); 

    long id = getCursor().getLong(getCursor().getColumnIndex(DBConstant.Patient_Name_Columns.COLUMN_ID));

    TextView name = (TextView)view.findViewById(R.id.txtText);
    ImageView delete = (ImageView) view.findViewById(R.id.deleteIcon);

    String strName = getCursor().getString(getCursor().getColumnIndex(DBConstant.Patient_Name_Columns.COLUMN_NAME));

    name.setText(strName);

    delete.setTag(String.valueOf(id));
    return view; 
    }

ImageView 的 OnClickListener 处理了删除选项:-

  boolean d = false;
  String _id = v.getTag(); //v is the view in here i.e ImageView in my case.
  d= SmartConsultant.getApplication().getContentResolver().delete(DBConstant.Patient_Name_Columns.CONTENT_URI, "_id=?", new String[] { _id }) > 0;
  if(d)
    {
      //Show Toast Successfully deleted.
     }