Question

我有CursorAdapter来显示数据库中的数据。现在，我想在自定义列表视图中添加搜索功能。所以，我尝试了这个。但是，这不起作用。

 searchOption.addTextChangedListener(new TextWatcher() {

            @Override
            public void onTextChanged(CharSequence cs, int start, int before, int count) {
                // TODO Auto-generated method stub

                AbstractActivity.this.cursorAdapter.getFilter().filter(cs);
            }

            @Override
            public void beforeTextChanged(CharSequence s, int start, int count, int after) {
                // TODO Auto-generated method stub

            }

            @Override
            public void afterTextChanged(Editable s) {
                // TODO Auto-generated method stub

            }
        });

这是适配器代码

public class AbstractCursorAdapter extends CursorAdapter {
    Cursor cursorOne;

    String getName;

    @SuppressWarnings("deprecation")
    public AbstractCursorAdapter(Context context, Cursor c) {
        super(context, c);
        // TODO Auto-generated constructor stub
    }

    @Override
    public void bindView(View view, Context context, Cursor cursor) {
        // TODO Auto-generated method stub
        TextView title = (TextView)view.findViewById(R.id.abTitle);

        title.setText(cursor.getString(cursor.getColumnIndexOrThrow("TITLE")));
        ;

        TextView topic = (TextView)view.findViewById(R.id.abTopic);

        topic.setText(cursor.getString(cursor.getColumnIndexOrThrow("TOPIC")));

        TextView type = (TextView)view.findViewById(R.id.abType);

        type.setText(cursor.getString(cursor.getColumnIndexOrThrow("TYPE")));

        String value = cursor.getString(cursor.getColumnIndexOrThrow("_id"));

        String sqlQuery = "select abstracts_item._id AS ID,abstract_author.NAME AS NAME from abstracts_item,abstract_author,authors_abstract where abstracts_item._id = authors_abstract.abstractsitem_id and abstract_author._id = authors_abstract.abstractauthor_id and ID = "
                + value;


        cursorOne = DatabaseHelper.database.rawQuery(sqlQuery, null);

        if (cursorOne != null) {
            cursorOne.moveToFirst();
            do {

                if (cursorOne.getPosition() == 0) {

                    getName = cursorOne.getString(cursorOne.getColumnIndexOrThrow("NAME"));

                } else {

                    getName = getName + ","
                            + cursorOne.getString(cursorOne.getColumnIndexOrThrow("NAME"));

                }

            } while (cursorOne.moveToNext());
        }

        TextView authorNames = (TextView)view.findViewById(R.id.SubTitle);

        String formatterNames = "";

        String[] namesArray = getName.split(",");

       // Log.e("Length", String.valueOf(namesArray.length));

        if (namesArray.length > 1) {
            for (int i = 0; i < namesArray.length; i++) {

                if (i == namesArray.length - 1) {
                    formatterNames = formatterNames + " & " + namesArray[i];
                }else if (i == 0){
                    formatterNames = formatterNames +namesArray[i];
                }
                else {
                    formatterNames = formatterNames + " , " +namesArray[i];
                }
            }


            /*
             * Get Width
             */

            WindowManager WinMgr = (WindowManager)context.getSystemService(Context.WINDOW_SERVICE);
            int displayWidth = WinMgr.getDefaultDisplay().getWidth();

            Paint paint = new Paint();
            Rect bounds = new Rect();

            int text_height = 0;
            int text_width = 0;

            //paint.setTypeface(Typeface.DEFAULT);

            paint.getTextBounds(formatterNames, 0, formatterNames.length(), bounds);

            text_height =  bounds.height();
            text_width =  bounds.width();


            Log.e("SIZE", "Text =" + String.valueOf(text_width) + "------" +"Layout = " + String.valueOf(displayWidth));

            if(text_width > displayWidth){

                String output= formatterNames.split(",")[0] + " et al. " ;
                authorNames.setText(output);

             }else{
                 authorNames.setText(formatterNames.replaceAll("((?:^|[^A-Z.])[A-Z])[a-z]*\\s(?=[A-Z])",
                         "$1.")); 
             }


        } else {

            authorNames
            .setText(getName.replaceAll("((?:^|[^A-Z.])[A-Z])[a-z]*\\s(?=[A-Z])", "$1."));
        }
    }

    @Override
    public View newView(Context context, Cursor cursor, ViewGroup viewgroup) {
        // TODO Auto-generated method stub
        LayoutInflater inflater = LayoutInflater.from(viewgroup.getContext());
        View returnView = inflater.inflate(R.layout.abstract_content, viewgroup, false);
        return returnView;
    }



}

如果您帮助我们找到代码中的问题或者如何将搜索功能添加到自定义列表视图中，我将很高兴。

Answer 1

尝试使用它

adapter.setFilterQueryProvider(new FilterQueryProvider() {
    public Cursor runQuery(CharSequence constraint) {
       // fetch all query data by input String
       // fetchDataByName take input String when search
       return dbHelper.fetchDataByName(constraint.toString());
    }
});

public void onTextChanged(CharSequence s, int start, int before,
            int count) {
     AbstractActivity.this.cursorAdapter.getFilter().filter(cs);       
}

Answer 2

在beforeTextChanged（）方法中创建一个新的cursorAdapter适配器对象。

 new SimpleCursorAdapter (this, Android.Resource.Layout.SimpleListItem1, cursor,
       fromColumns,
       toControlIDs);

Android自定义ListView中的搜索功能

2 个答案: