Question

我想在textwatcher中使用搜索方法我做任何事情芽游标总是向我返回假任何人都可以帮助我！谢谢

它是我的数据库：

public static void searchSelect(CharSequence s) {
    database = SQLiteDatabase.openOrCreateDatabase(destPath + "/database.db", null);
    Cursor cursor = database.rawQuery("SELECT * FROM main WHERE title LIKE ' % " + s + " % ' ", null);
    SearchFragment.search.clear();
    Log.i("LOG", "cursor :" + cursor.moveToNext());
    while (cursor.moveToNext()) {
        int id = cursor.getInt(cursor.getColumnIndex("id"));
        String title = cursor.getString(cursor.getColumnIndex("title"));
        String content = cursor.getString(cursor.getColumnIndex("content"));
        String address = cursor.getString(cursor.getColumnIndex("address"));
        String imgAddress = cursor.getString(cursor.getColumnIndex("img_adrs"));
        String city = cursor.getString(cursor.getColumnIndex("city"));
        String category = cursor.getString(cursor.getColumnIndex("category"));
        int cityId = cursor.getInt(cursor.getColumnIndex("city_id"));
        int catId = cursor.getInt(cursor.getColumnIndex("cat_id"));
        int inside = cursor.getInt(cursor.getColumnIndex("inside_id"));

        Structure struct = new Structure(id, title, content, address, imgAddress, city, category, cityId, catId, inside);
        struct.setId(id);
        struct.setTitle(title);
        struct.setContent(content);
        struct.setAddress(address);
        struct.setImgAddress(imgAddress);
        struct.setCity(city);
        struct.setCategory(category);
        struct.setCity_id(cityId);
        struct.setCat_id(catId);
        struct.setInside(inside);
        SearchFragment.search.add(struct);
    }
    cursor.close();
}

及其片段中的我的文本监视程序

private void TextWatcher() {
    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) {
            Log.i("LOG", "text: " + s);
            searchSelect(s.toString());
            adapterSearch.notifyDataSetChanged();
        }

        @Override
        public void afterTextChanged(Editable s) {

        }
    });
}

Answer 1

您正在做2 cursor.moveToNext()，结果未知。实例化光标后，放下Log语句并执行：

if (cursor != null) {
    if (cursor.moveToFirst()) {
       do {
          // your code here

       } while (cursor.moveToNext())   
    }
}

我如何使用TextWatcher在Android Studio数据库中进行搜索

1 个答案: