Question

它是一个字典搜索，当一个人输入文本时，会弹出建议。该数据库是一本英语词典。

//Search System
        final Context ctx = this;
        autoCompleteTextView.addTextChangedListener(new TextWatcher() {
            @Override
            public void beforeTextChanged(CharSequence charSequence, int i, int i1, int i2) {

            }

            @Override
            public void onTextChanged(CharSequence charSequence, int i, int i1, int i2) {

                if (autoCompleteTextView.getText().length() >= 2) {
                    DbHandler handler = new DbHandler(getApplicationContext());
                    final ArrayList<String> Deflist = handler.getSearchList(autoCompleteTextView.getText().toString().trim());
                    suggestions = Deflist;


                    handler.close();
                    if (Deflist != null) {

                        Search.this.runOnUiThread(new Runnable() {
                            @Override
                            public void run() {

                                ArrayAdapter adapter = new ArrayAdapter(ctx, android.R.layout.simple_list_item_1, Deflist);
                                autoCompleteTextView.setAdapter(adapter);
                                autoCompleteTextView.setThreshold(1);
                            }
                        });
                    }

                }

            }

            @Override
            public void afterTextChanged(Editable editable) {



            }
        });

数据库代码

 public void indexDB()
    {
        try{

            getWritableDatabase().execSQL("CREATE INDEX words_index ON entries(word)");
        }
        catch (Exception ex)
        {
            ex.printStackTrace();
        }
    }




    public ArrayList<String> getSearchList(String partWord) {

        try {
            if (partWord == "") {
                return null;
            }


            ArrayList<Definition> DefList = new ArrayList<>();
            ArrayList<String> test = new ArrayList<>();
            Definition definition = null;
            Cursor cursor = getReadableDatabase().rawQuery("SELECT * FROM " + TABLE_NAME + " WHERE word LIKE '" + partWord + "%'", null);

            try {

                if (cursor.moveToFirst()) {
                    for (cursor.moveToFirst(); !cursor.isAfterLast(); cursor.moveToNext()) {
                        String word = cursor.getString(cursor.getColumnIndex("word"));

                        if (!test.contains(word)) {
                            test.add(word);

                        }


                    }
                }
            } catch (Exception e) {
                cursor.close();
            }

            return test;
        } catch (Exception ex) {
            ex.printStackTrace();
        }

        return null;

}

我试图将其编入索引，将限制设置为2或更多以开始搜索，甚至尝试在单独的线程中运行（删除多线程的想法不一致）。有没有办法让它真的很快？

Answer 1

为了优化对数据库的搜索，我们可以创建一个虚拟全文搜索表，并传递表的数据以搜索到FTS表。

我已经为它实现了一个API。此API还使用预测来获取与搜索查询相关的最接近的单词。

link - https://github.com/gauravat16/Smart-Search

    PredictiveSearch search = new PredictiveSearch(getApplicationContext());
      ArrayList<String> columns = new ArrayList<>();
      columns.add("word");
  try {
          search.createFTS4Table("learn.db", "entries", columns);
          search.ftsRebuilder(); //Use it to rebulid after any change
          ArrayList<String> resp1 = search.getSearchList("2"); //Get result w/o stemming
          ArrayList<String> resp2 = search.getGuessWord("2"); //Get result with stemming - predictive

      } catch (Exception ex) {
          ex.printStackTrace();
      } finally {
          search.close();
      }

如何提高自动完成搜索速度？

1 个答案: