SQLite 片段函数实现不会在 TextView 中将文本格式化为 HTML

Posted 2023-03-23

【中文标题】SQLite 片段函数实现不会在 TextView 中将文本格式化为 HTML

【英文标题】：SQLite snippet function implementation does not format Text as HTML in TextView

【发布时间】：2014-10-25 17:31:30

【问题描述】：

我正在使用 SQLite FULL TEXT SEARCH 实现搜索功能。我想像 Google 搜索一样用粗体查询文本呈现结果！我已经实现了类似下面的代码，但它显示没有任何 html 格式的纯文本，尽管将视图绑定到光标适配器并设置 TextView 的文本格式。我无法弄清楚我在代码中哪里错了？请帮忙！

我在 DatabaseAdapter 类中的搜索功能是：

public Cursor searchText(String inputText) throws SQLException 

    Log.w(TAG, inputText);
    String query = "SELECT "+
    "docid as _id," + 
    KEY_NAME + "," +
    KEY_INDEX + "," +
    KEY_TEXT_en + "," +
    KEY_TEXT_ur +  "," +
    KEY_TRANS_ur +  "," +
    "hex(matchinfo("+FTS_VIRTUAL_TABLE+")) AS "+KEY_OCCURRENCES+"," +
    "snippet("+FTS_VIRTUAL_TABLE+",'<b>','</b>')" +
    " from " + FTS_VIRTUAL_TABLE +
    " where ("+  FTS_VIRTUAL_TABLE +") MATCH '" + "\""+"*"+inputText+"\"*"+" ';";

    Log.w(TAG, query);
    Cursor mCursor = mDb.rawQuery(query,null);

    if (mCursor != null) 
    

        mCursor.moveToFirst();
    
    return mCursor;

而我在 Activity 类中向用户显示结果的 show Results 函数是：

public void showResults(String query) 


    Cursor cursor = mDbHelper.searchText((query != null ? query.toString() : "@@@@"));

    if (cursor == null)
    
    
    else 
    
        // Specify the columns we want to display in the result
        String[] from = new String[] 
                
                    DbAdapter.KEY_TEXT_en,
                    DbAdapter.KEY_INDEX,
                    DbAdapter.KEY_NAME,
                ;   
        // Specify the Corresponding layout elements where we want the columns to go
        int[] to = new int[] 
                
                    R.id.TextEnTv,
                    R.id.IndexTv,
                    R.id.NameTv
                ;
 final SimpleCursorAdapter cursorAdapter = new simpleCursorAdapter(this,R.layout.search_results, cursor, from, to);
        cursorAdapter.setViewBinder(new SimpleCursorAdapter.ViewBinder() 
            public boolean setViewValue(View view,Cursor cursor, int columnIndex) 
                   if (columnIndex == cursor.getColumnIndex(DbAdapter.KEY_TEXT_en)) 

                        TextView myView = (TextView) findViewById(R.id.TextEnTv);
                        myView.setText(Html.fromHtml(cursor.getString(cursor.getColumnIndex(DbAdapter.KEY_TEXT_en))));

                        return(true);
                      

                      return(false);
                    
                  );
        mListView.setAdapter(cursorAdapter);

【参考方案1】：

文本视图显示无格式文本，因为代码告诉它显示 KEY_TEXT_en 列的内容，即无格式文本。

要显示sn-p函数的结果，给它一个名字：

SELECT ... snippet(...) AS snippet ...

并将该列用于文本视图。