Android：预加载数据库到表布局视图

Question

我一直在试图弄清楚如何从资产文件夹中的预填充数据库中提取信息以在表格布局视图中显示。如果您知道任何清晰的教程或者您知道如何操作，请帮助我。

我的意思的示例：

数据库示例：

            Mountains      Valleys    Rivers      Oceans

Vermount yes no yes no

kentucky no yes yes no

南达科他州 yes no no no

（在应用程序中，如果我要显示特定行，则表格布局应如下所示

）

           South Dakota         <--(I know how to put the header)

      Mountains       yes
      Valleys          no
      Rivers           no
      Oceans           no

Answer 1

我必须做类似的事情，但不需要光标。这是我最终为我的项目所做的事情。它会出现一个显示无限进度微调器的对话框。

private class AsyncPop extends AsyncTask<Dialog, Integer, ScrollView>
{
    @Override
    protected void onPostExecute( ScrollView result )
    {
        setContentView( result );
        super.onPostExecute( result );
    }

    @Override
    protected ScrollView doInBackground( Dialog... params )
    {
        Dialog d = params[0];

        Connection con = StaticDBHelper.getCon( TabActivityDetail.this.getParent() );
        Statement st = null;

        List<Timestamp> date = new ArrayList<Timestamp>();
        List<String> text = new ArrayList<String>();
        try
        {
            st = con.createStatement();
            String sql = "select activityDateTime, detailText from xfu_ActivityDetail order by activityDateTime desc";
            st.execute( sql );
            ResultSet rs = st.getResultSet();

            while( rs.next() )
            {
                date.add( rs.getTimestamp( "activityDateTime" ) );
                text.add( rs.getString( "detailText" ) );
            }
            rs.close();

        }
        catch( SQLException e )
        {
            //Can't do a whole lot about it right now, should log
        }
        finally
        {
            if( null != st )
            {
                try
                {
                    st.close();
                }
                catch( SQLException e )
                {
                    //Just ignore it, should log
                }
            }
        }
        //Formatting
        ViewGroup.LayoutParams textBoxp1 = new ViewGroup.LayoutParams( 130, ViewGroup.LayoutParams.WRAP_CONTENT );
        ViewGroup.LayoutParams textBoxp2 = new ViewGroup.LayoutParams( ViewGroup.LayoutParams.FILL_PARENT,
                ViewGroup.LayoutParams.WRAP_CONTENT );
        TableRow.LayoutParams rowp1 = new TableRow.LayoutParams( 130, TableRow.LayoutParams.WRAP_CONTENT );
        TableRow.LayoutParams rowp2 = new TableRow.LayoutParams( TableRow.LayoutParams.FILL_PARENT,
                TableRow.LayoutParams.WRAP_CONTENT );
        TableLayout.LayoutParams table1 = new TableLayout.LayoutParams( TableLayout.LayoutParams.FILL_PARENT,
                TableLayout.LayoutParams.FILL_PARENT );

        TableLayout tableView = new TableLayout( _context );
        tableView.setLayoutParams( table1 );
        if( date.size() == 0 )
        {
            TextView dateView = new TextView( _context );
            dateView.setText( "No activity details availible for given filter" );
            dateView.setTypeface( Typeface.DEFAULT, Typeface.BOLD );

            TableRow row = new TableRow( _context );
            row.setLayoutParams( new LayoutParams( LayoutParams.FILL_PARENT, LayoutParams.WRAP_CONTENT ) );
            row.addView( dateView );
            tableView.addView( row, new TableLayout.LayoutParams( LayoutParams.FILL_PARENT,
                    LayoutParams.WRAP_CONTENT ) );
        }
        else
        {
            for( int index = -1; index < date.size(); index++ )
            {
                TableRow row = new TableRow( _context );
                TextView dateView = new TextView( _context );
                TextView textView = new TextView( _context );

                if( index == -1 )
                {
                    dateView.setText( "Date / Time" );
                    textView.setText( "Detail Text" );
                    dateView.setTypeface( Typeface.DEFAULT, Typeface.BOLD );
                    textView.setTypeface( Typeface.DEFAULT, Typeface.BOLD );
                }
                else
                {
                    dateView.setText( LoaderV5._fm.format( date.get( index ) ) );
                    textView.setText( text.get( index ) );
                }
                dateView.setLayoutParams( textBoxp1 );
                textView.setLayoutParams( textBoxp2 );

                row.setLayoutParams( rowp2 );
                row.addView( dateView, rowp1 );
                row.addView( textView, rowp2 );
                tableView.addView( row, table1 );
            }
        }
        //tableView.setColumnShrinkable( 1, true );

        HorizontalScrollView otherscroller = new HorizontalScrollView( _context );
        otherscroller.addView( tableView );

        ScrollView scroller = new ScrollView( _context );
        scroller.addView( otherscroller );
        scroller.setHorizontalScrollBarEnabled( true );

        d.dismiss();
        return scroller;
    }
}

Answer 2

为什么要把它添加到TableLayout中呢？

Just fetch data from SQLite database and using custom adapter use ListView.

因此使用多列ListView设置列类型中的所有值，

请查看Android 中的多列 ListView

Android – 多列 ListView

Answer 3

我相信您需要将数据库文件从资产文件夹复制到其他地方才能使用它

这个问题有相关内容
Android：访问具有 .sqlite 扩展名的资产文件夹 sqlite 数据库文件