Question

我试图以Android应用程序中的表格形式显示来自MySQL数据库的数据。到目前为止，我已使用以下代码将表中的所有数据读入数组：

 Class.forName("com.mysql.jdbc.Driver");

Connection con =     
DriverManager.getConnection("jdbc:mysql://localhost:3306/database","localhost","root");
PreparedStatement stmt = con.prepareStatement("select * from stock");
ResultSet result = stmt.executeQuery("select * from stock");

ArrayList<Integer> stockNo = new ArrayList<Integer>();
ArrayList<String> stockName = new ArrayList<String>();
ArrayList<Integer> stockQuantity = new ArrayList<Integer>();
ArrayList<String> stockUnit = new ArrayList<String>();
ArrayList<Integer> stockThreshold = new ArrayList<Integer>();

while(result.next()){   
stockNo.add(result.getInt(1));
stockName.add(result.getString(2));
stockQuantity.add(result.getInt(3));
stockUnit.add(result.getString(4));
stockThreshold.add(result.getInt(5));
}
}

我的问题是我现在如何将数组中的数据放入我的表格布局视图？

将所有文本存储为@string资源是一种很好的做法，那么有没有办法处理我的数组值？

Answer 1

可以通过以下方式完成：

DriverManager.getConnection("jdbc:mysql://localhost:3306/database","localhost","root");
PreparedStatement stmt = con.prepareStatement("select * from stock");
ResultSet result = stmt.executeQuery("select * from stock");
TableLayout tableLayout = new TableLayout(this);
while(result.next()){
    TableRow tableRow = new TableRow(this);
    TextView stockNo = new TextView(this);
    TextView stockName = new TextView(this);
    TextView stockQuantity = new TextView(this);
    TextView stockUnit = new TextView(this);
    TextView stockThreshold = new TextView(this);
    stockNo.setText(String.valueOf(result.getInt(1)));
    stockName.setText(String.valueOf(result.getInt(2)));
    stockQuantity.setText(String.valueOf(result.getInt(3)));
    stockUnit.setText(String.valueOf(result.getInt(4)));
    stockThreshold.setText(String.valueOf(result.getInt(5)));
    tableRow.addView(stockNo);
    tableRow.addView(stockName);
    tableRow.addView(stockQuantity);
    tableRow.addView(stockUnit);
    tableRow.addView(stockThreshold);
    tableLayout.addView(tableRow);
}

Answer 2

您可以将这五个属性封装在一个新的类中，而不是五个ArrayList吗？

public class Stock{
        public int number;
        public String name;
        public int quantity;
        public String unit;
        public int stockThreshold;
}

并替换你的while循环：

ArrayList<Stock> stockList = new ArrayList<MainActivity.Stock>();
while(result.next()){
    Stock stock = new Stock();
    stock.number = result.getInt(1);
    stock.name = result.getString(2);
    stock.quantity = result.getInt(3);
    stock.unity = result.getString(4);
    stock.stockThreshold = result.getInt(5);
    stockList.add(stock);
    }

为什么使用TableLayout？您应该小心内存消耗并避免创建不必要的多个视图。我建议实现自定义适配器和Gridlayout，请看一下本教程（GridView Custom Adapter示例）：

http://www.mkyong.com/android/android-gridview-example/

将数组中的数据放入Android视图中

2 个答案: