Question

我在本周早些时候选择了Java，目前我正处于创建应用程序的最后一步。我试图在以编程方式创建的表中打印数据。问题是，我似乎无法弄清楚如何将scrollview添加到此表。该表继续用于繁忙的行，所以我需要scrollview才能正确查看它。我尝试的一切都崩溃了我的应用程序。以下是我的创建表函数。

private void createTable ()
 { 
   DecimalFormat format = new DecimalFormat ("##.00");

   LinearLayout.LayoutParams linearContainerParams = 
    new LinearLayout.LayoutParams ( 
    ViewGroup.LayoutParams.MATCH_PARENT, 
    ViewGroup.LayoutParams.WRAP_CONTENT, 
    0.0f); 

    LinearLayout.LayoutParams linearWidgetParams = new LinearLayout.LayoutParams (
        ViewGroup.LayoutParams.MATCH_PARENT, 
        ViewGroup.LayoutParams.MATCH_PARENT, 
        1.0f); 

        TableLayout.LayoutParams tableContainerParams = 
        new TableLayout.LayoutParams ( 
        ViewGroup.LayoutParams.MATCH_PARENT, 
        ViewGroup.LayoutParams.WRAP_CONTENT, 
        0.0f); 

        TableLayout.LayoutParams tableWidgetParams = 
        new TableLayout.LayoutParams ( 
        ViewGroup.LayoutParams.MATCH_PARENT, 
        ViewGroup.LayoutParams.MATCH_PARENT, 
        1.0f); 

        TableRow.LayoutParams rowContainerParams = 
        new TableRow.LayoutParams ( 
        ViewGroup.LayoutParams.MATCH_PARENT, 
        ViewGroup.LayoutParams.WRAP_CONTENT, 
        0.0f); 

        TableRow.LayoutParams rowWidgetParams = 
        new TableRow.LayoutParams ( 
        ViewGroup.LayoutParams.MATCH_PARENT, 
        ViewGroup.LayoutParams.MATCH_PARENT, 
        1.0f); 

        mRoot = new LinearLayout (this); 
        mRoot.setOrientation (LinearLayout.VERTICAL); 
        mRoot.setBackgroundColor (Color.LTGRAY); 
        mRoot.setLayoutParams (linearContainerParams); 

        mTableLayout = new TableLayout (this); 
        mTableLayout.setOrientation (TableLayout.VERTICAL); 
        mTableLayout.setBackgroundColor (Color.BLUE); 
        mTableLayout.setLayoutParams (tableContainerParams); 
        mRoot.addView (mTableLayout); 

        mTableRow = new TableRow (this); 
        mTableRow.setOrientation (TableLayout.VERTICAL); 
        mTableRow.setBackgroundColor (Color.CYAN); 
        mTableRow.setLayoutParams (rowContainerParams); 
        mTableLayout.addView (mTableRow); 

        mTextView = new TextView (this); 
        mTextView.setText ("Total"); 
        mTextView.setTextColor (Color.RED); 
        mTextView.setGravity (Gravity.RIGHT); 
        mTextView.setLayoutParams (rowWidgetParams); 
        mTableRow.addView (mTextView); 

        mTextView = new TextView (this); 
        mTextView.setText ("Month");

        mTextView.setTextColor (Color.RED); 
        mTextView.setGravity (Gravity.RIGHT); 
        mTextView.setLayoutParams (rowWidgetParams); 
        mTableRow.addView (mTextView); 

        int i = 0;

        for (i = 0; i < mTotalPaymentCount; ++i)
        {
          TextView text = new TextView (this);
          text.setText ("" + (i + 1));
          row.addView (text);

          text.setTextColor (Color.RED); 
          text.setGravity (Gravity.RIGHT); 
          text.setLayoutParams (rowWidgetParams);

          mTableLayout.addView (row);
        }


        setContentView (mRoot);
}

我有没有办法让scrollview工作？谢谢你的帮助。

Answer 1

我认为@ FD_的答案是正确的，但是，如果您仍然希望按照提议的方式进行，那么正确的方法是创建一个ScrollView对象，然后通过添加TableLayout它的addView()方法。

ScrollView sv = new ScrollView(this);
sv.addView(yourTableLayout);

Answer 2

您应该查看ListView小部件。 ListViews的设计效率更高，即使有数百行，也可以流畅地存储和工作。只有在需要时，ListView才会实例化它们的单元格，而同时实例化数百个视图。此外，ListViews已经内置了整个滚动功能。

以下是帮助您入门的教程：http://www.vogella.com/tutorials/AndroidListView/article.html

ScrollView以编程方式

2 个答案: