Question

我有以下LinearLayout，我想在其中插入一些动态生成的TableLayout。这样运行没有任何错误，但屏幕上没有任何内容。为什么不出现TableLayout？如何生成TableLayout并将其添加到LinearLayout？

<LinearLayout
    android:id="@+id/linearLayout2"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignParentLeft="true"
    android:layout_alignParentRight="true"
    android:layout_below="@+id/lblOverviewText">  
</LinearLayout>

这就是我生成TableLayout s的方式：

var linearLayout = FindViewById<LinearLayout>(Resource.Id.linearLayout2);
foreach (var block in status.blocks)
{

    var tableParams = new TableLayout.LayoutParams(TableLayout.LayoutParams.FillParent, TableLayout.LayoutParams.FillParent);
    var rowParams = new TableLayout.LayoutParams(TableRow.LayoutParams.FillParent, TableRow.LayoutParams.WrapContent);

    var tableLayout = new TableLayout(this);
    tableLayout.LayoutParameters = tableParams;


    TableRow tableRow = new TableRow(this);
    tableRow.LayoutParameters =tableParams;

    TextView textView = new TextView(this);
    textView.Text = block.Name;
    textView.LayoutParameters = rowParams;

    tableRow.AddView(textView);

    tableLayout.AddView(tableRow, rowParams);
    linearLayout.AddView(tableLayout);
}

Answer 1

首先，我将删除xml中为linearlayout的alignParentLeft / alignParentRight，并简单地放入android：layout_width =“match_parent”。您还需要将xml中linearlayout的'orientation'属性定义为'vertical'。

问题的下一部分是不同类型的布局参数的复杂混合，你已经正确地确定了表和行布局参数seperatley的需要但是已经将rowParams变量定义为'new TableLayout.LayoutParams'而不是它应该是'new TableRow.LayoutParams'，但两者的宽度应为match_parent，高度应为wrap_content。代码示例如下：

  LinearLayout linearLayout = (LinearLayout)findViewById(R.id.linearLayout2);
    for(int i = 0; i < listItems.length; i++)
    {
        TableRow.LayoutParams lp = new TableRow.LayoutParams(TableRow.LayoutParams.MATCH_PARENT, TableRow.LayoutParams.WRAP_CONTENT);
        TableLayout.LayoutParams lp2 = new TableLayout.LayoutParams(TableLayout.LayoutParams.MATCH_PARENT, TableLayout.LayoutParams.WRAP_CONTENT);

        TableLayout tableLayout = new TableLayout(this);
        tableLayout.setLayoutParams(lp2);
        tableLayout.setColumnStretchable(0, true);//NOTE: you may not want this if you do not want your textview to always fill the available space

        TableRow tableRow = new TableRow(this);
        tableRow.setLayoutParams(lp);

        TextView textView = new TextView(this);
        textView.setText(listItems[i]);
        textView.setLayoutParams(lp);
        tableRow.addView(textView);

        tableLayout.addView(tableRow);
        linearLayout.addView(tableLayout);
    }

希望这有帮助。

如何动态生成TableLayouts并将其添加到现有的LinearLayout？

1 个答案: