我试图以编程方式创建一个TableLayout。这是行不通的。在一个XML文件相同的布局工作，但。这是我有：

I'm trying to create a TableLayout programatically. It just won't work. The same layout in an xml file works though. This is what I have:

public class MyTable extends TableLayout
{
    public MyTable(Context context) {
        super(context);

        setLayoutParams(new TableLayout.LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.WRAP_CONTENT));
        TableRow row = new TableRow(context);
        row.setLayoutParams(new TableRow.LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.WRAP_CONTENT));

        Button b = new Button(getContext());
        b.setText("hello");
        b.setLayoutParams(new LayoutParams(TableRow.LayoutParams.FILL_PARENT, TableRow.LayoutParams.WRAP_CONTENT));
        row.addView(b); 
        addView(row)
    }
}

...

// In main activity:
MyTable table = new MyTable(this);
mainLayout.addView(table);

当我运行这个，我没有得到一个崩溃，但没有出现。如果我摆脱的TableRow实例，至少按钮不会显示为TableLayout的直接孩子。我究竟做错了什么？

When I run this, I don't get a crash, but nothing appears. If I get rid of the TableRow instance, at least the button does appear as a direct child of the TableLayout. What am I doing wrong?

感谢

推荐答案

只是为了让答案更加清晰：

Just to make the answer more clear:

TableLayout.LayoutParams tableParams = new TableLayout.LayoutParams(TableLayout.LayoutParams.WRAP_CONTENT, TableLayout.LayoutParams.WRAP_CONTENT);
TableRow.LayoutParams rowParams = new TableRow.LayoutParams(TableRow.LayoutParams.WRAP_CONTENT, TableRow.LayoutParams.WRAP_CONTENT);

TableLayout tableLayout = new TableLayout(context);
tableLayout.setLayoutParams(tableParams);

TableRow tableRow = new TableRow(context);
tableRow.setLayoutParams(tableParams);

TextView textView = new TextView(context);
textView.setLayoutParams(rowParams);

tableRow.addView(textView);