Create TableLayout programmatically

Question

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);

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?

ericn · Accepted Answer · 2016-11-09 20:09:29Z

42

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(new LinearLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT, LinearLayout.LayoutParams.WRAP_CONTENT));// assuming the parent view is a LinearLayout

TableRow tableRow = new TableRow(context);
tableRow.setLayoutParams(tableParams);// TableLayout is the parent view

TextView textView = new TextView(context);
textView.setLayoutParams(rowParams);// TableRow is the parent view

tableRow.addView(textView);

Explanation
When you call setLayoutParams, you are supposed to pass the LayoutParams of the parent view

edited Nov 9, 2016 at 20:09

ericn

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answered Dec 21, 2012 at 10:52

Grigori A.

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5 Comments

Leon Over a year ago

Shouldn't it be tableRow.setLayoutParams(rowParams) ?

Muneeb Mirza Over a year ago

The life saver award goes to @Gigori A. and mark. Gigori A. for this answer and mark for his own answer.

The_Martian Over a year ago

Great and helpful solution. As a side note, you should add the row to the table before you add the textview to the row. tableLayout.addView(tableRow);

Starwave Over a year ago

Spent an hour trying to figure out what I was doing wrong - turns out in your code you missed adding tableRow to the tableLayout: tableLayout.addView(tableRow);

albaspazio Over a year ago

@The_Martian. actually, that's not mandatory. it also works first filling the row and then adding the latter to the table. In my strict opinion, that is more intuitive.

mark · Accepted Answer · 2009-10-07 01:28:33Z

6

It turns out I needed to specify TableRowLayout, TableLayout etc for the layout params, otherwise the table just won't show!

answered Oct 7, 2009 at 1:28

mark

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4 Comments

Atma Over a year ago

Can you post your code solution? It looks like you are already doing that above.

Brayden Over a year ago

Thank you! @Atma TableRows should use TableLayout.LayoutParams and views inside the TableRows should use TableRow.LayoutParams. :)

Geert Weening Over a year ago

Horrible that you need to explicitly do this, but it worked for me, thanks!

Anonsage Over a year ago

Thank you @Brayden! That was the small detail I missed in my subclass of TableLayout that automatically had all TableLayout.LayoutParams and not TableRow.LayoutParams!

Korhan Ozturk · Accepted Answer · 2012-06-21 15:51:16Z

1

For me, to get mine I had to call addContentView().

edited Jun 21, 2012 at 15:51

Korhan Ozturk

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answered Apr 14, 2012 at 4:51

John Moses

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Comments

Community · Accepted Answer · 2017-05-23 11:46:48Z

1

A good solution is to inflate layout files for each instance of row you want to create. See this post : How to duplicate Views to populate lists and tables?

edited May 23, 2017 at 11:46

CommunityBot

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answered Jan 11, 2014 at 6:39

clotilde

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Comments

ericn · Accepted Answer · 2016-11-09 06:46:55Z

0

Your problem is at this line:

b.setLayoutParams(new LayoutParams(TableRow.LayoutParams.FILL_PARENT, TableRow.LayoutParams.WRAP_CONTENT));

You need to change LayoutParams to TableRow.LayoutParams:

b.setLayoutParams(new TableRow.LayoutParams(TableRow.LayoutParams.FILL_PARENT, TableRow.LayoutParams.WRAP_CONTENT));

answered Nov 9, 2016 at 6:46

ericn

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