Why do the views in my TableRow don't react to their weights?

I'm programming an Android app and I'm trying to show a table. My problem is, that the columns don't fill the screen, they just all stick to left.

I already tried using padding, but first I don't think that it's compatible with all display resolutions and second the columns were aligned differently when they had different content in them.

Then I read about weight and this was exactly what I wanted, giving every column a specific percentage of the width of the screen. But weights did lead to the cells sticking to the left again. They did react in no way to the weights I've set.

I program the view in xml templates and inflate them programmatically using the LayoutInflater. Then I add them to the corresponding TableRow. All that works perfectly fine, but they just don't react to the weights.

I would really appreciate your help.

EDIT: The templates refer to a style and look like this:

<?xml version="1.0" encoding="UTF-8"?>

<TextView xmlns:android="http://schemas.android.com/apk/res/android"

style="@style/scheduleClass" />

And the style looks like this:

<?xml version="1.0" encoding="utf-8"?>

<resources>

    <style name="scheduleItem" parent="@android:style/TextAppearance.Medium">

        <item name="android:layout_width">0dp</item>

        <item name="android:layout_height">wrap_content</item>

        <item name="android:paddingRight">0dp</item>

        <item name="android:paddingBottom">10dp</item>

    </style>

    <style name="scheduleClass" parent="scheduleItem">

        <item name="android:layout_weight">0.2</item>

    </style>

</resources>

There are other a few other columns, but they just have another name and another weight.

And this is how I add the views to the table:

public void updateList(ArrayList<Lesson> lessons) {

    setContentView(R.layout.schedule);

    TableLayout table = (TableLayout) findViewById(R.id.table);



    for(Lesson cancel : lessons) {

        TableRow row = new TableRow(this);



        TextView date = (TextView) this.getLayoutInflater().inflate(R.layout.scheduledatetemplate, null);

        date.setText(cancel.date);



        TextView classname = (TextView) this.getLayoutInflater().inflate(R.layout.scheduleclasstemplate, null);

        classname.setText(cancel.classname);



        TextView lesson = (TextView) this.getLayoutInflater().inflate(R.layout.schedulelessontemplate, null);

        lesson.setText(cancel.lesson);



        Button details = (Button) this.getLayoutInflater().inflate(R.layout.detailsbuttontemplate, null);

        details.setText(R.string.details);

        details.setOnClickListener(this);



        row.addView(date);

        row.addView(classname);

        row.addView(lesson);

        row.addView(details);



        table.addView(row);

    }

}

And this is the TableLayout xml:

<?xml version="1.0" encoding="utf-8"?>



<ScrollView  xmlns:android="http://schemas.android.com/apk/res/android"

    android:scrollbars="vertical"

    android:layout_height="fill_parent"

    android:layout_width="fill_parent">



    <TableLayout xmlns:android="http://schemas.android.com/apk/res/android"

        android:id="@+id/table"

        android:layout_width="fill_parent"

        android:layout_height="wrap_content"

        android:scrollbars="vertical">



    </TableLayout>

</ScrollView>