Timmmm Timmmm - 1 month ago 10
Java Question

How can I get an Android TableLayout to fill the screen?

I'm battling with Android's awful layout system. I'm trying to get a table to fill the screen (simple right?) but it's ridiculously hard.

I got it to work somehow in XML like this:

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

<TableLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_height="fill_parent" android:layout_width="fill_parent">
<TableRow android:layout_height="fill_parent" android:layout_width="fill_parent" android:layout_weight="1">
<Button android:text="A" android:layout_width="wrap_content" android:layout_height="fill_parent" android:layout_weight="1"/>
<Button android:text="B" android:layout_width="wrap_content" android:layout_height="fill_parent" android:layout_weight="1"/>
</TableRow>
<TableRow android:layout_height="fill_parent" android:layout_width="fill_parent" android:layout_weight="1">
<Button android:text="C" android:layout_width="wrap_content" android:layout_height="fill_parent" android:layout_weight="1"/>
<Button android:text="D" android:layout_width="wrap_content" android:layout_height="fill_parent" android:layout_weight="1"/>
</TableRow>


However I can not get it to work in Java. I've tried a million combinations of the LayoutParams, but nothing ever works. This is the best result I have which only fills the width of the screen, not the height:

table = new TableLayout(this);
// Java. You suck.
TableLayout.LayoutParams lp = new TableLayout.LayoutParams(
ViewGroup.LayoutParams.FILL_PARENT,
ViewGroup.LayoutParams.FILL_PARENT);
table.setLayoutParams(lp); // This line has no effect! WHYYYY?!
table.setStretchAllColumns(true);
for (int r = 0; r < 2; ++r)
{
TableRow row = new TableRow(this);
for (int c = 0; c < 2; ++c)
{
Button btn = new Button(this);
btn.setText("A");
row.addView(btn);
}
table.addView(row);
}


Obviously the Android documentation is no help. Anyone have any ideas?

Answer

Finally worked out how to do this. Gave up on TableLayout and just used horizontal LinearLayout's inside a vertical one. The critical key is to set the weight. If you specify FILL_PARENT but with the default weight it doesn't work:

    LinearLayout buttonsView = new LinearLayout(this);
    buttonsView.setOrientation(LinearLayout.VERTICAL);
    for (int r = 0; r < 6; ++r)
    {
        LinearLayout row = new LinearLayout(this);
        row.setOrientation(LinearLayout.HORIZONTAL);
        for (int c = 0; c < 4; ++c)
        {
            Button btn = new Button(this);
            btn.setText("A");
            LinearLayout.LayoutParams lp = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.FILL_PARENT, LinearLayout.LayoutParams.FILL_PARENT);
            lp.weight = 1.0f;
            row.addView(btn, lp);
        }
        LinearLayout.LayoutParams lp = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.FILL_PARENT, LinearLayout.LayoutParams.FILL_PARENT);
        lp.weight = 1.0f;
        buttonsView.addView(row, lp);
    }

    ViewGroup.LayoutParams lp = new ViewGroup.LayoutParams(ViewGroup.LayoutParams.FILL_PARENT, ViewGroup.LayoutParams.FILL_PARENT);
    setContentView(buttonsView, lp);
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