Question

I’m having difficult with this bit of code:

public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);

    RelativeLayout layout = (RelativeLayout)findViewById(R.id.RelativeLayout1);
    RelativeLayout.LayoutParams params = new RelativeLayout.LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT);

I have my RelativeLayout1 in xml like this:

<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/ScrollView"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >

<RelativeLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/RelativeLayout1"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical"
    android:paddingLeft="60dp"
    android:paddingTop="53dp" >

But when I apply the scrollview, the fill_parent for RelativeLayout1 does not work as it should when it is not a child of scrollview. When it is not a child (i.e. I remove scrollview completely) then the relative layout covers the whole screen as I like it to. But when I put it inside scrollview, it only reaches the last element (a button) inside the relativelayout even though I use fill_parent.

So I am trying it programmatically to see if it makes a difference, but I can’t seem to figure out how to apply my params variable to my layout one in the first bit of code. If you have any other ideas, do let me know as well.

Answer 1

You have forgotten to call the setter method layout.setLayoutParams(params).
To apply your created parameters you have to give them to the actual layout.

Be cautious with using fill_parent when the parent is a ScrollView. As the Scroll view adapts its size to its children.