Question

I have lists of LinearLayouts with horizontal orientation each one containing two textviews added dynamically.
This LinearLayout is finally wrapped into master LinearLayout.

I want the second textview of each linear layout to be right aligned progrmatically. How can I do this dynamically.

Here’s sample code:

LinearLayout placeHolderLinearLayout =  (LinearLayout)findViewById(R.id.listhosts);

//Several such layouts with 2 text views will be added to placeholder
LinearLayout l = new LinearLayout(this);
l.setClickable(true);

TextView h = new TextView(this);
h.setText("left");
h.setSingleLine(true);


TextView t = new TextView(this);
t.setText("right");
t.setSingleLine(true);

l.addview(h);
l.addview(t);

placeHolderLinearLayout.addView(l);

There is android:layout_alignParentRight attribute. But how to set this dynamically in this case. Any clue?

Answer 1

The android:layout_alignParentRight can only be applied to a view if its parent is a RelativeLayout. Change your container to that, and the 2 sub-views can use any of the layout_alignParent* attributes.

If you can’t do this programatically (which I can’t see how to do quickly), then you could always define your inner layout in xml (where you can easily get the layout correct) and inflate manually via:

LayoutInflater vi = (LayoutInflater) getApplicationContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View l = vi.inflate(R.layout.inner_relative_layout, null);

TextView leftTextView = (TextView) l.findViewById(R.id.left_text);
leftTextView.setText("left");
// ... fill in right text too

placeHolderLinearLayout.addView(l);

Edit: added layout definition

Use a layout like this, and inflate it in the code as above:

<RelativeLayout android:id="@+id/inner_relative_layout" android:layout_width="fill_parent" android:layout_height="wrap_content">
    <TextView android:id="@+id/left_text" android_alignParentLeft="true" android:layout_width="wrap_content" android:layout_height="wrap_content" />
    <TextView android:id="@+id/right_text" android_alignParentRight="true" android:layout_width="wrap_content" android:layout_height="wrap_content" />
</RelativeLayout>

You will be creating multiple of these layouts for each item you’re adding to your list.