Dynamically adding content to RelativeLayout

Question

Since I'm still just learning Android (and it appears Amazon says it'll be 2 months till I get the Hello, Android book) I'm still playing around with doing simple things. I have no problem getting an icon to display with the click of a button on my RelativeLayout using ImageView. The code for creating it is as follows:

private int mIconIdCounter = 1;
private ImageView addIcon(){
    ImageView item = new ImageView(this);
    item.setImageResource( R.drawable.tiles );
    item.setAdjustViewBounds(true);
    RelativeLayout.LayoutParams params = new RelativeLayout.LayoutParams( LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT );
    if( mIconIdCounter != 1 ){
        params.addRule(RelativeLayout.RIGHT_OF, 1 );
    }
    item.setLayoutParams( params );
    item.setId( mIconIdCounter );
    ++m_IconIdCounter;
    return item;
}

and the code to add the item is:

Button addButton = (Button)findViewById(R.id.add_new);
addButton.setOnClickListener( new OnClickListener(){
    @Override
    public void onClick(View view) {
        addContentView( addIcon(), new RelativeLayout.LayoutParams( LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT ) );
    }
});

When I click my button what happens is all the newly created views are placed atop one another. I'd like them to be placed to the right of the next element. I did a quick search on SO for articles relating to RelativeLayout and found some that were similar (here, here, here, and here) but while these addressed getting the content into the RelativeView they didn't seem to address the positioning aspect.

What am I doing wrong?

EDIT:

My main xml looks like:

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    >
    <Button
        android:id="@+id/add_new"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/add_new"
        android:layout_alignParentBottom="true" />
</RelativeLayout>

Knossos · Accepted Answer · 2010-11-24 17:41:01Z

8

It looks like you might be adding the view to the root of the layout xml instead of the RelativeLayout.

You could try:

RelativeLayout layout = (RelativeLayout)findViewById(R.id.my_layout);
layout.addView(addIcon());

answered Nov 24, 2010 at 17:41

Knossos

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2 Comments

wheaties Over a year ago

so if my main xml is nothing more than a RelativeLayout and a Button within it, how do I access it? Just like (R.id.main)? I'll update my question to show you.

Knossos Over a year ago

you need to give your relativelayout an ID with android:id="+@id/my_layout". Then you can instance your layout in your code. so that you can add views to it. hope that helps!

David · Accepted Answer · 2010-11-24 17:42:08Z

0

you are creating new relative layout inside function call. So every time new relative layout created and it added in the view when click button . Use common relative layout.

answered Nov 24, 2010 at 17:42

David

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1 Comment

techi.services Over a year ago

he is creating new layout params each time, not a new layout. it's the addContentView that is the problem.

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