Android: Setting Background Image for RelativeLayout?

Question

I have downloaded an image at runtime. Now I want to set it as a background for RelativeLayout. Does it possible?

Answer 1

In the onCreate function:

RelativeLayout baseLayout = (RelativeLayout) this.findViewById(R.id.the_layout_id);

Drawable drawable = loadImageFromAsset();

if(drawable != null){
    baseLayout.setBackground(drawable);
    Log.d("TheActivity", "Setting the background");
}

The image loading method:

public Drawable loadImageFromAsset() {

    Drawable drawable;

    // load image
    try {

        // get input stream
        InputStream ims = getAssets().open("images/test.9.png");

        //Note: Images can be in hierarical 

        // load image as Drawable
        drawable = Drawable.createFromStream(ims, null);

    }
    catch(IOException ex) {
        Log.d("LoadingImage", "Error reading the image");
        return null;
    }

    return drawable;
}

The open method:

> public final InputStream open (String fileName, int accessMode)
> 
> Added in API level 1 Open an asset using an explicit access mode,
> returning an InputStream to read its contents. This provides access to
> files that have been bundled with an application as assets -- that is,
> files placed in to the "assets" directory.
> 
> fileName --- The name of the asset to open. This name can be hierarchical.
> 
> accessMode --- Desired access mode for retrieving the data.
> 
> Throws IOException