Creating AnimationDrawable from assets
<p>I locate several .png files (frames of my animation) in <code>assets</code> folder, than I fetch them using <code>AssetManager</code> in my <code>Activity</code>'s <code>onCreate()</code> method and fill my <code>AnimationDrawable</code> with them. As described in dev guide it's impossible to start Animation in <code>onCreate()</code> method and if I need to start it immediately than I should override <code>onWindowFocusChanged()</code> method. But even in such implementation my drawable object doesn't appears on the screen. Here is the code of my Activity:</p>

<pre><code>package org.example.Animation;

import java.io.IOException;

import android.app.Activity;
import android.content.res.AssetManager;
import android.graphics.drawable.AnimationDrawable;
import android.graphics.drawable.Drawable;
import android.os.Bundle;
import android.util.Log;
import android.view.MotionEvent;
import android.widget.ImageView;
import android.widget.LinearLayout;

public class MainActivity extends Activity {
    private LinearLayout ll;
    private ImageView image;
    private AnimationDrawable ad;

    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        ll = new LinearLayout(this);

        LinearLayout.LayoutParams lp = new LinearLayout.LayoutParams(-2, -2);
        image = new ImageView(this);
        ll.addView(image, lp);
        setContentView(ll);


        AssetManager am = getAssets();
        ad = new AnimationDrawable();
        StringBuilder sb= new StringBuilder("loader/loader-");

        // Fetching frames from assets
        for(int i = 1; i &lt; 11; i++) {
            sb.append(i);
            sb.append(".png");
            Log.d("DownloadImageTask", "Fetching image: " + sb.toString());         
            try {
                Drawable d = Drawable.createFromStream(am.open(sb.toString()), null);
                ad.addFrame(d, 500);                                        
            } 
            catch (IOException e) {
                Log.d("ImageViewAdapter", "IOException: " + e.getMessage());
            }
            sb.delete(14, sb.length()); // 14 - is the index of first digit of frame
        }

        image.setBackgroundDrawable(ad);                            
    }

    @Override
    public void onWindowFocusChanged(boolean hasFocus) {        
        super.onWindowFocusChanged(hasFocus);
        ad.start();
    }
} 
</code></pre>

<p>Tell me please what is wrong in my code?</p>

<p><strong>P.S</strong>
Please, don't ask me why I'm not using xml file. In shorts my main goal is to avoid uisng of R.java file.</p>
