Question

I am using frame animation for displaying some images. But it’s working only in a button action. I want to call this function when the program starts. How can I achieve this with out a button?

I use the following code for the animation:

public class FrameAnimationActivity extends Activity {
    @Override
    public void onCreate(Bundle savedInstanceState){
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        this.setupButton();
    }
    private void setupButton(){
        Button b = (Button)this.findViewById(R.id.startFAButtonId);
        b.setOnClickListener(
          new Button.OnClickListener(){
            public void onClick(View v){
                parentButtonClicked(v);
            }
          });
    }
    private void parentButtonClicked(View v){
        animate();
    }
    private void animate(){
        ImageView imgView = (ImageView)findViewById(R.id.imageView);
        imgView.setVisibility(ImageView.VISIBLE);
        imgView.setBackgroundResource(R.drawable.frame_animation);
        AnimationDrawable frameAnimation = (AnimationDrawable) imgView.getBackground();
        if (frameAnimation.isRunning()){
            frameAnimation.stop();
        }
        else{
            frameAnimation.stop();
            frameAnimation.start();
        }
    }
}

<animation-list xmlns:android="http://schemas.android.com/apk/res/android" android:oneshot="false">
    <item android:drawable="@drawable/colored-ball1" android:duration="50" />
    <item android:drawable="@drawable/colored-ball2" android:duration="50" />
    <item android:drawable="@drawable/colored-ball3" android:duration="50" />
    <item android:drawable="@drawable/colored-ball4" android:duration="50" />
    <item android:drawable="@drawable/colored-ball5" android:duration="50" />
    <item android:drawable="@drawable/colored-ball6" android:duration="50" />
    <item android:drawable="@drawable/colored-ball7" android:duration="50" />
    <item android:drawable="@drawable/colored-ball8" android:duration="50" />
</animation-list>

Answer 1

On the Android’s Documentation, you can found the following:

“It’s important to note that the start() method called on the AnimationDrawable cannot be called during the onCreate() method of your Activity, because the AnimationDrawable is not yet fully attached to the window. If you want to play the animation immediately, without requiring interaction, then you might want to call it from the onWindowFocusChanged() method in your Activity, which will get called when Android brings your window into focus.”

Hope that helps!