你可以使用 View.postDelayed（Runanble r，long delayMillis）。例如：

public void onCreate() {
    ...
    ImageView backgroundImageView = findViewById(R.id.background);
    backgroundImageView.postDelayed(new Runnable() {
        static int i = 0;
        public void run() {
            ImageView.this.setImageResource(
                i++ % 2 == 0 ?
                    R.drawable.background_image1 :
                    R.drawable.background_image2);
            ImageView.this.postDelayed(this, 1000);
        }
    }, 1000);
}