MainActivity.java 文件源码

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    int id = item.getItemId();

    if (id == R.id.action_list_to_grid) {
        if (!((Animatable) item.getIcon()).isRunning()) {
            if (gridLayoutManager.getSpanCount() == 1) {
                item.setIcon(AnimatedVectorDrawableCompat.create(MainActivity.this, R.drawable.avd_list_to_grid));
                gridLayoutManager.setSpanCount(3);
            } else {
                item.setIcon(AnimatedVectorDrawableCompat.create(MainActivity.this, R.drawable.avd_grid_to_list));
                gridLayoutManager.setSpanCount(1);
            }
            ((Animatable) item.getIcon()).start();
            simpleAdapter.notifyItemRangeChanged(0, simpleAdapter.getItemCount());
        }
        return true;
    }

    return super.onOptionsItemSelected(item);
}