对于有些大点的Gif在低端机上加载可能会需要点时间，所以我们可以加个回调加个弹框会友好点
showPleaseDialog("加载中...");
Glide.with(getApplicationContext())
.load(GlobalPath
.RES_IMAGE + template_images_preview[postion - 1])
.into(new GlideDrawableImageViewTarget(iv_preview) {
@Override
public void onResourceReady(GlideDrawable resource, GlideAnimation<? super GlideDrawable> animation) {
super.onResourceReady(resource, animation);
dismiss();
}
});
