對于有些大點的Gif在低端機上加載可能會需要點時間践险，所以我們可以加個回調(diào)加個彈框會友好點
showPleaseDialog("加載中...");
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();
}
});
