有没有办法使用Glide来分配一个占位符,但是将这个图像保持原来的大小？
我有一个可变大小的 ImageView(取决于传入的图像),我在调用Glide.with().load().into()之前设置,我想使用占位符,但不希望PH被调整为ImageView的大小,我希望它保持原来的大小.
到目前为止,我找不到办法.
我有一个可变大小的 ImageView(取决于传入的图像),我在调用Glide.with().load().into()之前设置,我想使用占位符,但不希望PH被调整为ImageView的大小,我希望它保持原来的大小.
到目前为止,我找不到办法.
解决方法
Re：
Gregs comment：
我给了另一个镜头(几乎一年的额外的XP),并提出了这一点：
我给了另一个镜头(几乎一年的额外的XP),并提出了这一点：
<ImageView android:scaleType="center" ... />
类似于我的其他解决方案和以下动画包装器：
...
.fitCenter()
.animate(new PaddingAnimationFactory<>(new DrawableCrossFadeFactory<GlideDrawable>(2000)))
.into(imageView)
;
class PaddingAnimationFactory<T extends Drawable> implements GlideAnimationFactory<T> {
private final DrawableCrossFadeFactory<T> realFactory;
@Override public GlideAnimation<T> build(boolean isFromMemoryCache,boolean isFirstResource) {
return new PaddingAnimation<>(realFactory.build(isFromMemoryCache,isFirstResource));
}
}
class PaddingAnimation<T extends Drawable> implements GlideAnimation<T> {
private final GlideAnimation<? super T> realAnimation;
@Override public boolean animate(T current,final ViewAdapter adapter) {
int width = current.getIntrinsicWidth();
int height = current.getIntrinsicHeight();
return realAnimation.animate(current,new PaddingViewAdapter(adapter,width,height));
}
}
class PaddingViewAdapter implements ViewAdapter {
@Override public Drawable getCurrentDrawable() {
Drawable drawable = realAdapter.getCurrentDrawable();
if (drawable != null) {
int padX = Math.max(0,targetWidth - drawable.getIntrinsicWidth()) / 2;
int padY = Math.max(0,targetHeight - drawable.getIntrinsicHeight()) / 2;
if (padX != 0 || padY != 0) {
drawable = new InsetDrawable(drawable,padX,padY,padY);
}
}
return drawable;
}
@Override public void setDrawable(Drawable drawable) {
if (VERSION.SDK_INT >= VERSION_CODES.M && drawable instanceof TransitionDrawable) {
// For some reason padding is taken into account differently on M than before in LayerDrawable
// PaddingMode was introduced in 21 and gravity in 23,I think NO_GRAVITY default may play
// a role in this,but didn't have time to dig deeper than this.
((TransitionDrawable)drawable).setPaddingMode(TransitionDrawable.PADDING_MODE_STACK);
}
realAdapter.setDrawable(drawable);
}
}
省略实现的平凡部分,每个类的构造函数从参数初始化字段.完整代码可在GitHub in TWiStErRob/glide-support.
如果您停留在较旧版本的Glide(3.8.0之前),则可以通过以下方式实现相同的效果：
.fitCenter()
.placeholder(R.drawable.glide_placeholder)
.crossFade(2000)
.into(new GlideDrawableImageViewTarget(imageView) {
@Override public void onResourceReady(GlideDrawable resource,GlideAnimation<? super GlideDrawable> animation) {
super.onResourceReady(resource,new PaddingAnimation<>(animation));
}
})
