安卓滑动占位符大小

android java android-layout android-glide

2022-09-03 01:33:46

我有一个安卓Glide的问题。我试图快速交换我的图像，它们只是变成所有占位符大小，而我的占位符图像非常小。那么我需要做什么呢？

也许我需要检查它是否加载或什么，但我不知道如何。

Glide.with(this)
    .load(quest.get(id).getImage())
    .placeholder(R.drawable.load)
    .fitCenter()
    .crossFade()
    .into(imageView);

答案 1

根据Glide GitHub页面上的这个问题，您可以通过在Glide请求中添加以下行来修复它：

  .dontAnimate()

这将使您的满载线：

  Glide.with(context)
            .load("http://lorempixel.com/150/150")
            .placeholder(R.drawable.no_image)
            .override(100, 100)
            .dontAnimate()
            .into(imageView);

答案 2

我这样做如下：

这个想法是将比例类型设置为占位符最初需要的，并附加侦听器，以便在下载图像后再次将比例类型更改为下载的图像所需的比例类型。

//ivBuilderLogo = Target ImageView
//Set the scale type to as required by your place holder
//ScaleType.CENTER_INSIDE will maintain aspect ration and fit the placeholder inside the image view
holder.ivBuilderLogo.setScaleType(ImageView.ScaleType.CENTER_INSIDE); 

//AnimationDrawable is required when you are using transition drawables
//You can directly send resource id to glide if your placeholder is static
//However if you are using GIFs, it is better to create a transition drawable in xml 
//& use it as shown in this example
AnimationDrawable animationDrawable;
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP)
     animationDrawable=(AnimationDrawable)context.getDrawable(R.drawable.anim_image_placeholder);
else
     animationDrawable=(AnimationDrawable)context.getResources().getDrawable(R.drawable.anim_image_placeholder);
animationDrawable.start();

Glide.with(context).load(logo_url)
                   .placeholder(animationDrawable)
                   .listener(new RequestListener<String, GlideDrawable>() {
                        @Override
                        public boolean onException(Exception e, String model, Target<GlideDrawable> target, boolean isFirstResource)
                        {
                           return false;
                        }

                        //This is invoked when your image is downloaded and is ready 
                        //to be loaded to the image view
                        @Override
                        public boolean onResourceReady(GlideDrawable resource, String model, Target<GlideDrawable> target, boolean isFromMemoryCache, boolean isFirstResource)
                        {   
                        //This is used to remove the placeholder image from your ImageView 
                        //and load the downloaded image with desired scale-type(FIT_XY in this case)
                        //Changing the scale type from 'CENTER_INSIDE' to 'FIT_XY' 
                        //will stretch the placeholder for a (very) short duration,
                        //till the downloaded image is loaded
                        //setImageResource(0) removes the placeholder from the image-view 
                        //before setting the scale type to FIT_XY and ensures that the UX 
                        //is not spoiled, even for a (very) short duration
                            holder.ivBuilderLogo.setImageResource(0);
                            holder.ivBuilderLogo.setScaleType(ImageView.ScaleType.FIT_XY);
                            return false;
                        }
                    })
                    .into( holder.ivBuilderLogo);

我的过渡可绘制（R.drawable.anim_image_placeholder）：

（如果使用静态图像，则不需要）

<?xml version="1.0" encoding="utf-8"?>
<animation-list
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:oneshot="false">
    <item android:drawable="@drawable/loading_frame1" android:duration="100" />
    <!--<item android:drawable="@drawable/loading_frame2" android:duration="100" />-->
    <item android:drawable="@drawable/loading_frame3" android:duration="100" />
    <!--<item android:drawable="@drawable/loading_frame4" android:duration="100" />-->
    <item android:drawable="@drawable/loading_frame5" android:duration="100" />
    <!--<item android:drawable="@drawable/loading_frame6" android:duration="100" />-->
    <item android:drawable="@drawable/loading_frame7" android:duration="100" />
    <!--<item android:drawable="@drawable/loading_frame8" android:duration="100" />-->
    <item android:drawable="@drawable/loading_frame9" android:duration="100" />
    <!--<item android:drawable="@drawable/loading_frame10" android:duration="100" />-->
</animation-list>