<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:orientation="vertical"    tools:context="www.itcast.com.testglide.MainActivity">    <Button        android:id="@+id/btn"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="Glide" />    <ScrollView        android:layout_width="match_parent"        android:layout_height="wrap_content">        <LinearLayout            android:layout_width="match_parent"            android:layout_height="match_parent"            android:orientation="vertical">            <ImageView                android:id="@+id/iv1"                android:layout_width="match_parent"                android:layout_height="wrap_content" />            <ImageView                android:id="@+id/iv2"                android:layout_width="match_parent"                android:layout_height="wrap_content" />            <ImageView                android:id="@+id/iv3"                android:layout_width="match_parent"                android:layout_height="wrap_content" />        </LinearLayout>    </ScrollView></LinearLayout>

     //显示普通图片                Glide                        .with(this) // 指定Context                        .load(url)// 指定图片的URL                        .placeholder(R.mipmap.ic_launcher)// 指定图片未成功加载前显示的图片                        .error(R.mipmap.ic_launcher)// 指定图片加载失败显示的图片                        .override(300, 300)//指定图片的尺寸                        .fitCenter()//指定图片缩放类型为fitCenter                        .centerCrop()// 指定图片缩放类型为centerCrop                        .skipMemoryCache(true)// 跳过内存缓存                        .diskCacheStrategy(DiskCacheStrategy.NONE)//跳过磁盘缓存                        .diskCacheStrategy(DiskCacheStrategy.SOURCE)//仅仅只缓存原来的全分辨率的图像                        .diskCacheStrategy(DiskCacheStrategy.RESULT)//仅仅缓存最终的图像                        .diskCacheStrategy(DiskCacheStrategy.ALL)//缓存所有版本的图像                        .priority(Priority.HIGH)//指定优先级.Glide 将会用他们作为一个准则，并尽可能的处理这些请求，但是它不能保证所有的图片都会按照所要求的顺序加载。优先级排序:IMMEDIATE > HIGH > NORMAL >　LOW                        .into(iv1);//指定显示图片的ImageView

   //显示圆形图片                class GlideCircleTransform extends BitmapTransformation {                    public GlideCircleTransform(Context context) {                        super(context);                    }                    @Override                    protected Bitmap transform(BitmapPool pool, Bitmap toTransform, int outWidth, int outHeight) {                        return circleCrop(pool, toTransform);                    }                    private Bitmap circleCrop(BitmapPool pool, Bitmap source) {                        if (source == null) return null;                        int size = Math.min(source.getWidth(), source.getHeight());                        int x = (source.getWidth() - size) / 2;                        int y = (source.getHeight() - size) / 2;                        // TODO this could be acquired from the pool too                        Bitmap squared = Bitmap.createBitmap(source, x, y, size, size);                        Bitmap result = pool.get(size, size, Bitmap.Config.ARGB_8888);                        if (result == null) {                            result = Bitmap.createBitmap(size, size, Bitmap.Config.ARGB_8888);                        }                        Canvas canvas = new Canvas(result);                        Paint paint = new Paint();                        paint.setShader(new BitmapShader(squared, BitmapShader.TileMode.CLAMP, BitmapShader.TileMode.CLAMP));                        paint.setAntiAlias(true);                        float r = size / 2f;                        canvas.drawCircle(r, r, r, paint);                        return result;                    }                    @Override                    public String getId() {                        return getClass().getName();                    }                }                Glide                        .with(this) // 指定Context                        .load(url)// 指定图片的URL                        .transform(new GlideCircleTransform(this)) // 指定自定义BitmapTransformation                        .into(iv2);//指定显示图片的ImageView

 //显示圆角图片                class GlideRoundTransform extends BitmapTransformation {                    private float radius = 0f;                    public GlideRoundTransform(Context context) {                        this(context, 4);                    }                    public GlideRoundTransform(Context context, int dp) {                        super(context);                        this.radius = Resources.getSystem().getDisplayMetrics().density * dp;                    }                    @Override protected Bitmap transform(BitmapPool pool, Bitmap toTransform, int outWidth, int outHeight) {                        return roundCrop(pool, toTransform);                    }                    private Bitmap roundCrop(BitmapPool pool, Bitmap source) {                        if (source == null) return null;                        Bitmap result = pool.get(source.getWidth(), source.getHeight(), Bitmap.Config.ARGB_8888);                        if (result == null) {                            result = Bitmap.createBitmap(source.getWidth(), source.getHeight(), Bitmap.Config.ARGB_8888);                        }                        Canvas canvas = new Canvas(result);                        Paint paint = new Paint();                        paint.setShader(new BitmapShader(source, BitmapShader.TileMode.CLAMP, BitmapShader.TileMode.CLAMP));                        paint.setAntiAlias(true);                        RectF rectF = new RectF(0f, 0f, source.getWidth(), source.getHeight());                        canvas.drawRoundRect(rectF, radius, radius, paint);                        return result;                    }                    @Override public String getId() {                        return getClass().getName() + Math.round(radius);                    }                }                Glide                        .with(this) // 指定Context                        .load(url)// 指定图片的URL                        .transform(new GlideRoundTransform(this,30)) // 指定自定义BitmapTransformation                        .into(iv3);//指定显示图片的ImageView