First, set the placeholder map:

 RequestOptions options = new RequestOptions()
                .placeholder(R.drawable.img_default)// Display the image before the image is loaded
                .fallback( R.drawable.img_blank) // The image to display when the URL is empty
                .error(drawable.img_load_failure);// The image is displayed after the image fails to load

Glide.with(this)
                .load(URL) // Image address
                .apply(options)
                .into(ImagView); 
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Other relevant knowledge:

Glide4 sets the image rounded corners

2.1. The first method:

RequestOptions options = new RequestOptions(). error(R.drawable.img_load_failure). bitmapTransform(new RoundedCorners(30)); With (this).load(URL) // Image address.apply(options).into(ImagView);Copy the code

2.2. The second way:

RequestOptions requestOptions = new RequestOptions(); requestOptions.placeholder(R.drawable.ic_launcher_background); requestOptions.circleCropTransform(); requestOptions.transforms( new RoundedCorners(30)); Glide. With (this).load(URL) // Image address.apply(options).into(ImagView);Copy the code

2.3. The third way:

RequestOptions options = new RequestOptions() .centerCrop() .transform(new RoundTransform(this,30)); Glide. With (this).load(URL) // Image address.apply(options).into(ImagView);Copy the code
public class RoundTransform extends BitmapTransformation { 
    private static float radius = 0f; 
    public RoundTransform(Context context) { 
        this(context, 4); 
    } 
   
    public RoundTransform(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) { 
        Bitmap bitmap = TransformationUtils.centerCrop(pool, toTransform, outWidth, outHeight); 
        return roundCrop(pool, bitmap); 
    } 
   
    private static 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; 
    } 
   
    public String getId() { 
        return getClass().getName() + Math.round(radius); 
    } 
   
    @Override 
    public void updateDiskCacheKey(MessageDigest messageDigest) { 
   
    } 
   
} 
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