Glide4.0の基本的な使い方

1、Glide 4.0とGlide 3.xの使い方の違いが大きいのでまとめます.
Glide 3.xでのネットワークピクチャのロードは、通常、プリロードとロードに失敗したピクチャのデフォルト表示に慣れています.
String path= "https://inthecheesefactory.com/uploads/source/glidepicasso/cover.jpg";
Glide.with(activity).load(path).placeholder(R.mipmap.ic_launcher).error(R.mipmap.ic_launcher).into(imageView);
4.0ではこのようなメソッドを直接呼び出すことはできません.RequestOptionというクラスを使用する必要があります.具体的な使い方は次のとおりです.

RequestOptions options = new RequestOptions()
        .centerCrop()
        .placeholder(R.mipmap.ic_launcher)
        .error(R.mipmap.ic_launcher)
        .priority(Priority.HIGH);

 
  
Glide.with(this).load(path).apply(options).into(imageView);
  
2、  Glide4.0      
  
                ，      ：
  
  
public class GlideCircleTransform extends BitmapTransformation {

    public GlideCircleTransform() {
        super();
    }

    @Override
    public Bitmap transform(BitmapPool pool, Bitmap toTransform,
  
                          int outWidth, int outHeight) {
        return circleCrop(pool, toTransform);
    }

    private static 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 void updateDiskCacheKey(MessageDigest messageDigest) {

    }
}
  
    RequestOptions:
  
 
  
RequestOptions options = new RequestOptions()
        .centerCrop()
        .placeholder(R.mipmap.ic_launcher)
        .error(R.mipmap.ic_launcher)
        .priority(Priority.HIGH)
        .transform(new GlideCircleTransform());
 glide表示ピクチャを呼び出す:
Glide.with(this).load(path).apply(options).into(imageView);
  
	
 3、Glide 4を使用する.0フィレットされた画像を表示
                    
  
 
  
public class GlideRoundTransform extends BitmapTransformation {
    private static float radius = 0f;

    public GlideRoundTransform() {
        this(4);
    }

    public GlideRoundTransform(int dp) {
        super();
        this.radius = Resources.getSystem().getDisplayMetrics().density * dp;
    }

    @Override protected Bitmap transform(BitmapPool pool, Bitmap toTransform, int outWidth, int outHeight) {
        return roundCrop(pool, toTransform);
    }

    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;
    }

    @Override
    public void updateDiskCacheKey(MessageDigest messageDigest) {

    }
}
  
 
  
    RequestOptions:
  
 
  
RequestOptions options = new RequestOptions()
        .centerCrop()
        .placeholder(R.mipmap.ic_launcher)
        .error(R.mipmap.ic_launcher)
        .priority(Priority.HIGH)
        .transform(new GlideRoundTransform());
 glide表示ピクチャを呼び出す:
Glide.with(this).load(path).apply(options).into(imageView);
  
       Glide4.0      。
  
  ：   RequestOption                         。
  
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