Glide顯示圓形和圓角圖片

一、加載圓形圖片

1、工具類

/**
 * author：Geoffery Sun
 * time：2017/9/16 10:47
 * desc：加載圓形圖片
 * version：1.7
 */
public 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 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 String getId() {
        return getClass().getName();
    }
}

2、使用方法

Glide.with(mContext)
            .load(imgUrl)
            .transform(new GlideCircleTransform(mContext))
            .into(imgView);

二、加載圓角圖片

1、工具類

/**
 * author：Geoffery Sun
 * time：2017/9/16 10:54
 * desc：Glide 圓角 Transform
 * version：1.7
 */
public class GlideRoundTransform extends BitmapTransformation {

    private static float radius = 0f;

    /**
     * 構造函數 默認圓角半徑 4dp
     *
     * @param context Context
     */
    public GlideRoundTransform(Context context) {
        this(context, 4);
    }

    /**
     * 構造函數
     *
     * @param context Context
     * @param dp      圓角半徑
     */
    public GlideRoundTransform(Context context, int dp) {
        super(context);
        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 String getId() {
        return getClass().getName() + Math.round(radius);
    }
}

2、使用方法

Glide.with(mActivity)
         .load(imgUrl)
         .transform(new GlideRoundTransform(mActivity, 3))
         .into(bgImg);