使用毕加索创建圆形图像[重复]答案

【问题标题】：Create circular image using picasso [duplicate]使用毕加索创建圆形图像[重复]
【发布时间】：2018-03-02 15:04:34
【问题描述】：

我想从 web url 加载 profiler 图片图像，并从资源中使用 Picasso 库使其循环。我正在这样做，

dependencies {
    compile 'com.squareup.picasso:picasso:2.4.0'
}

从资源中加载图片 (R.drawable.profile_sample)，

Picasso.with(getApplicationContext()).load(R.drawable.profile_sample).placeholder(setCircularImage(R.drawable.profile_sample)).into(imageView_ProfilePic);

同样来自网址，

Picasso.with(getApplicationContext()).load("http://shidhints.com").placeholder(setCircularImage(R.drawable.profile_sample)).into(imageView_ProfilePic);

我还使用 setCircularImage() 将图像从资源变为圆形。

private RoundedBitmapDrawable setCircularImage(int id) {
        Resources res = getApplicationContext().getResources();
        Bitmap src = BitmapFactory.decodeResource(res, id);
        RoundedBitmapDrawable roundedBitmapDrawable = RoundedBitmapDrawableFactory.create(res, src);
        roundedBitmapDrawable.setCornerRadius(Math.max(src.getWidth(), src.getHeight()) / 2.0f);
        return roundedBitmapDrawable;
    }

【问题讨论】：

stackoverflow.com/questions/30664254/…
stackoverflow.com/questions/26112150/…
嘿伙计使用圆形图像视图库github.com/hdodenhof/CircleImageView 并使用毕加索加载它。

标签： android imageview transform picasso

【解决方案1】：

我创建了一个类CircleTransform.java 来使图像变成圆形，并修改了代码以从类似处加载图像，

Picasso.with(getApplicationContext()).load(R.drawable.profile_sample).placeholder(setCircularImage(R.drawable.profile_sample)).transform(new CircleTransform()).into(imageView_ProfilePic);

同样来自网址，

Picasso.with(getApplicationContext()).load("http://shidhints.com").placeholder(setCircularImage(R.drawable.profile_sample)).transform(new CircleTransform()).into(imageView_ProfilePic);

CircleTransform.java

public class CircleTransform  implements Transformation {

    @Override
    public Bitmap transform(Bitmap source) {
        int size = Math.min(source.getWidth(), source.getHeight());

        int x = (source.getWidth() - size) / 2;
        int y = (source.getHeight() - size) / 2;

        Bitmap squaredBitmap = Bitmap.createBitmap(source, x, y, size, size);
        if (squaredBitmap != source) {
            source.recycle();
        }

        Bitmap bitmap = Bitmap.createBitmap(size, size, source.getConfig());

        Canvas canvas = new Canvas(bitmap);
        Paint paint = new Paint();
        BitmapShader shader = new BitmapShader(squaredBitmap, BitmapShader.TileMode.CLAMP, BitmapShader.TileMode.CLAMP);
        paint.setShader(shader);
        paint.setAntiAlias(true);

        float r = size/2f;
        canvas.drawCircle(r, r, r, paint);

        squaredBitmap.recycle();
        return bitmap;
    }

    @Override
    public String key() {
        return "circle";
    }
}

【讨论】：