Picasso 图片圆角的实现方式

最新推荐文章于 2023-04-12 14:07:02 发布

wbb19900209

最新推荐文章于 2023-04-12 14:07:02 发布

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分类专栏： Android 文章标签： Android Picasso 圆角头像

本文链接：https://blog.youkuaiyun.com/wbb19900209/article/details/50894910

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本文介绍如何利用Picasso库及其自定义Transformation实现图片的圆角矩形和圆形显示效果，并提供具体代码实例。

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通过Picasso提供的Transformation实现

圆角矩形

import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.PorterDuff;
import android.graphics.PorterDuffXfermode;
import android.graphics.Rect;
import android.graphics.RectF;

import com.squareup.picasso.Transformation;

public class PicassoRoundTransform implements Transformation {

    @Override
    public Bitmap transform(Bitmap source) {
        int widthLight = source.getWidth();
        int heightLight = source.getHeight();

        Bitmap output = Bitmap.createBitmap(source.getWidth(), source.getHeight(), Bitmap.Config.ARGB_8888);

        Canvas canvas = new Canvas(output);
        Paint paintColor = new Paint();
        paintColor.setFlags(Paint.ANTI_ALIAS_FLAG);

        RectF rectF = new RectF(new Rect(0, 0, widthLight, heightLight));

        canvas.drawRoundRect(rectF, widthLight / 5, heightLight / 5, paintColor);

        Paint paintImage = new Paint();
        paintImage.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.SRC_ATOP));
        canvas.drawBitmap(source, 0, 0, paintImage);
        source.recycle();
        return output;
    }

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



}
用法：

Picasso.with(UserDetialActivity.this).load(imageId).error(R.mipmap.ic_launcher).transform(new PicassoRoundTransform()).into(user_detail_header);

圆形图片：

<pre style="background-color: rgb(255, 255, 255);"><pre><span style="font-family:FangSong_GB2312;font-size:12px;">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";
    }
}</span>