Picasso 图片圆角的实现方式

来源：互联网发布：光栅衍射实验报告数据编辑：程序博客网时间：2024/05/16 05:39

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>

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