配合Picasso使用的圆形图片

利用Picasso的Transformation显示圆形图片，注意需要添加Picasso的依赖。

package com.ryw.demo;
/**
 * Created by Mr_Shadow on 2017/7/27.
 * <p>
 * 配合Picasso裁剪圆形图片
 */
import android.graphics.Bitmap;
import android.graphics.BitmapShader;
import android.graphics.Canvas;
import android.graphics.Matrix;
import android.graphics.Paint;
import com.squareup.picasso.Transformation;
public class CropCircleTransformation implements Transformation {
@Override
public Bitmap transform(Bitmap source) {
    int size = Math.min(source.getWidth(), source.getHeight());

    int w = (source.getWidth() - size) / 2;
    int h = (source.getHeight() - size) / 2;

    Bitmap bitmap = Bitmap.createBitmap(size, size, Bitmap.Config.ARGB_8888);

    Canvas canvas = new Canvas(bitmap);
    Paint paint = new Paint();
    BitmapShader shader =
            new BitmapShader(source, BitmapShader.TileMode.CLAMP, BitmapShader.TileMode.CLAMP);
    if (w != 0 || h!= 0) {
        Matrix matrix = new Matrix();
        matrix.setTranslate(-w, -h);
        shader.setLocalMatrix(matrix);
    }
    paint.setShader(shader);
    paint.setAntiAlias(true);

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

    source.recycle();

    return bitmap;
}

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

}

ImageView iv = (ImageView) findViewById(R.id.iv);
Picasso.with(this).load("https://misc.360buyimg.com/mtd/pc/index/home/images/logo.v2.png") .transform(new CropCircleTransformation()).into(iv);

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最后编辑时间为: 2017/07/27 13:44