Android Picasso实现圆形图片和圆角图片

1.实现圆形图片

1.1代码调用如下

Picasso.with(mContext).load(headpic).memoryPolicy(MemoryPolicy.NO_CACHE)                           .transform(new CircleTransform(mContext)).into(ivIcon);

1.2自定义圆形图片处理工具类(可以修改圆形图片的半径)

import android.content.Context;import android.graphics.Bitmap;import android.graphics.BitmapShader;import android.graphics.Canvas;import android.graphics.Paint;import com.squareup.picasso.Transformation;/** * Created by xpf on 2017/4/8 :) * Function:Picasso Transformation 实现圆形图片 */public class CircleTransform implements Transformation {    private Context mContext;    private int radius; // 圆形图片半径    public CircleTransform(Context context) {        mContext = context;        radius = DensityUtil.dp2px(mContext, 10);    }    @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;//        float r = radius;        canvas.drawCircle(r, r, r, paint);        squaredBitmap.recycle();        return bitmap;    }    @Override    public String key() {        return "circle";    }}

2.实现圆角图片

2.1代码调用如下

Picasso.with(mContext).load(headpic).memoryPolicy(MemoryPolicy.NO_CACHE)                           .transform(new RoundTransform(mContext)).into(ivIcon);

2.2自定义圆角图片处理工具类(可以修改图片圆角的半径)

import android.content.Context;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;/** * Created by xpf on 2017/4/8 :) * Function:Picasso Transformation 实现圆角图片 */public class RoundTransform implements Transformation {    private Context mContext;    public RoundTransform(Context context) {        mContext = context;    }    @Override    public Bitmap transform(Bitmap source) {        int widthLight = source.getWidth();        int heightLight = source.getHeight();        int radius = DensityUtil.dp2px(mContext, 8); // 圆角半径        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, radius, radius, paintColor);//        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";    }}

今天就到这里吧…

下篇预告：Android Glide实现圆形图片和圆角图片

敬请期待…