Android Picasso实现圆形图片和圆角图片
2017-06-21 21:49
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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…
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