加载圆形图片

fastDevelop/src/main/java/com/mayi/fastdevelop/view/CircleTransform.java

 package com.mayi.fastdevelop.view;
 
 import android.graphics.Bitmap;
-import android.graphics.BitmapShader;
 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;
 
@@ -14,24 +17,25 @@ 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;
+        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 / 2, heightLight / 2, 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() {