Android圆角图片

相比较于iOS实现圆角图片，Android的方式还是复杂些???

参考How to make an ImageView with rounded corners?

1.绘制圆角矩形，在绘制bitmap，通过设置setXfermode为SRC_IN来实现

setXfermode相关解释可参考HenCoder Android 开发进阶: 自定义 View 1-2 Paint 详解

如下的代码：

    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        mImageView = (ImageView) findViewById(R.id.imageView);        Bitmap bitmap = BitmapFactory.decodeResource(getResources(), R.drawable.facebook);        mImageView.setImageBitmap(getRoundedCornerBitmap(bitmap, 100));    }    private Bitmap getRoundedCornerBitmap(Bitmap bitmap, int pixels) {        Bitmap output = Bitmap.createBitmap(bitmap.getWidth(), bitmap.getHeight(), Bitmap.Config.ARGB_8888);        Canvas canvas = new Canvas(output);        Paint paint = new Paint();        Rect rect = new Rect(0, 0, bitmap.getWidth(), bitmap.getHeight());        RectF rectF = new RectF(rect);        float roundPx = pixels;        paint.setAntiAlias(true);        canvas.drawARGB(0, 0, 0, 0);        paint.setColor(Color.RED);//颜色随便设？        canvas.drawRoundRect(rectF, roundPx , roundPx, paint);        paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.SRC_IN));        canvas.drawBitmap(bitmap, rect, rect, paint);        return output;    }

其它

Android圆角图片和圆形图片实现总结

Android圆角图片

Android圆角图片

其它

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