CustomPaintView.java 文件源码

private void init(Context context) {
    mPaint = new Paint();
    mPaint.setAntiAlias(true);

    mPaint.setColor(Color.RED);
    mPaint.setStrokeJoin(Paint.Join.ROUND);
    mPaint.setStrokeCap(Paint.Cap.ROUND);


    mEraserPaint = new Paint();
    mEraserPaint.setAlpha(0);
    mEraserPaint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.DST_IN));
    mEraserPaint.setAntiAlias(true);
    mEraserPaint.setDither(true);
    mEraserPaint.setStyle(Paint.Style.STROKE);
    mEraserPaint.setStrokeJoin(Paint.Join.ROUND);
    mEraserPaint.setStrokeCap(Paint.Cap.ROUND);
    mEraserPaint.setStrokeWidth(40);
}