ScrollingActivity.java 文件源码

public Bitmap captureView(View view) {
    //Find the view we are after
    //Create a Bitmap with the same dimensions
    Bitmap image = Bitmap.createBitmap(view.getMeasuredWidth(),
            view.getMeasuredHeight(),
            Bitmap.Config.ARGB_4444); //reduce quality and remove opacity
    //Draw the view inside the Bitmap
    Canvas canvas = new Canvas(image);
    view.draw(canvas);

    //Make it frosty
    Paint paint = new Paint();
    paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.SRC_IN));
    ColorFilter filter = new LightingColorFilter(0xFFFFFFFF, 0x00222222); // lighten
    //ColorFilter filter = new LightingColorFilter(0xFF7F7F7F, 0x00000000);    // darken
    paint.setColorFilter(filter);
    canvas.drawBitmap(image, 0, 0, paint);

    return image;
}