android - 在android中合并图像

Question

如何通过java编程在android中合并两个图像并保存在外部SD卡或其他地方。

Answer 1

试试下面的代码

private Bitmap joinImages(File first, File second)
{
    Bitmap bmp1, bmp2;
    bmp1 = BitmapFactory.decodeFile(first.getPath());
    bmp2 = BitmapFactory.decodeFile(second.getPath());
    if (bmp1 == null || bmp2 == null)
        return bmp1;
    int height = bmp1.getHeight();
    if (height < bmp2.getHeight())
        height = bmp2.getHeight();

    Bitmap bmOverlay = Bitmap.createBitmap(bmp1.getWidth() + bmp2.getWidth(), height, Bitmap.Config.ARGB_8888);
    Canvas canvas = new Canvas(bmOverlay);
    canvas.drawBitmap(bmp1, 0, 0, null);
    canvas.drawBitmap(bmp2, bmp1.getWidth(), 0, null);
    return bmOverlay;
}