放大或缩小后在android中裁剪图像的特定部分

Question

我想在

之后裁剪图像的特定部分（图库或相机图像）

放大或缩小，就像android.i中的这个给定图像一样，我在android.please中的新功能帮助了我。谢谢你。

Answer 1

看一下android.graphics.Bitmap，你可以使用下面的API来裁剪位图。如果愿意，您可以学习API createScaledBitmap（）。

/**
 * Returns an immutable bitmap from the specified subset of the source
 * bitmap. The new bitmap may be the same object as source, or a copy may
 * have been made. It is initialized with the same density as the original
 * bitmap.
 *
 * @param source   The bitmap we are subsetting
 * @param x        The x coordinate of the first pixel in source
 * @param y        The y coordinate of the first pixel in source
 * @param width    The number of pixels in each row
 * @param height   The number of rows
 * @return A copy of a subset of the source bitmap or the source bitmap itself.
 * @throws IllegalArgumentException if the x, y, width, height values are
 *         outside of the dimensions of the source bitmap, or width is <= 0,
 *         or height is <= 0
 */
public static Bitmap createBitmap(Bitmap source, int x, int y, int width, int height) {
    return createBitmap(source, x, y, width, height, null, false);
}

Answer 2

现在有很多图书馆可以满足您的要求。您可以使用 https://github.com/albinmathew/PhotoCrop用于将特定区域裁剪为方形或圆形，具有放大/缩小功能。