android 二维码扫描出现错误 save( ) in Canvas cannot be applied int

最新推荐文章于 2024-06-27 15:22:19 发布

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本文解析了Android中Canvas.save(Canvas.ALL_SAVE_FLAG)被废弃的原因，推荐使用无参数的save()替代，以简化代码并提高效率。

将：
canvas.save(Canvas.ALL_SAVE_FLAG);
改：
canvas.save()

原因：

带参数的函数已经被抛弃，替换为无参的那个，可以在源码中看到解释。

/**
     * Based on saveFlags, can save the current matrix and clip onto a private
     * stack.
     * <p class="note"><strong>Note:</strong> if possible, use the
     * parameter-less save(). It is simpler and faster than individually
     * disabling the saving of matrix or clip with this method.
     * <p>
     * Subsequent calls to translate,scale,rotate,skew,concat or clipRect,
     * clipPath will all operate as usual, but when the balancing call to
     * restore() is made, those calls will be forgotten, and the settings that
     * existed before the save() will be reinstated.
     *
     * @removed
     * @deprecated Use {@link #save()} instead.
     * @param saveFlags flag bits that specify which parts of the Canvas state
     *                  to save/restore
     * @return The value to pass to restoreToCount() to balance this save()
     */
    public int save(@Saveflags int saveFlags) {
        return nSave(mNativeCanvasWrapper, saveFlags);
    }

参考：

https://www.yunbook.vip/post/1550672271263.html