[重写开源框架源码]SwipeBackLayout实现全屏滑动

在日常开发中，导入开源框架有时候不能完成项目的需要，没办法，这时候只好去重写它的部分原来，以达到自己想要的需求。

目录：

SwipeBackLayout开源框架

它可以实现app的侧滑返回，类似他趣中的右滑返回上一个activity。该项目地址：https://github.com/ikew0ng/SwipeBackLayout

但是它不能实现全屏侧滑，可能是笔者自己水碧，尝试了它提供的各种办法都不能实现。于是，索性修改它源码，其实也就增加几句话而已。

① 在SwipeBackLayout.java中，最后那里增加这部分代码

    public static final int FULL_SCREEN_LEFT = ViewDragHelper.EDGE_LEFT;    public static final int FULL_SCREEN_TOP = ViewDragHelper.EDGE_TOP;    public static final int FULL_SCREEN_RIGHT = ViewDragHelper.EDGE_RIGHT;    public static final int FULL_SCREEN_BOTTOM = ViewDragHelper.EDGE_BOTTOM;    public static final int ORIGINAL = 0X31;    public void setSwipeMode(int mode) {        if (mode == SwipeBackLayout.ORIGINAL) {            mDragHelper.setTouchedFullScreen(false, 0);        } else {            mDragHelper.setTouchedFullScreen(true, mode);        }    }

② 在ViewDragHeper.java中，最后那里这个去修改源码

    private int getEdgeTouched(int x, int y) {        int result = 0;        if (touch_flag) {            result = flag;        } else {            if (x < mParentView.getLeft() + mEdgeSize)                result = EDGE_LEFT;            if (y < mParentView.getTop() + mEdgeSize)                result = EDGE_TOP;            if (x > mParentView.getRight() - mEdgeSize)                result = EDGE_RIGHT;            if (y > mParentView.getBottom() - mEdgeSize)                result = EDGE_BOTTOM;        }        return result;    }    private boolean touch_flag;    private int flag;    public void setTouchedFullScreen(boolean touch_flag,int flag) {        this.touch_flag = touch_flag;        this.flag = flag;    }

③然后再activity中调用的时候只需要这样

        getSwipeBackLayout().setSwipeMode(SwipeBackLayout.FULL_SCREEN_LEFT);        getSwipeBackLayout().setEdgeTrackingEnabled(SwipeBackLayout.EDGE_LEFT);

在原来的句子前面增加一句就可以全屏滑动了：

getSwipeBackLayout().setSwipeMode(SwipeBackLayout.FULL_SCREEN_LEFT);

相应的如果你是左滑而不是右滑，只需这样：

getSwipeBackLayout().setSwipeMode(SwipeBackLayout.FULL_SCREEN_RIGHT);getSwipeBackLayout().setSwipeMode(SwipeBackLayout.EDGE_RIGHT);

如果你想通过代码动态改变滑动方式，调用以下：

getSwipeBackLayout().setSwipeMode(SwipeBackLayout.ORIGINAL);