修正一处Sleep抛出异常导致画布未被释放的错误

Signed-off-by: Takashiro <takashiro@qq.com>
未检测到热点3.5秒后自动返回摄像界面

Signed-off-by: Takashiro <takashiro@qq.com>
修改启动画面为自适应屏幕

Signed-off-by: Takashiro <takashiro@qq.com>
选择最大分辨率照片

Signed-off-by: Takashiro <takashiro@qq.com>