android之cannot convert from Fragment1 to Fragment
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在写一个音乐播放器的时候,用到了fragment,结果在需要返回Fragment的方法里面,无法将Fragment1(Fragment的子类)强制转换成Fragment,
很是纳闷,我是参照一个开源代码来做的,源码里面很正常,我这里却报错,
后来才发现,是对包的导入出现了差错,在Fragment1中导入的是android.app.Fragment
而在出错的那个类里面是用android.support.v4.app.Fragment,包不同当然无法转换
后来统一导入为android.support.v4.app.Fragment之后就正常了.
往往是这样的不细心造成的小错误最难发现,也最让人纠结.
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