Android viewpager slide when there is no effect ah

Such as the title , but did not want a card that is also the kind of sliding
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read a book effect before the demo source code, useless viewpager
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folding effect are directly canvas painting , Bezier curve drawing
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how Meirenhuida ah ?
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I did not understand the problem
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when there is a sliding effect is similar to the kind of open book

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kind of open book with no
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it is used viewgroup do ?