改变ViewPager滑动速度_public int mduration=1500;-优快云博客

本文链接：https://blog.youkuaiyun.com/Android0120/article/details/44487899

本文介绍了一种通过自定义FixedSpeedScroller类来修改Android中ViewPager滚动速度的方法。该方法利用反射机制设置ViewPager内部使用的Scroller，并覆盖了startScroll方法以实现固定时长的滚动效果。

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代码如下：

try {
Interpolator sInterpolator = new AccelerateInterpolator();
Field mScroller = ViewPager.class.getDeclaredField("mScroller");
mScroller.setAccessible(true);
FixedSpeedScroller scroller = new FixedSpeedScroller(
mViewPager.getContext(), sInterpolator);
mScroller.set(mViewPager, scroller);
} catch (NoSuchFieldException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IllegalArgumentException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IllegalAccessException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}

FixedSpeedScroller类的代码：

@SuppressLint("NewApi")
public class FixedSpeedScroller extends Scroller {

private int mDuration = 400;//滑动所用时间

public FixedSpeedScroller(Context context) {
super(context);
}

public FixedSpeedScroller(Context context, Interpolator interpolator) {
super(context, interpolator);
}

public FixedSpeedScroller(Context context, Interpolator interpolator,
boolean flywheel) {
super(context, interpolator, flywheel);
}

@Override
public void startScroll(int startX, int startY, int dx, int dy, int duration) {
// Ignore received duration, use fixed one instead
super.startScroll(startX, startY, dx, dy, mDuration);
}

@Override
public void startScroll(int startX, int startY, int dx, int dy) {
// Ignore received duration, use fixed one instead
super.startScroll(startX, startY, dx, dy, mDuration);
}

}