Android 實戰記錄 (19) - ViewPager 滑動速度

因為要做輪播，但輪播速度過快，導致
需要調整滑動速度
參考以下這個解

 http://my.oschina.net/javalover/blog/179003

public class FixedSpeedScroller extends Scroller {

    private int mDuration = 1500;

    public FixedSpeedScroller(Context context) {

        super(context);

    }

    public FixedSpeedScroller(Context context, Interpolator interpolator) {

        super(context, interpolator);

    }

    @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);

    }

    public void setmDuration(int time) {

        mDuration = time;

    }

    public int getmDuration() {

        return mDuration;

    }

}

try {

    Field field = ViewPager.class.getDeclaredField("mScroller");

    field.setAccessible(true);

    FixedSpeedScroller scroller = new FixedSpeedScroller(mViewPager.getContext(),

         new AccelerateInterpolator());

    field.set(mViewPager, scroller);

    scroller.setmDuration(2000);

} catch (Exception e) {

    LogUtils.e(TAG, "", e);

}