废话不多说了，直接给大家贴代码了，具体代码如下所示：
public class BounceBackViewPager extends ViewPager { private int currentPosition = 0; private Rect mRect = new Rect();//用来记录初始位置 private boolean handleDefault = true; private float preX = 0f; private static final float RATIO = 0.5f;//摩擦系数 private static final float SCROLL_WIDTH = 10f; public BounceBackViewPager(Context context) { super(context); } public BounceBackViewPager(Context context, AttributeSet attrs) { super(context, attrs); } @Override public boolean dispatchKeyEvent(KeyEvent event) { return super.dispatchKeyEvent(event); } @Override public boolean onInterceptTouchEvent(MotionEvent ev) { if (ev.getAction() == MotionEvent.ACTION_DOWN) { preX = ev.getX();//记录起点 currentPosition = getCurrentItem(); } return super.onInterceptTouchEvent(ev); } @Override public boolean onTouchEvent(MotionEvent ev) { switch (ev.getAction()) { case MotionEvent.ACTION_UP: onTouchActionUp(); break; case MotionEvent.ACTION_MOVE: if (getAdapter().getCount() == 1) { float nowX = ev.getX(); float offset = nowX - preX; preX = nowX; if (offset > SCROLL_WIDTH) {//手指滑动的距离大于设定值 whetherConditionIsRight(offset); } else if (offset < -SCROLL_WIDTH) { whetherConditionIsRight(offset); } else if (!handleDefault) {//这种情况是已经出现缓冲区域了，手指慢慢恢复的情况 if (getLeft() + (int) (offset * RATIO) != mRect.left) { layout(getLeft() + (int) (offset * RATIO), getTop(), getRight() + (int) (offset * RATIO), getBottom()); } } } else if ((currentPosition == 0 || currentPosition == getAdapter().getCount() - 1)) { float nowX = ev.getX(); float offset = nowX - preX; preX = nowX; if (currentPosition == 0) { if (offset > SCROLL_WIDTH) {//手指滑动的距离大于设定值 whetherConditionIsRight(offset); } else if (!handleDefault) {//这种情况是已经出现缓冲区域了，手指慢慢恢复的情况 if (getLeft() + (int) (offset * RATIO) >= mRect.left) { layout(getLeft() + (int) (offset * RATIO), getTop(), getRight() + (int) (offset * RATIO), getBottom()); } } } else { if (offset < -SCROLL_WIDTH) { whetherConditionIsRight(offset); } else if (!handleDefault) { if (getRight() + (int) (offset * RATIO) <= mRect.right) { layout(getLeft() + (int) (offset * RATIO), getTop(), getRight() + (int) (offset * RATIO), getBottom()); } } } } else { handleDefault = true; } if (!handleDefault) { return true; } break; default: break; } return super.onTouchEvent(ev); } private void whetherConditionIsRight(float offset) { if (mRect.isEmpty()) { mRect.set(getLeft(), getTop(), getRight(), getBottom()); } handleDefault = false; layout(getLeft() + (int) (offset * RATIO), getTop(), getRight() + (int) (offset * RATIO), getBottom()); } private void onTouchActionUp() { if (!mRect.isEmpty()) { recoveryPosition(); } } private void recoveryPosition() { TranslateAnimation ta = new TranslateAnimation(getLeft(), mRect.left, 0, 0); ta.setDuration(300); startAnimation(ta); layout(mRect.left, mRect.top, mRect.right, mRect.bottom); mRect.setEmpty(); handleDefault = true; }}
以上所述是小编给大家介绍的Android 实现ViewPager边界回弹效果实例代码，希望对大家有所帮助，如果大家有任何疑问请给我留言，小编会及时回复大家的。在此也非常感谢大家对网站的支持！
生活中若没有朋友，就像生活中没有阳光一样
