ViewPager java.lang.IndexOutOfBoundsException: Invalid index 0, size is 0

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使用ViewPager在滑动的时候出现如下异常：

java.lang.IndexOutOfBoundsException: Invalid index 0, size is 0    at java.util.ArrayList.throwIndexOutOfBoundsException(ArrayList.java:255)    at java.util.ArrayList.get(ArrayList.java:308)    at android.support.v4.view.ViewPager.performDrag(ViewPager.java:2241)    at android.support.v4.view.ViewPager.onTouchEvent(ViewPager.java:2158)    ......

可通过自定义ViewPager来解决，带码如下：

public class CustomViewPager extends ViewPager {    public boolean enabled = true;    public CustomViewPager(Context context) {        super(context);    }    public CustomViewPager(Context context, AttributeSet attrs) {        super(context, attrs);    }    @Override    public boolean onTouchEvent(MotionEvent ev) {        if(this.enabled) {            if (getCurrentItem() == 0 && getChildCount() == 0) {                return false;            }            return super.onTouchEvent(ev);        } else {            return false;        }    }    @Override    public boolean onInterceptTouchEvent(MotionEvent ev) {        if(this.enabled) {            if (getCurrentItem() == 0 && getChildCount() == 0) {                return false;            }            return super.onInterceptTouchEvent(ev);        } else {            return false;        }    }}

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