1、重写viewpager 对事件分发进行拦截，主要拦截横向滑动

 

/**

* 嵌套在scrollerview中时计算固定高度

* Created by shenshilei on 2017/5/10.

*/

public class ScViewPager extends ViewPager {

private float xDistance, yDistance, xLast, yLast;

public ScViewPager(Context context) {

super(context);

}

public ScViewPager(Context context, AttributeSet attrs) {

super(context, attrs);

}

/**

* 事件分发，判断是否是左右滑动并且右侧有没有子项

* @param ev

* @return

*/

@Override

public boolean onInterceptTouchEvent(MotionEvent ev) {

switch (ev.getAction()) {

case MotionEvent.ACTION_DOWN:

xDistance = yDistance = 0f;

xLast = ev.getX();

yLast = ev.getY();

break;

case MotionEvent.ACTION_MOVE:

final float curX = ev.getX();

final float curY = ev.getY();

xDistance += Math.abs(curX - xLast);

yDistance += Math.abs(curY - yLast);

xLast = curX;

yLast = curY;

Log.e("Client",xDistance+"移动"+yDistance);

if (xDistance > yDistance &&(getCurrentItem()>0||getCurrentItem()<getChildCount()-1)) {

Log.e("Client","右侧还有");

return true;

}else if(yDistance>xDistance){

getParent().requestDisallowInterceptTouchEvent(false);

}

// else if (xDistance > yDistance &&(getCurrentItem()==getChildCount()-1)){

// Log.e("Client","右侧没有");

// return false;

// }else{

// getParent().requestDisallowInterceptTouchEvent(false);

// Log.e("Client","其他");

// return true;

// }

}

return super.onInterceptTouchEvent(ev);

}

@Override

protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {

int viewHeight = 0;

View childView = getChildAt(getCurrentItem());

if(childView != null){

childView.measure(widthMeasureSpec,

MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED));

viewHeight = childView.getMeasuredHeight();

heightMeasureSpec = MeasureSpec.makeMeasureSpec(viewHeight,

MeasureSpec.EXACTLY );

}

super.onMeasure(widthMeasureSpec, heightMeasureSpec);

}

2、第二步重写scrollerview 主要是对纵向滑动事件进行拦截

/**

* 解决嵌套viewpager时事件冲突的问题

* Created by shenshilei on 2017/5/10.

*/

public class VpScrollView extends ScrollView {

private float xDistance, yDistance, xLast, yLast;

public VpScrollView(Context context) {

super(context);

}

public VpScrollView(Context context, AttributeSet attrs) {

super(context, attrs);

}

public VpScrollView(Context context, AttributeSet attrs, int defStyle) {

super(context, attrs, defStyle);

}

@Override

public boolean onInterceptTouchEvent(MotionEvent ev) {

switch (ev.getAction()) {

case MotionEvent.ACTION_DOWN:

xDistance = yDistance = 0f;

xLast = ev.getX();

yLast = ev.getY();

break;

case MotionEvent.ACTION_MOVE:

final float curX = ev.getX();

final float curY = ev.getY();

xDistance += Math.abs(curX - xLast);

yDistance += Math.abs(curY - yLast);

xLast = curX;

yLast = curY;

Log.e("Client", "scollerview ："+xDistance + "移动" + yDistance);

if (xDistance > yDistance) {

return false;

}

}

return super.onInterceptTouchEvent(ev);

}

@Override

protected int computeScrollDeltaToGetChildRectOnScreen(Rect rect) {

return 0;

}

}