解决SwipeRefreshLayout和webview下拉刷新冲突问题

在SwipeRefreshLayout中嵌套webview时，默认无论在网页任何位置下拉都会触发刷新，实际需求是只在顶部需要，解决方法是继承SwipeRefreshLayout,复写其中的canScrollUp方法：

import android.content.Context;
import android.support.v4.widget.SwipeRefreshLayout;
import android.util.AttributeSet;
import android.view.ViewGroup;

public class ScrollSwipeRefreshLayout extends SwipeRefreshLayout {
// 子布局 这里为webview
private ViewGroup mChildViewGroup;

public ScrollSwipeRefreshLayout(Context context) {
super(context);
}
public ScrollSwipeRefreshLayout(Context context, AttributeSet attrs) {
super(context, attrs);
}
public ViewGroup getViewGroup() {
return mChildViewGroup;
}
public void setViewGroup(ViewGroup viewGroup) {
mChildViewGroup = viewGroup;
}

/**
* @return Whether it is possible for the child view of this layout to
*         scroll up. Override this if the child view is a custom view.
*/
@Override
public boolean canChildScrollUp() {
if (null != mChildViewGroup) {
if (mChildViewGroup.getScrollY() > 0) {
return true;
}
return false;
}
return super.canChildScrollUp();
}
}

然后在使用时传入webview即可：

mRefreshLayout.setViewGroup(webView);