微信切换界面延时加载的实现方法是优化ViewPager中加载Fragment

用fragment中的setUserVisibleHint这个方法即可。

private boolean hasLoadedOnce = false;   //your boolean field

@Override

public void setUserVisibleHint(booleanisVisibleToUser) {

super.setUserVisibleHint(isVisibleToUser);

if (this.isVisible()) {

// we check that the fragment is becomingvisible

if (isVisibleToUser &&!hasLoadedOnce) {

//do something

}

}

}

}