可以覆写ViewPager的setPrimaryItem方法：
new FragmentStatePagerAdapter(getSupportFragmentManager()) {
...
@Override
public void setPrimaryItem(ViewGroup container, int position, Object object) {
super.setPrimaryItem(container, position, object);
if(object instanceof XXXFragment) {
......
}
}
...
}
new FragmentStatePagerAdapter(getSupportFragmentManager()) {
...
@Override
public void setPrimaryItem(ViewGroup container, int position, Object object) {
super.setPrimaryItem(container, position, object);
if(object instanceof XXXFragment) {
......
}
}
...
}
new FragmentStatePagerAdapter(getSupportFragmentManager()) {
...
@Override
public void setPrimaryItem(ViewGroup container, int position, Object object) {
super.setPrimaryItem(container, position, object);
if(object instanceof XXXFragment) {
......
}
}
...
}