全局回调

注册回调

FragmentLifecycleManager.registerFragmentShowCallbacks(new FragmentLifecycleManager.FragmentShowLifecycleCallbacks() {
    @Override
    public void onResumeShowed(Fragment f, boolean lifecycle) {
        //lifecycle：这次回调是否来自生命周期
        Log.d("---->", "显示在最前");
    }

    @Override
    public void onPauseShowed(Fragment f, boolean lifecycle) {
        Log.d("---->", "处于不显示");
    }
});

注销回调

@Override
protected void onDestroy() {
    super.onDestroy();
    FragmentLifecycleManager.unregisterFragmentShowCallbacks();
}

ViewPager + Fragment

Fragment

viewpager.setAdapter后注册回调

FragmentPageManager.registerFragmentShowLifecycle(getSupportFragmentManager(), viewpager);

嵌套Fragment

如果是ViewPager+Fragment，Fragment里还有ViewPager+Fragment，先Activity中的viewpager.setAdapter后注册回调

FragmentHelper.registerChildFragmentLifecycle(NestingFragment.this, viewPager);

再在Fragment中手动回调子Fragment

@Override
public void onResumeShow(boolean lifecycle) {
    FragmentPageManager.notifyCurrentResumeShow(viewPager);
}

@Override
public void onPauseShow(boolean lifecycle) {
    FragmentPageManager.notifyCurrentResumeShow(viewPager);
}

回调

在Fragment实现FragmentLifecycle，即会回调onResumeShow和onPauseShow

@Override
public void onResumeShow(boolean lifecycle) {
    Log.d("---->", "显示在最前");
}

@Override
public void onPauseShow(boolean lifecycle) {
    //lifecycle：这次回调是否来自生命周期
    Log.d("---->", "处于不显示");
}