这个方法确实简单暴力 该BUG在support-v4 24.0.0+以上 官方已修复
原文：http://www.jianshu.com/p/c12a98a36b2b
// 保存
@Override
protected void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
getSupportFragmentManager().putFragment(outState, KEY, targetFragment);
}
// 恢复
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_scrolling);
if (savedInstanceState != null) {
Fragment targetFragment = getSupportFragmentManager().getFragment(savedInstanceState, KEY);
}
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