如何保存片段的狀態

Question

我有多個要保存的數據片段，並且可以從不同的片段訪問。

如果我只想保存特定片段的狀態，該如何保存？

這是我目前的導航方式：

片段“ 1”

  case R.id.imageButton1:

            Fragment fragment2;
            fragment2 = new Frag2();
            //fragment2.setArguments(args);
            FragmentManager frgManager = getFragmentManager();
        //  frgManager.putFragment(bundle, key, fragment)
            frgManager.beginTransaction().replace(R.id.content_frame, fragment2)
                    .commit();      

            break;  

片段“ 2”

switch(v.getId()){


case R.id.imageButton2:
    Fragment fragment;
    fragment = new Frag1();
    fragment.setArguments(fragment.getArguments());
    android.app.FragmentManager frgManager = getFragmentManager();
    frgManager.beginTransaction().replace(R.id.content_frame, fragment)
            .commit();  
    break;

case R.id.imageButton1:     
    fragment = new  LifeFrag3();
    android.app.FragmentManager frgManage = getFragmentManager();
    frgManage.beginTransaction().replace(R.id.content_frame, fragment)
            .commit();
    break;

我也嘗試過通過將值存儲在哈希圖中來傳遞數據，然后在暫停和恢復上使用以傳遞密鑰，但是我沒有運氣。 ：/

Answer 1

@Override
public void onCreate(Bundle savedInstanceState) {
    ...
    if (savedInstanceState != null) {
        mContent = getSupportFragmentManager().getFragment(
                    savedInstanceState, "mContent");
    }
}

@Override
protected void onSaveInstanceState(Bundle outState) {
    super.onSaveInstanceState(outState);
getSupportFragmentManager().putFragment(outState, "mContent", mContent); 
}