小编Rac*_*ace的帖子

我有一个项目,它有一个MainActivity,它托管一个片段,通过Viewpager托管另外两个片段.它在第一次启动时看起来很好,但是当我旋转时,Viewpager中的两个碎片都会丢失.我已经尝试将getFragmentManager更改为getChildFragmentManager但是我会得到一个非法状态异常:无法保留嵌套在其他片段中的fragements.

MainActivity.java:

import android.app.ActionBar;
import android.os.Bundle;
import android.view.MenuItem;
import android.widget.ArrayAdapter;
import android.widget.ListView;

import com.jeremyfeinstein.slidingmenu.lib.SlidingMenu;
import com.jeremyfeinstein.slidingmenu.lib.app.SlidingFragmentActivity;

public class MainActivity extends SlidingFragmentActivity {
@TargetApi(11)
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    setContentView(R.layout.activity_main);
    getSupportFragmentManager()
    .beginTransaction()
    .replace(R.id.mainContentFrame, new WorkOutsContainerFrag())
    .commit();


     setBehindContentView(R.layout.menu);

     ActionBar actionBar = getActionBar();

        populate();

       SlidingMenu menu = getSlidingMenu();

        menu.setMode(SlidingMenu.LEFT);
        menu.setShadowWidthRes(R.dimen.shadow_width);
        menu.setShadowDrawable(R.drawable.shadow);
        menu.setBehindWidthRes(R.dimen.slidingmenu_offset);
        menu.setFadeDegree(0.35f);
        menu.setTouchModeAbove(SlidingMenu.TOUCHMODE_FULLSCREEN);
        menu.setSlidingEnabled(false);
        setSlidingActionBarEnabled(true);

        actionBar.setDisplayHomeAsUpEnabled(true);



    }


    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        switch (item.getItemId()) {
        case android.R.id.home:
            toggle();
            return true;
        default:
            return super.onOptionsItemSelected(item);
        }
    }

    private void populate() { …