重复的id，标记为null

Question

我试图做同样的片段，但我有这个错误。我该怎么做才能解决这个错误？

Caused by: java.lang.IllegalArgumentException: Binary XML file line #117: Duplicate id 0x7f080072, tag null, or parent id 0x0 with another fragment for com.google.android.gms.maps.SupportMapFragment
            at android.support.v4.app.FragmentActivity.onCreateView(FragmentActivity.java:296)

我看到有相同问题的帖子：Duplicate ID, tag null, or parent id with another fragment for com.google.android.gms.maps.MapFragment和duplicated id with fragment，但他们没有帮助我。

修改

一些代码

for (Task task : tasks.getTaskList()) {
        Fragment targetFragment = TargetFragment.getInstance(task);
        fragmentList.add(targetFragment);
    }

   viewPager.setAdapter(new TargetAdapter(context.getSupportFragmentManager(),
                                fragmentList));
   pageIndicator.setViewPager(viewPager);