Android 活动启动导航不工作

我有一个活动，应该能够导航到它的父级。我是这样在清单中声明的：

 <activity
        android:name="com.myapp.SeminarActivity"
        android:label="@string/app_name"
        android:launchMode="singleTop"
        android:theme="@style/Theme.AppCompat.Light" 
        android:parentActivityName="com.myapp.SeminarOverviewActivity">

        <!-- Parent activity meta-data to support 4.0 and lower -->
        <meta-data
            android:name="android.support.PARENT_ACTIVITY"
            android:value="com.myapp.SeminarOverviewActivity" />

    </activity>

---

但没有效果。在我的测试中，总是使用上面截取的其他部分。

我不明白问题是什么？你在后退吗？您是否希望通过这样做来访问父活动？我在ActionBar左角按back。我想转到我在Manifest SeminarOverviewActivity中声明的活动，即使实际的活动不是从它开始的。

public boolean onOptionsItemSelected(MenuItem item) {
    switch (item.getItemId()) {
    // Respond to the action bar's Up/Home button
    case android.R.id.home:
         Intent upIntent = NavUtils.getParentActivityIntent(this);
         if (NavUtils.shouldUpRecreateTask(this, upIntent)) {
             // This activity is NOT part of this app's task, so create a new task
             // when navigating up, with a synthesized back stack.
             TaskStackBuilder.create(this)
                     // Add all of this activity's parents to the back stack
                     .addNextIntentWithParentStack(upIntent)
                     // Navigate up to the closest parent
                     .startActivities();
         } else {
             // This activity is part of this app's task, so simply
             // navigate up to the logical parent activity.
             NavUtils.navigateUpTo(this, upIntent);
         }

    }
    return super.onOptionsItemSelected(item);
}