相关疑难解决方法(0)

我正在尝试学习如何Fragment在android中使用s.当我在Android中调用fragmentnew时,我正试图删除旧的fragment.

我需要替换Fragment一个Activity与另一个Fragment,下面是层文件Activity:

<?xml version="1.0" encoding="utf-8"?>

<FrameLayout
  xmlns:android="http://schemas.android.com/apk/res/android"
  android:layout_width="fill_parent"
  android:layout_height="fill_parent"
  android:id="@+id/home_layout_container">

    <fragment android:name="com.foo.FragA"
        android:id="@+id/home_list"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent" />

    </FrameLayout>

所以默认情况下有FragA,现在我想在活动中用FragB替换它,我做了:

public void onRegionClicked(Region region) {
    RegionInfoFragment rif = RegionInfoFragment.newInstance(region);
    FragmentTransaction ft = getSupportFragmentManager().beginTransaction();
    ft.replace(R.id.home_list, rif);
}

但我得到了例外:

>6:24:40.685: ERROR/AndroidRuntime(9194): Uncaught handler: thread main exiting due to uncaught exception
05-06 16:24:40.692: ERROR/AndroidRuntime(9194): java.lang.IllegalStateException: The specified child already has a parent. You must call removeView() on the child's parent first.
05-06 16:24:40.692: ERROR/AndroidRuntime(9194): …