Android：不能用另一个replace一个片段
我需要用另一个Fragmentreplace一个Activity中的一个Fragment ，下面是Activity的图层文件：
<?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>
所以默认情况下是FragA ，现在我想用FragBreplace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); }
但是我得到了exception：
>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): at android.view.ViewGroup.addViewInner(ViewGroup.java:1857) 05-06 16:24:40.692: ERROR/AndroidRuntime(9194): at android.view.ViewGroup.addView(ViewGroup.java:1752) 05-06 16:24:40.692: ERROR/AndroidRuntime(9194): at android.view.ViewGroup.addView(ViewGroup.java:1709) 05-06 16:24:40.692: ERROR/AndroidRuntime(9194): at android.view.ViewGroup.addView(ViewGroup.java:1689) 05-06 16:24:40.692: ERROR/AndroidRuntime(9194): at android.support.v4.app.NoSaveStateFrameLayout.wrap(NoSaveStateFrameLayout.java:40) 05-06 16:24:40.692: ERROR/AndroidRuntime(9194): at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:743) 05-06 16:24:40.692: ERROR/AndroidRuntime(9194): at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:933) 05-06 16:24:40.692: ERROR/AndroidRuntime(9194): at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:578) 05-06 16:24:40.692: ERROR/AndroidRuntime(9194): at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1219) 05-06 16:24:40.692: ERROR/AndroidRuntime(9194): at android.support.v4.app.FragmentManagerImpl$1.run(FragmentManager.java:380) 05-06 16:24:40.692: ERROR/AndroidRuntime(9194): at android.os.Handler.handleCallback(Handler.java:587) 05-06 16:24:40.692: ERROR/AndroidRuntime(9194): at android.os.Handler.dispatchMessage(Handler.java:92) 05-06 16:24:40.692: ERROR/AndroidRuntime(9194): at android.os.Looper.loop(Looper.java:123) 05-06 16:24:40.692: ERROR/AndroidRuntime(9194): at android.app.ActivityThread.main(ActivityThread.java:4363) 05-06 16:24:40.692: ERROR/AndroidRuntime(9194): at java.lang.reflect.Method.invokeNative(Native Method) 05-06 16:24:40.692: ERROR/AndroidRuntime(9194): at java.lang.reflect.Method.invoke(Method.java:521) 05-06 16:24:40.692: ERROR/AndroidRuntime(9194): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:860) 05-06 16:24:40.692: ERROR/AndroidRuntime(9194): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618) 05-06 16:24:40.692: ERROR/AndroidRuntime(9194): at dalvik.system.NativeStart.main(Native Method)
我能做什么？
谢谢！
您不能replace布局文件中静态定义的片段。 您只能通过FragmentTransactionreplace您dynamic添加的FragmentTransaction 。
尝试在ft的末尾commit() ，你需要commit()你的修改让它知道。
将一个片段replace为另一个片段，并将之前的状态保留在后退堆栈中：
//创build新的片段和事务
Fragment newFragment = new ExampleFragment(); FragmentTransaction transaction = getFragmentManager().beginTransaction(); // Replace whatever is in the fragment_container view with this fragment, // and add the transaction to the back stack transaction.replace(R.id.fragment_container, newFragment); transaction.addToBackStack(null); // Commit the transaction transaction.commit();
