Android:无法将一个片段替换为另一个

我需要将一个Activity中的Fragment替换为另一个Fragment,以下是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>

所以默认情况下有FragA,现在我想在活动中将其替换为FragB,我这样做了:

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

但是我有一个例外:

>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):     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!

hzxu asked 2020-07-07T22:00:54Z
4个解决方案
117 votes

您不能替换在布局文件中静态定义的片段。 您只能替换通过FragmentTransaction动态添加的片段。

CommonsWare answered 2020-07-07T22:01:19Z
4 votes

尝试在ft结束时尝试commit(),您需要commit()进行更改以告知您。

sumakira answered 2020-07-07T22:01:39Z
0 votes

将一个片段替换为另一个片段,并在后堆栈中保留先前的状态:

    // Create new fragment and transaction

    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();
Vijay Kumar M answered 2020-07-07T22:01:59Z
0 votes
getFragmentManger()
  .beginTransaction
  .replace(R.id.frame,Yourfragment.newInstance(),null)
  .addtobackstack
  .commit();

人们总是说我是一线客,所以这里有适合您的一线客解决方案

raj kavadia answered 2020-07-07T22:02:19Z
translate from https://stackoverflow.com:/questions/5907673/android-cant-replace-one-fragment-with-another