问题描述

隐藏和显示 Fragment 时显示错误的 fragment

第一次我把程序中的fragments的可见性改变了， fragment显示的不是我设置的。
My layout:

    <LinearLayout xmlns:android=""http://schemas.android.com/apk/res/android""        xmlns:tools=""http://schemas.android.com/tools""        android:layout_width=""match_parent""        android:layout_height=""match_parent""        android:orientation=""vertical""        tools:context="".MainActivity"" >    <fragment        android:id=""@+id/act_main_frag_top_bar""        class=""br.com.myapp.fragments.TopBarFragment""        android:layout_height=""wrap_content""        android:layout_width=""match_parent""/>    <fragment        android:id=""@+id/act_main_frag_toolbar""        class=""br.com.myapp.fragments.ToolbarFragment""        android:layout_height=""wrap_content""        android:layout_width=""match_parent""/>    <!-- Tabs -->        <fragment        android:id=""@+id/act_main_frag_twitter""        class=""br.com.myapp.fragments.TwitterFragment""        android:layout_height=""match_parent""        android:layout_width=""match_parent""        android:visibility=""gone""/>    <fragment        android:id=""@+id/act_main_frag_facebook""        class=""br.com.myapp.fragments.FacebookFragment""        android:layout_height=""match_parent""        android:layout_width=""match_parent""        android:visibility=""gone""/>    <fragment        android:id=""@+id/act_main_frag_tv_show""        class=""br.com.myapp.fragments.TVShowFragment""        android:layout_height=""match_parent""        android:layout_width=""match_parent""        android:visibility=""gone""/>    <fragment        android:id=""@+id/act_main_frag_info""        class=""br.com.bluepen.mixtv.fragments.InfoFragment""        android:layout_height=""match_parent""        android:layout_width=""match_parent""        android:visibility=""gone""/>   </LinearLayout>

myActivity:

@Overrideprotected void onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    setContentView(R.layout.activity_main);    FragmentManager manager = getSupportFragmentManager();    mStreamingFrag = (StreamingFragment) manager.findFragmentById(R.id.act_main_frag_streaming);    mFacebookFrag = (FacebookFragment) manager.findFragmentById(R.id.act_main_frag_facebook);    mTwitterFrag = (TwitterFragment) manager.findFragmentById(R.id.act_main_frag_twitter);    mTVShowFrag = (TVShowFragment) manager.findFragmentById(R.id.act_main_frag_tv_show);    mInfoFrag = (InfoFragment) manager.findFragmentById(R.id.act_main_frag_info);    mToolbar = (ToolbarFragment) manager.findFragmentById(R.id.act_main_frag_toolbar);    mToolbar.setListener(this);    FragmentTransaction transaction = getSupportFragmentManager().beginTransaction();    transaction.show(mStreamingFrag);    transaction.commit();}

在onCreate方法执行后，fragment显示的是 TwitterFragment，而不是我在onCreate方法的最后设置的StreamingFragment 。