Fragments中的OnClickListener不起作用

Question

我有一个名为Frags的MainActivity和Fragment，它本身有一个名为CardFrontFragment的片段。

我在这个片段（子片段）上注册一个OnClickListener，在这个OnClickListener的OnClick方法中，我用CardbackFragment片段替换这个片段（CardFrontFragment）。我也在这个片段（CardbackFragment）上注册一个OnClickListener，以便在这个片段和子片段之间再次切换。

OnClickListener在第一个片段（CardfrontFragment）工作，第二个片段显示但现在通过点击第二个片段没有任何反应，OnClickListener不能与第二个片段一起工作，这是杀了我，请帮助我！

代码：

MainActivity.java

public class MainActivity extends ActionBarActivity {
    public static Frags frag=new Frags();
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        if (savedInstanceState == null) {
            getSupportFragmentManager().beginTransaction()
                    .add(R.id.container, frag)
                    .commit();
        }
    }
}

Frags.java

public class Frags extends Fragment{

    CardBackFragment back=new CardBackFragment();
    CardFrontFragment front=new CardFrontFragment(); 

     View view;

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
            Bundle savedInstanceState) {

        View view;
         view=inflater.inflate(R.layout.frag_layout, container, false);





                  getChildFragmentManager().beginTransaction()
                    .add(R.id.frag_container, back)
                    .commit();

                  return view;
    }


    public void Onflip(boolean iSback)
    {
        if(iSback)
        {
        getChildFragmentManager().beginTransaction()
        .setCustomAnimations(
              R.animator.card_flip_right_in, R.animator.card_flip_right_out,
               R.animator.card_flip_right_in, R.animator.card_flip_right_out)
               .replace(R.id.frag_container, front)
        .commit();
        }
        else
        {
            getChildFragmentManager().beginTransaction()
            .setCustomAnimations(
                  R.animator.card_flip_right_in, R.animator.card_flip_right_out,
                   R.animator.card_flip_right_in, R.animator.card_flip_right_out)
                   .replace(R.id.frag_container, back)
            .commit();

        }

    }


}

CardFrontFragment

public class CardFrontFragment extends Fragment {
    public CardFrontFragment() {
    }

    View view;
    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
            Bundle savedInstanceState) {
         view=inflater.inflate(R.layout.fragment_card_front, container, false);

         view.setOnClickListener(new OnClickListener(){

            @Override
            public void onClick(View arg0) {


                MainActivity.frag.Onflip(false);

                Log.i("front","onclick");
            }




         });


         return view;
    }

}

CardBackFragment

public class CardBackFragment extends Fragment {
    public CardBackFragment() {
    }

    View view;
    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
            Bundle savedInstanceState) {
         view=inflater.inflate(R.layout.fragment_card_back, container, false);

         view.setOnClickListener(new OnClickListener(){

            @Override
            public void onClick(View arg0) {


                MainActivity.frag.Onflip(false);

                Log.i("back","onclick");
            }




         });


         return view;
    }

}

XML：

fragment_card_front.xml

  <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
      android:orientation="vertical" 
      android:layout_width="fill_parent"
      android:layout_height="fill_parent"
      android:background="#0000ff" >

      <Button
          android:id="@+id/front_button"
          android:layout_width="wrap_content"
          android:layout_height="wrap_content"
          android:text="Button" />

</LinearLayout>

fragment_card_back.xml

  <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
      android:orientation="vertical" 
      android:layout_width="fill_parent"
      android:layout_height="fill_parent"
      android:background="#000000" >

      <Button
          android:id="@+id/back_button"
          android:layout_width="wrap_content"
          android:layout_height="wrap_content"
          android:text="Button" />

</LinearLayout>

frag_layout.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" 
    android:id="@+id/frag_container">


</LinearLayout>

activity_main.xml中

<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/container"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="com.example.demokhar.MainActivity"
    tools:ignore="MergeRootFrame" />