安卓作业—Fragment界面跳转

安卓作业利用Fragment实现界面跳转的功能，

1.xml布局代码

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/activity_main"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    android:orientation="vertical"
    android:gravity="center"
    tools:context="cn.edu.niit.fragment.MainActivity">
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="220dp"
        android:orientation="vertical"
        android:layout_weight="1">


        <Button
            android:id="@+id/yf_btn1"
            android:layout_width="250dp"
            android:layout_height="wrap_content"
            android:text="Show Next Page"
            android:layout_gravity="center_horizontal"
            android:layout_marginTop="80dp"
            android:onClick="onClick"/>

    </LinearLayout>

    <LinearLayout
        android:id="@+id/yf_show"
        android:orientation="vertical"
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="1">


    </LinearLayout>

</LinearLayout>

2.第一个fragment布局代码

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/activity_main"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="cn.edu.niit.fragment1.MainActivity">

    <FrameLayout 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"
        tools:context="com.example.wdh.fragmentwork.FirstFragment">

        <TextView
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:gravity="center"
            android:text="This is first fragment!"/>
    </FrameLayout>
</FragmentLayout>

第二个fragment布局代码

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/activity_main"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="cn.edu.niit.fragment2.MainActivity">

    <TextView
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:gravity="center"
            android:text="This is second fragment!"
            android:textSize="25sp" />

    </FrameLayout>

主界面代码如下：public class MainActivity  {

    YiFragment yiFragment;
    ErFragment erFragment;
    FragmentTransaction transaction;
    private Button btshow;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        yiFragment = new YiFragment();
        erFragment = new ErFragment();
        btshow = (Button) findViewById(R.id.btnshow);

        FragmentManager manager = getFragmentManager();
        transaction = manager.beginTransaction();

        yiFragment.setContent("diyigefragment");//修改yiFragment的标题
        transaction.add(R.id.show, yiFragment);
        transaction.commit();//实现Fragment的运行
        btshow.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {

                if (btshow.isClickable()) {
                    FragmentManager manager = getFragmentManager();
                    transaction = manager.beginTransaction();
                    yiFragment = new BiaotiFragment();
                    yiFragment.setContent("diergefragment");
                    transaction.replace(R.id.show, yiFragment);
                    transaction.commit();
                }
                btshow.setOnClickListener(new View.OnClickListener() {
                    @Override
                    public void onClick(View view) {
                        if (btshow.isClickable()) {
                            FragmentManager manager = getFragmentManager();
                            transaction = manager.beginTransaction();
                            contentFragment.setContent("zheshidiergefragment");
                            transaction.replace(R.id.txtshow2, contentFragment);
                            transaction.commit();
                        }
                    }
                });
            }

        });
    }
    问题：如何灵活运用fragment的动态实现和静态实现，跳转界面时也出现了问题。