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。