Fragment实现界面跳转的效果

<?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:orientation="vertical"
    tools:context="com.example.zhoushasha.myapplication.MainActivity">

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

    </LinearLayout>
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:orientation="vertical"
        android:layout_weight="1">
        <Button
            android:id="@+id/next"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="center"
            android:text="no way"
            android:onClick="onClick"/>





    </LinearLayout>

</LinearLayout>

fragment界面的布局

<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="layout.yesFragment">

    <!-- TODO: Update blank fragment layout -->
    <TextView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:gravity="center"
        android:text="all roads to china"
        android:textSize="30dp"/>
</FrameLayout>

部分Java实现代码

  @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        FirstFragment firstFragment= new FirstFragment();

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

        firstFragment = new FirstFragment();
        transaction.add(R.id.next, firstFragment);
        transaction.commit();

    }


    public void onClick(View view) {
        if (view.getId() == R.id.next) {
            tc = true;
            if (qh) {
                FragmentManager manager = getFragmentManager();
                FragmentTransaction transaction = manager.beginTransaction();
                if (secondFragment == null) {
                    secondFragment   secondFragment= new secondFragment();
                    transaction.replace(R.id.next, secondFragment);
                    transaction.commit();
                    qh = false;
                } else {
                    transaction.replace(R.id.next, secondFragment);
                    transaction.commit();
                    qh = false;
                }
            } else {
                Toast.makeText(this, "This is second fragment", Toast.LENGTH_SHORT).show();
            }

        }
    }

    public boolean onKeyDown(int keyCode, KeyEvent event) {

        if (event.getKeyCode() == KeyEvent.KEYCODE_BACK && tc) {

            FragmentManager manager = getFragmentManager();
            FragmentTransaction transaction = manager.beginTransaction();
            FirstFragment firstFragment=new FirstFragment();
            qh = true;
            tc = false;
            transaction.replace(R.id.next, firstFragment);
            transaction.commit();
            return false;
        } else {
            finish();
        }
        return super.onKeyDown(keyCode, event);


    }

}