动态创建fragment

MainActivity

public class MainActivity extends Activity {

 

 @Override

 protected void onCreate(Bundle savedInstanceState) {

  super.onCreate(savedInstanceState);

  setContentView(R.layout.activity_main);

  int width = getWindowManager().getDefaultDisplay().getWidth();

  int length = getWindowManager().getDefaultDisplay().getHeight();

 

  FragmentManager fm = getFragmentManager();

  FragmentTransaction ft = fm.beginTransaction();

 

  if (width > length) {

   ft.replace(android.R.id.content, new Fragment1());

  } else {

   ft.replace(android.R.id.content, new Fragment2());

  }

  ft.commit();

 }

 

}

 

定义两个Fragment

public class Fragment1 extends Fragment{

 @Override

 public View onCreateView(LayoutInflater inflater, ViewGroup container,

   Bundle savedInstanceState) {

  return inflater.inflate(R.layout.fragment1, null);

 }

}

public class Fragment2 extends Fragment{

 @Override

 public View onCreateView(LayoutInflater inflater, ViewGroup container,

   Bundle savedInstanceState) {

  return inflater.inflate(R.layout.fragment2, null);

 }

}

 

布局文件

activity_main

<RelativeLayout 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: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=".MainActivity" >

 

   

 

</RelativeLayout>

 

fragment1

<?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:background="#aa0000ff"

    android:orientation="vertical" >

 

</LinearLayout>

fragment2

<?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:background="#00ff00"

    android:orientation="vertical" >

 

</LinearLayout>