UI設計

package com.demofragment;
import android.annotation.SuppressLint;
import android.app.Fragment;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;

@SuppressLint("NewApi")
public class Fragment1 extends Fragment {
 
 @Override
 public View onCreateView(LayoutInflater inflater, ViewGroup container,
   Bundle savedInstanceState) {
  // TODO 自動生成的方法存根
  return inflater.inflate(R.layout.fragment1, null);
 }
}

package com.demofragment;
import android.annotation.SuppressLint;
import android.app.Fragment;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;

@SuppressLint("NewApi")
public class Fragment2 extends Fragment {

 @Override
 public View onCreateView(LayoutInflater inflater, ViewGroup container,
   Bundle savedInstanceState) {
  // TODO 自動生成的方法存根
  return inflater.inflate(R.layout.fragment2, null);
 }
}

<?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="#ff0000"
    android:orientation="vertical" >
</LinearLayout>

<?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="#0000ff"
    android:orientation="vertical" >
</LinearLayout>

<LinearLayout 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:orientation="vertical"
    tools:context=".MainActivity"
    android:id="@+id/d">
</LinearLayout>

package com.demofragment;
import android.os.Bundle;
import android.annotation.SuppressLint;
import android.app.Activity;
import android.app.FragmentManager;
import android.app.FragmentTransaction;

public class MainActivity extends Activity {

 @SuppressLint("NewApi") @Override protected void onCreate(Bundle savedInstanceState) {  super.onCreate(savedInstanceState);  setContentView(R.layout.activity_main);    int w=getWindowManager().getDefaultDisplay().getWidth();  int h=getWindowManager().getDefaultDisplay().getHeight();  Fragment1 fragment1=new Fragment1();  Fragment2 fragment2=new Fragment2();    FragmentManager fm=getFragmentManager();  FragmentTransaction ft=fm.beginTransaction();     if(w>h){   ft.replace(android.R.id.content, fragment1);  }else{   ft.replace(android.R.id.content, fragment2);  }  ft.commit(); }}