碎片1

视图

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical"
    android:background="#00FF00" >
    
	<TextView 
	    android:id="@+id/lblFragment1"
	    android:layout_width="fill_parent"
	    android:layout_height="wrap_content"
	    android:text="This is fragment #1"
	    android:textColor="#000000"
	    android:textSize="25sp"/>
</LinearLayout>

代码

package com.example.androidtest;

import android.app.Activity;
import android.app.Fragment;
import android.os.Bundle;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;

public class Fragment1 extends Fragment{
	@Override
	public View onCreateView(LayoutInflater inflater,
						ViewGroup container,
						Bundle savedInstanceState)
	{
		Log.d("Fragment1", "onCreateView");
		return inflater.inflate(R.layout.fragment1, container, false);
	}
	
	@Override
	public void onAttach(Activity activity)
	{
		super.onAttach(activity);
		Log.d("Fragment1", "onAttach");
	}
	
	@Override
	public void onCreate(Bundle savedInstanceState)
	{
		super.onCreate(savedInstanceState);
		Log.d("Fragment1", "onCreate");
	}
	
	@Override
	public void onActivityCreated(Bundle savedInstanceState)
	{
		super.onActivityCreated(savedInstanceState);
		Log.d("Fragment1", "onActivityCreated");
	}
	
	@Override
	public void onStart()
	{
		super.onStart();
		Log.d("Fragment1", "onStart");
	}
	
	@Override
	public void onResume()
	{
		super.onResume();
		Log.d("Fragment1", "onResume");
	}
	
	@Override
	public void onPause()
	{
		super.onPause();
		Log.d("Fragment1", "onPause");
	}
	
	@Override
	public void onStop()
	{
		super.onStop();
		Log.d("Fragment1", "onStop");
	}
	
	@Override
	public void onDestroyView()
	{
		super.onDestroyView();
		Log.d("Fragment1", "onDestroyView");
	}
	
	@Override
	public void onDetach()
	{
		super.onDetach();
		Log.d("Fragment1", "onDetach");
	}
}

碎片2

视图

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical"
    android:background="#FFFE00" >
    
	<TextView 
	    android:layout_width="fill_parent"
	    android:layout_height="wrap_content"
	    android:text="This is fragment #2"
	    android:textColor="#000000"
	    android:textSize="25sp"/>
	
	<Button
	    android:id="@+id/btnGetText" 
	    android:layout_width="wrap_content"
	    android:layout_height="wrap_content"
	    android:text="Get text in Fragment #1"
	    android:textColor="#000000"
	    android:onClick="onClick"/>
</LinearLayout>

代码

package com.example.androidtest;

import android.app.Fragment;
import android.os.Bundle;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;

public class Fragment2 extends Fragment {
	@Override
	public View onCreateView(LayoutInflater inflater,
						ViewGroup container,
						Bundle savedInstanceState)
	{
		return inflater.inflate(R.layout.fragment2, container, false);
	}
	
	@Override
	public void onStart()
	{
		super.onStart();
		//getActivity() 返回与当前碎片关联的活动
		Button btnGetText = (Button) getActivity().findViewById(R.id.btnGetText);
		btnGetText.setOnClickListener(new View.OnClickListener() {
			
			@Override
			public void onClick(View v) {
				TextView lbl = (TextView) getActivity().findViewById(R.id.lblFragment1);
				Toast.makeText(getActivity(), lbl.getText(), Toast.LENGTH_SHORT).show();
			}
		});
	}
}

活动

视图

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="horizontal"
    tools:context="${relativePackage}.${activityClass}" >

    <fragment
        android:name="com.example.androidtest.Fragment1"
        android:id="@+id/fragment1"
        android:layout_weight="1"
        android:layout_width="0px"
        android:layout_height="match_parent" />
    
     <fragment
        android:name="com.example.androidtest.Fragment2"
        android:id="@+id/fragment2"
        android:layout_weight="1"
        android:layout_width="0px"
        android:layout_height="match_parent" />

</LinearLayout>

代码

package com.example.androidtest;

import android.app.Activity;
import android.app.FragmentManager;
import android.app.FragmentTransaction;
import android.os.Bundle;
import android.view.Display;
import android.view.WindowManager;

public class FragmentsActivity extends Activity {

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_fragments);
		/*
		FragmentManager fragmentManager = getFragmentManager();
		FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
		
		WindowManager wm = getWindowManager();
		Display d = wm.getDefaultDisplay();
		if(d.getWidth() > d.getHeight()){//landscape mode
			Fragment1 fragment1 = new Fragment1();
			//android.R.id.content活动的内容视图
			fragmentTransaction.replace(android.R.id.content, fragment1);
		}else{//portrait mode
			Fragment2 fragment2 = new Fragment2();
			fragmentTransaction.replace(android.R.id.content, fragment2);
		}
		//这段代码确保了当把碎片添加到活动中后，用户可以单击Back按钮移除它。
		fragmentTransaction.addToBackStack(null);
		
		fragmentTransaction.commit();*/
	}
}

运行效果