android与fragment交互，fragment显示unity3d视图。

/**
 * 主界面
 * @author gavin
 *
 */
public class MainActivity extends FragmentActivity implements OnClickListener {

	private Button btn1;
	private Button btn2;
	private FragmentManager fm;
	View playerView;
	private Fragment currentFragment;
	private U3dFragment u3dFragment = new U3dFragment();
	private MenuOneFragment menuOneFragment = new MenuOneFragment();
	private MenuTwoFragment menuTwoFragment = new MenuTwoFragment();
	
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		// TODO Auto-generated method stub
		super.onCreate(savedInstanceState);
		Constants.mUnityPlayer = new UnityPlayer(this);
		int glesMode = Constants.mUnityPlayer.getSettings().getInt("gles_mode", 1);
		boolean trueColor8888 = false;
		Constants.mUnityPlayer.init(glesMode, trueColor8888);
		
		fm = getSupportFragmentManager();
		
		setContentView(R.layout.activity_main);
		initView();
		currentFragment = u3dFragment;
		changeFragment(currentFragment);
		
	}
	
	/**
	 * 初始化控件
	 */
	private void initView(){
		btn1 = (Button) findViewById(R.id.btn1);
		btn2 = (Button) findViewById(R.id.btn2);
		btn1.setOnClickListener(this);
		btn2.setOnClickListener(this);
	}
	
	@Override
	public void onClick(View v) {
		// TODO Auto-generated method stub
		switch(v.getId()){
			case R.id.btn1:
				Toast.makeText(MainActivity.this, "btn1", Toast.LENGTH_SHORT).show();
				if(currentFragment instanceof U3dFragment || currentFragment instanceof MenuTwoFragment){
					currentFragment = menuOneFragment;
					changeFragment(currentFragment);
				}else{
					currentFragment = u3dFragment;
					changeFragment(currentFragment);
				}
				break;
			case R.id.btn2:
				Toast.makeText(MainActivity.this, "btn2", Toast.LENGTH_SHORT).show();
				if(currentFragment instanceof U3dFragment || currentFragment instanceof MenuOneFragment){
					currentFragment = menuTwoFragment;
					changeFragment(currentFragment);
				}else{
					currentFragment = u3dFragment;
					changeFragment(currentFragment);
				}
				break;
		}
	}
	
	/**
	 * 方法用来改变界面
	 */
	private void changeFragment(Fragment fragment){
		FragmentTransaction ft = fm.beginTransaction();
		ft.replace(R.id.content, fragment);
		ft.commit();
	}
	
	protected void onDestroy ()
	{
		Constants.mUnityPlayer.quit();
		super.onDestroy();
	}

	// onPause()/onResume() must be sent to UnityPlayer to enable pause and resource recreation on resume.
	protected void onPause()
	{
		super.onPause();
		Constants.mUnityPlayer.pause();
	}
	protected void onResume()
	{
		super.onResume();
		Constants.mUnityPlayer.resume();
	}
	public void onConfigurationChanged(Configuration newConfig)
	{
		super.onConfigurationChanged(newConfig);
		Constants.mUnityPlayer.configurationChanged(newConfig);
	}
	public void onWindowFocusChanged(boolean hasFocus)
	{
		super.onWindowFocusChanged(hasFocus);
		Constants.mUnityPlayer.windowFocusChanged(hasFocus);
	}
	public boolean dispatchKeyEvent(KeyEvent event)
	{
		if (event.getAction() == KeyEvent.ACTION_MULTIPLE)
			return Constants.mUnityPlayer.onKeyMultiple(event.getKeyCode(), event.getRepeatCount(), event);
		return super.dispatchKeyEvent(event);
	}

}

/**
 * 展示u3d的界面
 * @author gavin
 *
 */
public class U3dFragment extends Fragment {

	private Activity context;
	View playerView;
	@Override
	public void onAttach(Activity activity) {
		// TODO Auto-generated method stub
		super.onAttach(activity);
		context = activity;
	}

	@Override
	public void onCreate(Bundle savedInstanceState) {
		// TODO Auto-generated method stub
		super.onCreate(savedInstanceState);
	}

	@Override
	public View onCreateView(LayoutInflater inflater,
			@Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
		// TODO Auto-generated method stub
		playerView = Constants.mUnityPlayer.getView();
		LayoutParams lp = new LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT);
		playerView.setLayoutParams(lp);
		if(playerView.getParent() != null){
			((ViewGroup)playerView.getParent()).removeAllViews();
		}
		return playerView;
	}

	@Override
	public void onDestroy() {
		// TODO Auto-generated method stub
//		Constants.mUnityPlayer.quit();
		super.onDestroy();
	}

	@Override
	public void onPause() {
		// TODO Auto-generated method stub
		super.onPause();
		Constants.mUnityPlayer.pause();
	}

	@Override
	public void onResume() {
		// TODO Auto-generated method stub
		super.onResume();
		Constants.mUnityPlayer.resume();
	}
	
}

((ViewGroup)playerView.getParent()).removeAllViews();