思路：

第一步。建立一个activity。用来管理fragment。

第二步‘获取fragmentManger 和fragmentTraction.

private FragmentManager fm;
private FragmentTransaction ft;
fm = getFragmentManager();
ft = fm.beginTransaction();

第三步，调用切换方法

ft.replace(android.R.id.content, new Fragment01());
ft.commit();

第四步，建立fragment

4.1 复写方法fragment生命周期方法

@Override
	public View onCreateView(LayoutInflater inflater, ViewGroup container,
			Bundle savedInstanceState) {
		return inflater.inflate(R.layout.fragment01, null);
		
	}
	
	@SuppressLint("NewApi")
	@Override
	public void onViewCreated(View view, Bundle savedInstanceState) {
		// TODO Auto-generated method stub
		super.onViewCreated(view, savedInstanceState);
		initView(view);
		
	}
	
	
	private void initView(View view) {
		btn=(Button) view.findViewById(R.id.btn);
		btn.setOnClickListener(new OnClickListener() {
			
			@Override
			public void onClick(View arg0) {
				<strong>getFragmentManager().beginTransaction().replace(android.R.id.content, new Fragment02()).commit();</strong>
				
			}
		});
		
	}