Android中Activity和Fragment传递数据的两种方式

 MyFragment myFragment = new MyFragment();
    Bundle bundle = new Bundle();
    bundle.putString("DATA",values);//这里的values就是我们要传的值
    myFragment.setArguments(bundle);

//宿主activity中的getTitles()方法
public String getTitles(){
  return "hello";
}

//Fragment中的onAttach方法
  @Override
  public void onAttach(Activity activity) {
    super.onAttach(activity);
    titles = ((MainActivity) activity).getTitles();
  }
//通过强转成宿主activity，就可以获取到传递过来的数据

static MyFragment newInstance(String s){
    MyFragment myFragment = new MyFragment();
    Bundle bundle = new Bundle();
    bundle.putString("DATA",s);
    myFragment.setArguments(bundle);
    return myFragment;
  }

//同样，在onCreatView中直接获取这个值
 @Nullable
  @Override
  public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
    View view = inflater.inflate(R.layout.layout_fragment,container,false);
    Bundle bundle = getArguments();
    String data = bundle.getString("DATA");
    tv = (TextView) view.findViewById(R.id.id_fm_tv);
    if(data != null){
      tv.setText(data);
    }
    return view;
  }

FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
    fragmentTransaction.setCustomAnimations(android.R.anim.fade_in,android.R.anim.fade_out);
    fragment1 = MyFragment.newInstance("这是第一个fragment");//这里只需要直接调用这个方法，就创建了一个fragment
    fragment2 = MyFragment.newInstance("这是第二个fragment");
    fragment3 = MyFragment.newInstance("这是第三个fragment");